Toshiba e-STUDIO350 Service Manual Download Page 212

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e-STUDIO350/450 DEVELOPMENT SYSTEM

12 - 4

November 2003 © TOSHIBA TEC

IC52

CPU

IC38

NVRAM

IC54

ASIC GA

IC38

ASIC GA

IC51

TA8428

SYS board

Arithmetic and control unit

LGC board

Control panel

Developer unit

Toner density
signal

Control
voltage signal

Auto-toner sensor

Toner

Toner cartridge

Toner
motor

Developer material

Display panel

IC24

MAIN

CPU

IC2

D/A

converter

12.4 Auto-Toner Circuit

12.4.1 General description

(1)

Function of the auto-toner circuit

· Detects the toner density in the developer material, and supplies toner when the density is lowered

to a certain level.

· Detects that there is no toner left in the cartridge (toner-empty detection).

(2)

The auto-toner circuit consists of the following:

· Auto-toner sensor

: Detects the toner density.

· Control section

: Controls the toner density so that the toner in the developer material is fixed

to certain ratio.

· Toner motor

: Supplies toner to the developer material.

· Display

: Indicates toner-empty information.

Fig. 12-401

Summary of Contents for e-STUDIO350

Page 1: ...MULTIFUNCTIONAL DIGITAL SYSTEMS e STUDIO350 450 File No SME03002800 R03092140700 TTEC Ver00 2003 11 ...

Page 3: ... 80 cm 32 on the right and 10 cm 4 in the rear The socket outlet shall be installed near the equipment and shall be easily accessible 2 Service of Machines Basically be sure to turn the main switch off and unplug the power cord during service Be sure not to touch high temperature sections such as the exposure lamp the fuser unit the damp heater and their periphery Be sure not to touch high voltage...

Page 4: ... recommended by Toshiba TEC Corporation 4 Cautionary Labels During servicing be sure to check the rating plate and the cautionary labels such as Unplug the power cord during service Hot area Laser warning label etc to see if there is any dirt on their surface and whether they are properly stuck to the equipment 5 Disposition of Consumable Parts Packing Materials Used batteries and RAM ICs Regardin...

Page 5: ...ls of Copying Process 3 2 3 3 Comparison with DP4500 3500 3 10 4 GENERAL OPERATION 4 1 4 1 Overview of Operation 4 1 4 2 Description of Operation 4 1 4 2 1 Warming up 4 1 4 2 2 Ready state ready for copying 4 2 4 2 3 Drawer feed copying Upper drawer paper feeding 4 2 4 2 4 Bypass feed copying 4 5 4 2 5 Interruption copying 4 5 4 3 Detection of Abnormality 4 6 4 3 1 Types of abnormality 4 6 4 3 2 D...

Page 6: ... 6 5 1 Opto electronic conversion 6 11 6 5 2 Shading correction 6 11 6 6 Automatic Original Size Detection Circuit 6 12 6 6 1 Principle of original size detection 6 12 6 6 2 Process of detection of original size 6 12 6 7 Disassembly and Replacement 6 16 7 IMAGE PROCESSING 7 1 7 1 General Description 7 1 7 2 Configuration 7 3 7 3 SLG Board PWA F SLG 360 7 4 7 3 1 Features 7 4 7 3 2 Functions of ima...

Page 7: ...1 2 Functions 11 2 11 3 Output Control Circuits of High Voltage Transformer 11 5 11 3 1 Overview 11 5 11 3 2 Description of operations 11 5 11 4 Drum Temperature Detection Circuit 11 7 11 5 Temperature Humidity Sensor 11 8 11 5 1 General description 11 8 11 5 2 Construction 11 8 11 6 Disassembly and Replacement 11 9 12 DEVELOPMENT SYSTEM 12 1 12 1 Configuration 12 1 12 2 Functions 12 2 12 3 Drive ...

Page 8: ...3 13 13 5 Control Circuit of Exit Motor 13 15 13 6 Exit Motor Drive 13 15 13 7 Disassembly and Replacement 13 16 14 AUTOMATIC DUPLEXING UNIT ADU 14 1 14 1 General Description 14 1 14 2 Description of Operations 14 2 14 3 Drive of ADU 14 8 14 4 Flow Chart 14 9 14 5 Disassembly and Replacement 14 11 15 POWER SUPPLY UNIT 15 1 15 1 Construction 15 1 15 2 Operation of DC Output Circuits 15 1 15 3 Outpu...

Page 9: ... 50 to105 g m2 13 to 28 lb Bond Carbon paper are not acceptable either Maximum size A3 LD Copy speed Copies min means Not acceptable The copy speed in the above table are available when originals are manually placed for single side multiple copying When the RADF is used the copy speed of 35 45 sheets per minute is only available under the following conditions Original Mode Single side original A4 ...

Page 10: ...he actually measured value Upper drawer is selected and copying is at the non sort mode Automatic copy density APS AMS are turned off Finisher is not installed Copy paper Drawer ADU PFP LCF Bypass copy Remarks Size A3 to A5 R A3 to A5 R LD to ST R LD to ST R A4 LT Non standard or user specified sizes can be set Weight 64 to 209 g m2 17 to 55 lb 64 to 105 g m2 Continuous feeding 17 to 28 lb 50 to 2...

Page 11: ... Stack height 11 mm equivalent to 100 sheets 64 to 80 g m2 17 to 22 lb 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 16mm 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 de...

Page 12: ...e STUDIO350 450 SPECIFICATIONS 1 4 November 2003 TOSHIBA TEC 1 Dimensions of the equipment See the figure below W660 x D718 x H739 mm Fig 1 101 When the tilt angle of the control panel is 45 degrees ...

Page 13: ...tup report 1 set for NAD and MJD Customer satisfaction card 1 pc for MJD PM sticker 1 pc for MJD Drum installed inside of the equipment 1 pc Toner bag 1 pc Toner cartridge 1 pc except for NAD MJD Developer material 1 pc except for NAD MJD Operation panel stopper 1 pc Blind seal 4 pcs Rubber plug 4 pcs CD ROM 5 pcs Machine version NAD North America MJD Europe AUD Australia ASD Asia TWD Taiwan SAD S...

Page 14: ...dge Kit KN 3520 C Job Separator MJ 5004 C Offset Tray MJ 5005 C Key Counter MU 8 MU 10 Work Tray KK 3511 Damp Heater MF 3520 U E Fax Board GD 1150 NA AU EU TW C AS 2nd Line for Fax Board GD 1160 NA EU TW C Wireless LAN Adapter GN 1010 PCI Slot GO 1030 Scrambler Board GP 1030 Printer Kit GM 1010 Printer Scanner Kit GM 2010 Scanner upgrade Kit GM 3010 Desk MH 1700 1 N North America E Europe F France...

Page 15: ...7 e STUDIO350 450 SPECIFICATIONS 1 1 4 Supplies Drum OD 3500 Toner bag PS TB3520 E N 2 Toner cartridge PS ZT3520 T D C E 3 Developer D 3500 2 N Asia E Europe NONE North America 3 T Taiwan D Asia C China E Europe NONE North America ...

Page 16: ...Slot GO 1030 FAX Board GD 1150 NA AU EU TW C AS 2nd Line for FAX Board GD 1160 NA EU TW C Wireless LAN Adapter GN 1010 Damp Heater MF 3520 U E Printer Kit GM 1010 Desk MH 1700 Drawer Module MY 1021 Large Capacity Feeder LCF KD 1012 A4 LT Paper Feed Pedestal PFP KD 1011 Printer Scanner Kit GM 2010 Scanner Upgrade Kit GM 3010 Staple Cartridge STAPLE 2000 Hole Punch Unit MJ 6004 N E F S Staple Cartri...

Page 17: ...TLINE OF THE MACHINE 2 1 Sectional View Fig 2 101 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 59 57 58 60 61 62 63 64 65 67 66 68 69 70 71 72 13 14 15 19 20 21 ...

Page 18: ...ypass tray 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Bypass paper sensor Bypass feed sensor Temperature humidity sensor Transfer charger Separation charger Drum Developer unit Cleaning blade Recovery blade Main charger Discharge LED Dr...

