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Toshiba e-studio281c Service Manual Download Page 284

e-STUDIO281c/351c/451c

© 2005 - 2008 TOSHIBA TEC CORPORATION All rights reserved

DEVELOPER UNIT

12 - 14

12.6 High-Voltage Transformer Output Control Circuit

Developer bias is supplied from high-voltage power supply to the developer sleeve and the toner image 
on the developer sleeve is transferred onto the photoconductive drum.
A color developer bias and a black developer bias are output separately.
Each developer bias consists of DC and AC which has an independent ON/OFF control. At DC, D/A 
converter adjusts the level of output value in both color and black modes since each mode has a differ-
ent control condition.

 Fig. 12-10

• Outputs adjustment value of the developer bias (DC) in the NVRAM to the gate array.

↓

• Outputs control voltage data from the gate array to the D/A converter.

↓

• Analog conversion by the D/A converter.

↓

• Outputs control voltage Vc to the developer bias transformer.

↓

• The developer bias transformer generates output voltage proportional to the control voltage Vc by 

ON signed.
* Adjustment of the control voltage Vc (change of adjustment data) is performed in the adjustment 

mode.

Engine

CPU

D/A

converter

High-voltage

transformer

Gate array

#2

KCDVDON

KDVAON

CDVAON

KDVVR

CDVVR

Photoconductive

drum

Black developer 
sleeve

Color developer sleeve

NVRAM

Summary of Contents for e-studio281c

Page 1: ...SERVICE MANUAL MULTIFUNCTIONAL DIGITAL COLOR SYSTEMS e STUDIO281c 351c 451c File No SME050004D0 R05032182501 TTEC Ver04_2008 04 ...

Page 2: ... tries Apple AppleTalk Macintosh and Mac are trademarks of Apple Computer Inc in the U S and other countries PostScript is a trademark of Adobe Systems Incorporated NOVELL NetWare and NDS are trademarks or registered trademarks of Novell Inc Molykote is a registered trademark of Dow Corning Corporation iCLASS is a trademark of HID Corporation MIFARE is a trademark of Royal Philips Electronics Othe...

Page 3: ...orting the equipment Be sure to use a dedicated outlet with AC 110 V 13 2 A 115 V or 127 V 12 A 220 240 V or 240 V 8 A for its power source The equipment must be grounded for safety Select a suitable place for installation Avoid excessive heat high humidity dust vibration and direct sunlight Provide proper ventilation since the equipment emits a slight amount of ozone To insure adequate working sp...

Page 4: ...charge may remain in the capacitors etc on them even after the power is turned OFF Make sure that the equipment will not operate before touching potentially dangerous places e g rotating operating sections such as gears belts pulleys fans and laser beam exit of the laser optical unit Be careful when removing the covers since there might be the parts with very sharp edges underneath When servicing ...

Page 5: ...s including lithium batteries follow the relevant local regulations or rules Caution Dispose of used batteries and IC RAMs including lithium batteries according to this manual Attention Se débarrasser de batteries et IC RAMs usés y compris les batteries en lithium selon ce manuel Vorsicht Entsorgung der gebrauchten Batterien und IC RAMs inclusive der Lithium Batterie nach diesem Handbuch ...

Page 6: ......

Page 7: ... 2 3 3 Details of Copying Process 3 3 3 4 List of Copying Process Conditions 3 14 4 GENERAL OPERATION 4 1 4 1 Overview of Operation 4 1 4 2 Description of Operation 4 2 4 2 1 Warming up 4 2 4 2 2 Ready ready for copying 4 2 4 2 3 Drawer feed copying Upper drawer paper feeding 4 3 4 2 4 Bypass feed copying 4 8 4 2 5 Interruption copying 4 8 4 3 Detection of Abnormality 4 9 4 3 1 Types of abnormalit...

Page 8: ...ions of image processing circuit 7 4 7 4 LOGIC PC BOARD LGC 7 9 7 4 1 Features 7 9 7 4 2 Functions of image processing circuit 7 9 8 LASER OPTICAL UNIT 8 1 8 1 General Description 8 1 8 2 Structure 8 3 8 3 Laser Diode 8 7 8 4 Laser Unit Cooling Fan 8 8 8 5 Polygonal Motor M4 8 9 8 6 Laser Driving PC Board LDR 8 10 8 7 Disassembly and Replacement 8 11 9 DRIVE SYSTEM 9 1 9 1 General Description 9 1 ...

Page 9: ...ner motor M3 12 3 12 4 Black Developer Unit 12 4 12 4 1 Functions 12 4 12 4 2 Black developer unit drive section 12 5 12 4 3 Black auto toner sensor circuit 12 6 12 4 4 Black developer unit lifting mechanism 12 8 12 5 Color Developer Unit 12 9 12 5 1 Functions 12 9 12 5 2 Color developer unit drive section 12 10 12 5 3 Color auto toner sensor circuit 12 11 12 5 4 Color toner supply 12 13 12 6 High...

Page 10: ...nfiguration 16 6 16 5 2 Heating principle of IH Heater 16 7 16 5 3 IH control circuit interface 16 8 16 5 4 Relation between system configuration and IH output 16 9 16 5 5 Abnormality in the IH control circuit 16 10 16 5 6 Temperature detection section 16 12 16 6 Control Circuit of Exit Motor 16 18 16 7 Disassembly and Replacement 16 19 17 AUTOMATIC DUPLEXING UNIT ADU 17 1 17 1 General Description...

Page 11: ...d Copies min e STUDIO281c e STUDIO351c e STUDIO451c means Not acceptable When originals are manually placed for single sided continuous copying Plain paper is selected for the paper type When the Reversing Automatic Document Feeder is used copying in the speed of 28 35 and 45 sheets per minute are only possible under the following conditions Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT...

Page 12: ... Index Thick3 164 g m2 to 209 g m2 91 lb Index to 110 lb Index OHP Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size not specified A4 LT 28 11 28 11 16 5 28 11 28 11 B5 A5 R ST R A4 R B5 R LT R 20 5 20 5 16 5 20 5 B4 LG 18 5 18 5 16 5 18 5 A3 LD 16 5 16 5 16 5 16 5 Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size not specified A4 LT ...

Page 13: ...4 LT 30 11 30 11 16 5 30 11 30 11 B5 A5 R ST R A4 R B5 R LT R 23 5 23 5 16 5 23 5 B4 LG 19 5 19 5 16 5 19 5 A3 LD 16 5 16 5 16 5 16 5 Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size not specified A4 LT B5 A5 R ST R 20 6 10 2 A4 R B5 R LT R 14 3 10 2 B4 LG 11 3 10 2 A3 LD 10 2 10 2 Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size no...

Page 14: ...mode Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size not specified A4 LT 30 11 30 11 16 5 30 11 30 11 B5 A5 R ST R A4 R B5 R LT R 23 5 23 5 16 5 23 5 B4 LG 19 5 19 5 16 5 19 5 A3 LD 16 5 16 5 16 5 16 5 Paper supply Paper size Drawer Bypass feed PFP LCF A4 LT only Size specified Size not specified A4 LT B5 A5 R ST R 20 6 10 2 A4 R B5 R LT R 14 3 10 2 B4 LG 11 3 10 ...

Page 15: ...t to 600 dpi x 600 dpi color Copy mode Sec e STUDIO281c e STUDIO351c e STUDIO451c Single sided originals Single sided copies 1 set 31 26 71 97 28 15 71 97 24 99 71 97 3 sets 74 07 182 19 61 02 182 19 50 03 182 19 5 sets 116 64 289 94 95 19 289 94 76 63 289 94 Single sided originals Double sided copies 1 set 32 61 81 63 29 65 81 63 28 49 81 63 3 sets 74 69 189 38 64 92 189 38 60 76 189 38 5 sets 11...

Page 16: ...o 100 sheets 64 to 80 g m2 17 to 22 lb Bond Capacity of originals in the reversing automatic document feeder Option A3 to A5 R LD to ST R 100 sheets 80 g m2 Stack height 16 mm or less Automatic duplexing unit Stackless Switchback type Toner supply Automatic toner density detection supply Toner cartridge replacing method Density control Automatic density mode and manual density mode selectable in 1...

Page 17: ...on 1 set Operator s manual 4 pcs except for MJD and ASU Operator s manual pocket 1 pc Power cable 1 pc Warranty sheet 1 pc for NAD Setup report 1 set for NAD MJD and CND PM sticker 1 pc for MJD Drum installed inside of the equipment 1 pc Control panel stopper 1 pc Color developer holder 6 pc Rubber plug 4 pcs Blind seal small large 3 pcs 1 pc CD ROM 3 pcs Developer material Y M C K 1 pc each for C...

Page 18: ...alled together only 1 antenna GN 3010 can be connected to each Platen cover KA 3511PC C Reversing Automatic Document Feeder RADF MR 3018 Drawer module MY 1021 C Paper Feed Pedestal PFP KD 1011 C Large Capacity Feeder LCF KD 1012 A4 LT A4 C Hanging Finisher MJ 1022 C Finisher MJ 1023 C MJ 1101 Saddle Stitch Finisher MJ 1024 C Hole punch unit MJ 6004 N E F S E C for MJ 1023 1024 MJ 6101 N E F S for ...

Page 19: ...M Developer C D 281C C Toner cartridge K PS ZT281C K 4 NAD PS ZT281C EK 1 MJD PS ZT3511DK Others PS ZT3511TK TWD PS ZT3511CK CND Toner cartridge Y PS ZT281C Y 4 NAD PS ZT281C EY 1 MJD PS ZT3511DY Others PS ZT3511TY TWD PS ZT3511CY CND Toner cartridge M PS ZT281C M 4 NAD PS ZT281C EM 1 MJD PS ZT3511DM Others PS ZT3511TM TWD PS ZT3511CM CND Toner cartridge C PS ZT281C C 4 NAD PS ZT281C EC 1 MJD PS Z...

Page 20: ...e for FAX unit GD 1160 NA EU N C TW AU AS Wireless LAN module GN 1040 1041 Parallel interface kit GF 1140 PCI slot GO 1060 Scrambler board GP 1040 Data overwrite kit GP 1060 Drawer Module MY 1021 Large Capacity Feeder LCF KD 1012 A4 LT Paper Feed Pedestal PFP KD 1011 Hanging Finisher MJ 1022 Finisher MJ 1101 Hole Punch Unit MJ 6101 N E F S Staple Cartridge STAPLE 2000 Staple Cartridge STAPLE 2400 ...

Page 21: ... OUTLINE OF THE MACHINE 2 1 Sectional View A Front side view Fig 2 1 2 9 6 7 5 3 4 8 1 10 11 12 41 42 34 35 13 14 15 16 17 18 19 20 21 22 23 25 26 24 27 28 29 32 31 30 44 33 36 37 38 39 40 43 63 45 46 47 82 48 49 50 51 52 53 55 56 57 83 58 59 60 61 62 64 65 66 67 68 69 70 71 71 72 73 74 75 76 77 78 79 80 81 ...

Page 22: ... 19 Toner recovery auger 61 Thermistor 20 Discharge LED 62 Thermostat 21 Drum thermistor 63 IH coil 22 Black developer unit 64 Exit roller 23 Developer sleeve K 65 Upper drawer pickup roller 24 Mixer 1 K 66 Upper drawer feed roller 25 Mixer 2 K 67 Upper drawer separation roller 26 Black auto toner sensor 68 Lower drawer pickup roller 27 Revolver unit 69 Lower drawer feed roller 28 Revolver home po...

Page 23: ... All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 3 B Rear side view Drive system Fig 2 2 CLT1 CLT8 CLT9 CLT10 M12 M9 M7 M8 M1 M6 M10 M13 M11 M4 CLT11 CLT13 CLT16 CLT3 CLT15 CLT2 CLT14 CLT12 CLT15 CLT17 CLT16 M3 M5 M2 ...

Page 24: ...or M13 Charger cleaner motor CLT1 Transfer belt cleaner clutch CLT2 Upper drawer feed clutch CLT3 Lower drawer feed clutch CLT5 2nd transfer roller contact clutch CLT6 Bypass feed clutch CLT7 ADU clutch CLT8 Color developer toner supply clutch CLT9 Color developer drive clutch CLT10 Black developer drive clutch CLT11 Black developer lifting clutch CLT12 Registration clutch CLT13 Upper transport cl...

Page 25: ...81c 351c 451c OUTLINE OF THE MACHINE 2 5 2 2 Electric Parts Layout A Unit construction Fig 2 3 Drive unit PC board unit Process unit Laser unit Paper feeder unit Transport unit Bypass unit Front side Scanner unit Control panel unit Fuser unit Automatic duplexing unit ...

Page 26: ...008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 6 B Scanner unit B 1 Motor sensor lamp A4 series Fig 2 4 LT series Fig 2 5 S5 S4 S3 S2 S1 EXP M15 M1 S6 S7 Front side Front side S5 S4 S3 S2 EXP M15 M1 S6 S7 ...

Page 27: ...TUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 7 B 2 Switch PC board heater thermostat other part Fig 2 6 ASD AUD CND SAD ASU TWD KRD model Standard NAD MJD model Option C Control panel unit Fig 2 7 Front side CCD SLG S41 DH1 INV DH2 THMO2 Front side KEY DSP LCD ...

Page 28: ...ess unit D 1 Motor sensor switch clutch solenoid Fig 2 8 D 2 Motor sensor switch solenoid lamp heater thermistor thermostat Fig 2 9 ASD AUD CND SAD ASU TWD KRD model Standard NAD MJD model Option Front side S15 S16 S19 M16 S11 S12 M20 S10 SOL1 M2 CLT1 S8 S9 Front side S17 SOL2 S14 M3 ERS S13 THM4 DH3 THMO3 S20 ...

Page 29: ...2 2005 2008 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 9 D 3 Motor switch Fig 2 10 E Laser unit Fig 2 11 Front side M13 S26 S25 Front side M4 LDR SNS ...

Page 30: ... 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 10 F Paper feeder unit Fig 2 12 G Transport unit Fig 2 13 Front side S28 S27 S29 CLT3 S30 CLT2 S31 S33 S32 S34 Front side CLT5 S43 S42 S24 S44 S23 S18 S22 ...

Page 31: ...IBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 11 H Bypass unit Fig 2 14 I Automatic duplexing unit Fig 2 15 Front side S36 S35 SOL3 SFB CLT6 Front side S39 S38 S37 CLT7 ADU M5 ...

Page 32: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 12 J Fuser unit Fig 2 16 Front side S40 THM1 THM3 THM2 THMO1 IH COIL ...

Page 33: ...IBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 13 K Drive unit Fig 2 17 Front side CLT11 M10 CLT16 CLT15 CLT13 CLT14 CLT12 M9 M8 M18 M7 IH HVT M11 CLT10 CLT9 CLT8 M12 DRV M17 M6 ...

Page 34: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 14 L PC board unit Fig 2 18 Front side FIL BRK M19 SYS M21 PS LGC HDD ...

Page 35: ...oller registration roller transport roller and feed roller K 16 26 M10 TRY MOT Tray up motor Driving the lifting movement of trays in upper lower drawer K 4 26 M11 DEV MOT Developer motor Driving the black color developer unit Driving the lifting movement of the black developer unit Supplying the color toner Driving the transfer belt contact release movement K 15 1 M12 REVLV MOT Revolver motor Dri...

Page 36: ...to toner sensor Detecting the density of toner in the black developer unit D 2 34 25 S14 K TNR SW Black toner cartridge switch Black toner cartridge presence absence detection D 2 37 12 S15 TRBLT HP SNR1 Transfer belt home position sensor 1 Detecting the rotation position of trans fer belt for timing of speed switching in thick paper OHP film mode D 1 29 9 S16 TRBLT HP SNR2 Transfer belt home posi...

Page 37: ...U SW Upper drawer detection switch Detecting presence absence of the upper drawer F 4 101 S34 CST L SW Lower drawer detection switch Detecting presence absence of the lower drawer F 4 101 S35 SFB SNR Bypass paper sensor Detecting presence absence of paper on the bypass tray H 22 5 S36 SFB FED SNR Bypass feed sensor Detecting the transporting paper fed from the bypass tray H 22 5 S37 ADU SET SW ADU...

Page 38: ...eveloper drive clutch Driving the color developer magnetic roller K 15 32 CLT10 K DEV CLT Black developer drive clutch Driving the black developer magnetic roller K 15 28 CLT11 K DEV LIFT CLT Black developer lifting clutch Driving the black developer lifting cam K 15 12 CLT12 RGST CLT Registration clutch Driving the registration roller K 16 29 CLT13 CST U TR L CLT Upper transport clutch Low speed ...

Page 39: ...d LDR board Driving the laser diode E 10 10 SNS PWA F SNS H sync signal detection PC board SNS board Detection of the laser beam position E 10 10 SFB PWA F SFB Bypass tray slide guide width detection PC board SFB board Detection of the bypass tray slide guide width H 20 13 ADU PWA F ADU ADU driving PC board ADU board Controlling the automatic duplexing unit I 43 30 IH PS IH IH control PC board IH ...

Page 40: ...ion D 2 35 23 Symbol Name Function Remarks P I THM1 THMS EDGE FBLT Front edge thermistor Detecting the surface temperature at the edge of the front side of the fuser belt for preventing overheating at the edge of the fuser belt J 42 15 THM2 THMS MAIN FBLT Main thermistor Detecting the surface temperature at the fuser belt center for controlling the center IH coil J 42 15 THM3 THMS SUB FBLT Sub the...

Page 41: ... grid Developer bias color and black Transfer bias 1st and 2nd transfer K 7 10 Symbol Name Function Remarks P I INV INV EXP Inverter board Controlling the exposure lamp B 2 26 7 LCD LCD LCD panel Displaying and entering each informa tion C 3 19 HDD HDD Hard disk Storing the program data and image data L 8 115 PS PS ACC Switching regulator Generating DC voltage and supplying it to each section of t...

Page 42: ...unit Key counter Copy key card Finisher Bridge unit Bus transceiver I O Finisher CCD ASIC LVDS receiver Scanner CPU 22MHz Flash ROM 512KB SRAM 128KB Amp Amp Amp A D A D A D LVDS driver R G K odd B K even FRAM 256KB ASIC ASIC ASIC Ether PHY SRAM 512KB Battery RTC Flash ROM 8MB Flash ROM 8MB ASIC Control panel HDD Main memory DDR DIMM 256MB System CPU 600MHz North bridge System controller Page memor...

Page 43: ...posure lamp and scan motor are started by the command from the Scanner CPU And the image processing is per formed for the image data sent from the CCD by each ASIC INV board This is the board on which the lighting control circuit of the exposure lamp is mounted The exposure lamp lights by the command from the Scanner CPU DSP board This is the board to mainly control the control panel The Panel pro...

Page 44: ...ory DIMM Flash ROM SRAM NVRAM RTC Real Time Clock IC etc The System CPU controls each ASIC to perform the control of the image processing image memory page memory main memory HDD external interface 10 100 BASE T TX USB PCI IEEE 1284 and FAX And based on the input data from the control panel System CPU communicates with Scanner CPU on the SLG board and Engine CPU on the LGC board and then issues an...