Page 19: ...November 2003 TOSHIBA TEC 2 3 e STUDIO350 450 OUTLINE OF THE MACHINE 2 Fig 2 102 3 2 5 4 7 6 9 8 15 14 17 16 28 13 12 11 10 20 21 19 18 23 22 25 24 26 27 26 1 ...

Page 20: ...drive clutch Main motor Exit motor Toner bag full detection sensor 1 ADU opening closing switch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Fuser unit cooling fan Registration clutch ADU motor ADU clutch Bypass pickup solenoid Bypass feed clutch Side cover opening closing switch Transport clutch High speed Transport clutch Low speed Lower drawer feed clutch Tray up m...

Page 21: ...LINE OF THE MACHINE 2 2 2 Electric Parts Layout A Unit construction Fuser unit Front side Laser unit PC board unit Fig 2 201 Scanner unit Drive unit Control panel unit Automatic duplexing unit Bypass unit Process unit Paper feeder unit Transport unit ...

Page 22: ...450 OUTLINE OF THE MACHINE 2 6 November 2003 TOSHIBA TEC 2 B Scanner unit B 1 Motor sensor lamp LT series Fig 2 202 2 A4 series Fig 2 202 1 Front side M1 S7 S6 EXP S3 S2 S1 S5 S4 Front side M1 S7 S6 EXP S3 S2 S5 S4 ...

Page 23: ...DIO350 450 OUTLINE OF THE MACHINE 2 C Control panel unit Front side Fig 2 204 LCD KEY DSP B 2 PC board heater thermostat other part Fig 2 203 ASD AUD CND SAD TWD models Standard NAD MJD models Option Front side INV THMO2 DH1 DH2 CCD SLG ...

Page 24: ...C 2 D Process unit D 1 Motor sensor switch PC board D 2 Motor sensor lamp heater thermistor thermostat Fig 2 206 ASD AUD CND SAD TWD models Standard NAD MJD models Option Fig 2 205 Front side ERS THM3 PS THMO3 M16 S11 DH3 Front side S9 LRL M8 S8 S32 S30 S31 S12 M9 S10 ...

Page 25: ...November 2003 TOSHIBA TEC 2 9 e STUDIO350 450 OUTLINE OF THE MACHINE 2 E Laser unit Fig 2 207 Front side SNS LDR M2 F Paper feeder unit Fig 2 208 Front side CLT2 CLT1 S20 S22 S21 S23 S16 S18 S17 S19 ...

Page 26: ...e STUDIO350 450 OUTLINE OF THE MACHINE 2 10 November 2003 TOSHIBA TEC 2 H Bypass unit G Transport unit Fig 2 209 Front side M10 S13 S14 S33 S15 M11 Front side Fig 2 210 SFB CLT3 SOL1 S25 S24 ...

Page 27: ...mber 2003 TOSHIBA TEC 2 11 e STUDIO350 450 OUTLINE OF THE MACHINE 2 J Fuser unit Fig 2 212 Front side I Automatic duplexing unit S26 S27 Fig 2 211 ADU M3 CLT4 S28 Front side IH COIL THM1 THM2 M12 THMO1 S29 ...

Page 28: ...e STUDIO350 450 OUTLINE OF THE MACHINE 2 12 November 2003 TOSHIBA TEC 2 K Drive unit Front side Fig 2 213 M6 CLT8 HVT M7 CLT7 CLT6 CLT5 M14 M5 M4 IH M13 M15 ...

Page 29: ... TOSHIBA TEC 2 13 e STUDIO350 450 OUTLINE OF THE MACHINE 2 L PC board unit Fig 2 214 NAD SAD TWD models FIL Standard ASD AUD CND models FUS Standard MJD model FUS Option Front side SYS LGC BRK NF NIC HDD FIL or FUS ...

Page 30: ...Driving the carriages Driving the polygonal mirror Driving the automatic duplexing unit Driving the exit roller Driving the drum developer unit fuser unit registration roller transport rollers feed rollers and pickup rollers Driving the lifting movement of trays in upper lower drawer Supplying the toner Cooling down the laser unit Cooling down the inside of the equipment Exhausting ozone Assisting...

Page 31: ...detection of platen cover or RADF Toner cartridge presence absence detection Detecting if the used toner is full in the toner bag Detecting the presence absence of the toner bag Used toner amount defection in the toner bag Detecting the density of toner in the developer unit Detecting the temperature and humidity inside of the equipment Detecting the paper transport at the registration roller sect...

Page 32: ... absence of the upper drawer Detecting presence absence of the lower drawer Detecting presence absence of paper on the bypass tray Detecting the transporting paper fed from the bypass tray Automatic duplexing unit opening closing detection Detecting the transporting paper at automatic duplexing unit entrance section Detecting the transporting paper in automatic duplexing unit Detecting the transpo...

Page 33: ...clutch DEV CLK Developer drive clutch CST TR L CLT Transport clutch Low speed CST TR H CLT Transport clutch High speed Function Driving the upper drawer pickup roller Driving the lower drawer pickup roller Driving the bypass pickup roller and bypass feed roller Driving the automatic duplexing unit Driving the registration roller Driving the magnetic roller of the developer unit Driving the transpo...

Page 34: ...S Fuse PC board FUS board Function Controlling CCD and outputting the analog signal Controlling the original scanning section and RADF Controlling LCD and the touch panel on the control panel Detecting the button entry and controlling LED on the control panel Relaying the control signals of the laser unit Driving the laser diode Detection of the laser beam position Detection of the bypass tray sli...

Page 35: ...rum damp heater Symbol EXP ERS IH COIL DH1 DH2 DH3 P I P21 I6 P25 I33 P31 I23 P10 I22 P10 I32 P27 I7 Remarks B 1 D 2 J B 2 B 2 D 2 6 Lamps and heaters 7 Thermistors and thermostats Name THMS C HTR Main thermistor THMS S HTR Edge thermistor THMS DRM Drum thermistor THERMO FSR Fuser thermostat THERMO SCN DH Scanner damp heater thermostat THERMO DRM DH Drum damp heater thermostat Symbol THM1 THM2 THM...

Page 36: ...nerating DC voltage and supplying it to each section of the equipment Storing the program data and image data Cutting noise of AC power Preventing the inflow of overcurrent to the equipment P I P21 I7 P3 I19 P9 I7 P7 I25 P6 I13 P6 I14 Remarks B 2 C D 2 L L L Symbol HVT Name PS HVT High voltage transformer Function Generating high voltage and supply ing it to the following sections Main charger wir...

Page 37: ...d jig Download jig IPC PFP LCF RADF ADU Motors HVT Clutches Sensors Solenoids Switches Bypass unit Key copy counter Copy key card Finisher Bridge unit Job separator Offset tray Bus transceiver Bus transceiver I O Finisher Control panel PCI external slot USB connector host 1 USB connector device USB connector host 2 RS 232C Parallel port IEEE 1284 HDD NCU LINE 1 NCU LINE 2 NIC Dongle Dongle Modem F...

Page 38: ...rd SLG board This is the board to mainly control the scanning function scanner unit and consists of the Scanner CPU ASIC memory Flash ROM and SRAM A D converter driver for motor drive etc When scanning the original the exposure lamp and scan motor are driven by the command from the Scanner CPU The analog signal output from the CCD board is then converted to digital signal by the A D converter Imag...

Page 39: ...generate the electric power for driving the IH coil of the fuser unit from the AC electric power input via the switching power supply And then it is provided SYS board This is the main board taking a leading part in all systems It consists of the System CPU ASIC memory DIMM SDRAM Flash ROM SRAM NVRAM RTC Real Time Clock IC etc The Sys tem CPU controls each ASIC to perform the control of the image ...

Page 40: ...condensation prevention of each section scanner and drum FUS board This is the board to provide the AC electric power for driving to the damp heater for preventing of the condensation of each section scanner and drum HVT This is the board to generate the DC high voltage from 24V to provide the bias to the section of the main charger developer transfer and separation PS ACC This is the unit to gene...