Page 45: ...lacement of Covers A Front cover B Maintenance tray 1 Open the front cover 2 Remove the toner bag P 11 10 A Toner bag 3 Pull up 2 hinge pins on the left and the right and then extract them inside 4 Take off the front cover Fig 2 21 1 Remove 1 screw and take off the mainte nance tray Fig 2 22 Hinge pin Front cover Maintenance tray ...

Page 46: ...intenance tray P 2 25 B Maintenance tray 2 Open the front cover 3 Remove 1 screw and take off the Inner tray Fig 2 23 1 Take off the inner tray P 2 26 C Inner tray 2 Remove 1 screw and take off the tray back cover Fig 2 24 1 Take off the front cover P 2 25 A Front cover 2 Take off the black developer unit cover Fig 2 25 Inner tray Tray back cover Black developer unit cover ...

Page 47: ...cover G Front upper cover 3 Release 4 latches and take off the front lower cover Fig 2 26 1 Remove the toner bag P 11 10 A Toner bag 2 Remove 2 screws and take off the center inner cover Fig 2 27 1 Remove 2 screws and take off the front upper cover Fig 2 28 Front lower cover Center inner cover Screw Screw Front upper cover ...

Page 48: ...ws and take off the right front hinge cover Fig 2 30 1 Take off the front lower cover P 2 26 E Front lower cover 2 Take off the center inner cover P 2 27 F Center inner cover 3 Take off the front upper cover P 2 27 G Front upper cover 4 Take off the right upper cover P 2 28 H Right upper cover 5 Take off the right front hinge cover P 2 28 I Right front hinge cover 6 Remove 2 screws and take off th...

Page 49: ...cover 1 Open the front cover 2 Remove 2 screws and take off the left cover Fig 2 32 1 Remove 2 screws and take off the left upper cover Fig 2 33 1 Take off the left cover P 2 29 K Left cover 2 Take off the left upper cover P 2 29 L Left upper cover 3 Remove 3 screws and take off the left rear cover Fig 2 34 Left cover Left upper cover Left rear cover ...

Page 50: ...pen the ADU 2 Open the 2nd transfer unit 3 Open the fuser unit cover 4 Remove 2 screws and take off the IH termi nal cover Fig 2 35 1 Take off the right upper cover P 2 28 H Right upper cover 2 Take off the IH terminal cover P 2 30 N IH terminal cover 3 Remove 1 screw and take off the ozone filter cover P 11 23 Q Ozone filter 4 Remove 2 screws and take off the right rear cover Fig 2 36 IH terminal...

Page 51: ...lower cover R Rear cover 1 1 Remove 2 screws and take off the right rear hinge cover Fig 2 37 1 Take off the right rear hinge cover P 2 31 P Right rear hinge cover 2 Remove 2 screws and take off the right lower cover Fig 2 38 1 Remove 1 screw and take off the connector cover Fig 2 39 Right rear hinge cover Right lower cover Connector cover ...

Page 52: ...over 1 P 2 31 R Rear cover 1 2 Remove 3 screws and take off the rear cover 2 Note Disconnect the connector of the RADF first when the RADF is installed Fig 2 41 1 Take off the RADF or the platen cover 2 Take off the left rear cover P 2 29 M Left rear cover 3 Take off the right rear cover P 2 30 O Right rear cover 4 Remove 2 screws and take off the upper rear cover Fig 2 42 Rear cover 1 Rear cover ...

Page 53: ...Notes and Cautions of Replace ment of PC boards and HDD in Chapter 5 3 of the Service Handbook A HDD cooling fan M21 1 Take off the rear cover 1 P 2 31 R Rear cover 1 2 Disconnect 1 connector Release the har ness from the harness clamp Fig 2 43 3 Loosen 11 screws and take off the SYS board cover Fig 2 44 4 Disconnect 1 connector Remove 2 screws and take off the HDD cooling fan Fig 2 45 SYS board c...

Page 54: ... Rear cover 1 2 Take off the SYS board cover P 2 33 A HDD cooling fan M21 3 Disconnect 2 connectors Fig 2 46 4 Remove 1 screw and the ground wire Remove 4 screws and take off the hard disk Fig 2 47 1 Take off the SYS board cover P 2 33 A HDD cooling fan M21 2 Disconnect 2 connectors remove 2 screws and then take off the hard disk with the stay Fig 2 48 Hard disk Hard disk ...

Page 55: ...ors Remove 2 harness clamps Fig 2 49 4 Remove 8 screws and then take off 2 leaf springs and the SYS board Fig 2 50 1 Take off the rear cover 2 P 2 32 S Rear cover 2 2 Take off the right rear cover P 2 30 O Right rear cover 3 Take off the SYS board cover P 2 33 A HDD cooling fan M21 4 Loosen 2 screws and take off the PS cover Leaf spring PS cover ...

Page 56: ...N All rights reserved OUTLINE OF THE MACHINE 2 36 5 Disconnect 4 connectors Fig 2 51 6 Release harnesses from 4 harness clamps Fig 2 52 7 Remove 4 screws Take off the SYS board case while releasing the harness from the harness clamp Fig 2 53 SYS board case ...

Page 57: ...F THE MACHINE 2 37 E LGC board LGC 1 Take off the rear cover 2 P 2 32 S Rear cover 2 2 Loosen 13 screws and take off the LGC board cover Fig 2 54 3 Disconnect 21 connectors Fig 2 55 4 Remove 4 screws release 2 lock supports and then take off the LGC board Fig 2 56 LGC board cover LGC board ...

Page 58: ... Take off the rear cover 2 P 2 32 S Rear cover 2 2 Take off the SYS board cover P 2 33 A HDD cooling fan M21 3 Take off the LGC board cover P 2 37 E LGC board LGC 4 Disconnect 22 connectors Fig 2 57 5 Release harnesses from 12 harness clamps Fig 2 58 6 Remove 4 screws and take off the LGC board case Fig 2 59 LGC board case ...

Page 59: ... Take off the LGC board cover P 2 37 E LGC board LGC 3 Take off the SYS board cover P 2 33 A HDD cooling fan M21 4 Loosen 2 screws and take off the PS cover Fig 2 60 5 Disconnect 8 connectors Fig 2 61 6 Remove 1 harness clamp Release the har ness from 1 harness clamp Remove 3 screws and take off the switching regulator unit while the unit is inclined Fig 2 62 Switching regulator unit ...

Page 60: ...itching regulator unit P 2 39 G Switching regulator unit 2 Disconnect 1 connector remove 4 screws and take off the power cooling fan Fig 2 63 1 Take off the power supply cooling fan P 2 40 H Power supply cooling fan M19 2 Remove 9 screws and take off the switching regulator cover Fig 2 64 3 Remove 12 screws 1 screw fastened by a nut and take off the switching regulator Fig 2 65 Power supply coolin...

Page 61: ...ctricshock 1 Take off the switching regulator unit P 2 39 G Switching regulator unit 2 Disconnect 8 connectors Fig 2 66 3 Remove 2 screws release 2 lock supports and take off the high voltage transformer Fig 2 67 1 Take off the rear cover 2 P 2 32 S Rear cover 2 2 Take off the right lower cover P 2 31 Q Right lower cover 3 Remove 1 screw and take off the cover plate Fig 2 68 High voltage transform...

Page 62: ... rights reserved OUTLINE OF THE MACHINE 2 42 4 Remove 5 screws and take off the filter bracket Fig 2 69 5 Disconnect 4 connectors and 2 terminals Fig 2 70 6 Remove 2 screws release 2 lock supports and then take off the FIL board Fig 2 71 Filter bracket FIL board ...

Page 63: ...ll rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 43 L DRV board DRV 1 Take off the LGC board case P 2 38 F LGC board case 2 Disconnect 4 connectors Fig 2 72 3 Remove 4 screws and take off the DRV board Fig 2 73 DRV board ...

Page 64: ...HINE 2 44 2 7 Removal and Installation of Options A MR 3018 Reversing Automatic Document Feeder RADF 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover Fig 2 74 3 Disconnect the connector Fig 2 75 4 Remove 1 screw and 1 washer on the rear side Fig 2 76 Connector cover ...

Page 65: ...08 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 45 5 Remove 1 screw on the rear side Fig 2 77 6 Open the RADF Fig 2 78 7 Remove 2 screws on the front side Fig 2 79 ...

Page 66: ... RADF and installing the platen cover or disinstalling the platen cover and installing the RADF tighten the screw for installing the damper holding bracket of the scanner in the following proce dure Remove 1 screw and take off the gel cover Fig 2 81 Change the position of the screw for installing the damper holding bracket Installing the RADF A Installing the platen cover B Fig 2 82 Gel cover A B ...

Page 67: ... OFF the power and unplug the power cable 2 Remove 1 screw and take off the connector cover of the equipment Fig 2 83 3 Remove 2 screws and take off the rear cover 1 Fig 2 84 4 Remove 3 screws and take off the rear cover 2 Note Disconnect the connector of the RADF first when the RADF is installed Fig 2 85 Connector cover Rear cover 1 Rear cover 2 ...

Page 68: ...HINE 2 48 5 Remove 1 screw and the ground wire and then disconnect 2 connectors 3 if the optional damp heater is installed Fig 2 86 6 Remove 2 screws and take off 2 fixing brack ets on the rear side Fig 2 87 7 Take off the lower drawer of the equipment and PFP upper drawer Fig 2 88 Fixing bracket ...

Page 69: ...e Capacity Feeder LCF 8 Remove 4 screws and take off 2 fixing brack ets on the front side Fig 2 89 9 Lift up the equipment and take off the PFP Fig 2 90 1 Turn OFF the power and unplug the power cable 2 Remove 1 screw and take off the connector cover of the equipment Fig 2 91 Fixing bracket Fixing bracket Connector cover ...

Page 70: ...ws and take off the rear cover 1 Fig 2 92 4 Remove 3 screws and take off the rear cover 2 Note Disconnect the connectors of the RADF first when the RADF is installed Fig 2 93 5 Remove 1 screw and the ground wire and then disconnect 2 connectors 3 if the optional damp heater is installed Fig 2 94 Rear cover 1 Rear cover 2 ...

Page 71: ...ghts reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 51 6 Remove 2 screws and take off 2 fixing brack ets on the rear side Fig 2 95 7 Take off the lower drawer of the equipment Fig 2 96 8 Pull out the LCF drawer Fig 2 97 Fixing bracket ...

Page 72: ...her When PFP LCF is not installed 9 Remove 4 screws and take off 2 fixing brack ets on the front side Fig 2 98 10 Lift up the equipment and take off the LCF Fig 2 99 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 100 Fixing bracket Fixing bracket Connector cover ...

Page 73: ...OUTLINE OF THE MACHINE 2 53 3 Remove 2 screws and take off the safety bracket on the rear side and the cover Fig 2 101 4 Remove 2 screws and take off the safety bracket on the front side and the cover Fig 2 102 5 Remove 2 screws Fig 2 103 Cover Safety bracket Cover Safety bracket ...

Page 74: ...ACHINE 2 54 When PFP LCF is installed 6 Lift up the finisher and take it off Fig 2 104 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 105 3 Remove 2 screws and take off the cover on the rear side Fig 2 106 Connector cover Cover ...

Page 75: ...ORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 55 4 Remove 2 screws and take off the cover on the front side Fig 2 107 5 Remove 2 screws Fig 2 108 6 Lift up the finisher and take it off Fig 2 109 Cover ...

Page 76: ...2 56 E MJ 1023 Console finisher 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 110 3 Remove 1 screw and take off the finisher lower cover Fig 2 111 4 Remove 3 screws and take off the finisher front cover Fig 2 112 Connector cover Cover ...

Page 77: ...TEC CORPORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 57 5 Remove 1 screw Fig 2 113 6 Remove 1 screw and take off the cover of the finisher rear side Fig 2 114 7 Remove 1 screw Fig 2 115 Cover ...

Page 78: ...sole finisher 8 Take off the finisher Note Be careful not to fell the finisher when mov ing the finisher unit only Fig 2 116 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 117 3 Open the finisher front cover and remove 1 screw Fig 2 118 Connector cover ...

Page 79: ...281c 351c 451c OUTLINE OF THE MACHINE 2 59 4 Remove 1 screw and take off the cover of the finisher rear side Fig 2 119 5 Remove 1 screw Fig 2 120 6 Take off the finisher Note Note Be careful not to fell the finisher when moving the finisher unit only Fig 2 121 Cover ...

Page 80: ...1 Console finisher 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 122 3 Open the finisher front cover Remove 1 screw and pull out the fixing plate Fig 2 123 4 Loosen 1 screw and take off the ground wire Fig 2 124 Connector cover Fixing plate 06 07 ...

Page 81: ...h unit 5 Take off the finisher Note Be careful not to fell the finisher when mov ing only the finisher unit Fig 2 125 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect connector Fig 2 126 3 Open the front cover of the hole punch unit and remove 1 screw Fig 2 127 Connector cover 06 07 ...

Page 82: ...OSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 62 4 Take off the cover of the punch unit lower side Fig 2 128 5 Remove 1 screw Fig 2 129 6 Remove 3 screws and take off the punch unit rear cover Fig 2 130 Cover Cover ...

Page 83: ...ved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 63 7 Remove 1 screw Fig 2 131 8 Take off the finisher with the hole punch unit Note Be careful not to fell the finisher when mov ing the finisher unit only Fig 2 132 9 Disconnect 2 connectors Fig 2 133 ...

Page 84: ...d OUTLINE OF THE MACHINE 2 64 I MJ 6101 Hole punch unit 10 Remove 2 screws Fig 2 134 11 Lift up the punch unit and take it off Fig 2 135 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector Fig 2 136 Connector cover 06 07 ...

Page 85: ...5 3 Open the front cover of the hole punch unit Push the 2 latches and take off the hole punch unit front lower cover Fig 2 137 4 Open the finisher front cover Remove 1 screw and pull out the fixing plate Fig 2 138 5 Loosen 1 screw and take off the groune wire Fig 2 139 Front lower cover Fixing plate 06 07 ...

Page 86: ...UTLINE OF THE MACHINE 2 66 6 Take off the finisher with the hole punch unit Note Be careful not to fell the finisher when mov ing only the finisher unit Fig 2 140 7 Remove 1 screw and take off the connector cover Fig 2 141 8 Disconnect 1 connector Fig 2 142 Connector cover 06 07 ...

Page 87: ...IO281c 351c 451c OUTLINE OF THE MACHINE 2 67 9 Take off the cover of the hole punch unit rear lower cover Fig 2 143 10 Remove 1 screw and take off the cover Fig 2 144 11 Remove 4 screws Lift up the punch unit and take it off Fig 2 145 Rear lower cover Cover 06 07 ...

Page 88: ... All rights reserved OUTLINE OF THE MACHINE 2 68 J KN 3511 Bridge unit 1 Turn OFF the power and unplug the power cable 2 Remove 2 screws and take off the cover Fig 2 146 3 Disconnect 1 connector Fig 2 147 4 Open the bridge unit Remove 1 screw Fig 2 148 Cover ...

Page 89: ...ORATION All rights reserved e STUDIO281c 351c 451c OUTLINE OF THE MACHINE 2 69 5 Take off the cover Fig 2 149 6 Close the bridge unit and remove 1 screw Fig 2 150 7 Remove 4 screws and take off the bracket Fig 2 151 Cover Bracket ...

Page 90: ... STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 70 8 Lift up the bridge unit and release the hook Take off the bridge unit toward the front Fig 2 152 ...

Page 91: ...ixture of the above three colors at proper ratio Fig 3 1 This equipment adopts a revolver mechanism which combines the three developer units of yellow magenta and cyan In this process each image of cyan magenta and yellow is developed in order by rotating these developers and overlaid on the transfer belt one after another Then the black image developed by independent black developer unit is overl...

Page 92: ...ade cleaning While scraping off the resid ual toner from the drum by the blade this blade also eliminates the residual charge on the drum left after image transfer 5 Development Negatively charged toner is made to adhere to the photoconductive drum producing a visible image 10 Discharging Eliminates the residual charge from the surface of the photocon ductive drum Carrier Toner Photocon ductive dr...

Page 93: ... incident light Increases resistance works as an insulator Fig 3 4 Formation of electrostatic latent images In the processes of charging data reading data writing and discharging described below the areas on the drum corresponding to colored areas on the original are deprived of negative charge while the areas on the drum corresponding to white areas retain the negative charge Thus it forms a neg ...

Page 94: ...e The charger wire produces negative corona discharge which is controlled by the grid so that the drum surface is evenly charged with negative potential The surface potential on the drum is determined by the grid potential and is controlled to a fixed value by the grid control circuit Fig 3 6 Grid control circuit High voltage transformer Main charger Rotation of drum ...

Page 95: ...age signals which are then transmitted to the image processing section via the scanner control PC board Fig 3 7 The CCD for color processing has RGB filters provided over its surface which allow the CCD to read the light amount in the respective ranges of wavelength The image data corresponding to the respective RGB colors is then transmitted to the image processing section Fig 3 8 CCD board Image...

Page 96: ...ght signals and exposing the drum surface with the light signal Namely the image signals transmitted from the image processing section are converted into optical signals laser emission by the semiconductor laser element which are then used to expose the drum surface thus forming an electrostatic latent image there Fig 3 9 Semiconductor laser element Polygonal mirror Image processing section Laser ...

Page 97: ...r than the developer bias which is applied to the magnetic roller reverse develop ment Fig 3 12 Fig 3 10 Fig 3 11 Drum Magnetic roller Magnet Photoconductive layer Magnetic roller Photocon ductive drum Aluminum base Toner Carrier always attracted onto the magnet Toner Bias voltage 400V 100 to 900V DC 1 2kV 10kHz AC Toner Bias voltage When the potential of the photoconductive drum is higher than th...

Page 98: ... Carrier Consists of ferrite and over its surface resin coating to provide consistent frictional electrification Fig 3 13 Note If the developer material is used for a long period of time beyond its normal life span toner will become caked onto the carrier The performance of the carrier is lowered Result 1 Image density is lowered 2 Toner scattering occurs 3 Background fogging occurs Solution Repla...

Page 99: ...que Inside magnetic rollers the south and north poles are arranged as shown in the figure below The developer material forms a brush like fluff which contacts the photoconductive drum surface This is caused by the lines of magnetic force between the south and north poles Fig 3 15 N S S Lines of magnetic force Magnetic roller Photoconductive drum ...

Page 100: ...ns fer belt to be positively charged This in turn helps to form an electric field E between the transfer belt positive and the photoconductive layer of the photoconductive drum grounded thus mak ing the toner image transferred to the transfer belt In the copy process of this equipment images are transferred in the order of K C M Y on the transfer belt Fig 3 16 Fig 3 17 Photoconductive drum Transfe...

Page 101: ...arization and thus the toner is transferred from the belt to the paper Fig 3 18 8 Fusing process Fusing is a process of melting the toner on the paper and fixing it firmly onto the paper Method The softening point of the toner main component resin is 105 120 C Heat Toner is melted by the fuser belt Pressure The fuser belt is pressed against the pressure roller by the springs to increase adherence ...

Page 102: ...ge on their surface cannot be eliminated optically Therefore voltage is applied to the conductive blade which is pressed against the drum to eliminate the charge applied at the transfer process Fig 3 20 Cleaning The edge of the conductive blade is pressed against the photoconductive drum surface to scrape off residual toner The toner removed is then caught by the recovery blade Fig 3 21 800V 800V ...

Page 103: ...oconductive drum surface causes uneven application of the charge for the next copying The next copy obtains a double image The preceding image remains To prevent this The entire surface of the photoconductive drum is flooded with light by the discharge LED array The photoconductive drum becomes electrically conductive All of the charge remaining on the photoconductive drum is conducted away to gro...

Page 104: ... 3511 K black T 3511 K black T 3511 Y yellow T 3511 Y yellow T 3511 M magenta T 3511 M magenta T 3511 C cyan T 3511 C cyan Marked E D C and T 6 D 3511 K black D 3511 Y yellow D 3511 M magenta D 3511 C cyan 7 DC 100 to 900 V adjusting by image quality control Color AC 1 0 kV 10 kHz Black AC 1 2 kV 10 kHz NAD T 281C K T281C Y T 281C M T281C C MJD T 281CE K T281CE Y T 281CE M T 281CE C TWD T 3511T K ...

Page 105: ...r roller Fluorinated iron roller ø40 IH coil 700 1300W Pressure roller Silicon sponge roller Surface PFA tube Fuser belt PFA tube belt ø60 Separation roller Ceramic roller ø20 2 Oil roller method Oil roller ø18 Cleaning roller ø16 3 ON OFF control and power control by thermistor 4 IH coil Discharge brush Separation roller Sponge roller ø20 Process e STUDIO3511 4511 e STUDIO281c 351c 451c ...

Page 106: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 3 16 ...

Page 107: ...STUDIO281c 351c 451c GENERAL OPERATION 4 1 4 GENERAL OPERATION 4 1 Overview of Operation Operation of equipment Operation during initializing pre running and ready Copying operation Drawer feed copying by the START button Bypass feed copying Interrupt copying ...

Page 108: ... The carriage moves to the home position The carriage moves to the peak detection position The exposure lamp EXP is turned ON Peak detection white color is detected by the shading correction plate The exposure lamp EXP is turned OFF The poligonal motor M4 rotates in low speed READY WARMING UP is displayed 2 Pre running operation Pre running operation is started when the temperature of the fuser be...

Page 109: ...eed clutch CLT2 turned ON Pickup roller feed roller separation roller and transport roller start to rotate Paper reaches the upper drawer feed sensor S23 Upper drawer feed sensor S23 is turned ON Paper reaches the registration roller Registration sensor S22 is turned ON and aligning is performed Upper drawer feed clutch CLT2 is turned OFF after a certain period of time 3 A certain period of time p...

Page 110: ... developer bias AC and color developer bias turned ON Color developer drive clutch CLT9 turned ON Transfer belt cleaner clutch CLT1 and transfer belt cleaner auger motor M2 turned OFF 1st transfer cyan image Cyan image is transferred to the transfer belt Color developer bias AC color developer drive clutch CLT9 and color developer bias turned OFF Revolver motor M12 turned ON Revolver rotates 120 d...

Page 111: ...ive clutch CLT10 and black developer bias AC turned ON 1st transfer black image Black image is transferred to the transfer belt 2nd transfer roller contact clutch CLT10 and 2nd transfer bias turned ON Contact the 2nd transfer roller to the transfer belt The image on the transfer belt is transferred to the paper Black developer bias AC turned OFF Black developer lifting clutch CLT11 turned ON and b...

Page 112: ...tch Black developer lifting clutch 2nd transfer roller contact clutch Upper drawer feed clutch Upper drawer feed sensor PVDEN signal Revolver motor Registration sensor 2nd transfer bias Transport motor Registration clutch Exit sensor 5ms ck 12 236 696 494 658 599 13870 12741 13799 14930 13426 19664 17964 16896 14044 12892 3048 3048 5544 5544 2945 5688 6048 8560 5792 8816 11284 11540 14060 14168 21...

Page 113: ... developer drive clutch Black developer lifting clutch 2nd transfer roller contact clutch Upper drawer feed clutch Upper drawer feed sensor Revolver motor Registration sensor 2nd transfer bias Transport motor Registration clutch Exit sensor ms 5ms ck PVDEN signal 12 236 695 489 658 600 7260 7260 4032 4566 4866 4942 3884 5009 6073 8956 2124 2124 2020 6408 6412 6556 10600 3290 2310 11400 0 795 1988 ...

Page 114: ... feed roller and separation roller start to rotate Aligning operation Paper reaches the registration roller After a certain period of time the bypass feed clutch CLT6 turned OFF 4 Hereafter operations 3 through 6 of 4 2 3 Drawer feed copying are repeated 4 2 5 Interruption copying 1 Press the INTERRUPT button LED INTERRUPT is turned ON Copying operation in progress is temporarily stopped and the c...

Page 115: ...type of abnor mality are displayed 4 3 1 Types of abnormality 1 Abnormality cleared without turning OFF the door switch A Add paper B Paper misfeed in bypass 2 Abnormality not cleared without turning OFF the door switch C Misfeed in equipment D No toner in the cartridge E Developer unit not installed properly F Toner bag replacement 3 Abnormality not cleared without turning OFF the main switch G C...

Page 116: ...ks When the drawer is selected START button is disabled When the power is turned ON or LCF drawer is inserted When the power is turned ON or equip ment PFP drawers are inserted LCF performs initialization Detects the presence of paper Tray up motor ON The tray goes up At this time the tray up sensor and LCF empty sensor are OFF When the tray up sensor is not turned ON in a fixed period of time it ...

Page 117: ...g the copying in spite of the tray up sensor is ON It is judged that there is no paper Drawer area of the control panel blinks When the drawer is selected The copying operation is stopped During bypass feeding Bypass feed clutch CLT6 is turned ON Registration sensor S22 is turned ON Registration sensor S22 is not turned ON in a fixed period of time E120 Bypass misfeeding Bypass misfeed symbol is d...

Page 118: ... Exit sensor S40 turned OFF If the exit sensor S40 is not turned OFF after approx 1 3 seconds Paper jam E020 The copying operation is stopped Immediately after the power ON Any of all sensors on paper transport path detects paper ON Paper jam E030 Front cover is opened during copying Paper jam E410 Registration sensor S22 detects jamming of the leading edge of paper The registration sensor S22 is ...

Page 119: ... is not turned ON in a fixed period of time after the feed clutch is turned ON Paper jam E220 E310 E320 E340 to E360 E3D0 and E3E0 Error code defers depending on the paper source Toner density becomes low Auto toner sensor S10 S13 detects the absence of the toner Control circuit Install new toner cartridge is displayed the copying operation disabled Solution Open the front cover and replace the to...

Page 120: ... control panel when Call for service appears and handle the abnormality in reference to the error code table in Service Handbook Dispose of used toner is displayed Toner bag full detection sensor S20 is turned ON during printing Printing is stopped after the paper being printed is exited Solution Replace the toner bag with new one and close the front cover ...

Page 121: ...r ON ADU entrance exit sensor ON Color toner sensor abnormal Revolver home position detected Revolver initialization finished Image quality control finished propery Home position detected Peak detected Upper drawer feed sensor ON Lower drawer feed sensor ON YES NO IH coil ON Fans ON E030 NO NO NO NO YES YES YES YES C260 YES CF50 NO CEA0 NO CE10 CE20 CE40 CE50 CE90 NO NO NO NO YES YES YES YES C270 ...

Page 122: ...rvice Call for service Call for service IH coil broken Polygonal motor condition abnormal Fuser belt ready for pre running Fuser belt reached ready temp IH error C410 C430 C440 CA10 C470 C480 C490 YES YES YES YES NO NO NO NO Transport motor ON Tray up motor ON Main motor OFF Revolver motor OFF Transport motor OFF Tray up motor OFF IH coil OFF YES YES NO NO ...

Page 123: ...rum cleaner brush motor ON Polygonal motor high speed rotation ON Transport system control Scanner system control Feed clutch ON Exposure lamp ON Carriage moves forward Carriage stopped Exposure lamp OFF Carriage moves backward Carriage stopped Feed clutch OFF Registration clutch OFF Polygonal motor normal rotation Color printed Remaining set number 0 Exit sensor check leading edge NO YES NO YES Y...

Page 124: ... belt cleaner auger motor ON Transfer belt cleaner clutch OFF Transfer belt cleaner auger motor OFF Laser emission magenta image Revolver motor ON Revolver motor ON Laser emission yellow image Laser emission black image Black developer lifting clutch ON Black developer bias 150 ON Transfer belt cleaner clutch ON Toner recovery auger ON Drum cleaner brush ON Discharge LED ON Cleaning blade bias ON ...

Page 125: ... roller contact clutch OFF 2nd transfer bias OFF Laser emission black image 1st transfer black image Transfer belt cleaner clutch OFF Transfer belt cleaner auger motor OFF 1st transfer bias OFF Black developer lifting clutch ON Black developer bias 150 ON Transfer belt cleaner clutch ON Toner recovery auger ON Drum cleaner brush ON Discharge LED ON Cleaning blade bias ON Transfer belt cleaner auge...

Page 126: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 4 20 ...

Page 127: ... The control panel consists of button switches and touch panel switches to operate equipment and select various modes and LEDs and an LCD to display the state of the equipment or the messages When the operator s attention is required graphic symbols appear with messages explaining the condi tion of the equipment in the LCD panel Fig 5 1 ...

Page 128: ... CONTROL PANEL 5 2 5 2 Items Shown on the Display Panel 5 2 1 Display 1 Basic display Displays buttons and messages Fig 5 2 2 Paper jam display Displays error code paper jam position and paper jam release guidance Fig 5 3 Paper jam release guidance Paper jam position Error code ...

Page 129: ...5 2005 2008 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c CONTROL PANEL 5 3 3 Service call display Displays error code and service call symbol Fig 5 4 Service call symbol Error code ...

Page 130: ...errupted Press START button to resume copying or press MEMORY CLEAR button to delete the job 10 READY WARMING UP Scanner warming up Ready to scan the original 11 READY PRINTING Printing out the data Scanning is enabled 12 READY ADDING TONER Supplying toner Scanning is enabled 13 READY INNER TRAY FULL Inner tray in the equipment is full Scanning is enabled When the bridge unit is installed Resumes ...

Page 131: ...this media type Displayed when the paper size which is not specified for the functions such as stapling or hole punching is set 35 Copy size A4 LT only Displayed when the paper size which is not specified for Book type duplex copying or Dual page is set 36 Copy size A4 LT and A4 R LT R Displayed when the paper size which is not specified for Rotate Sort 37 CHANGE DRAWER TO CORRECT PAPER SIZE Displ...

Page 132: ... the saddle stitch unit Finisher is full of papers 54 Examine stapler Trouble in the stapler unit in finisher 55 Check staple cartridge No stapler in finisher section 56 Check staple cartridge in the saddle stitch unit No stapler in saddle stitch unit 57 Job interrupted job 1 saved Interrupt copying is accepted 58 Ready to resume job 1 Interrupt copying is cancelled finished 59 Cannot use AMS mode...

Page 133: ... black toner in the cartridge Displayed when black toner is run ning out even if other toner still remain Copying not enabled 74 Install new Yellow toner cartridge No yellow toner in the cartridge Black copying is available Other button functions are available 75 Install new Magenta toner cartridge No magenta toner in the cartridge Black copying is available Other button functions are available 76...

Page 134: ... the panel 85 Call for service Displayed when motor sensor switch etc do not work properly Turn OFF the power and solve the problem then turn ON the power 86 Please try again after a while Displayed when the Department Code can no be keyed in immedi ately after power ON Leave it for a while and key in the code again 87 Set standard size Displayed when the paper size which is not acceptable is set ...

Page 135: ...tops and READY Press START to copy and MEMORY CLEAR are displayed Press CLEAR button after set ting the copy mode Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Display not changed Display not changed Press CLEAR button after key ing in numbers digital ke...

Page 136: ...t changed Press FUNCTION CLEAR button after setting the copy mode Copy mode is cleared after the copy mode is set Display not changed Copy mode is cleared after the copy mode is set Displays BASIC screen after the copy mode is set and then cancelled Display not changed Press STOP button Printing out stops and READY Press START to copy and MEMORY CLEAR are dis played Display not changed Display not...

Page 137: ...hanged Press TEMPLATE button Displays TEM PLATE screen Display not changed Display not changed Displays TEM PLATE screen Display not changed Press USER FUNCTIONS button Displays USER FUNCTIONS screen Display not changed Display not changed Displays USER FUNCTIONS screen Display not changed Press HELP button Displays HELP screen Display not changed Displays HELP screen Switches to the screen previo...

Page 138: ... an STN blue mode transmissive type LCD with 640x240 dot display capacity It consists of a driver LSI frame printed circuit board and lateral type CCFL backlight STN Super Twisted Nematic CCFL Cold Cathod Fluorescent Lamp 2 Block diagram Fig 5 6 640 x 240 dots IC1 XSCL UD0 UD1 UD2 UD3 WF LP VDD GND V0 VEE Power supply LCDEN IC2 LCD panel 640 x 240 dots IC3 IC4 160 160 160 160 IC5 120 IC6 120 ...

Page 139: ... System board are received by the LCD controller and then displayed on the LCD The LED and buzzers are switched to ON OFF with the signals output from the panel process ing CPU based on serial data transmitted from the System control PC board Fig 5 7 4 Data Transmission Fig 5 8 Inverter for backlight Contrast adjustment circuit LCD display 640 x 240 dots LCD controller Analog input LED driver Buzz...

Page 140: ...en the LDON 0 signal becomes L level Also when LED driver pin changes to L the current flows from 5VL via the transistor to the LED COPY to turn ON the LED COPY a The transistor Q3 connected to the LED anode is ON b The output from the cathode side of the LED is L level The LED turns ON when the conditions a and b are met Conditions to turn ON the LED LDON0 L L Q3 LED driver COPY 5VL LED G Current...

Page 141: ...ONTROL PANEL 5 15 5 5 Disassembly and Replacement A Stopper Note When taking off the control panel check the position of the stopper if the stopper is at the position b remove the stopper or move it to the position a Fig 5 10 1 Slide the stopper and pull it out Fig 5 11 b a Stopper ...

Page 142: ...over and the front upper cover P 2 28 H Right upper cover P 2 27 G Front upper cover 2 Disconnect 1 connector 3 Remove 2 screws and take off 2 harness clamps Fig 5 12 4 Lower the control panel and remove 4 screws 5 Take off the control panel unit while sliding it Fig 5 13 6 Remove 3 screws and take off the cover Fig 5 14 Control panel unit Cover ...

Page 143: ...c CONTROL PANEL 5 17 7 Remove 5 screws and take off the hinge bracket Fig 5 15 8 Disconnect 5 connectors 9 Release the harness from 2 harness clamps 10 Remove 1 screw and take off the DSP board Fig 5 16 11 Remove 4 screws and take off the LCD Fig 5 17 Hinge bracket DSP board LCD ...

Page 144: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 5 18 12 Remove 16 screws and take off the KEY board Fig 5 18 KEY board ...

Page 145: ...which then undertakes various corrective processes necessary for image formation After that arithmetic operation is performed on the digital signal which is then transmitted to the data writing section In this equipment a reduction type CCD for color processing is used What this CCD differs from black and white CCDs is that its devices are arranged in 4 lines and covered with color filters Red Gre...

Page 146: ...r board INV Reflector Mirror 1 Carriage 2 Mirror 2 Mirror 3 Lens unit CCD driving PC board CCD Automatic original detection sensor S1 5 Driving section Scan motor M1 2 phase stepping motor Wire drive Driving the carriage 1 and carriage 2 Other Scanning section control PC board SLG Scanner unit cooling fan M15 Damp heater DH1 DH2 THMO2 Carriage home position sensor S6 Platen sensor S7 Main switch S...

Page 147: ...hen cleaning the surface of the ADF original glass because it is coated so as not to be scratched by originals 2 Carriage 1 Carriage 1 consists of the exposure lamp EXP Inverter board INV reflector mirror 1 etc It is driven by the scan motor M1 and scans an original on the glass Fig 6 2 Exposure lamp EXP This lamp is the light source to irradiate the original on the glass One 16 W xenon lamp Inver...

Page 148: ...the CCD placed at the focal point of the lens which is fixed in a position 5 CCD driving PC board CCD Processes such as signal amplification signal integration and A D conversion are applied on the electrical signal which was converted by CCD Fig 6 5 6 Scanning section control PC board SLG This is a board to perform the image correction such as the shading correction and 3 line correc tion and con...

Page 149: ...tions The home positions are detected when the carriage 1 passes the home position sensor S6 When the START button is pressed the both carriages start to move and scan the original on the glass Scanning of an original placed on the RADF The carriage 1 stays at the shading position during shading correction and at the scanning posi tion during scanning operation Scanning velocity The scanning veloc...

Page 150: ...rmal operation Excited L Excitation drive is forcibly shut off Not excited Voltage to set value for the motor current SCNREF Inpu t Motor wire current value is set in the range of 0 to 2 0 A phase by applying the analog voltage 0 to 5 V Set the exicitation for the motor current SCNMD1 to 3 Inpu t Set the excitation mode Reset RESET Inpu t Reset for the whole system Internal circuit of the driver i...

Page 151: ...ES NO YES NO YES NO Power ON Carriage home position sensor ON Carriage home position sensor OFF Carriage home position data set Moving peak detection position Peak detection Scanning command Completion of initialization Moving carriage waiting position Scan motor rotating Moves to the forward direction of carriage Carriage home position sensor ON Error handling Scan motor rotating Moves to the bac...

Page 152: ...cuit converts the reflected light amount from the original surface and the shading correction plate to electrical signals The exposure amount is controlled in two ways White reference formation reads the reflected light amount from the white shading correction plate Black reference formation reads the light amount at the regulation position with the exposure lamp EXP lights OFF Fig 6 9 CCD board C...

Page 153: ...d over the pipe Fig 6 10 2 Behavior inside the lamp The electron inside the pipe is led to the electric field by applying voltage to the pair of the external electrodes and discharge is started Electrons then flow and clash with the xenon atom inside the pipe to excite them and generate the ultraviolet ray This ultraviolet ray converts the fluorescer into the visible light Fig 6 11 PET film Alumin...

Page 154: ...s LAMPON L Exposure lamp ON signal Lamp turns ON at L 5VSWON L H 5VSW ON signal Controls 5VSW by CPU Normally L WDTOUT H L Watchdog timer signal L is output when CPU is out of control LMPEN L H Exposure lamp enable signal Normally L Xenon lamp O N OFF Inverter board Exposure lamp Scanner CPU SLG board LMPON 5VSWON WDTOUT 5VSW RN2401 RN1401 24V LMPEN LAMP LAMP ...

Page 155: ...ls in the even number and odd number elements are separated and output in parallel via two channels Fig 6 13 6 6 2 Shading correction Signal voltages read by the CCD have the following characteristics 1 Light source has a variation in its light distribution 2 Since the light beam reflected from the original is converged using a lens the light path is the short est at the center of the CCD and the ...