Page 41: ...1 Fig 2 503 2 5 Installation and Replacement of Covers and PC boards 2 5 1 External covers A Front cover 1 Open the front cover 2 Remove the toner bag 3 Pull up the hinge pin and extract it 4 Take off the front cover B Front left cover 1 Open the front cover 2 Remove 1 screw and front left cover Guide ...

Page 42: ...ar cover 1 Remove 7 screws and take off the rear cover D Left upper cover 1 Remove 2 screws and take off the left upper cover E Front upper cover 1 Take off the left upper cover Chapter 2 5 1 D 2 Remove 2 screws and take off the front upper cover F Right upper cover 1 Remove 3 screws and take off the right upper cover ...

Page 43: ...ray I Tray back cover 1 Take off the receiving tray Chapter 2 5 1 H 2 Remove 1 screw and take off the receiving tray back cover J Left cover 1 Remove 3 screws and take off the left cover G Upper rear cover 1 Take off the RADF or platen cover 2 Take off the left upper cover Chapter 2 5 1 D 3 Take off the right upper cover Chapter 2 5 1 F 4 Remove 2 screws and upper rear cover ...

Page 44: ... Remove 3 screws and take off the left rear cover M Right front hinge cover 1 Pull out the upper and lower drawers 2 Remove 2 screws and take off the right front hinge cover N Right rear hinge cover 1 Remove 2 screws and take off the right rear hinge cover L IH terminal cover 1 Open the ADU jam access cover and fuser unit cover 2 Remove 2 screws and take off the IH terminal cover ...

Page 45: ...apter 2 5 1 N 4 Remove 2 screws and take off the right rear cover O Right lower cover 1 Take off the right rear hinge cover Chapter 2 5 1 N 2 Remove 2 screws and take off the right lower cover Q Front right cover 1 Take off the front cover Chapter 2 5 1 A 2 Take off the receiving tray Chapter 2 5 1 H 3 Take off the right upper cover Chapter 2 5 1 F 4 Take off the upper drawer Open the bypass tray ...

Page 46: ...8 screws and take off the LGC board cover 3 Disconnect 15 connectors and 1 connector with lock 4 Remove 4 screws and release 2 locking sup ports Then take off the LGC board A 2 LGC board unit 1 Take off the rear cover Chapter 2 5 1 C 2 Loosen 8 screws and take off the LGC board cover 3 Disconnect 15 connectors 1 connector with lock and 1 joint connector fixed to the case Fig 2 520 Lock connector L...

Page 47: ... on the case 5 Remove 5 screws and take off the LGC board with the whole case Fig 2 524 Fig 2 525 B Hard disk 1 Take off the rear cover Chapter 2 5 1 C 2 Loosen 9 screws and take off the SYS board upper cover Fig 2 526 Fig 2 527 3 Disconnect 2 connectors 4 Loosen 5 screws and take off the hard disk with the whole SYS board lower cover ...

Page 48: ... 4 Release all the harnesses from harness clamps and holders on the case Fig 2 528 5 Remove 4 screws and take off the hard disk Fig 2 529 Fig 2 530 Fig 2 531 1 Take off the rear cover Chapter 2 5 1 C 2 Take off the hard disk with the whole SYS board lower cover Chapter 2 5 2 B 3 Disconnect 4 connectors C System control PC board SYS board ...

Page 49: ...t side of the bracket 3 Disconnect 3 connectors while the switching power supply is pulled out to the front and take off the switching power supply Fig 2 533 Fig 2 532 Fig 2 534 6 Remove 12 screws take off the NIC board and SYS board SYS board NIC board E Power supply cooling fan 1 Take off the left cover Chapter 2 5 1 J 2 Remove 2 screws and take off the power sup ply cooling fan on the switching...

Page 50: ...ews and release 2 locking sup ports Then take off the high voltage trans former Note When installing make sure to match the col ors of connectors and harnesses according to the color instruction on the board Fig 2 537 G Noise filter 1 Take off the rear cover and right lower cover Chapter 2 5 1 C O 2 Disconnect 4 connectors Remove 1 screw and 1 washer Then take off the noise filter White Black ...

Page 51: ...HINE 2 Fig 2 601 2 6 Options A MR 3015 Reversing Automatic Document Feeder RADF 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover 3 Disconnect the connector 4 Remove 2 screws on the rear side Fig 2 602 Fig 2 603 Fig 2 604 5 Open the RADF ...

Page 52: ...ff by lift ing it up B KD 1011 Paper Feed Pedestal PFP 1 Turn OFF the power and unplug the power cable 2 Remove 7 screws and take off the rear cover of the equipment Note Disconnect the connector of the RADF first when the RADF is installed 3 Remove 1 screw and the ground wire and then disconnect 2 connectors 3 if the optional damp heater is installed Connector of optional damp heater ...

Page 53: ...609 4 Remove 2 screws and take off 2 fixing brack ets on the rear side 5 Take off the lower drawer of the equipment and PFP upper drawer 6 Remove 4 screws and take off 2 fixing brack ets on the front side 7 Lift up the equipment and take off the PFP Fig 2 610 Fig 2 611 Fig 2 612 ...

Page 54: ... 2 Remove 7 screws and take off the rear cover of the equipment Note Disconnect the connectors of the RADF first when the RADF is installed 3 Remove 1 screw and the ground wire and then disconnect 2 connectors 3 if the optional damp heater is installed 4 Remove 2 screws and take off 2 fixing brack ets on the rear side 5 Take off the lower drawer of the equipment Connector of optional damp heater ...

Page 55: ...BA TEC 2 39 e STUDIO350 450 OUTLINE OF THE MACHINE 2 Fig 2 617 Fig 2 618 Fig 2 619 6 Pull out the LCF drawer 7 Remove 4 screws and take off 2 fixing brack ets on the front side 8 Lift up the equipment and take off the LCF ...

Page 56: ... finisher D 1 When PFP LCF is not installed 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector 3 Remove 2 screws and take off the safety bracket on the rear side and the cover 4 Remove 2 screws and take off the safety bracket on the front side and the cover 5 Remove 2 screws ...

Page 57: ...Fig 2 627 6 Lift up the finisher and take it off D 2 When PFP LCF is installed 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector 3 Remove 2 screws and take off the cover on the rear side 4 Remove 2 screws and take off the cover on the front side ...

Page 58: ... 628 Fig 2 629 Fig 2 630 Fig 2 631 5 Remove 2 screws 6 Lift up the finisher and take it off 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 3 Remove 1 screw and take off the finisher lower cover ...

Page 59: ...STUDIO350 450 OUTLINE OF THE MACHINE 2 Fig 2 632 Fig 2 633 Fig 2 634 Fig 2 635 4 Remove 3 screws and take off the finisher front cover 5 Remove 1 screw 6 Remove 1 screw and take off the cover of the finisher rear side 7 Remove 1 screw ...

Page 60: ...isher Note Be careful not to fell the finisher when moving the finisher unit only F MJ 1024 Console finisher 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect the connector 3 Open the finisher front cover and remove 1 screw 4 Remove 1 screw and take off the cover of the finisher rear side ...

Page 61: ... 5 Remove 1 screw 6 Take off the finisher Note Be careful not to fell the finisher when moving the finisher unit only G MJ 6004 Hole punch unit 1 Turn OFF the power and unplug the power cable 2 Take off the connector cover and disconnect connector 3 Open the front cover of the hole punch unit and remove 1 screw ...

Page 62: ... THE MACHINE 2 46 November 2003 TOSHIBA TEC 2 2 Fig 2 644 Fig 2 645 Fig 2 646 Fig 2 647 4 Take off the cover of the punch unit lower side 5 Remove 1 screw 6 Remove 3 screws and take off the punch unit rear cover 7 Remove 1 screw ...

Page 63: ... MACHINE 2 Fig 2 648 Fig 2 649 Fig 2 650 Fig 2 651 8 Take off the finisher with the hole punch unit Note Be careful not to fell the finisher when moving the finisher unit only 9 Disconnect 2 connectors 10 Remove 2 screws 11 Lift up the punch unit and take it off ...