Page 156: ...ase frame of the scanner unit as shown in the figure below Each sensor consists of an infrared Light Emitting Diode LED on the light emitting side and a phototransistor on the light receiving side When there is an original on the original glass light beams from the LEDs are reflected by the original and led to the phototransistors This means that the presence of the original is detected by the pre...

Page 157: ...eflected from the original and if one of the matrix conditions shown in 4 for original sizes are met the size of the original is instantly detected 3 The output signal from each sensor is input to CPU on the scanning section control PC board to determine the size of the original Fig 6 15 Sensor detection points SLG board APS C APS 3 APS 2 APS R Scanner CPU VDD VDD GND GND SLG board APS C APS 2 APS...

Page 158: ...c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 14 A4 Series Fig 6 16 LT Series Fig 6 17 A5 B5 A4 B4 A3 A5 R A4 R B5 R APS R APS C APS 3 APS 1 APS 2 ST LT LG LD ST R LT R APS R APS C APS 3 APS 1 ...

Page 159: ...cognized or no original state until new paper size is recognized No original Output from all the sensors are H Reproduction ratio and paper are not selected Size change is always observed and detected The carriage 1 stays at the standby position even if the reproduction ratio changes correspond ing to the change of the original size When the platen sensor S7 is ON The latest original size or no or...

Page 160: ...ode and a phototransistor It uses pulse modulation to detect an original Fig 6 18 The light emitting diode is driven by a pulse having a 130 µsec cycle and an 8 µsec ON time When the phototransistor receives the same signal as this pulse it is determined that there is an original The pulse modulation is performed inside the reflection type phototransistor 130 µsec LED Phototransistor Original 8 µs...

Page 161: ...ws and take off the fixing bracket Fig 6 19 3 Take off the original glass Note When installing fit 2 small protrusions of the original glass in the groove of the equipment and fix the original glass with the fixing bracket by pushing it to the left rear direction Fig 6 20 1 Take off the original glass P 6 17 A Original glass 2 Disconnect 1 connector remove 6 screws and take off the lens cover Fig ...

Page 162: ...series APS 1 2 3 C R C 2 LT series APS 1 3 C R 1 Take off the original glass P 6 17 A Original glass 2 Disconnect 1 connector and remove 1 screw for each APS sensor Take off 5 APS sen sors Fig 6 22 1 Take off the original glass P 6 17 A Original glass 2 Disconnect 1 connector and remove 1 screw for each APS sensor Take off 4 APS sen sors Fig 6 23 ...

Page 163: ...Original glass P 2 27 G Front upper cover 2 Move the carriage 1 to the center position Fig 6 24 3 Disconnect the connector of the exposure lamp Note When disconnecting the connector pay attention not to give load to the carriage frame 4 Release the harness from the harness clamp Fig 6 25 5 Move the carriage 1 to the position where the side of the frame is cut out Fig 6 26 ...

Page 164: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 20 6 Remove 1 screw 7 Lift up the front side of the exposure lamp and take off by sliding it Fig 6 27 Exposure lamp ...

Page 165: ...s then take off the lens unit Notes 1 When installing the lens unit fix it while pushing it to the rear direction 2 For adjustment refer to 3 9 2 Lens Unit in the Service Handbook 3 Do not touch 6 screws shown with the arrows when replacing the lens unit 4 Handle the unit with care Do not touch the adjusted area and lens Hold the unit as the right figure Fig 6 28 Fig 6 29 Fig 6 30 Lens unit ...

Page 166: ...emove 3 screws and take off the scan motor with the whole bracket Fig 6 32 Notes When installing the scan motor use the belt tension jig spring The procedure is as fol lows 1 Fix the screw A P 6 22 Fig 6 32 2 Temporarily fix the screw B and C P 6 22 Fig 6 32 3 Hook the belt tension jig to the motor bracket and the flame 4 The scan motor is pulled by the belt ten sion jig Fix the screw B and then C...

Page 167: ...nal glass P 2 32 T Upper rear cover P 2 27 G Front upper cover 2 Move the carriage and position the holes of the carriage to the holes of the frame 3 Remove 2 screws and take off the brackets fixing the carriage 1 to the wire Fig 6 34 4 Remove the square seal fixing the lamp har ness to the base Disconnect the connector of the lamp harness from the SLG board Fig 6 35 Connector Seal 07 03 ...

Page 168: ...lamp harness with the position as shown in the figure and fix it with a seal 4 After the installation move carriage 1 towards the left and confirm that there is no abnormality in the lamp harness such as twisting Fig 6 36 Fig 6 37 5 Rotate the carriage 1 in the direction shown in the figure at right not to touch the mirror Then take off the carriage 1 Note When replacing the mirror 1 replace the c...

Page 169: ... push it to the end and fix securely Fig 6 39 1 Take off the carriage 1 P 6 23 G Carriage 1 2 Disconnect 2 connectors Remove 2 screws and take off the inverter board Fig 6 40 1 Take off the carriage 1 P 6 23 G Carriage 1 2 Attach the wire holder jigs to the pulleys to prevent the wires from loosening Note Refer to 3 9 Adjustment of the Scanner Sec tion in the Service Handbook for the direc tion of...

Page 170: ... Notes 1 When replacing the mirrors 2 and 3 replace the carriage 2 together with mir rors 2 and 3 Mirrors 2 and 3 should not be removed 2 When installing carriage 2 fix the bracket temporarily at the position A Then move it to the direction B push it to the end and fix securely P 6 25 Fig 6 39 Fig 6 43 1 Take off the upper rear cover P 2 32 T Upper rear cover 2 Disconnect 1 connector Release the l...

Page 171: ... off the lens cover P 6 17 B Lens cover 2 Disconnect 8 connectors remove 6 screws and take off the SLG board Fig 6 45 1 Take off the upper rear cover P 2 32 T Upper rear cover 2 Disconnect 1 connector Release the har ness from the harness clamp Remove 2 screws and take off the scanner unit cooling fan Fig 6 46 SLG board Scanner unit cooling fan ...

Page 172: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 28 ...

Page 173: ...ng gamma correction gradation processing compression expansion and black component generation PRT SCN Scanner high quality image processing printer high quality image pro cessing black over print pure black pure gray chroma adjustment and brightness adjustment LGC board Smoothing processing image area control and laser related control Image processing section Writing section Original Original glas...

Page 174: ...g correction correction of variance in CCD elements and the light source is performed and the digital signal is output as an image signal from the scanning section Fig 7 2 The image processing section inputs the image signal from the scanning section and applies various image processing on the signal then transmits the output result to the writing section Images are processed by the SYS board and ...

Page 175: ...on Page memory control Scanner Printer Controller Black over print Pure black Pure gray Chrome adjustment Brightness adjustment ACS Color conversion Black component generation High quality image processing Image memory editing Editing processing Rectangular are signal generation Editing processing Gamma correction Gradation processing Compression expansion Scanner high quality image processing Pri...

Page 176: ...adjustment PCL5C Brightness adjustment PCL5C 7 3 2 Functions of image processing circuit The image processing section on the SYS board realizes the followings 1 ACS Auto Color Selection This function determines whether the original to be scanned is colored or monochrome based on the analysis of the R G and B signals output from the CCD 2 Color conversion CMY image data processing When functioning ...

Page 177: ...are determined to be text they are further judged whether they are black or color text using the differences in the levels of CMY signals Filtering This function is enabled by low pass filter processing and high pass filter processing Low pass filter processing This processing removes image electrical noise and decreases moire by performing averaging operation between the image signals of the targ...

Page 178: ...between the targeted pixel and the neighboring pixels to eliminate this phenomenon and realize high reproducibility of original Fig 7 6 5 Image memory editing This function performs editing such as enlargement reduction mirror imaging etc by using a line memory Pixel data for one line in the primary scanning direction is stored in the line memory and the memory is renewed at each line Enlargement ...

Page 179: ... match with the copy mode 9 Gradation processing In case of color copying this function switches the type of gradation processing depending on the copy mode A type which selects the printer characteristics giving the priority to resolution such as for text data and another which selects the printer characteristics giving the priority to reproducibility of gradation such as for photographic images ...

Page 180: ...a formed as a part of the text or the graphic object on the printer data Fig 7 7 14 Pure black Pure gray Post Script Pure gray PCL5C This function is to printout the text and graphics formed as black data with black toner only on the printer data not using 4 color toner The gray text graphics are also printed out with black toner only 15 Chroma adjustment PCL5C This function adjusts chromaticness ...

Page 181: ...ollowings Smoothing processing Image area control Laser related control 7 4 2 Functions of image processing circuit An image processing ASIC mounted on the LGC board enables the following functions 1 Smoothing processing This function removes jaggy and smoothes character outline of images and output them 2 Image area control This function sets the effective image area in horizontal and vertical di...

Page 182: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved IMAGE PROCESSING 7 10 ...

Page 183: ...the digital image signals transmitted from the scanner USB network etc to create the latent image Image signal is converted into the light emission signal of the laser diode on the laser driving PC board LDR then radiated on the drum through the optical elements such as cylinder lenses polygonal mirror and fθ lens The unit must not be disassembled in the field as they are very sensitive to dust an...

Page 184: ...c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 8 2 Fig 8 2 Mirror Polygonal motor Cylinder lens Aperture LDR board Slit glass for outgoing laser beam SNS board Finite focus lens f lens 1 f lens 2 ...

Page 185: ...cal unit 1 beam Laser emission unit Laser diode Wavelength Approx 785 nm Output power rating 10 mW Fine focus lens Aperture Cylinder lens Laser driving PC board LDR Polygonal motor unit Polygonal motor M4 Polygonal mirror 8 planes Polygonal mirror cover fθ lens 1 fθ lens 2 Mirror Slit glass H sync signal detection PC board SNS ...

Page 186: ...h other than the specified manuals because you could be exposed to the laser radiation The laser unit is completely sealed with a protective cover As long as only the operations of specified manuals are performed the laser beam is not leaked and you are in no danger of being exposed to laser radiation The following cautionary label for the laser is attached to the left inner cover Fig 8 3 Cautions...

Page 187: ...cted by this mirror As the polygonal mirror is rotated by the polygonal motor M4 the reflected laser light moves in sync with the rotation The direction of the movement is the primary scanning direction of the image One scan is performed on one plane of the polygo nal mirror As the polygonal mirror has eight planes eight scans are performed in one rotation of the polygonal mirror c Polygonal mirro...

Page 188: ...al unit and it protects the unit from dust a Uniform velocity scanning Since the polygonal mirror is rotating at a uni form velocity the laser beam reflected from the mirror scans over the drum surface at a uniform angular velocity namely the pitch between the dots on the drum is wider at both ends than at the center of the scanning range The fθ lenses help to correct this difference making all th...

Page 189: ...semiconductive laser is decreased as the temperature of the laser rises APC control needs to be performed to maintain a constant optical output Fig 8 7 The following diagram shows a block diagram of the semiconductive laser control circuit The semicon ductive laser performs monitor efficiency regulation a process to control monitor current for the light amount and laser itself is adjusted to initi...

Page 190: ...05 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 8 8 8 4 Laser Unit Cooling Fan The laser unit cooling fan is a propeller fan 80 x 80 mm It cools down the polygonal motor and the Laser driving PC board LDR ...

Page 191: ...trol signal The polygonal motor M4 is a DC motor which is PLL controlled by clock signal The signals from LGC board controls the polygonal motor M4 Signal Level L Level H Remarks POMON ON OFF Polygonal motor ON OFF signal POMCK Polygonal motor reference clock signal POMPL Locked Unlocked Polygonal motor PLL signal LGC board Polygonal motor POMON 24V 5 1V POMCK POMPL Gate array 1 ...

Page 192: ...signal is then laser controlled and written on the drum 1 Setting of effective image area Top bottom left and right margins 2 Horizontal synchronization signal HSYNC clock generation section Reference clock signal in the printer section synchronized with HSYNC and its signal 3 Laser drive section ON OFF control of the semiconductive laser and APC Auto Power Control APC Adjusts disparity of the las...

Page 193: ...r optical unit 1 Take off the rear cover 2 P 2 32 S Rear cover 2 2 Take off the LGC board cover P 2 37 E LGC board LGC 3 Disconnect 2 connectors from the LGC board Fig 8 10 4 Release the harnesses from the harness clamp Fig 8 11 5 Take off the left cover P 2 29 K Left cover 6 Remove 2 screws and take off the toner cover Fig 8 12 Toner cover ...

Page 194: ...dle the unit with extra care not to shock or vibrate it 3 Do not disassemble the unit in the field since it is very sensitive to the dust and stain Fig 8 13 1 Take off the inner tray P 2 26 C Inner tray 2 Take off the front lower cover P 2 26 E Front lower cover 3 Take off the left cover P 2 29 K Left cover 4 Remove 2 screws and take off the left inner cover Fig 8 14 5 Disconnect 1 connector and r...

Page 195: ...otor M6 Photoconductive drum Transfer belt Transport motor M9 Fuser unit Bridge unit option 2nd transfer roller Registration roller Transport roller Feed roller Bypass feed roller Revolver motor M12 Revolver unit Developer motor M11 Black developer unit Color developer unit Transfer belt cleaner clutch CLT1 ADU motor M5 ADU Exit motor M7 Exit roller Toner motor M3 Black toner cartridge Drum cleane...

Page 196: ...photoconductive drum and the transfer belt and another part transmits the drive from the drum cleaner brush motor M8 to the drum cleaner brush The drive to the photoconductive drum and transfer belt are transmitted by the gears and the coupling The main motor M6 is a brushless DC motor Fig 9 1 G10 G80 G72 G150 G84 G32 G27 G20 G40 G23 Coupling Drum G252 Coupling G10 Transfer belt Transfer belt clea...

Page 197: ...quency output at the main motor M6 The speed is lowered to the range from 1 2 to 1 3 at the Thick Paper OHP Film Mode This switching is performed between the completion of the 1st trans fer and that of the 2nd transfer Signal Level L Level H Remarks MAMON ON OFF Main motor ON signal MAMBK Braking Normal Main motor brake signal MAMCW CW CCW Main motor rotational direction signal MAMGA Low speed Hig...

Page 198: ...ort motor M9 to the fuser unit 2nd transfer roller registration roller transport roller feed roller bypass feed roller and bridge unit option through the gears and clutches Fig 9 3 G10 Transport motor gear G64 G30 G22 G30 G30 G22 G24 G35 G21 G30 G25 G14 G23 G28 G17 G28 Registration clutch G28 G32 G35 G28 G25 Upper transport clutch High speed G31 G38 G28 Upper transport clutch Low speed G27 G28 G25...

Page 199: ... is the block diagram of the transport motor M9 Fig 9 4 Signal level of motor circuit FDMCW rotational direction signal The motor does not rotate backward CCW in actual move ment Signal Level H Level L Remarks FDMON OFF ON Transport motor ON signal FDMCW CCW CW Transport motor rotational direction signal FDMGA High speed Low speed Transport motor speed switching signal FDMCK Transport motor refere...

Page 200: ...ment is performed by drive transmission from the developer motor M11 through the gears and clutches The revolver unit contains three color developer units The developer motor M11 drives the color developer unit only at the developing position it means each developer unit does not have its own drive When the revolver rotates the clutch turns OFF so that the drive of the developer motor M11 will not...

Page 201: ...G20 G20 G21 G15 G27 G17 G19 G27 G21 Mixer R Mixer F 1 Black developer lifting clutch 2 Color developer toner supply clutch 3 Developer motor 4 Color developer driver clutch 5 Black developer driver clutch 6 Transfer belt cleaner clutch 1 2 3 4 5 6 Mixer 2 Mixer 1 Developer sleeve Color developer Main motor drive unit Black developer unit Developer sleeve G27 G20 G33 G16 G24 G46 G18 G16 G19 G27 G20...

Page 202: ... stops 2 DVMCW signal controls the rotational direction of the motor The motor rotates forward CCW but does not rotate backward CW in actual movement Namely DVMCW signal is always output level H Signal level of motor circuit Signal Level L Level H Remarks DVMON ON OFF Developer motor ON signal DVMCW CW CCW Developer motor rotational direction signal DVMCK Developer motor reference clock signal DVM...

Page 203: ...r cover 2 2 Take off the LGC board case P 2 38 F LGC board case 3 Take off the SYS board case P 2 35 D SYS board case 4 Take off the switching regulator unit P 2 39 G Switching regulator unit 5 Remove 3 screws and take off the flywheel Fig 9 7 6 Remove 2 screws and take off the bracket Fig 9 8 7 Open the mylar sheet 8 Release the harness from 2 harness clamps Fig 9 9 Flywheel Bracket Mylar sheet ...

Page 204: ... reserved DRIVE SYSTEM 9 10 9 Remove 3 screws and take off the bracket Fig 9 10 10 Disconnect 3 connectors and release the harness from 2 harness clamps Fig 9 11 11 Remove 5 screws and take off the developer motor drive unit Fig 9 12 Bracket Developer motor drive unit ...

Page 205: ...drive unit 2 Remove 4 screws and take off the developer motor Fig 9 13 1 Take off the developer motor P 9 11 B Developer motor M11 2 Remove 5 screws and take off the bracket Fig 9 14 3 Disconnect 1 connector remove 1 bushing and 1 gear and then take off the black devel oper lifting clutch Note Place the stopper when installing the clutch Fig 9 15 Developer motor Bracket Connector Bushing Gear Blac...

Page 206: ...motor P 9 11 B Developer motor M11 2 Release the harness from 3 harness clamps Fig 9 16 3 Remove 1 clip and1 bushing 4 Remove 4 screws and take off the bracket Fig 9 17 5 Disconnect 1 connector remove 1 gear 2 bushings and 1 clip and then take off the color developer toner supply clutch Note Place the stopper when installing the clutch Fig 9 18 Bracket Clip Bushing Gear Bushing Bushing Clip Connec...

Page 207: ...opper when installing the clutch Fig 9 19 7 Remove 5 screws and take off the bracket 8 Remove 1 clip and 1 gear Fig 9 20 9 Remove 1 clip and 1 bushing Remove 1 gear 10 Disconnect 1 connector and take off the color developer drive clutch Note Place the stopper when installing the clutch Fig 9 21 Gear Bushing E ring Connector Black developer drive clutch Gear Clip Bracket Gear Connector Clip Bushing...

Page 208: ... 2 31 P Right rear hinge cover 4 Take off the SYS board case P 2 35 D SYS board case 5 Remove 3 screws and take off the flywheel 6 Take off the IH board case P 16 34 N IH board IH IH board case 7 Take off the ozone exhaust fan with the ozone exhaust duct P 11 24 R Ozone exhaust fan M18 8 Remove 1 screw and take off the bracket Fig 9 22 9 Remove 1 screw and take off the cover plate Fig 9 23 10 Remo...

Page 209: ...EM 9 15 11 Take off the fuser unit P 16 19 A Fuser unit 12 Remove 1 screw and take off the bracket Fig 9 25 13 Loosen 1 setscrew and disconnect 1 connec tor 14 Release the harness from 1 harness clamp Fig 9 26 15 Take off the registration clutch Fig 9 27 Bracket Setscrew Registration clutch ...

Page 210: ... clutch as shown in the right hand figure Fig 9 28 16 Disconnect 1 connector remove 2 screws and take off the bracket Fig 9 29 17 Loosen 1 setscrew take off the upper trans port clutch High speed with the gear Note Do not mix up the registration clutch and upper transport clutch High speed when installing them Fig 9 30 0 Bracket Connector Setscrew Gear Upper transport clutch High speed ...

Page 211: ... 351c 451c DRIVE SYSTEM 9 17 18 Disconnect 2 connectors and release the harness from 3 harness clamps Fig 9 31 19 Remove 5 screws and take off the transport motor drive unit Fig 9 32 20 Remove 2 screws and take off the bracket Fig 9 33 Transport motor drive unit Bracket ...

Page 212: ... upper transport clutch Low speed Fig 9 34 22 Remove 9 screws and take off the cover of the transport motor drive unit Fig 9 35 1 Take off the ozone exhaust fan with the ozone exhaust duct P 11 24 R Ozone exhaust fan M18 2 Disconnect 1 connector 3 Release 1 lock support remove 2 screws and take off the transport motor Fig 9 36 Bushing Clip One way clutch Gear Bushing Upper transport clutch Low spe...

Page 213: ... P 16 34 N IH board IH IH board case 7 Take off the ozone exhaust fan with the ozone exhaust duct P 11 24 R Ozone exhaust fan M18 Note Steps 2 to 7 can be omitted if the devel oper motor drive unit and the transport motor drive unit are already taken out 8 Disconnect 2 connectors and release the harness from 2 harness clamps 9 Remove 6 screws and take off the main motor drive unit Fig 9 37 10 Remo...

Page 214: ...bearing 1 clip and 1 bushing Remove 5 screws and take off the gear cover Fig 9 41 1 Take off the rear cover 2 P 2 32 S Rear cover 2 2 Take off the LGC board case P 2 38 F LGC board case 3 Take off the SYS board case P 2 35 D SYS board case 4 Disconnect 1 connector remove 4 screws and take off the main motor Fig 9 42 Bracket Gear cover Clip Bushing E ring Bearing Connector Main motor ...

Page 215: ...4 registration sensor S22 and drive system for these components The transport motor M9 drives the above rollers Refer to chapter 9 for more details about the transport motor M9 and its drive system Fig 10 1 No Name No Name 1 Bypass feed roller 10 Lower drawer pickup roller 2 Bypass separation roller 11 Bypass paper sensor S35 3 Bypass pickup roller 12 Registration sensor S22 4 Upper drawer feed ro...

Page 216: ... sensor S29 30 Drawer paper stock sensor S31 32 Bypass unit Bypass pickup roller PM parts Bypass feed roller PM parts Bypass separation roller PM parts Bypass paper sensor S35 Bypass feed sensor S36 Bypass pickup solenoid SOL3 Bypass tray slide guide width detec tion PC board SFB Bypass feed clutch CLT6 Registration roller Transport roller Registration clutch CLT12 Transport clutch CLT13 14 15 16 ...

Page 217: ...ushed against the registration roller which aligns the leading edge of the paper Then the registration rollers rotate to transport the paper to the transfer unit 6 Bypass paper sensor S35 This sensor detects if paper is set in the bypass tray If it is bypass feeding always comes before drawer feeding 7 Empty sensor Upper drawer S29 Lower drawer S30 This is a transmissive type sensor and detects th...

Page 218: ...ce The driving force transmitted through the bypass feed clutch CLT6 is transmitted to the bypass feed roller through the shaft and then to the bypass pickup roller through the timing belt The roller is rotated by this driving force Fig 10 2 Transport motor M9 Upper transport clutch CLT13 14 Lower transport clutch CLT15 16 Upper drawer feed clutch CLT2 Lower drawer feed clutch CLT3 Registration cl...

Page 219: ...eparate the sheets being fed The separation roller unit consists of the feed roller separation roller spring joint etc as shown below The feed roller is rotated by the feed clutch in the direction of the white arrow at the same timing as the pickup roller rotation The figure at the bottom of this page shows how duplicate feeding is prevented Since the friction between two sheets is small the lower...

Page 220: ...ime if the empty sensor S29 is OFF L it is judged that there is no paper in the drawer If the empty sensor S29 is ON H there is paper in the drawer The tray stops at raised position regardless of availability of paper The tray up motor M10 then starts to rotate in reverse and the lower drawer is raised The lower drawer is stopped in the same manner as the upper drawer and the empty sensor S30 dete...

Page 221: ...tart feeding paper Passing of the leading edge of the paper turns ON the lower drawer feed sensor S24 then the feed clutch CLT3 and transport clutch high speed CLT14 16 is turned OFF then back ON Passing of the leading edge of the paper turns ON the registration sensor S22 and the paper is aligned by the registration roller The transport clutch high speed CLT14 16 is turned OFF and the transport r...

Page 222: ...gram of TA8428 Fig 10 6 IN1 and IN2 are input terminals to receive the signals from the gate array The control logic based on the signals from the gate array controls ON OFF of the motor rotation direction Input Output Remarks IN1 IN2 M M H H L L BRAKE L H L H CCW H L H L CW L L OFF high impedance STOP 1 2 3 4 5 6 7 IN1 IN2 M TUP1A GND M TUP2A N C Vcc Thermal shut down overcurrent protection circu...

Page 223: ...ke off the right rear hinge covers P 2 31 P Right rear hinge cover 3 Remove 1 screw of ground wires Discon nect 1 connector and release the harnesses from 2 harness clamps Fig 10 7 4 Remove 1 screw M4 12 Open the bypass feed tray and take off the bypass feed front cover Fig 10 8 5 Remove 1 screw Open the bypass feed tray and take off the bypass feed rear cover Fig 10 9 Connector Ground wire Bypass...

Page 224: ...nstalling the bypass unit make sure that the ADU is closed in advance since the bypass unit occasionally does not slide smoothly Fig 10 10 1 Take off the bypass unit P 10 9 A 1 Bypass unit 2 Disconnect 1 connector and release the har ness from the harness clamp Fig 10 11 3 Remove 2 screws and slide the hinge assembly to take it off with the tray Fig 10 12 Bypass unit Connector Tray Hinge assembly ...

Page 225: ...ly from the bypass tray Fig 10 13 1 Take off the hinge assembly P 10 10 A 2 Hinge assembly 2 Remove 3 screws release 4 latches and 3 hooks and take off bypass tray upper cover Fig 10 14 3 Remove 1 screw for the plate spring And remove 1 screw on the tray side and take off the bracket Fig 10 15 Hinge assembly Bypass tray upper cover Plate spring Bracket ...

Page 226: ...Install the bracket so that its pointer is placed at the same position as before Fig 10 16 4 Disconnect 1 connector remove 1 screw and take off the SFB board Fig 10 17 1 Take off the bypass unit P 10 9 A 1 Bypass unit 2 Remove 1 screw and slide the bypass feed upper cover to take it off Fig 10 18 Pointer SFB board Bypass feed upper cover ...

Page 227: ... 12 A 4 Bypass feed upper cover 2 Remove 4 screws and take off the bypass upper guide Fig 10 19 1 Take off the bypass feed upper cover P 10 12 A 4 Bypass feed upper cover 2 Remove 4 screws and take off the upper plate Fig 10 20 3 Remove 1 spring Disconnect 1 connector and take off the bypass pickup solenoid with the solenoid arm Fig 10 21 Bypass upper guide Upper plate Bypass pickup solenoid Solen...

Page 228: ...r S35 1 Take off the bypass feed upper cover P 10 12 A 4 Bypass feed upper cover 2 Remove 4 screws and take off the upper plate Fig 10 22 3 Take off the sensor arm Fig 10 23 4 Disconnect the connector from the sensor and release the latch to take off the bypass paper sensor Fig 10 24 Upper plate Sensor arm Bypass paper sensor ...

Page 229: ...s oil on the surface of timing belt the pulley and the roller 5 Install the bypass pickup roller and the bypass feed roller in the correct direction Fig 10 25 1 Take off the bypass upper guide P 10 13 A 5 Bypass upper guide 2 Remove the clip and take off the bypass feed roller Notes Make sure the following items when assem bling the bypass feed roller 1 Set the timing belt to the pulley securely 2...

Page 230: ...ypass transport roller Fig 10 27 1 Take off the bypass tray and hinge assembly P 10 10 A 2 Hinge assembly 2 Disconnect 1 connector and release the har ness clamp 3 Remove the harness clamp Fig 10 28 4 Remove 3 screws and take off the bracket 5 Remove the bushing and the bypass feed clutch Note Match the protruding portion of the clutch and bracket for assembling Fig 10 29 Bushing Bushing Bypass tr...

Page 231: ...P 10 9 A 1 Bypass unit 2 Remove 3 screws and take off the lower plate Fig 10 30 3 Take off the bypass separation roller assem bly Fig 10 31 4 Detach the cover the arbor and the clutch spring from the shaft and then take off the bypass separation roller Fig 10 32 Lower plate Bypass separation roller assembly Shaft Bypass separation roller Cover Clutch spring Arbor ...

Page 232: ...it 2 Remove 3 screws and take off the lower plate Fig 10 33 3 Disconnect 1 connector Remove 1 screw and take off the sensor plate Fig 10 34 4 Release the latch to take off the bypass feed sensor Note Be careful not to come off the sensor arm and the sensor spring after taking off the sensor Fig 10 35 Lower plate Sensor plate Connector Sensor spring Sensor arm Bypass feed sensor ...

Page 233: ...off the upper and lower drawers 2 Remove 1 screw and take off the drawer feeding unit by sliding it to the front side Fig 10 36 1 Take off the drawer feeding unit P 10 19 B 1 Drawer feeding unit 2 Disconnect the connector and release the latch to take off the tray up sensor 3 Disconnect the connector and release the latch to take off the empty sensor Fig 10 37 Drawer feeding unit Empty sensor Tray...

Page 234: ...he paper stock sensor arm 3 Disconnect the connector and release the latch to take off the paper stock sensor Fig 10 38 1 Take off the drawer feeding unit P 10 19 B 1 Drawer feeding unit 2 Remove 1 screw and take off the separation roller holder Fig 10 39 3 Detach the lever from the holder and take off the separation roller with the shaft Fig 10 40 Paper stock sensor Sensor arm Separation roller h...

Page 235: ...f the separation roller Fig 10 41 1 Take off the separation roller holder P 10 20 B 4 Separation roller 2 Remove the clip and take off the feed roller Fig 10 42 1 Take off the drawer feeding unit P 10 19 B 1 Drawer feeding unit 2 Remove the pickup roller assembly from the pickup arms and take off the belt Fig 10 43 Arbor Arbor Cover Clutch spring Shaft Separation roller Clip Feed roller Pickup rol...

Page 236: ...ig 10 44 1 Take off the drawer feeding unit P 10 19 B 1 Drawer feeding unit 2 Disconnect the connector and release the harness from the harness clamp Fig 10 45 3 Remove 2 screws and take off the clutch bracket and bushing Note Match the protruding portion of clutch with the position shown in the figure for assem bling Fig 10 46 E ring E ring Pulley One way clutch Pickup roller Connector Bushing Cl...

Page 237: ...etscrew and take off the drawer feed clutch Fig 10 47 Note Attach the clutch to the shaft referring to the figure at right Fig 10 48 1 Remove the upper and lower drawers 2 Take off the filter bracket P 2 41 K FIL board FIL 3 Disconnect 1 connector Remove 4 screws and take off the tray drive unit Fig 10 49 Setscrew Drawer feed clutch 0 2 0 5mm Tray drive unit ...

Page 238: ...ts coupling up and release 6 latches to take off the cover Note Be careful in taking off the cover because there is a spring in the tray drive unit Fig 10 50 5 Take off the tray up motor Fig 10 51 Note Match the boss of the gear with the hole of the cover when installing the motor Fig 10 52 Cover Coupling Coupling Tray up motor ...

Page 239: ... the bracket Notes 1 Do not push the transport roller shaft strongly when installing the bracket and tighten the screws in the order of A B and C 2 When the installation is finished open the side cover and check if the transport roller rotates smoothly Fig 10 54 3 Disconnect 1 connector and take off the lower transport clutch High speed Notes 1 Hook the harness of the clutch onto the harness holde...

Page 240: ...othly Fig 10 56 3 Take off the paper feed guide assembly P 10 27 F Paper feed guide assembly 4 Remove 1 clip from the transport roller Slide the transport roller to the rear side and remove it from the bushing on the front side Then pull out the roller slantwise to the front side Fig 10 57 5 Disconnect 1 connector and take off the lower transport clutch low speed Notes 1 Hook the harness of the cl...

Page 241: ...nob and take off the pre registration guide Note When taking off the pre registration guide pay attention not to drop the removed paper dust from the brush into the inside of the equipment Fig 10 59 1 Take off the 2nd transfer unit P 14 16 J 2nd transfer unit 2 Remove 1 screw and take off the gear cover Fig 10 60 3 Open the side cover 4 Remove 6 screws and take off the stay Fig 10 61 Pre registrat...

Page 242: ... feed guide assembly by sliding it to the rear side Fig 10 62 1 Take off the pre registration guide P 10 27 E Pre registration guide Paper dust removal brush 2 Take off the knob Fig 10 63 3 Take off the paper feed guide assembly P 10 27 F Paper feed guide assembly 4 Remove 3 screws and take off the registra tion guide while lifting it up Fig 10 64 Paper feed guide assembly Khob Registration guide ...

Page 243: ... the lower drawer feed sensor Fig 10 65 1 Take off the paper feed guide assembly P 10 27 F Paper feed guide assembly 2 Disconnect 1 connector release 2 latches and take off the side cover opening closing switch Fig 10 66 1 Take off the registration guide P 10 28 G Registration guide 2 Remove 1 screw and take off the bracket 3 Remove the sticker and disconnect 1 con nector Release 2 latches and tak...

Page 244: ...move 1 screw and take off the bracket 3 Remove the sticker and disconnect 1 con nector Release 2 latches and take off the registration sensor Fig 10 68 1 Take off the front right cover P 2 28 J Front right cover 2 Take off the registration guide P 10 28 G Registration guide 3 Remove 2 screws and take off the bracket Fig 10 69 4 Remove 1 screw and take off the cover Fig 10 70 Registration sensor Co...

Page 245: ...e Fig 10 71 8 Remove 1 spring 1 clip and 1 bushing each from the front and rear sides 9 Take off the registration roller metal roller while sliding it to the rear side Note When installing the springs make sure not to mix up the front and rear side spring since they are different The rear side spring is marked in black Fig 10 72 1 Loosen 1 screw and take off the intermediate guide by sliding to th...

Page 246: ...CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 32 Notes 1 When the intermediate guide is being installed be sure that the guide is not get ting on the boss A 2 Hook the center latch of the intermediate guide securely Fig 10 74 A A A 05 08 ...

Page 247: ...Description This chapter explains about the area around the drum drum itself image processing their parts and control circuits Fig 11 1 Drum cleaner brush Cleaning blade Discharge LED Drum Main charger Drum thermistor Ozone exhaust duct Automatic wire cleaning drive unit Toner recovery auger Toner bag full detection sensor Toner recovery blade ...

Page 248: ...rts Wire pad PM parts Cleaning blade PM parts Recovery blade Toner recovery auger Drum cleaning brush PM parts Discharge LED unit Discharge LED Ozone exhaust duct Automatic wire cleaning drive unit Charger cleaner motor M13 Charger cleaner front position detection switch S25 Charger cleaner rear position detection switch S26 Temperature Humidity sensor S19 Ozone filter PM parts Ozone exhaust fan M...

Page 249: ...tant force by pressure springs and scrapes off the residual toner on the drum surface Also it removes the positive charge on the photoconductive drum by applying negative charge on the blade Recovery blade This blade catches the toner scraped off by the cleaning blade Toner recovery auger This auger carries the residual toner scraped off to the toner bag Drum cleaner brush This brush roller preven...

Page 250: ... voltage Vc of the main charger bias main charger grid bias 1st transfer roller bias 2nd transfer roller bias black developer bias color developer bias and clean ing blade bias 9 Temperature humidity sensor S19 This sensor measures the environment inside the equipment The values of the temperature and humidity detected inside the equipment are output to the LGC board ...

Page 251: ... control volt age Vc with the output ON signal Adjustment of the control voltage Vc change of adjustment data is performed in the Adjustment Mode 05 Output value of the cleaning blade bias is fixed when the transformer board is shipped from the factory The output of the 1st transfer roller bias can be switched to that of the constant voltage or current with the switching signal It normally switche...

Page 252: ...etection circuit Since the photoconductive characteristic of the drum surface varies drastically depending on the surface temperature of the drum this circuit detects the temperature of the drum surface to gain the charging potential according to the environment 2 Configuration of the drum temperature detection circuit Fig 11 3 Engine CPU Drum thermistor LGC board 5 1V SG DRTMP ...

Page 253: ...1 6 1 General description This sensor measures the temperature and humidity inside the equipment 11 6 2 Construction Temperature humidity control circuit is configured as follows Fig 11 4 1 0 5 1V SG SG SG SG 5 1V Analog switch LGC board Temperature humidity sensor TEMPS 1 HUMIS 1 ALSW02 TEMPS 1 HUMIS 1 Engine CPU Gate array 1 RTH Temp VRHV Hum ...

Page 254: ...ed number of pages has been printed out default value 1 000 pages from the last cleaning If the number of pages has reached the setting value during continuous printing the clean ing movement is performed upon the completion of this printing job 11 7 2 Construction 1 Charger cleaner motor M13 This motor is a DC brush motor and supplies the drive to the wire cleaner When the motor rotates in revers...

Page 255: ...gnal Level L H ENVSNR1 0 Charger wire cleaner front posi tion detection signal Charger wire cleaner is at the front position Charger wire cleaner is at the posi tion other than the front position ENVSNR2 0 Charger wire cleaner rear posi tion detection signal Charger wire cleaner is at the rear position Charger wire cleaner is at the posi tion other than the rear position LGC board Engine CPU Motor...

Page 256: ...er bag B Process unit 1 Open the front cover and take off the toner bag Fig 11 6 1 Take off the toner bag P 11 10 A Toner bag 2 Take off the black developer unit cover Fig 11 7 3 Open the toner cartridge holder Then remove 2 screws and take off the center inner cover Fig 11 8 Toner bag Black developer unit cover Center inner cover Screw Screw ...

Page 257: ...cket completely toward you Note If the interlock switch bracket does not lie down completely pull the harness a little and then try to lay it down Fig 11 9 5 Disconnect 3 connectors and remove 2 screws Fig 11 10 6 Loosen 2 screws and take off the process unit by pulling it toward you Fig 11 11 Switch bracket Harness Connector Connector Screw Process unit 06 07 ...

Page 258: ...with the unit Perform the following check and then install the process unit again Note Hold A B C and D as shown in the right hand figure when handling the process unit Fig 11 12 1 Rotate the transfer belt drive couplings on the rear frame of the equipment counterclockwise by 180 degrees Fig 11 13 2 Push all of the 3 transfer belt drive cou plings on the rear frame to the inside and check if they ...