Page 64: ...g 2 652 Fig 2 653 Fig 2 654 Fig 2 655 H KN 3520 Bridge unit 1 Turn OFF the power and unplug the power cable 2 Remove 2 screws and take off the cover 3 Disconnect 1 connector 4 Open the bridge unit Remove 1 screw and take off the cover 5 Close the bridge unit and remove 1 screw ...

Page 65: ... 657 Fig 2 658 Fig 2 659 6 Remove 4 screws and take off the bracket 7 Lift up the bridge unit and release the hook Take off the bridge unit toward the front I MJ 5004 Job separator 1 Turn OFF the power and unplug the power cable 2 Take off the tray 3 Remove 2 screws and take off the cover ...

Page 66: ...2 50 November 2003 TOSHIBA TEC 2 2 Fig 2 660 Fig 2 661 Fig 2 662 4 Disconnect 2 connectors 5 Loosen 2 screws and take off the cover 6 Remove 1 screw 7 Lift up the job separator and release the hook Take off the job separator toward the front ...

Page 67: ...E OF THE MACHINE 2 Fig 2 664 Fig 2 665 Fig 2 666 3 Remove 2 screws and take off the cover 4 Disconnect 2 connectors 5 Remove 1 screw and take off the cover Fig 2 663 J MJ 5005 Offset tray 1 Turn OFF the power and unplug the power cable 2 Take off the tray ...

Page 68: ...e STUDIO350 450 OUTLINE OF THE MACHINE 2 52 November 2003 TOSHIBA TEC 2 2 Fig 2 667 6 Remove 1 screw 7 Lift up the offset tray and release the hook Take off the offset tray toward the front ...

Page 69: ... Separates paper with the toner image from the photoconductive drum È 9 Fusing Fuses the toner image onto the pa per by applying heat and pressure È 10 Cleaning Scrapes off the residual toner from the drum È 11 Discharging Eliminates the residual nega tive charge from the surface of the photoconductive drum Original exposure Xenon lamp 16W Data reading scanning CCD 600 dpi 7400 pixel Image process...

Page 70: ... drum corre sponding to black areas of the original are eliminated while the areas on the drum corre sponding to white areas retains the negative charge As this image on the drum formed by the nega tive potential is not visible it is called an elec trostatic latent image 2 Charging Charging is the process to apply charge evenly on the drum surface The charger wire produces negative corona discharg...

Page 71: ...n 4 Data writing Data writing is the process of converting the image signals sent from the image process ing section into optical signal and exposing the drum surface with the light Semiconductive laser element converts image signals transmitted from the image process ing section into optical signal laser emission to expose the drum surface and form an elec trostatic latent image on it Image proce...

Page 72: ...eloper bias which is applied to the magnetic roller reverse de velopment method Drum Magnetic roller Fig 3 207 Photoconductive layer Magnet Magnetic roller Toner Carrier always attracted onto the magnet Toner Bias voltage 550 VDC Photocon ductive drum Aluminum base Toner Fig 3 208 The potential of the photoconductive drum is higher than the developer bias The potential of the photoconductive drum ...

Page 73: ...terial is used for a long time be yond its normal life span the toner is caked onto the carrier È The charging performance of the carrier is lowered Symptom 1 Image density is lowered 2 Toner scattering occurs 3 Background fogging occurs Solution Replace the developer material Magnetic roller Magnetic brush development The south and north poles are arranged inside the magnetic roller as shown in t...

Page 74: ... Size and density of originals 3 The existence of solid black when making prints when a book is copied and the original cover is partially opened 4 Temperature and humidity in the room when making prints 5 Prints density and image quality mode As indicated in the figure below the life of the toner cartridge varies depending on the copy mode and coverage of originals 6 A full block in the figure be...

Page 75: ...he paper is normally 286 µA DC However to improve trans ferability at the trailing edge of the paper lower output 137 µA DC is applied to the part 10 mm from the trailing edge 7 Separation Separation is the process of separating paper which is temporaily adhering to the drum due to the static electricity during the transfer pro cess Method Apply AC voltage to which the nega tive DC bias is added t...

Page 76: ...eat Toner is melted by the heat of the surface of the fuser roller Pressure The pressure roller is pressed against the fuser roller by the springs to increase the adherence of the melted toner onto the paper Heat and pressure are applied to the paper when it passes between the fuser roller and pressure roller Fusing The toner is fused on the paper Separation finger Drum rotation Paper movement Sep...

Page 77: ... drum before the next charging process If the residual charge is not eliminated the fol lowing phenomenon occurs Uneven charge is applied to the drum during the next printing The next print will have a double image The preceding image appears Solution The entire surface of the photoconductive drum is illuminated with light by the discharge LED array The photoconductive drum becomes electri cally c...

Page 78: ... V Scorotron method 790 V Semiconductor laser Adjustment not required 4 0 nJ mm2 One magnetic roller Magnetic bridge circuit method Toner cartridge Density detection method T 3500 T 3500E T 3500D D 3500 DC 550 V Adjustable output during printing DC 150 V Fixed others Adjustable output Constant current 580 V Adjustment not required AC Adjustable output Constant voltage DC Adjustment not required Ex...

Page 79: ...ing system The carriage moves to the home position The carriage moves to the peak detection position The exposure lamp is turned ON Peak detection white color is detected by the shading correction plate The exposure lamp is turned OFF READY WARMING UP is displayed 2 Pre running operation The pre running operation is started when the temperature of the fuser roller surface reaches a certain tempera...

Page 80: ...per bias and discharge LED ON Fans are rotated in high speed Drawer feed clutch ON The pickup roller feed roller separation roller and transport roller start to rotate Paper reaches the upper drawer feed sensor The upper drawer feed sensor is turned ON Paper reaches the registration roller The registration sensor is turned ON and aligning is performed Drawer feed clutch OFF after a certain period ...

Page 81: ... Exit sensor detects the trailing edge of the paper Main charger developer bias and discharge LED OFF Polygonal motor main motor and exit motor OFF Drum fuser unit and developer unit stop Fans return to the ready rotation READY is displayed and the equipment enters the ready mode ...

Page 82: ...6 402 154 458 1658 1714 154 0 4156 1710 2296 1000 1500 2000 2500 3000 3500 4000 4500 5000 Timing chart for copying one A4 size sheet fed from the upper drawer Scanner motor Exposure lamp Main motor Upper drawer feed clutch Upper drawer feed sensor Registration sensor Registration clutch MVDEN signal Main charger Developer bias Discharge LED Exit sensor ms rev fwd ...

Page 83: ...ger developer bias and discharge LED ON Fans are rotated in high speed Bypass feed clutch ON The bypass pickup roller and bypass feed roller start to rotate The bypass pickup roller is lowered Aligning operation Paper reaches the registration roller After a certain period of time the bypass feed clutch OFF 4 Hereafter the operation 3 through 6 of 4 2 3 Drawer feed copying is repeated 4 2 5 Interru...

Page 84: ...feed in bypass B Abnormality not cleared without turning OFF the door switch 1 Misfeed in equipment 2 Add toner 3 Developer unit not installed properly 4 Toner bag replacement C Abnormality not cleared without turning OFF the main switch 1 Call for service 3 After the interruption copying is finished LED INTERRUPT OFF by pressing the INTERRUPT button Equipment returns to the status before the inte...

Page 85: ... Drawer empty sensor detects the presence or absence of paper When drawer is not installed No drawer detected Tray not going up drawer empty sensor OFF Add paper displayed START button disabled When drawer is installed Drawer detected Tray going up drawer empty sensor OFF Add paper displayed START button disabled ...

Page 86: ...resence absence of paper Cleared by turning the power ON OFF Tray up sensor is turned ON in a fixed period of time The tray motor stops At this time if the empty sensor is ON It is judged that there is paper OFF It is judged that there is no paper Drawer area of the illustration blinks When the drawer is selected When the paper in the drawer runs out during copying The tray up sensor turned OFF Th...

Page 87: ...ray A 3 Set key copy counter When the key copy counter optional is pulled out from the equipment which installs it Set key copy counter displayed Copying operation disabled When the counter is pulled out during copying Copying is stopped when the key copy counter is pulled out B 1 Misfeed in equipment Exit sensor detects jamming of the leading edge of paper Registration clutch ON Less than 1 056 s...

Page 88: ...ed during copying Paper jam E410 Registration sensor detects jamming of the leading edge of paper Registration sensor is not turned ON in a fixed period of time after the leading edge of paper passed the transport roller Paper jam E120 E200 E210 E300 E330 and E3C0 During paper feeding from ADU Registration sensor is not turned ON in a fixed period of time after the ADU clutch is turned ON Paper ja...

Page 89: ...ot installed properly Disconnection of the connectors of the developer unit Developer unit not installed is displayed Solution Connect the connectors of the developer unit and close the front cover B 4 Dispose of used toner Toner bag becomes full of toner Toner recovery auger shifts to the rear side Toner bag full detection sensor 1 ON or Toner bag detection sensor 2 ON Dispose of used toner is di...

Page 90: ...NO NO NO NO NO YES YES YES YES Call for service YES YES YES C260 C270 C280 Main switch ON DC power ON Restart Cover is open IH coil ON Paper jam Registration sensor ON Scan motor ON Home position detected Peak detected 2 5 seconds elapsed Call for service Exit sensor ON ADU entrance exit sensors ON Upper drawer feed sensor ON Lower drawer feed sensor ON ...

Page 91: ...er roller reached ready temp Main motor OFF READY YES Call for service YES Call for service IH coil broken YES Polygonal motor in abnormal condition Call for service NO NO NO NO C410 C430 C440 CA10 YES IH error Call for service NO C470 C480 C490 Thermistor broken Temperature of the fuser roller ready for pre running ...

Page 92: ...Processing system control completed H Sync OK Processing system control Call for service Polygonal motor normal rotation CA10 Transfer charger ON Transfer charger OFF Feed clutch ON Feed clutch OFF Registration clutch ON Counter ON OFF Registration clutch OFF Call for service Laser OFF C Scanning system control Exposure lamp ON Carriages move forward Carriages stopped Exposure lamp OFF Carriages m...

Page 93: ... STUDIO350 450 GENERAL OPERATION 4 OK NG C Polygonal motor OFF Main charger OFF Discharge LED OFF Developer bias OFF Exit motor OFF READY Drum rotation reversed Main motor OFF Paper jam E020 Exit sensor detected trailing edge of paper ...

Page 94: ...e STUDIO350 450 GENERAL OPERATION 4 16 November 2003 TOSHIBA TEC 4 ...

Page 95: ...odes 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 condition of the equipment in the LCD panel This equipment has a movable control panel which enables to adjust its angle to the operator It also has improved its operatability and visibility with the enlarged LCD panel Control ...

Page 96: ...e STUDIO350 450 CONTROL PANEL 5 2 November 2003 TOSHIBA TEC 5 5 2 Items Shown on the Display Panel Fig 5 201 Fig 5 202 ...

Page 97: ...ning is enabled Press START button or FUNCTION button to clear Press START button to clear Auto Start can be set Press STOP button to clear the Auto Start Recovers when the toner supply has finished Recovers when the image quality control has finished Press START button to resume copying or press MEMORY CLEAR button to delete the job When the bridge unit is installed Resumes printing by removing p...

Page 98: ...CF cover is open when feeding from LCF is set RADF is open when original is placed on RADF Key copy counter not inserted Displayed when the conditions are set and START button is pressed with no original placed Displayed when the direction of original placed is different from the setting Paper jam occurred during copying RADF scanning Displayed when the paper in selected drawer is running out Disp...

Page 99: ...e punching Displayed when the paper sizes are mixed at Staple Sorting Mode Displayed when the paper size is not specified for stapling at Staple Sorting Mode Finisher is full of papers Trouble in the stapler unit in finisher No stapler in finisher section No stapler in saddle stitch unit Interrupt copying is accepted Interrupt copying is cancelled finished Place the blank sheets in bypass tray and...

Page 100: ... when the printing is stopped because of media type mismatch Dsiplays the warning that the copy is not enabled when any drawer but bypass feed is selected at Cover Sheet Mode or Sheet Insertion Mode Set the reproduction ratio 200 or below manually Set the reproduction ratio 200 or below Displayed only in FAX Function Displayed only in FAX Function Displayed only in FAX Function Displayed only in S...

Page 101: ...in the equipment Displayed when motor sensor switch etc do not work properly Displayed when the Department Code can no be keyed in immediately after power ON Displayed when the paper size which is not acceptable is set depends on the setting Remove the paper in the equipment according to the messages displayed on the panel Turn OFF the power and solve the problem then turn ON the power Leave it fo...

Page 102: ...ed Display not changed Display not changed Printing out the copy Display not changed Displays department code entry screen when department management is available Displays print job list screen Display not changed LED blinking Copy mode is cleared after the copy mode is set Printing out stops and READY Press START to copy and MEMORY CLEAR are displayed Number of printouts changes to 1 while the se...

Page 103: ...ssive 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 640 x 240 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 Fig 5 401 Fig 5 402 ...

Page 104: ...s from the 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 from the System control PC board LOAD FRAME LOAD 240 1 2 240 CP x 640 4 pulses 1 2 240 1 tF 1 tF 1 2 FRAME D0 D3 CP Fig 5 403 Fig 5 404 Inverter for backlight Contrast adjustment circuit LCD display 640 x 240 dots LCD controller Analog input LED drive...

Page 105: ...or is turned ON when the LDON 0 signal becomes L level Also when IC pin changes to L the current flows from 5VL via the transistor to the LED COPY to turn ON the LED COPY Current Conditions to turn ON the LED 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 Fig 5 405 ...

Page 106: ...ve the stopper or move it to the position a Fig 5 503 Fig 5 504 B Control panel unit 1 Take off the right upper cover and the front upper cover Chapter 2 5 1 J I 2 Disconnect 1 connector 3 Remove 3 screws and take off 3 harness clamps Fig 5 501 a b A Stopper 1 Slide the stopper and pull it out Fig 5 502 Stopper 4 Lower the control panel and remove 6 screws 5 Take off the control panel unit while s...

Page 107: ...NTROL PANEL 5 9 Remove 4 screws and take off the LCD Fig 5 507 8 Disconnect 5 connectors and 1 harness clamp take off the DSP board Fig 5 506 7 Remove 5 screws and take off the hinge bracket Fig 5 505 6 Remove 3 screws and take off the cover Fig 5 508 ...

Page 108: ...e STUDIO350 450 CONTROL PANEL 5 14 November 2003 TOSHIBA TEC 5 10 Remove 16 screws and take off the KEY board Fig 5 509 ...

Page 109: ...ersion is performed converting the optical image data into an electrical analog signal This analog signal is changed to a digital signal 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 Fig 6 101 Rail for carriage 2 Reflector Exposure lamp Origina...

Page 110: ...cts the light reflected from the original to the mirror 2 described later Fig 6 202 Fig 6 201 The following shows the construction and purpose of the scanning system 1 Original glass This is a glass on which original is placed The light from the exposure lamp is irradiated to the original through this glass 2 Carriage 1 Carriage 1 consists of the exposure lamp lamp inverters reflector mirror 1 etc...

Page 111: ... of the carriage 1 4 Lens unit The light reflected from the mirror 3 is led to the CCD placed at the focal point of the lens which is fixed in a position 5 CCD driving board CCD board This is a board to convert the optical image signal which has been converted by the CCD into an analog signal 6 Automatic original detection sensor The size of an original placed on the glass is instantly detected us...

Page 112: ...heir respective home position The home position is de tected when the carriage 1 passes the home position sensor When the START button is pressed the both carriages start to move and scan the original on the glass b Scanning of an original placed on the RADF The carriage 1 stays at the shading position during shading correction and at the scanning position during scanning operation Fig 6 301 Wire ...

Page 113: ...1 IC16 SLG board GND B 24V B A 24V A 24V DG EN CWB RESET VREF M3 M2 M1 CLK GND MOTEN MOTDIR MOTRST MOTREF MOTMD3 MOTMD2 MOTMD1 MOTCLK Voltage to set value for motor current Clock input Cut off output Reset Excitation mode setting 3 Excitation mode setting 2 Excitation mode setting 1 Rotation direction setting RESET IC Scanner CPU GND 24V 5V 5V M Scan motor Fig 6 302 ...