Page 259: ...are engaged with the shaft correctly Fig 11 15 4 Check if there is any breakage defor mation or looseness of the transfer belt drive couplings on the transfer belt unit Fig 11 16 1 Take off the process unit P 11 10 B Process unit 2 Take off the main charger unit P 11 15 D Main charger unit 3 Remove 1 screw on the front side and 1 screw on the rear side Then loosen 1 screw on the front side and dis...

Page 260: ...CTION 11 14 4 Lift up the transfer belt unit and insert the screw removed in step 3 into the screw hole on the front side Fig 11 18 5 Loosen 1 screw and take off the drum stay Fig 11 19 6 Remove 2 screws and take off the bushing of the drum Fig 11 20 Screw Transfer belt unit Drum stay Bushing ...

Page 261: ...rmistor 4 Be sure not to touch or scratch the edge of the cleaning blade Fig 11 21 1 Take off the process unit P 11 10 B Process unit 2 Rotate the gear counterclockwise for 1 round or more 3 Release 2 latches and take off the main charger unit Note Be sure not to touch or damage the drum surface Fig 11 22 Note When the main charger unit is being installed rotate the gear counterclockwise for 1 rou...

Page 262: ...esh area of the grid Fig 11 24 1 Take off each terminal cover on both front and rear sides Fig 11 25 2 Take off 1 terminal and remove 1 spring Then take off the charger wire Notes When the charger wire is being installed pay attention to the following 1 Insert the each edge of the wire securely into each V groove on both front and rear sides 2 Do not twist the wire 3 Do not touch the wire directly...

Page 263: ... pads are installed in a proper direc tion 2 Release 1 latch and take off the wire pad Fig 11 27 3 Remove 1 screw and take off the pad guide Fig 11 28 4 Take off the base Note When the base is being installed be sure that the base and the belt are engaged in the same manner as they were before being taken off It is recommended to mark off the position of each before they are taken off Fig 11 29 Wi...

Page 264: ...h the edge of the cleaning blade Fig 11 30 1 Take off the drum P 11 13 C Drum 2 Take off the recovery blade Notes 1 When the recovery blade is being attached clean the attaching side of the cleaner side and then attach the blade paying attention not to deform it 2 Attach the recovery blade by pushing it to the step of the attaching part 3 When the blade has been attached press the attached part se...

Page 265: ... belt unit P 14 8 A Transfer belt unit Transfer belt cleaning unit 2 Take off the drum P 11 13 C Drum 3 Take off the main charger unit P 11 15 D Main charger unit 4 Remove 1 screw and disconnect the connec tor Then take off the drum thermistor with its bracket Fig 11 34 5 Remove 1 screw and take off the drum ther mistor Fig 11 35 Drum cleaner brush Connector Drum thermistor Drum thermistor Screw ...

Page 266: ...1 10 B Process unit 2 Remove 2 screws and lift up the discharge LED unit 3 Disconnect 2 connectors and take off the dis charge LED unit Fig 11 36 4 Disconnect 1 connector and take off the dis charge LED Fig 11 37 1 Disconnect 2 connectors and remove 1 screw Then take off the charger cleaner motor unit Fig 11 38 Screw Screw Discharge LED unit Discharge LED Charger cleaner motor unit ...

Page 267: ...gear bracket Remove 1 screw and take off the motor guide Fig 11 39 3 Disconnect 1 connector and remove 2 screws Then take off the charger cleaner motor from the motor bracket by rotating it upward Fig 11 40 1 Take off the discharge LED unit P 11 20 L Discharge LED ERS 2 Remove 1 screw and separate the discharge LED unit into 2 sections Fig 11 41 Motor guide Gear bracket Charger cleaner motor ...

Page 268: ... take off the rear posi tion switch arm Fig 11 42 5 Disconnect 2 connectors and take off the front position detection switch and the rear position detection switch Fig 11 43 1 Take off the process unit P 11 10 B Process unit 2 Disconnect 1 connector and remove 1 screw Then take off the toner bag full detection sensor with its bracket Fig 11 44 Front position switch arm Rear position switch arm Ton...

Page 269: ...2 26 E Front lower cover 3 Take off the inner tray P 2 26 C Inner tray 4 Take off the left cover P 2 29 K Left cover 5 Remove 2 screws and take off the left inner cover Fig 11 45 6 Disconnect 1 connector and release 2 latches Then take off the temperature humidity sensor Fig 11 46 1 Remove 1 screw and take off the cover 2 Take off the ozone filter Fig 11 47 Screw Left inner cover Temperature Humid...

Page 270: ...nge cover 4 Take off the IH terminal cover P 2 30 N IH terminal cover 5 Take off the right rear cover P 2 30 O Right rear cover 6 Take off the rear cove 2 P 2 32 S Rear cover 2 7 Take off the SYS board case P 2 35 D SYS board case 8 Take off the flywheel P 9 9 A Developer motor drive unit 9 Disconnect 1 connector and remove 3 screws Then take off the ozone exhaust fan with its duct Fig 11 48 10 Re...

Page 271: ...or images Y M or C the black developer unit escapes contacting with the drum When developing black images each color developer unit escapes from the drum by rotating the revolver and the black developer unit contacts with the drum instead The developer motor M11 drives the lifting movement and developer sleeve rotation of the black developer unit and also the toner supply and developer sleeve rota...

Page 272: ...11 Chapter 9 Black developer drive clutch CLT10 Chapter 9 Black developer lifting section Developer motor M11 Chapter 9 Black developer lifting clutch CLT11 Chapter 9 Black developer contact position detection sensor S11 Black developer contact timing detection sensor S12 Revolver unit Chapter 13 Color developer unit Mixer unit Developer sleeve Magnetic roller Doctor blade Developer material PM pa...

Page 273: ... The toner motor supplies toner to the black developer unit from the toner cartridge It is driven by the motor driver IC TA8428K through an overcurrent protection device The overcurrent protection device is mounted to protect the toner motor and toner motor driver When the motor abnormality occurred and the motor drive current exceeding the specified level surged internal resistance of the overcur...

Page 274: ...rs have magnets inside The developer material is pulled by these magnets to form a magnetic brush The magnets are fixed at their position so only the sleeve rotates By this rotation the developer material is transported to the developer sleeve Then the magnetic brush formed at the developer sleeve sweeps over the drum surface and thus development is performed 4 Doctor blade The doctor blade contro...

Page 275: ...per unit drive section The developer motor M11 drives the black developer unit Connection and disconnection of the devel oper motor drive is made by ON OFF of the black developer drive clutch CLT10 The drive is con nected when it is ON and disconnected when it is OFF Fig 12 4 Gear G19 Gear G20 Gear G21 Gear G20 Gear G19 ...

Page 276: ...bilizing function During the printing operation Through the following phases the toner density is kept constant Toner is consumed Toner density decreases Output change of the auto toner sensor is detected depending on the humidity Drives toner motor Supplies toner to the developer unit from the toner cartridge Toner empty detection clear function Detects toner being empty in the toner cartridge Dr...

Page 277: ...ircuit Converting the high frequency output from the detection winding to a DC signal auto toner output ATS Fig 12 6 When the toner density is low Toner ratio to the carrier in the developer material decreases Magnetic resistance decreases Detection output increases Auto toner output VATS increases When the toner density is high Toner ratio to the carrier in the developer material increases Magnet...

Page 278: ...ects whether the black developer unit is at the developing position or at the escape position 2 Construction Black developer lifting clutch CLT11 An electromagnetic clutch contacts or releases the black developer unit against the drum The clutch movement lifts the developer unit up and down by rotating the cam Black developer contact position detection sensor S11 Detects whether the black develope...

Page 279: ...orce 3 Developer sleeve Magnetic roller These aluminum rollers have magnets inside The developer material is pulled by these magnets to form a magnetic brush The magnets are fixed at their position so only the sleeve rotates By this rotation the developer material is transported to the developer sleeve Then the magnetic brush formed at the developer sleeve sweeps over the drum surface and thus dev...

Page 280: ...oper motor M11 drives the color developer unit Connection and disconnection of the devel oper motor M11 drive is made by ON OFF of the color developer drive clutch CLT9 The drive is con nected when it is ON and disconnected when it is OFF The transmitted drive operates the mixers Fig 12 8 Coupling G20 Gear G19 Gear G27 Gear G21 Gear G18 Gear G19 G27 ...

Page 281: ...the toner runs out it supplies the toner from the toner cartridge with the color toner supply auger driven by the color developer toner supply clutch Also the color auto toner sensor has a shutter which opens and closes by the solenoid It prevents stain to the sensor and calibrates the sensor with the reflection from the shutter Fig 12 9 D A converter Engine CPU A D converter Gate array 2 Gate arr...

Page 282: ...umed Toner density decreases Output change of the auto toner sensor is detected at the preceding position to the develop ing position Drives the developer motor at the developing position Drives the color developer toner supply clutch Supplies the toner for a specified period of time The same procedure is repeated for other two colors Toner empty detection clear function Detects toner being empty ...

Page 283: ...ed and the unit moves to the color toner density detection position to detect the density 4 When the toner density detected is higher than the regulated value it moves to the escape position When the toner density detected is lower than the regulated value it repeats the procedure 1 to 3 for five times If the toner density is still lower than the regulated value it is judged as toner empty and the...

Page 284: ... value in both color and black modes since each mode has a differ ent control condition Fig 12 10 Outputs adjustment value of the developer bias DC in the NVRAM to the gate array Outputs control voltage data from the gate array to the D A converter Analog conversion by the D A converter Outputs control voltage Vc to the developer bias transformer The developer bias transformer generates output vol...

Page 285: ...nit 1 Open the front cover and take out the toner bag P 11 10 A Toner bag 2 Turn the black developer unit lifting lever to the position where a clock hand could be at 9 o clock and take off the black developer unit cover Fig 12 11 3 Disconnect 2 connectors Fig 12 12 4 Remove 1 screw and pull out the black developer unit Fig 12 13 Black developer unit cover Black developer unit ...

Page 286: ...erved DEVELOPER UNIT 12 16 A 2 Developer material 1 Take off the black developer unit P 12 15 A 1 Black developer unit 2 Remove 2 screws and take off the upper cover Fig 12 14 3 Discharge the developer material Fig 12 15 4 Pour the developer material Fig 12 16 Upper cover ...

Page 287: ...he urethan seal is covered by the upper cover Fig 12 17 1 Discharge the developer material P 12 16 A 2 Developer material 2 Disconnect 1 connector remove 1 screw and take off the auto toner sensor Fig 12 18 1 Discharge the developer material P 12 16 A 2 Developer material 2 Remove 2 screws release 1 hook and take off the right cover Fig 12 19 Urethan seal Screw Black auto toner sensor Right cover ...

Page 288: ... Doctor blade 3 Remove 3 screws Disconnect 1 connector and take off the front cover Fig 12 21 4 Remove 1 screw and take off the polarity adjustment plate Note Before disassembling record mark if any the scale pointed by the polarity adjustment lever Then match the polarity adjustment plate at the scale previously recorded when reassembling 5 Remove 1 screw and take off the bracket Fig 12 22 Screw ...

Page 289: ...arts installed on the shaft of the developer sleeve in order Bushing collar roller bearing 1 E ring bearing 2 and oil seal Procedure for replacing an oil seal P 12 32 Fig 12 63 Fig 12 24 8 Rear side Remove the following parts installed on the shaft of the developer sleeve in order E ring bushing collar roller bear ing 1 E ring gear pin bearing 2 and oil seal Fig 12 25 Screw Screw Rear cover ...

Page 290: ...off the developer sleeve P 12 18 A 5 Developer sleeve 3 Front side Remove the following parts installed on the shaft of each mixer in order E ring bushing 1 and bushing 2 Procedure for replacing an oil seal P 12 32 Fig 12 63 Fig 12 27 4 Rear side Remove the following parts installed on the shaft of each mixer in order E ring gear bearing and oil seal Procedure for replacing an oil seal P 12 32 Fig...

Page 291: ...nt position Notes Perform the operation on the control panel 1 1 In the USER FUNCTION menu USER FUNCTION USER GEN RAL REPLACE TONER CAR TRIDGE 2 In the Test Mode 03 03 452 Yellow toner cartridge moves to the replacement position 03 453 Magenta toner cartridge moves to the replacement position 03 454 Cyan toner cartridge moves to the replacement position 2 Open the front cover and take off the colo...

Page 292: ...developer unit moves to the replacement position 03 456 Magenta developer unit moves to the replacement position 03 457 Cyan developer unit moves to the replacement position Fig 12 31 5 Loosen 2 screws on each holder and take off the holder on both sides of the color devel oper unit Fig 12 32 6 Take off the color developer unit Note If the other color developer units still need to be replaced repe...

Page 293: ...move 2 screws release 5 hooks and take off the toner holder by rotating it Notes 1 Do not try to release the hooks forcibly 2 When installing the toner holder rotate the holder with hooking the magnet roller side of it 3 When installing the toner holder be care ful not to peel the seal Fig 12 34 Fig 12 35 Fig 12 36 Toner holder ...

Page 294: ...2 24 B 3 Doctor blade 2 Discharge the developer material Fig 12 37 3 Pour the developer material Fig 12 38 1 Discharge the developer material P 12 23 B 2 Developer material 2 Remove the urethane seal 3 Remove 2 screws and take off the doctor blade Fig 12 39 Urethan seal Doctor blade Screw Screw ...

Page 295: ... Before disassembling record mark if any the scale pointed by the polarity adjustment lever Then match the polarity adjustment plate at the scale previously recorded when reassembling Fig 12 40 4 Remove the following parts installed on the shaft of the developer sleeve in order C ring bearing 1 C ring E ring bearing 2 and oil seal Procedure for replacing an oil seal P 12 32 Fig 12 63 Fig 12 41 5 R...

Page 296: ...eal Procedure for replacing an oil seal P 12 32 Fig 12 63 Fig 12 43 7 Take off the developer sleeve Fig 12 44 1 Discharge the developer material P 12 23 B 2 Developer material 2 Take off the developer sleeve P 12 25 B 4 Developer sleeve 3 Front side Remove the following parts in order E ring bushing 1 and bushing 2 Procedure for replacing an oil seal P 12 32 Fig 12 63 Fig 12 45 Developer sleeve Bu...

Page 297: ... seal P 12 32 Fig 12 63 Fig 12 46 5 Take off the mixer from the hole of front side Fig 12 47 1 Take off the black toner supply unit P 12 28 D Black toner supply unit 2 Remove 2 springs Note The springs on both front and rear sides dif fer in the active coils length of spring When installing pay attention to its active coils length of spring Front side 20 longer Rear side 18 shorter Fig 12 48 Gear ...

Page 298: ... Release the latches and take off the black developer contact timing detection sensor Fig 12 50 1 Take off the front right cover P 2 28 J Front right cover 2 Take off the black developer unit P 12 15 A 1 Black developer unit 3 Take off the discharge LED unit P 11 20 L Discharge LED ERS 4 Take off the laser optical unit P 8 11 A Laser optical unit 5 Take off the black toner cartridge 6 Remove 1 scr...

Page 299: ...ews and disconnect 2 connec tors Fig 12 52 8 Take off the toner supply unit by lifting up and pulling out toward you to release it from the catch Fig 12 53 9 Remove 1 screw and take off the black toner cartridge switch with the whole bracket Fig 12 54 Screw Screw Black toner supply unit Black toner cartridge switch ...

Page 300: ...ff the toner motor Fig 12 55 1 Take off the black toner supply unit P 12 28 D Black toner supply unit 2 Take off the black developer lifting unit P 12 27 C Black developer lifting unit 3 Remove 1 screw and take off the rail Fig 12 56 4 Remove 2 screws and take off the black toner supply auger unit Fig 12 57 Toner motor Rail Screw Black toner supply auger unit ...

Page 301: ... off the maintenance tray P 2 25 B Maintenance tray 2 Disconnect 1 connector Loosen 2 screws and then take off the color auto toner sensor unit Fig 12 58 3 Disconnect 1 connector remove 2 screws and take off the color auto toner sensor shut ter solenoid Fig 12 59 4 Remove 2 screws and 1 spring and take off the stay Fig 12 60 Color auto toner sensor unit Shutter solenoid Stay Spring ...

Page 302: ... oil seal Take off the oil seal by hooking out its inside with a fine screwdriver and such Push in a new oil seal parallel to the frame bushing and so on with paying attention to its direction as shown by the figure at right Spread the grease Alvania No 2 about 2 ricegrain s amount all around the inside diameter Note Wipe off the grease which has run off to the inner side of the oil seal Fig 12 63...

Page 303: ...r cartridges inside The revolver rotates 120 degrees in a clockwise direction to move each color developer unit to the developing position and thus color development is performed At black develop ment the revolver rotates to move them to the escape position not to contact with the photoconductive drum Fig 13 1 Color auto toner sensor Photoconductive drum Revolver unit Revolver motor Revolver home ...

Page 304: ...ins about the following units parts and control circuits related to the revolver unit Refer to Chapter 12 for the color developer unit P 12 9 12 5 Color Developer Unit and Chapter 9 for the developer motor drive unit P 9 6 9 4 Developer Motor M11 Revolver unit Revolver motor Revolver home position sensor Color toner cartridge sensor ...

Page 305: ...y this motor 3 Color developer unit The color developer units must be in the revolver unit to perform color development Since the revolver unit has no device to detect misinstallation be careful not to install the wrong unit Refer to Chapter 12 for details 4 Color toner cartridge sensor S9 This sensor detects the installation fault of the color toner cartridge It is an optical reflection sensor de...

Page 306: ...VOLVER UNIT 13 4 13 4 Drive of Revolver Unit The drive from the revolver motor M12 is transmitted to the gear at the external layer of the revolver unit rear side Then the revolver unit rotates clockwise Fig 13 2 Revolver motor G15 Revolver unit G135 Revolver home position sensor ...

Page 307: ...evolver motor two phase stepping motor drives over the DRV board circuit Fig 13 3 Engine CPU RVMA RVMB RVMC Revolver motor RVMD RVMPHA 0 5 1V 24V 24V 24V RVMPHB 0 RVMPHC 0 RVMC3 0 RVMC1 0 RVMC2 0 RVMBHD 0 RVMC1 0 Motor driver IN1 IN2 GATE1 GATE2 REF Motor driver IN1 IN2 GATE1 GATE2 REF Gate array 1 5VSW LGC board DRV board FET FET FET FET ...

Page 308: ...image developing position Yellow image developing position Escape position printing completed In addi tion to the basic movement mentioned above the revolver operations such as toner supply and image quality control are performed according to the conditions of the equipment 1 Image quality control is performed immediately before the printing operation according to the condi tions of the equipment ...

Page 309: ...er density is still lower than the regulated value it is judged as Toner empty and the unit moves to the escape position 5 Procedure 1 to 4 is repeated for other color developer units when the toner supply is needed 13 6 6 During image quality control 1 A black test pattern is formed on the transfer belt while the revolver unit is at the escape position 2 The revolver unit moves to the cyan develo...