Page 114: ... OFF H Normal operation Excited L Excitation drive is forcibly shut OFF Not excited Motor wire current value is set in the range of 0 to 1 7 A phase by applying the analog voltage 0 to 5 V Set the excitation mode Note Do not change the setting within 5µs after the first pulse of the MOTCLK becomes ON and the last pulse becomes OFF Reset for the whole system Internal circuit of the driver is initia...

Page 115: ...ON Carriage home position sensor ON Scan motor rotating Moves to the forward direction of carriage Scan motor rotating Moves to backward direction of carriage Carriage home position sensor OFF Carriage home position sensor ON Carriage home position data set Deceleration Stop Moving peak detection position Peak detection Completion of initialization Moving to carriage waiting position Scanning comm...

Page 116: ...mount is controlled in two ways a White reference formation reads the reflected light amount from the white shading correction plate b Black reference formation reads the light amount at the regulation position with the exposure lamp lights OFF 3 Image processing circuit A series of image processes such as a gamma correction and a shading correction are applied on the output signal from the CCD Th...

Page 117: ...ior 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 PET film Aluminum tape electrode Adhesive agent PET film...

Page 118: ...4 IC9 5VSW 5V 5V Q4 D3 Q6 24V LOW HIGH LMPON 5VSWON WDTOUT Scanner CPU INV EXPO 360 Xenon lamp 6 4 3 Control circuit for the exposure lamp SLG board Working conditions Exposure lamp ON signal 5V SW ON signal Watchdog timer signal Lamp turns ON at L Controls 5VSW by CPU Normally L L is output when CPU is out of control OFF Fig 6 404 ...

Page 119: ...ven number and odd number elements are separated and output in parallel via two channels 6 5 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 shortest at the center of the CCD and the longest at ends This ...

Page 120: ... that the presence of the original is detected by the presence of reflection Fig 6 601 Fig 6 602 Original size detection circuit APS 3 APS 1 APS 2 APS C APS R Original Original glass A4 Series APS 3 APS 2 APS C APS R LT Series Original glass Original VDD GND PWA SLG APS C APS 3 APS 2 APS R CPU Reflection type photosensor LT Series A4 Series VDD GND PWA SLG APS C APS 3 APS 2 APS 1 APS R CPU 6 6 2 P...

Page 121: ...r 2003 TOSHIBA TEC 6 13 e STUDIO350 450 SCANNER 6 A4 Series LT Series Fig 6 603 Sensor detection points ST LT LG LD ST R LT R APS R APS C APS 3 APS 2 A5 B5 A4 B4 A3 A5 R A4 R B5 R APS R APS C APS 3 APS 1 APS 2 ...

Page 122: ...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 corresponding to the change of the original size When the platen sensor is ON The latest original size or no original state recognized right before the...

Page 123: ... to detect an original 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 130µsec LED 8µsec Original Phototransistor About reflection type photosensor Fig 6 604 ...

Page 124: ...riginal detection sensor APS sensor C 1 A4 series 1 Take off the lens cover Chapter 6 7 B 2 Disconnect 1 connector from the SLG board 3 Release the harnesses from 6 harness clamps 4 Remove 1 screw each and take off the APS sensors 5 pcs 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...

Page 125: ...harness from 1 harness clamp and pull out the harness from the frame of the carriage Note When disconnecting the connector make sure not to overload the carriage frame 6 Move the carriage 1 to the position where the exposure lamp is seen through the cutout of the frame C 2 LT series 1 Take off the lens cover Chapter 6 7 B 2 Disconnect 1 connector from the SLG board 3 Release the harnesses from6 ha...

Page 126: ... 4 Handle the unit with extra care Do not touch the adjusted area or lens Hold the unit as shown in the figure at right E Lens unit 1 Take off the lens cover Chapter 6 7 B 2 Disconnect 1 connector from the SLG board 3 Remove 2 screws and take off the lens unit 7 Remove 1 screw Lift up the exposure lamp and take it off by pulling out toward you Note Make sure to hold only the black molded part of t...

Page 127: ...point G Carriage 1 1 Take off the original glass Chapter 6 7 A 2 Take off the upper rear cover and front upper cover Chapter 2 5 1 G E 3 Move the carriage 1 to the position shown in the figure at right and match the positions of each hole and screw 4 Remove 2 screws Then pull down each bracket fixing the wire from the hole of the frame on both ends of carriage 1 5 Disconnect 1 connector from the S...

Page 128: ...hen move it to the direction B slowly push it to the end of frame and fix at this position with the screws Refer to 3 7 1 in the Service Handbook I INV board 1 Take off the carriage 1 Chapter 6 7 G 2 Disconnect 2 connectors 3 Remove 2 screws and take off the INV board H Mirror 1 1 Take off the carriage 1 Chapter 6 7 G Note When replacing the mirror 1 replace the carriage 1 together with mirror 1 M...

Page 129: ...e wire holder jig 3 Remove the tension springs on both front and rear sides 4 Remove the carriage wires on both front and rear sides 5 Rotate the carriage 2 in the direction where the inside of the frame is dented shown in the figure at right not to touch the mirror Then take off the carriage 2 Fig 6 719 Fig 6 720 Fig 6 721 Tension spring K Mirrors 2 and 3 1 Take off the carriage 2 Chapter 6 7 J N...

Page 130: ...side 3 Release the latches of the sensor from the frame and take off the platen sensor 4 Disconnect 1 connector from the carriage home position sensor on the left rear position of the equipment upper side 5 Release the latches of the sensor from the frame and take off the carriage home position sensor M SLG board 1 Take off the lens cover Chapter 6 7 B 2 Disconnect 8 connectors from the SLG board ...

Page 131: ...n the photoconductive drum surface The followings are the boards used for image processing Fig 7 101 SLG board PWA F SLG 360 LGC board PWA F LGC 360 Board Function Smoothing processing external input system interface image area control laser related control and printer high quality image processing Image processing writing control section LGC System section SYS Image processing scanning control se...

Page 132: ...nts and the light source is performed and the digital signal is output as an image signal from the scanning section 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 SLG board PWA F SLG 360 and LGC board PWA F LGC 360 in this equipment ...

Page 133: ...nner high quality image processing External output system interface SLG board PWA F SLG 360 SYS board PWA F SYS 360 CCD board PWA F CCD 360 Smoothing processing External input system interface Image area control Laser related control Printer high quality image processing LGC board PWA F LGC 360 Laser drive board PWA F LDR 360 Sorting group copy magazine sorting 2in1 4in1 single sided double sided ...

Page 134: ... processing section on the SLG board is controlled by the CPU on the SLG board 2 The image processing section on the SLG board realizes the following when functioning the equipment High quality image processing Image memory editing Editing processing Gamma correction Gradation processing External output system interface ...

Page 135: ...ackground adjustment function while manually adjusting the image density undesirable background of the original can be removed if any and some necessary but disappeared background can be recovered By using this function it is possible to cut the background density down to zero when copying originals which have a certain level of background density such as newspapers Example Smaller No of pixels La...

Page 136: ...x is 3 x 1 The above averaging operation is performed for all the pixels to accomplish the high reproduc ibility of original The following is the case that the low pass filtering is applied on the primary scanning pixel High pass filter processing Character outline blurs when the original such as text with big difference in density among the pixels is optically scanned and output from the CCD Char...

Page 137: ...e processing operation Example Enlargement Example Reduction b Mirror imaging This is accomplished by reading and outputting data from its end 3 Editing processing This function performs trimming and masking a Trimming Using rectangular area signals the image signals inside the rectangular area are left and the other image signals are eliminated b Masking Using rectangular area signals the image d...

Page 138: ...dation 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 gradation reproducibility such as for photographic images 6 External output system interface This function controls the output of the output interface 7 Scanner high quality...

Page 139: ...circuit The image processing section mounted on the LGC board realizes the followings 1 Smoothing processing This function removes jagginess and smoothes character outline of images input from the external input system interface and output them 2 External input system interface This function controls the input of the input interface 3 Image area control This function sets the effective image area ...