Page 310: ...ray 2 Disconnect 1 connector Loosen 1 screw and take off the color toner cartridge sensor with the whole bracket Fig 13 4 3 Disconnect the connector and remove 1screw and then take off the toner cartridge sensor Fig 13 5 1 Take off the inner tray P 2 26 C Inner tray 2 Disconnect 1 connector and remove 2 screws Then take off the internal cooling fan together with the duct Fig 13 6 Color toner cartr...

Page 311: ...ff the internal cooling fan Fig 13 7 1 Take off the left cover P 2 29 K Left cover 2 Disconnect 1 connector and remove 1 screw Then take off the revolver home position sen sor with the whole bracket Fig 13 8 1 Take off the LGC board case P 2 38 F LGC board case 2 Disconnect 1 connector and remove 2 screws and take off the revolver motor Fig 13 9 Internal cooling fan Revolver home position sensor R...

Page 312: ...veloper unit P 12 21 B Color developer unit 2 Remove 1 screw release 1 latch and take off the holder Then take off the color developer unit drive gear and color toner supply drive gear Fig 13 10 Notes 1 When installing insert the shaft of the holder into the revolver unit securely 2 Apply the grease to the shaft after the replacement of the gears Fig 13 11 Holder Grease Grease 06 07 ...

Page 313: ...r auto toner sensor S10 Color auto toner sensor shutter sole noid SOL1 6 Take off the color toner cartridge sensor P 13 8 A Color toner cartridge sensor S9 7 Take off the internal cooling fan P 13 8 B Internal cooling fan M20 8 Take off the revolver home position sensor P 13 9 C Revolver home position sen sor S8 9 Take off the laser optical unit P 8 11 A Laser optical unit 10 Release 2 latches tak...

Page 314: ...s reserved REVOLVER UNIT 13 12 12 Remove 6 screws and take off the bracket Fig 13 14 13 Remove 4 screws and take off the stay Remove 1 of 4 screws from the rear side of the equipment Fig 13 15 14 Remove 3 screws and take off the bracket Fig 13 16 Bracket Stay Bracket ...

Page 315: ...IT 13 13 15 Remove the stopper attached on the front side of the revolver unit rotary shaft 16 Push in the bearing to the inside of the frame and come it off from the frame Fig 13 17 17 Slide the revolver unit to the front and take off the revolver unit Fig 13 18 Stopper Bearing Revolver unit ...

Page 316: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved REVOLVER UNIT 13 14 ...

Page 317: ...per is called 2nd trans fer To reproduce a color image maximum four color images are overlaid on the transfer belt and the over laid image is then transferred to the paper Namely the transfer belt turns four times for printing of one image The transfer belt rotates with the main motor M6 drive Fig 14 1 Drum Idling roller Tension roller 1st transfer roller 2nd transfer guide roller 2nd transfer rol...

Page 318: ...er belt home position sensor 2 S16 Transfer belt cleaning unit Transfer belt cleaning blade PM parts Used toner auger Transfer belt cleaning unit side seal F PM parts Transfer belt cleaning unit side seal R PM parts Transfer belt cleaning unit side mylar F PM parts Transfer belt cleaning unit side mylar R PM parts Transfer belt cleaner auger motor M2 Transfer belt cleaner clutch CLT1 2nd transfer ...

Page 319: ...he transfer belt This roller is driven by the transmitted drive from the main motor M6 In addition contacts the transfer belt cleaning blade to the transfer belt easily Also retains the con tacting position of the transfer belt and the photoconductive drum 7 Tension roller Applies the tensile force to the transfer belt with its spring 8 Idling roller Retains the contacting position of the transfer...

Page 320: ...IBA TEC CORPORATION All rights reserved TRANSFER UNIT 14 4 13 2nd transfer roller position detection sensor S18 This sensor is a photointerrupter detecting whether the 2nd transfer roller is at its contacting position or releasing position ...

Page 321: ...voltage is applied through the 1st transfer roller and it transfers the toner onto the transfer belt 2 The transfer belt home position sensor 2 S16 detects its home position and overlays four color images 3 When the transfer of the toner image from the transfer belt to the paper is completed in 2nd transfer residual toner on the transfer belt is scraped off by the transfer belt cleaning blade ...

Page 322: ...sed position from the transfer belt in 1st transfer 2 Upon the completion of 1st transfer the 2nd transfer roller moves to the transfer position 3 After an electrode bias is applied on the 2nd transfer roller the toner image is transferred from the transfer belt to the paper 4 Upon the completion of 2nd transfer the 2nd transfer roller escapes to the releasing position ...

Page 323: ... transfer roller the toner will be supplied from the intermediary belt to the paper When the voltage of negative polarity is supplied to the 2nd transfer roller the toner on the 2nd transfer roller is transferred to the transfer belt reversely The toner on the transfer belt is eliminated by the cleaning unit and thus cleaning of the 2nd transfer roller is performed Fig 14 2 Engine CPU NVRAM D A co...

Page 324: ...gloves to avoid a direct touch on the belt surface 1 Take off the process unit P 11 10 B Process unit 2 Remove 2 screws on the front side Fig 14 3 3 Remove 2 screws shoulder screw on the rear side 4 Disconnect 1 connector on the rear side Fig 14 4 5 Take off the transfer belt Note When the transfer belt unit is being installed screw the unit by pressing it downward Fig 14 5 Connector Transfer belt...

Page 325: ...81c 351c 451c TRANSFER UNIT 14 9 6 Remove 1 screw and take off the left rail Fig 14 6 7 Remove 2 springs Note Make sure that the spring is not installed incorrectly or deformed Fig 14 7 8 Remove 1 screw and take off the bracket Fig 14 8 Left rail Spring Spring Bracket ...

Page 326: ... surface 9 Take off the transfer belt cleaning unit Fig 14 9 1 Take off the transfer belt cleaning unit P 14 8 A Transfer belt unit Transfer belt cleaning unit 2 Remove 1 screw and take off the right rail Fig 14 10 3 Remove 1 screw on the front side and 1 screw on the rear side Then lay down the tension roller Fig 14 11 Transfer belt cleaning unit Right rail Screw Screw Tension roller ...

Page 327: ...the transfer belt in the middle so that it does not move to one side 2 Install the transfer belt with the reflection tape on the inner side of the belt come at the rear side 3 Do not touch the belt surface directly with bare hands 4 Be sure not to scratch the belt surface 5 When the belt is being replaced clean its drive roller 2nd transfer facing roller ten sion roller idling roller and 2nd trans...

Page 328: ...ransfer belt 2 Remove 1 screw 3 Take off the holder on the rear side and take off the 1st transfer roller Fig 14 15 1 Take off the transfer belt P 14 10 B Transfer belt 2 Remove 1 screw and take off the cover Fig 14 16 3 Disconnect 1 connector and remove 1 screw Then take off the transfer belt home position sensor 1 Fig 14 17 1st transfer roller Holder Screw Cover Transfer belt home position senso...

Page 329: ... off the transfer belt P 14 10 B Transfer belt 2 Remove 1 screw and take off the cover Fig 14 18 3 Disconnect 1 connector and remove 1 screw Then take off the transfer belt home position sensor 2 Fig 14 19 1 Take off the process unit P 11 10 B Process unit 2 Loosen 1 screw and take off the drum stay Fig 14 20 Cover Transfer belt home position sensor 2 Drum stay ...

Page 330: ... position shown in the figure at right by slightly pushing it to the direction of the arrow 2 Be sure that the attached blade seals come at the bottom side of the recovery blade Fig 14 22 4 Remove the blade mylars both front and rear sides Notes 1 When both the blade mylars are being attached attach them on the position shown in the figure at right by slightly pushing it to the direction of the ar...

Page 331: ...nd take off the transfer belt cleaner auger motor with its bracket Fig 14 24 4 Remove 2 screws and take off the transfer belt cleaner auger motor from its bracket Fig 14 25 1 Open the 2nd transfer unit 2 Remove 1 clip 1 collar with bearing 1 washer and 1 bushing with bearing on the front side of the 2nd transfer roller 3 Remove 1 clip and slide 1 bushing with bearing on the rear side of the 2nd tr...

Page 332: ...the holder When the roller is reassembled make sure that the spring is not installed incorrectly or deformed Fig 14 27 1 Take off the right front hinge cover P 2 28 I Right front hinge cover 2 Remove 2 screws and take off the hinge pin Fig 14 28 3 Open the 2nd transfer unit 4 Disconnect 1 connector and release the har ness clamp 5 Remove 3 screws and take off the 2nd trans fer gear unit Fig 14 29 ...

Page 333: ...f the 2nd transfer unit P 14 16 J 2nd transfer unit 2 Take off the 2nd transfer roller P 14 15 I 2nd transfer roller 3 Remove 2 screws and take off the pre trans fer guide Fig 14 31 Note When the pre transfer guide is being installed be sure that 3 tabs of the guide come underneath the bracket metal plate Fig 14 32 2nd transfer roller Pre transfer guide 05 08 ...

Page 334: ...Disconnect 1 connector and release 2 latches and take off the 2nd transfer roller position detection sensor Fig 14 34 Note When reassembling the 2nd transfer cam shaft unit make sure to align the phase of the partial gear and the cam as shown in the figure If the partial gear is incorrectly installed in a 180 degree reversed position an operation abnormality CEC0 2nd trans fer belt position detect...

Page 335: ...clamp 3 Remove 3 screws and take off the 2nd trans fer gear unit P 14 16 J 2nd transfer unit 4 Disconnect 1 connector Remove 1 clip and take off the 2nd transfer roller contact clutch Fig 14 36 1 Take off the inner tray P 2 26 C Inner tray 2 Disconnect the connector Remove 1 clip and slide the bushing to the rear side Fig 14 37 3 Take off the transfer belt cleaner clutch Fig 14 38 2nd transfer rol...

Page 336: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved TRANSFER UNIT 14 20 ...

Page 337: ...t amount signal The light source amount voltage of the sensor is adjusted to corre spond with the value set in advance and the output value of reflected light amount signal at this adjust ment is stored This output value is considered as the reading of the belt surface Next the sensor outputs the reflected light amount signal when a test pattern is developed on the transfer belt This out put value...

Page 338: ...to output a voltage corresponding to the reflected light amount The output voltage is then converted analog to digital into reflected light amount signal The CPU cal culates the toner adhesion amount to control the image forming conditions Fig 15 1 CPU A D D A Transfer belt Test pattern toner image Light emitting element Light receiving element Reflected light amount voltage Reflected light amount...

Page 339: ... 4 The test pattern is formed on the transfer belt 5 Toner adhesion amount of test pattern high density is calculated 6 Judgment whether the toner adhesion amount of the test pattern is within the acceptable range or not Modifies the image forming conditions 7 Toner adhesion amount of the test pattern low density is calculated 8 Judgment whether the toner adhesion amount of the test pattern is wit...

Page 340: ... outputs the voltage D A converter Converts light source amount signal into the voltage to the sensor Laser optical system Performs test pattern exposure for toner image formation A D converter Converts the output voltage from the sensor into digital values and outputs them to the CPU Image forming process Performs charging laser exposing and developing processes CPU Performs steps 1 to 10 describ...

Page 341: ...s unit 3 Release the harness from the harness clamp and disconnect 2 connectors 4 Remove 2 screws and take off the image quality sensor holder Note Insert prongs of sensor holder to the hole of the plate securely when installing Fig 15 3 5 Disconnect 1 connector and remove 2 screws and then take off the image quality sensor Fig 15 4 6 Remove 2 screws and take off the image quality sensor shutter s...

Page 342: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved IMAGE QUALITY CONTROL 15 6 ...

Page 343: ...ransported to the inner tray paper exiting options or ADU The fuser unit consists of the IH coil IH COIL fuser roller pressure roller fuser belt separation roller separation fingers separation plate cleaning roller oil roller thermistors THM1 2 3 thermostat THMO1 exit roller exit sensor S40 discharge brush etc Fig 16 1 Exit roller Exit sensor Separation plate Cleaning roller Oil roller Fuser rolle...

Page 344: ...r Discharge brush PM parts Pressure roller PM parts Separation finger PM parts Fuser belt unit Fuser belt PM parts Fuser belt guide PM parts Separation roller Separation plate Cleaning unit Oil roller PM parts Cleaning roller PM parts Thermistor THM1 2 3 Thermostat THMO1 Exit roller Exit sensor S40 Exit motor M7 IH control PC board IH IH control board cooling fan M17 ...

Page 345: ...by the transmitted drive from the transport motor M9 4 Fuser belt The fuser belt is hanged up between the fuser roller and separation roller and fuses the toner image on the paper transported by being heated The thin fuser belt enables to reduce warming up time and mode changing time To prevent the fuser belt from adhering toner the surface of the fuser belt is fluorinated 5 Separation roller The ...

Page 346: ...absorption by paper since paper does not pass through this area This ther mistor is not related to the temperature control of the fuser belt 11 Fuser thermostat THMO1 The thermostat cuts off the power supply to the IH coil IH COIL by opening itself if the fuser belt becomes abnormally hot as a result of the problem such as thermistor malfunction The thermostat for this equipment is used to prevent...

Page 347: ...ation roller and separation plate separate the paper from the fuser belt Then the paper is transported to the inner tray paper exiting options or ADU through the exit roller In addition the IH coil IH COIL in the fuser roller does not structurally rotate The main and front edge thermistor THM2 1 control the temperature of fuser roller and sub thermistor THM3 detect the temperature abnormalities of...

Page 348: ...ure control circuit 250 C upper limit circuit LGC board IH board 5VSW 5VSW Main thermistor Sub thermistor Coil Fuser roller Coil output Fuse AC input Thermostat FIL board Breaker Power code Front edge thermistor IH power source drive circuit Control circuit including CPU Photocoupler AC line DC line Power supply for Photocoupler Electric power setting Error signal IH1 ON signal IH2 ON signal ...

Page 349: ... the lamp method because the fuser roller is directly heated IH coil is divided into two parts to decrease the temperature difference between the center and both ends of the fuser roller Image of Current Flowing form A to B Fig 16 3 Block diagram of IH board Fig 16 4 B A Main IH coil Current flowing on the surface of the fuser roller Current flowing inside the fuser roller Eddy current Magnetic fi...

Page 350: ...ls are as follows CN No Name of single Direction Definition CN455 2 5VSW LGC to IH CN455 3 H1PWR1 Switching signal of power setting CN455 4 H1PWR2 CN455 5 H1PWR3 CN455 6 H2PWR1 CN455 7 H2PWR2 CN455 8 H2PWR3 CN455 1 IH2 ON LGC to IH IH coil energization permitting signal CN456 1 IH1 ON CN456 4 H1ERR1 IH to LGC IH status signal P 16 10 16 5 5 Abnormality in the IH con trol circuit CN456 5 H1ERR2 CN4...

Page 351: ...ger the warming up time becomes System configuration Warming up 2 Ready Printing Energy sav ing mode Automati cally OFF Warming up time Equipment only 1160 1300W 800W 1080W 800W OFF Approx 40 sec Equipment and RADF 1 1020W Equipment RADF 1 and FIN 1160 1260W 960W Equipment RADF 1 FIN and HPU Equipment RADF 1 FIN HPU and LCF 1140 1240W 940W Equipment RADF 1 FIN HPU LCF and FAX System configuration ...

Page 352: ...ormality is detected in the IH control circuit it stops the power supply to the IH coil and displays a message Call for service 1 IH control circuit CPU output level of the IH control circuit changes depending on the condition of IH coil This output level goes through the photocoupler into the gate array Fig 16 5 VDD IH board 5VSW H1ERR2 H1ERR1 LGC board CPU Gate array ...

Page 353: ...wer voltage abnormality AC power is not supplied to the IH board C472 12 L H Switching element IGBT abnormality Wire breakings short cir cuits abnormal fluctua tions or overheating insufficient cooling of IGBT C480 15 IH coil abnormality caused by continuously applied current Current has been continu ously applied to any one of the IH coils for 15 sec onds or more H H Input current lower limit abn...

Page 354: ...th ends of the fuser belt During the continuous printing the temperature of the both ends of the fuser belt areas where the paper does not pass on generally tend to be higher than that of the other areas areas where the paper passes on The temperature of the ends are detected by the front edge thermistor and when it reaches 250 C the heater is automatically turned OFF regardless of the temperature...

Page 355: ... Auto Power Save Mode Setting Mode 08 205 When the printing is not performed in a specified period of time default setting 15 min after the previous printing is completed the equipment enters to Auto Power Save Mode ON OFF of IH coil is controlled to maintain the fuser belt surface temperature at 100 C Auto Shut Off Mode Setting Mode 08 206 When the printing is not performed in a specified period ...

Page 356: ...ly have been ruined due to causes such as leakage from the chargers Check the bias high voltage transformers and charge wires to see if any of them is defective and also look through all the data in the NVRAM When the thermistors detect overheating the engine CPU decides the error code and counter value of the fuser unit error status After turning OFF each output the IH coil exposure lamp control ...

Page 357: ...ely low and keeps turning the IH coil ON As a result the fuser belt temperature rises and possibly activates the thermostat which is a safety protection device To prevent this in advance CPU works to detect whether each thermistor is broken or not Also the thermistors constantly check the temperature of IH coil to prevent it from excessive heating by IH circuit abnormality LGC circuit abnormality ...

Page 358: ... 1 Fixed time 40 C or below Detecting 100 C 1 250 C or above C449 21 On usual 250 C or above 250 C or above 2 100 C or below C446 C443 6 3 Fixed time 100 C or below Detecting 160 C 1 250 C or above C449 21 On usual 250 C or above 250 C or above 2 160 C or below C446 C443 6 3 Fixed time 160 C or below When pre running end temperature is detected 1 250 C or above C449 22 On usual 250 C or above 250 ...

Page 359: ...once The pre running end temperature may vary depending on the temperature of the environment in which the equipment is placed When a temperature detected by the equipment is low 16 C or below the pre running end temperature set at 08 422 will be applied and in all other cases the temperature set at 08 411 will be applied At paper jam 1 250 C or above C449 29 On usual 250 C or above 250 C or above...

Page 360: ...of the exit motor The exit motor is a stepping motor The motor is turned ON OFF and the direction of its rotation is switched by controlling the output timing of pulse signal A0 A1 B0 B1 Fig 16 9 Engine CPU EXTMA EXTMB EXTMC Exit motor EXTMD EXTMA 0 5 1V EXTMB 0 EXTMC 0 EXTC3 0 EXTC1 0 EXTC2 0 EXTMD 0 EXTC1 0 Motor driver A AB B BB A1 B1 A0 B0 VREF Gate array 5VSW LGC board DRV board ...

Page 361: ...isconnect 2 connectors and 4 faston termi nals Notes 1 Make sure to hold the plastic part of the faston terminals when disconnecting them 2 Make sure not to connect each terminal to the wrong position Fig 16 10 3 Remove 2 screws and take off the fuser unit Fig 16 11 1 Take off the fuser unit P 16 19 A Fuser unit 2 Open the jam access cover and transport guide Fig 16 12 RED S BLUE C WHITE WHITE Fus...

Page 362: ...ing unit by lifting it up Note When installing fit 2 protrusions on the bot tom of the cleaning unit into the holes of the frame securely Fig 16 13 4 Remove spring A on each end of the oil roller 5 Take off the oil roller Fig 16 14 6 Remove 1 bushing from each side of the oil roller Fig 16 15 Cleaning unit Oil roller Spring A Oil roller Bushing Bushing ...