Page 140: ... driving PC board The 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 H Sync Reference clock signal in the printer section clock generation section synchronized with H Sync and its signal 3 Laser drive section ON OFF control of the semiconductive laser and APC Auto Power Control ...

Page 141: ...mitted from the scanner printer controller etc to create the latent image Image signal is converted into the light emission signal of the laser diode on the laser drive PC board then radiated on the drum through the optical elements such as cylinder lens polygonal mirror and fθ lenses The unit must not be disassembled in the field as they are very sensitive to dust and finely ad justed at the fact...

Page 142: ... Laser drive PC board Laser diode Laser emission unit Finite focus lens Aperture Cylinder lens Polygonal mirror Paper exit Polygonal motor Polygonal motor drive PC board Rear H Sync signal detection PC board Slit glass for outgoing laser beam H Sync returning mirror f lens 2 f lens 1 ...

Page 143: ...ntrol ON OFF signal from the laser driving PC board Laser beam which passed through the finite focus lens is focused on the drum surface b CAUTION The beam of the semiconductor laser is very weak about 5 mW but focused parallel rays creates great energy which is hazardous Some material of the components of the laser optical unit are metal Since the unit is in a sealed container there is no danger ...

Page 144: ...follows During ready 10 000 00 rpm During printing 38 090 55 rpm 600dpi 38 951 37 rpm FAX 15 4 16 0 dot mm 37 490 70 rpm FAX 16 0 15 4 dot mm b Polygonal mirror One laser beam emitted from the laser di ode is reflected by this mirror As the po lygonal mirror is rotated by the polygonal motor the reflected laser beam moves in sync with the rotation The direction of the movement is the primary scann...

Page 145: ...ches equal on the drum surface b Face tilt correction The reflecting face of the polygonal mirror is tilted slightly to one side against the per fect vertical Horizontal deviation of the laser beam which is caused by the tilt is corrected c Sectional shape of laser beam The shape of the laser beam spotted on the drum is adjusted 4 H Sync signal detection PC board The laser beam which is started to...

Page 146: ...ard This control board has the following functions a APC control function adjusts disparity of the laser intensity caused by temperature b Laser ON OFF function 6 Slit glass Slit glass is located where the laser beam is output from the laser optical unit and it protects the unit from dust ...

Page 147: ...pprox 785 nm This semiconductive laser outputs 5mW with standard DC power supply Laser intensity is controlled by using the output from the PIN diode for moni toring light output in the semiconductive laser Fig 8 302 Fig 8 301 Threshold current Forward current Monitor current Current mA Optical Output mW Low temp High temp Regulation The relation between the current and optical output of the semic...

Page 148: ...e circuit of the polygonal motor 2 Control signal The polygonal motor is a DC motor which is PLL controlled by clock signals The signals from LGC board control the polygonal motor Signal POMON POMCK POMP Fig 8 501 Remarks Polygonal motor ON signal Polygonal motor reference clock signal Polygonal motor PLL signal Level L ON Normal rotation Level H OFF Abnormal rotation LGC board POL board P93 T03 P...

Page 149: ...3 Disconnect the connector with lock CN206 and connector CN207 on the LRL PC board 4 Disconnect the joint connector between the laser unit fan and polygonal motor 5 Remove 1 screw on the front side and loosen 1 screw on the rear side Fig 8 602 6 Stand the laser optical unit against the rear side of the equipment by moving the relay stay to the rear side Be careful not to fold the cable on the rela...

Page 150: ...d since it is very sensitive to the dust and stain 4 When installing fix the laser optical unit with the screws securely by matching the bosses on the bottom of the unit with the holes of the frame Fig 8 604 Fig 8 605 C LRL PC board 1 Take off the receiving tray Chapter 2 5 1 H 2 Disconnect 2 connectors with lock CN204 and CN206 and 2 connectors CN205 and CN207 3 Remove 1 screw Take off the LRL PC...

Page 151: ... No 1 2 3 4 5 6 7 8 9 10 11 12 Name Upper drawer separation roller Upper drawer feed roller Upper drawer pickup roller Lower drawer separation roller Lower drawer feed roller Lower drawer pickup roller Registration sensor Registration roller rubber Registration roller metal Transport roller Bypass pickup roller Bypass feed roller Name Bypass transport roller Upper drawer feed sensor Lower drawer f...

Page 152: ...Low speed Transport clutch High speed Upper drawer feed clutch Lower drawer feed clutch Paper feeding section drive system Rear side Fig 9 102 No 25 26 27 28 29 20 25 25 21 38 31 40 34 35 28 35 28 23 24 30 27 18 33 33 28 21 34 35 28 25 26 29 27 28 Bypass unit Lower drawer Upper drawer Feeding system drive gear ...

Page 153: ... roller 5 Registration roller Paper transported from the feed roller is pushed against the registration rollers which aligns the leading edge of paper The registration roller then rotates to transport the paper to the transfer section The following sensors detect the presence absence of paper and the position of the paper being trans ported to control the ON OFF of the corresponding rollers 6 Bypa...

Page 154: ...eets the actuator blocks the light path of the sensor to notify that the paper quantity is getting less 10 Feed sensor This sensor detects whether the leading trailing edge of paper has passed the feed roller or not It also detects jams such as paper misfeeding 11 Registration sensor This sensor detects whether the leading edge of the paper has reached the registration roller or not and the traili...

Page 155: ...y the bypass pickup solenoid is turned OFF and the pickup roller returns by the spring force The separation roller works not to transport paper more than one sheet at a time 9 2 2 Operation of drawer pickup roller Fig 9 202 When the drawer is inserted the pickup roller and roller holder fall by the spring force Then the drawer tray lifts up and paper feeding is enabled When the drawer feed clutch ...

Page 156: ...pper sheet is transported in the direction of black arrow since the frictional force between two sheets is small Example When only one sheet enters into the separation roller section Since the transporting force of the feed roller is greater than the braking force of the separation roller these two rollers rotate together to transport the sheet to the registration roller When two sheets enter into...

Page 157: ...either of the feed sensors is ON there is paper on the transport path at power ON it is deter mined that a paper jam has occurred and no operation is enabled until the jammed paper is re moved B Ready status 1 After the tray is moved up to check the presence absence of paper as described above the equip ment enters the ready state During the ready mode the tray stays at the raised position 2 When ...

Page 158: ...ed by the registration rollers The feed clutch and transport clutch high speed are turned ON and the pickup roller feed roller and transport roller stop rotating The registration clutch and transport clutch low speed are turned ON and the paper is trans ported to the transfer unit D 2 Upper drawer The feed clutch is turned ON and the pickup roller and feed roller rotate to start paper feeding The ...

Page 159: ...is shown below IN1 and IN2 are input terminals to receive the signals from the tray up motor The control logic based on the signals from the tray up motor controls ON OFF of the rotation direction IN1 H L H L IN2 H H L L M L L H OFF high impedance M L H L State Brake CCW CW Stop Input Output Fig 9 301 1 2 3 4 5 6 7 IN1 IN2 M GND M N C VCC Thermal shutdown over current protection circuit Control lo...

Page 160: ...wer 2 Remove 2 screws and take off the right front hinge cover 3 Remove 2 screws and take off the right rear hinge cover 4 Remove 2 screws and take off the right lower cover 5 Remove 1 screw and take off the 2 ground wires 6 Disconnect 1 connector and release the harness from harness clamp Right front hinge cover Screw Screw Right rear hinge cover Screw Right lower cover Screw Ground wire Connecto...

Page 161: ...ull it out to the front A 2 Hinge assembly 1 Take off the bypass unit Chapter 9 4 A 1 2 Disconnect 1 connector and release the har ness from harness clamp 3 Remove 2 screws and slide the hinge assem bly to take it off with the tray Standing the tray makes easier to be removed Fig 9 405 Fig 9 406 Fig 9 407 Fig 9 408 Side cover Screw Screw Bypass unit Screw ...