Page 363: ...aning unit P 16 19 B Oil roller 2 Remove 1 E ring and 1 bushing from the cleaning roller front side Then take off the cleaning roller 3 Remove the spring B on each end of the frame Note When installing make sure that the oil roller rotates smoothly by turning the gear C of the cleaning roller manually for a several times Fig 16 17 4 Remove 1 E ring the gear C and 1 bushing from the cleaning roller...

Page 364: ... Fig 16 19 3 Remove 1 E ring 1 bushing and 2 screws Fig 16 20 4 Pull out the bracket and IH coil 5 Take out the IH coil from the bracket Notes 1 When installing be sure to set the har nesses C and S of 4 harnesses on upper 2 Make sure that there is not any scratch or break on the white tube on the IH coil 3 Make sure that there is not any peeling or scratch on the harness tube Fig 16 21 E ring Bus...

Page 365: ...ove the spring shown in the figure at right since the removal of this spring may have the fuser roller press to deform the thermistor Fig 16 22 1 Remove the cleaning unit P 16 19 B Oil roller 2 Remove the IH coil P 16 22 D IH coil IH COIL 3 Push down the pressure releasing levers on both sides 4 Remove 1 C ring and 2 gears Fig 16 23 5 Remove 1 bearing Fig 16 24 Spring Spring C ring Gear Pressure r...

Page 366: ...er Note Be careful not to scratch the fuser belt Fig 16 25 7 Remove 2 screws and take off the bracket Fig 16 26 8 Take off the fuser roller 9 Remove 1 C ring 1 bearing and 1 fuser belt guide from the fuser roller front side Note When installing make sure that the fuser belt guide securely fits in the fuser roller groove Also make sure that the ring on the fuser belt guide securely fits in the groo...

Page 367: ...ler Fuser belt guide 2 Lift up the fuser belt unit and take it off Note Be careful not to scratch the fuser belt Lay the fuser belt on the clean place to prevent the belt from the dust Fig 16 28 3 Remove 1 screw and take off the bracket on the front side Fig 16 29 4 Remove 1 screw and take off the bracket on the rear side Fig 16 30 Fuser belt unit Bracket Screw Bracket Screw ...

Page 368: ...aration roller by sliding it 7 Take off the fuser belt Fig 16 32 Note When installing the fuser belt place a sheet of paper between the separation plate and fuser belt in order to prevent the fuser belt from being scratched by the separation plate Keep the paper between then until the fuser roller is installed Fig 16 33 Bearing E ring Fuser belt Separation roller Fuser belt Peper ...

Page 369: ... 2 Lift up the fuser belt unit and take it off Note Be careful not to scratch the fuser belt Lay the fuser belt on the clean place to prevent the belt from the dust Fig 16 34 3 Confirm that the pressure releasing levers on both sides are up Then loosen each 1 screw on both front and rear sides Fig 16 35 4 Remove 2 springs Fig 16 36 Fuser belt unit Pressure releasing lever Pressure releasing lever ...

Page 370: ... Remove 2 screws and take off the separation finger unit Fig 16 37 6 Remove the spring and separation finger Fig 16 38 1 Take off the fuser belt unit P 16 25 F Fuser belt 2 Take off the separation finger unit P 16 27 G Separation finger 3 Take off the pressure roller Fig 16 39 Separation finger unit Separation finger Pressure roller ...

Page 371: ...the fuser unit P 16 19 A Fuser unit 2 Remove 2 screws Lift up the cleaning unit and take it off Note When installing fit 2 protrusions on the bot tom of the cleaning unit into the holes of the frame securely Fig 16 41 3 Release the harnesses from the harness clamps 4 Remove 2 screws and take off the thermo stat unit Note Be careful not to scratch the fuser belt Fig 16 42 Pressure roller Bushing Be...

Page 372: ...tion to the follow ings 1 Make sure to fix the thermostat and then harness terminal in order on the bracket 2 Make sure to keep the gap between the fuser roller and thermostat is 0 7 mm to 2 0 mm while the fuser roller is pressed to the pressure roller Fig 16 44 1 Take off the fuser unit P 16 19 A Fuser unit 2 Remove 2 screws and take off the fuser unit entrance guide Fig 16 45 Thermostat Screw Br...

Page 373: ...ling be careful not to deform the thermistor Also make sure that the ther mistor is in touch with the fuser belt Fig 16 46 1 Take off the fuser unit P 16 19 A Fuser unit 2 Open the jam access cover and transport guide 3 Remove 3 screws and take off the cover A Fig 16 47 4 Remove 1 screw and bracket 5 Disconnect 1 connector and take off the exit sensor 6 Remove 1 spring Fig 16 48 Thermistor Cover A...

Page 374: ... 8 exit fingers and 1 actuator Fig 16 49 8 Remove 1 screw 9 Enlarge the frame and take off the transport guide Fig 16 50 1 Take off the fuser unit P 16 19 A Fuser unit 2 Open the jam access cover of the fuser unit 3 Remove 2 screws one of the front side is a shoulder screw and take off the exit roller cover Fig 16 51 E ring 3 2 1 Transport guide Exit roller cover Shoulder screw ...

Page 375: ...bushing from the exit roller front side Fig 16 52 5 Remove E ring gear unit E ring and bush ing in order from the exit roller rear side Then take off the exit roller Fig 16 53 1 Take off the fuser unit P 16 19 A Fuser unit 2 Remove 2 screws and take off the jam access cover Fig 16 54 Bushing E ring Gear unit E ring E ring Exit roller Bushing Jam access cover ...

Page 376: ...discharge brush Note Be careful not to scratch the fuser belt Fig 16 56 1 Take off the SYS board case P 2 35 D SYS board case 2 Take off the flywheel P 9 9 A Developer motor drive unit 3 Take off the right rear cover P 2 30 O Right rear cover 4 Disconnect 2 connectors and 4 faston termi nal P 16 19 A Fuser unit 5 Remove 3 screws and take off the IH board cover Fig 16 57 Cover Discharge brush Screw...

Page 377: ...ake sure not to connect each IH con nection cable to the wrong position 2 Tighten 4 screws of the IH connection cable completely tightening torque 1 17 1 56 N m 3 Since the IH board is a highvoltage sec tion make sure to disconnect the power cable at maintenance Fig 16 59 1 Take off the IH board case P 16 34 N IH board IH IH board case 2 Remove 1 screw and take off the IH control board cooling fan...

Page 378: ...1 1 Take off the fuser unit P 16 19 A Fuser unit 2 Take off the IH board case P 16 34 N IH board IH IH board case 3 Disconnect 1 connector remove 1 screw and take off the exit motor Fig 16 62 Note When the exit motor is being installed install it by sliding the motor to the left side to nar row the distance between the shafts of the gear Fig 16 63 FLOW IH control board cooling fan Exit motor Conne...

Page 379: ...quipment A sheet of paper is switchbacked by the exit roller right after the printing operation fusing operation on one side is completed and the reversed sheet is transported to the registration section for the other side of the sheet to be printed The ADU mainly consists of the transport rollers and their drive system paper guide and ADU entrance exit sensor Fig 17 1 Paper guide Upper transport ...

Page 380: ...C DUPLEXING UNIT ADU 17 2 17 2 Construction Automatic Duplexing Unit ADU ADU motor M5 Stepping motor ADU clutch CLT7 ADU entrance sensor S38 ADU exit sensor S39 ADU opening closing switch S37 ADU driving PC board ADU Upper transport roller Middle transport roller Lower transport roller ...

Page 381: ...upper and middle transport roller When the ADU clutch CLT7 is turned ON the upper and middle transport roller starts rotating 3 ADU entrance sensor S38 This sensor detects input paper of the ADU transportation 4 ADU exit sensor S39 This sensor detects output paper of the ADU transportation 5 ADU opening closing switch S37 This switch detects whether the ADU is open or not 6 Upper transport roller ...

Page 382: ...U When the ADU motor M5 rotates to the direction A the upper transport roller is rotated driven by the gears and belt The ADU clutch CLT7 is then turned ON and the middle transport roller and lower transport roller are rotated Fig 17 2 ADU motor ADU clutch Upper transport roller Middle transport roller Lower transport roller A ...

Page 383: ...ex printing There are three methods of judging a paper jam 1 whether the ADU entrance sensor S38 is turned ON or not in a specified period of time after the switchback to the ADU started E510 2 whether the ADU exit sensor S39 is turned ON or not in a specified period of time after the ADU entrance sensor S38 is turned ON E520 3 whether the registration sensor S22 is turned ON or not in a specified...

Page 384: ...CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU 17 6 1 Single paper circulation With the paper larger than A4 LT size duplex printing back side printing front side printing is per formed for one sheet at a time as shown below Fig 17 3 ...

Page 385: ...IC DUPLEXING UNIT ADU 17 7 2 Double paper alternateness circulation With A4 LT size paper or smaller duplex printing is performed for two sheets at a time as shown below Back side of the 1st sheet Back side of the 2nd sheet Front side of the 1st sheet Front side of the 2nd sheet Fig 17 4 ...

Page 386: ...ler duplex printing is performed as shown below in a following order In case of 5 sheets Back side of the 1st sheet 2 Back side of the 2nd sheet 4 Front side of the 1st sheet 1 Back side of the 3rd sheet 6 Front side of the 2nd sheet 3 Back side of the 4th sheet 8 Front side of the 3rd sheet 5 Back side of the 5th sheet 10 Front side of the 4th sheet 7 Front side of the 5th sheet 9 Fig 17 5 ...

Page 387: ...028 9088 9349 10407 11192 12251 13031 14091 6010 6570 8558 9122 12130 12690 6374 8290 8930 11454 12498 13294 6120 6676 7024 7244 8668 9232 10376 10589 12240 12944 5587 6724 7087 7297 8139 9280 10439 10640 11707 12999 0 Equipment ADU Exit sensor Registration sensor Registration clutch ADU entrance sensor ADU exit sensor ADU clutch ADU motor unit msec 4344 6392 9316 11368 5200 7740 10172 3215 5289 8...

Page 388: ... rotation ON Specified time has passed Specified time has passed ADU motor ON ADU motor ON ADU clutch ON ADU transport jam E510 ADU transport jam E520 ADU motor stopped ADU entrance sensor ON ADU exit sensor check the arrival Trailing edge of first paper turned OFF the ADU exit sensor Specified time has passed Paper is transported to the first stopping position in ADU ...

Page 389: ...1 Yes No Yes No ADU paper feeding command signal received Registration sensor ON ADU motor stopped ADU clutch OFF ADU motor clutch ON Registration proceeded Registration operation completed ADU motor stopped ADU clutch OFF ADU feeding operation started Next paper is ready for the registration ADU misfeeding E110 A ...

Page 390: ...2 Take off the right rear hinge cover P 2 31 P Right rear hinge cover 3 Remove 1 screw M4 12 open the bypass tray and take off the bypass feed front cover Fig 17 8 4 Disconnect 1 connector and remove 1 screw fixing the ground wires 5 Remove 2 screws and take off the bracket Fig 17 9 6 Open the ADU Lift up the ADU a little and slide it to the rear side and take it off Fig 17 10 Bypass feed front co...

Page 391: ...side rear cover Fig 17 11 1 Take off the ADU P 17 12 A Automatic Duplexing Unit ADU 2 Take off the ADU inside rear cover P 17 13 B ADU inside rear cover 3 Disconnect the connector and release the latch to take off the ADU opening closing switch Fig 17 12 1 Take off the ADU inside rear cover P 17 13 B ADU inside rear cover 2 Disconnect 6 connectors from the ADU board Release 3 lock supports and tak...

Page 392: ...h S37 3 Remove 4 screws and take off the ADU cover Fig 17 14 1 Take off the ADU P 17 12 A Automatic Duplexing Unit ADU 2 Release the fulcrum on the front side and take off the paper guide Fig 17 15 1 Take off the ADU cover P 17 14 E ADU cover 2 Remove 1 E ring and disconnect 1 connec tor Then take off the ADU clutch Note When installing the E ring make sure that the latches of both ends of E ring ...

Page 393: ...tor M5 ADU drive unit 1 Take off the ADU clutch P 17 14 G ADU clutch CLT7 2 Remove the spring Fig 17 17 3 Remove 1 screw and take off the ADU rear latch Fig 17 18 4 Disconnect 1 connector Release the har ness from 2 harness clamps Remove 2 screws and take off the ADU drive unit Fig 17 19 Spring ADU rear latch ADU drive unit ...

Page 394: ...move 2 screws and take off the ADU motor Fig 17 20 6 Take off the timing belt and 1 E ring Then take off the gears from the ADU drive unit Fig 17 21 1 Take off the ADU drive unit P 17 15 H ADU motor M5 ADU drive unit 2 Remove 1 E ring on the rear side Then take off 1 pulley Fig 17 22 ADU motor Gear Gear Gear Timing belt E ring E ring Pulley ...

Page 395: ...3 1 Take off the ADU drive unit P 17 15 H ADU motor M5 ADU drive unit 2 Remove 2 clips 2 pulleys and 2 pins on the front side Then take off the timing belt Fig 17 24 3 Remove 1 E ring 1 clip and 1 bushing on the rear side 4 Take off 1 bushing on the front side Then take off the middle transport roller Fig 17 25 Bushing Bushing Clip Upper transport roller Pin Pin Clip Clip Pulley Belt Pulley Bushin...

Page 396: ...ove 2 clips 2 pulleys and 2 pins on the front side Then take off the timing belt Fig 17 26 4 Remove 1 clip and 1 bushing on the rear side 5 Remove 1 bushing on the front side Then take off the lower transport roller Fig 17 27 1 Take off the ADU cover P 17 14 E ADU cover 2 Disconnect 1 connector Release the latches and take off the ADU entrance sensor Fig 17 28 Pin Pin Clip Clip Pulley Pulley Belt ...

Page 397: ...ights reserved e STUDIO281c 351c 451c AUTOMATIC DUPLEXING UNIT ADU 17 19 M ADU exit sensor S39 1 Take off the ADU cover P 17 14 E ADU cover 2 Disconnect 1 connector Release the latches and take off the ADU exit sensor Fig 17 29 ADU exit sensor ...

Page 398: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU 17 20 ...

Page 399: ...put from outside to DC voltage and supplies it to each electric part The DC voltage is divided into the following two lines a Main line Power supply used in the entire equipment during image forming process Three kinds of voltage 3 3V 5 1V and 12V are output when the main switch of the equipment is turned ON b Cover switch line Power supply used in the entire equipment during image forming process...

Page 400: ... the 24V line does it may cause the damage of the electron device on each control circuit To prevent this the supply of these voltages stops after the PWR DN signal is output and the minimum retaining time 3 3VA 5 1VA 50 ms or more 12VA 5 ms or more elapses 3 Output protection Each output system includes an overcurrent and overvoltage protection circuits a fuse and internal protection circuit This...

Page 401: ...17 and 18 Output to the SLG board 2 5 1V 5 1VA CN464 Pins 21 22 23 and 24 Output to the SYS board 5 1VB CN464 Pin 19 Output to the SYS board 5 1VB CN466 Pin 1 Output to the LGC board PFP LCF via LGC board Bridge unit via LGC board 5 1VB CN467 Pins 5 and 6 Output to the RADF 5 1VB CN467 Pins 21 and 22 Output to the SLG board 5 1VB CN468 Pin 4 Output to the finisher 5 1VB CN469 Pin 5 Output to the F...

Page 402: ...put to the RADF 24VD4 CN467 Pins 10 12 and 14 Output to the SLG board 24VD5 CN468 Pin 2 Output to the finisher Output voltage by the type of connector Main switch line Cover switch line Connector Destination Voltage CN464 SYS board 3 3VA 3 3VB 5 1VA 5 1VB 12VA 12VB CN466 LGC board PFP LCF via LGC board Bridge unit via LGC board 3 3VB 5 1VB 12VB CN467 SLG board RADF 3 3VB 5 1VB CN468 Finisher 5 1VB...

Page 403: ...clutch Registration clutch Upper transport clutch high speed Upper transport clutch low speed Lower transport clutch high speed Lower transport clutch low speed Upper drawer feed clutch Lower drawer feed clutch ADU clutch Color developer toner supply clutch Color developer drive clutch Black developer drive clutch Black developer lifting clutch Transfer belt cleaner contact clutch Bypass pickup so...

Page 404: ...VD5 CN468 Finisher 24VD3 CN467 RADF 12VB CN464 SYS board 12VB CN471 FAX unit 24VD2 CN465 DRV board 3 3VB CN464 SYS board 3 3VB CN466 LGC board 3 3VB CN467 SLG board 5 1VB CN464 SYS board 5 1VB CN466 LGC board PFP LCF via LGC board Bridge unit via LGC board 5 1VB CN467 SLG board RADF 5 1VB CN468 Finisher 5 1VB CN469 FIL board 24VD1 CN465 LGC board Bridge unit via LGC board 24VD1 CN469 PFP LCF CN460...

Page 405: ... 95V or higher 3 2V or higher 200ms or lower 200ms or lower 10ms to 120ms 150ms or lower 3 2V or higher 4 95V or higher Lower limit of each rated voltage or higher 4 95V R V 5 1V 11 4V R V 12V 21 6V R V 24V 20ms or higher 4 95V or higher 3 2V or higher 10ms or higher 5ms or higher 10ms or lower 20ms or higher PWR DN 12VA PWR EN Linked with main switch 3 3VA Linked with main switch 5 1VA Linked wit...

Page 406: ...AC L MAIN AC N MAIN AC L MAIN AC N DOOR AC L DOOR AC IN YHM N AC IN YHM N AC IN YHM N AC IN L J650 DRM DH PS IH AC DC DC NF AC DC DC NF B A D C 1B 2B 1 2 3 6 6 5 4 3 2 1 1 4 2A 1A J469 J647 J460 J546 J643 J642 J644 J644 CN453 F1 F2 CN452 CN451 CN450 CN454 3 A B 1 3 2 2 1 A G F B C N GND L 1 2 3 4 CN493 CN433 Not used CN432 SG 5 1VB AC N AC L PWA F FIL 1 2 3 1 2 3 4 5 6 AC N AC L DH SCN L DH SCN N ...

Page 407: ...19 2005 2008 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c PC BOARDS 19 1 19 PC BOARDS 1 PWA F SYS Fig 19 1 ...

Page 408: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 19 2 2 PWA F LGC Fig 19 2 ...

Page 409: ...19 2005 2008 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c PC BOARDS 19 3 3 PWA F SLG Fig 19 3 4 PWA F CCD Fig 19 4 5 PWA F DRV Fig 19 5 ...

Page 410: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 19 4 6 PWA F LDR Fig 19 6 7 PWA F SNS Fig 19 7 8 PWA F ADU Fig 19 8 ...

Page 411: ...19 2005 2008 TOSHIBA TEC CORPORATION All rights reserved e STUDIO281c 351c 451c PC BOARDS 19 5 9 PWA F DSP Fig 19 9 10 PWA F KEY Fig 19 10 ...

Page 412: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 19 6 11 PWA F FIL Fig 19 11 ...

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