Page 162: ...3 hooks and take off bypass tray upper cover 4 Remove 1 screw and take off the plate spring 5 Remove 1 screw on the tray side and take off the bracket Note Install the bracket so that its pointer is placed at the same position as before Fig 9 409 Fig 9 411 Hinge assembly Screw Bracket Plate spring 4 Pull out the hinge assembly from the bypass tray Fig 9 410 Screw Bypass tray upper cover Fig 9 412 ...

Page 163: ...ve 1 screw and slide the bypass feed upper cover to take it off 3 Remove 4 screws and take off the upper plate 4 Disconnect 1 connector remove 1 spring and take off the bypass pickup solenoid with the solenoid arm Screw SFB board Screw Bypass feed upper cover Screw Bypass pickup solenoid Spring Solenoid arm Upper plate 6 Disconnect 1 connector remove 1 screw and take off the SFB board ...

Page 164: ...ss unit Chapter 9 4 A 1 2 Take off the bypass feed upper cover Chapter 9 4 A 4 3 Take off the upper plate Chapter 9 4 A 4 4 Take off the spring and sensor arm A 6 Bypass pickup roller 1 Take off the bypass unit Chapter 9 4 A 1 2 Remove 1 screw and take off the bypass feed upper cover 3 Remove 4 screws and take off the bypass drive unit Spring 5 Disconnect the connector from the sensor and release ...

Page 165: ...oller 1 Set the timing belt to the pulley securely 2 Do not put the wrong position when set ting the timing belt 3 Be sure to insert the clip into the groove of shaft 4 Check that there is no stain such as 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 9 423 E ring Bushing Bypass transport rolle...

Page 166: ...wing for assem bling A 9 Bypass feed clutch 1 Take off the bypass unit Chapter 9 4 A 1 2 Take off the bypass tray and hinge assembly Chapter 9 4 A 2 3 Disconnect 1 connector and release the har ness from harness clamp 4 Remove the harness clamp Fig 9 424 Screw Lower plate A 10 Bypass separation roller 1 Take off the bypass unit Chapter 9 4 A 1 2 Remove 3 screws and take off the lower plate Fig 9 4...

Page 167: ...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 9 431 Fig 9 430 Sensor plate Screw Sensor Spring Sensor arm Bypass feed sensor 4 Detach the cover the arbor and the clutch spring from the shaft and then take off the bypass separation roller Fig 9 429 Bypass separation roller assembly 3 Take off the bypass separation rol...

Page 168: ...6 Take off the cleaner unit Chapter 11 6 A 7 Open the jam access cover 8 Release the latch and take off the transfer separation charger Note Be sure that the spring is inserted in 2 termi nals when assembling Fig 9 435 Fig 9 434 9 Disconnect 3 connectors Note Hook the harness on the hook securely when inserting the connector of the transfer sepa ration charger 10 Disconnect the connector on the fr...

Page 169: ... Remove 2 screws and take off the right trans port guide Note When taking off the right transport guide be careful not to come off the bypass transport guide and the spring together with it 14 Release the latch and take off the lower drawer feed sensor Jam access cover Harness Connector Bypass transport guide Spring Screw Screw Right transport guide Right transport guide Lower drawer feed sensor ...

Page 170: ...ke off the IH terminal cover Chapter 2 5 1 F 6 Take off the right rear cover Chapter 2 5 1 G 7 Remove 1 screw and take off the front cover stay 8 Release the latch from the shaft and take off 9 Remove 1 screw and take off the terminal cover 10 Remove 1 screw and disconnect the red lead wire from the terminal cover Note Make sure that the harness is inserted into the dent of the terminal cover when...

Page 171: ...amage the roller supporting section when installing or taking off the registration front guide 14 Remove 1 screw and take off the registration sensor with bracket 15 Disconnect the connector release the latch to take off the registration sensor 16 Disconnect the connector take off the upper drawer feed sensor Screw Screw Registration front guide Roller supporting section Registration sensor Connec...

Page 172: ...nit Chapter 11 6 A 5 Take off the rear cover Chapter 2 5 1 H 6 Take off the right rear cover Chapter 2 5 1 G 8 Loosen 5 screws disconnect 2 connectors and slide the SYS board lower cover to take it off Note Do not vibrate the cover because HDD is attached on it 9 Release the lock support on the upper side of SYS board case and disconnect 4 connec tors 7 Loosen 9 screws of the SYS board case and sl...

Page 173: ...f the clutch with the position shown in the drawing for assem bling 14 Disconnect 1 connector of the fan motor 15 Remove 1 screw and take off the developer unit cooling fan 1 unit 16 Disconnect 3 connectors of the drive gear unit SYS board case Connector Registration clutch Setscrew Screw Connector Connector Connector Developer unit cooling fan 1 unit 10 Remove 5 screws and take off the SYS board ...

Page 174: ... of the reg istration roller 1 pc each 20 Remove the E ring and the bushing on the front side and slide the registration roller rubber to the rear side to take it off 21 Take off the registration roller metal front side 1 E ring 1 bushing and 1 spring rear side 1 E ring 1 bushing and 1 spring Connector Drive gear unit Screw Screw Registration roller metal Spring Spring E ring E ring Bushing Bushin...

Page 175: ...Remove 4 screws and take off the noise filter assembly 6 Disconnect 1 connector of the tray drive unit and release the harness from the harness clamp 7 Remove 4 screws and take off the tray drive unit with the plate 8 Remove 4 screws and detach the tray drive unit from the plate 9 Place the unit with its coupling up and release 6 latches to take off the cover Note Be careful in taking off the cove...

Page 176: ...port clutch upper lower 1 Take off the rear cover Chapter 2 5 1 H 2 Take off the tray drive unit with its plate Chapter 9 4 E 3 Remove 3 screws 1 E ring and take off the clutch bracket Note Do not apply pressure the transport clutch in all directions when installing the clutch bracket After installing it open the side cover and check that the transport roller rotates smoothly Tray up motor E ring ...

Page 177: ...m Lower side Shaft diameter 6 mm 2 Attach the clutches to the shafts as shown on the right 0 0 5mm G Drawer detection switch upper lower 1 Remove the upper and lower drawers 2 Take off the rear cover Chapter 2 5 1 H 3 Take off the noise filter assembly 4 screws 4 Take off the tray drive unit with its plate Chapter 9 4 E 5 Disconnect the connector release the latch and take off the drawer detection...

Page 178: ...ake off the drawer feeding unit Chapter 10 4 H 1 2 Remove 1 screw and take off the separation roller holder Fig 9 470 H Drawer feeding unit upper lower H 1 Drawer feeding unit 1 Take off the upper and lower drawers 2 Remove 1 screw and take off the drawer feed ing unit by sliding it to the front side H 4 Paper stock sensor 1 Take off the drawer feeding unit Chapter 10 4 H 1 2 Pull up the paper sto...

Page 179: ...e off the drawer feeding unit Chapter 10 4 H 1 2 Remove the pickup roller assembly from the pickup arms and take off the belt Fig 9 474 3 Detach the lever from the holder and take off the separation roller with the shaft 4 Detach the cover the arbor the clutch spring and the washer from the shaft and then take off the separation roller Fig 9 477 Lever Separation roller Arbor Cover Clutch spring Se...

Page 180: ...it Chapter 10 4 H 1 2 Disconnect the connector and release the har ness from harness clamp 3 Remove 3 E rings pulley one way clutch and take off the pickup roller Notes Match the protruding portion of clutch with the position shown in the drawing for assembling 4 Loosen 1 setscrew and take off the drawer feed clutch E ring One way clutch Pickup roller Pulley E ring Connector Bush Clutch bracket Dr...

Page 181: ...November 2003 TOSHIBA TEC 9 31 e STUDIO350 450 PAPER FEEDING SYSTEM 9 Fig 9 482 Notes Attach the clutch to the shaft referring to the figure at right 0 2 0 5mm ...

Page 182: ...e STUDIO350 450 PAPER FEEDING SYSTEM 9 32 November 2003 TOSHIBA TEC 9 ...

Page 183: ...the developer unit gears C Fuser unit drive Drives the fuser unit by transmitting the rotation of the main motor through the gears to the fuser unit gears D Cleaner unit drive Drives the cleaner unit gear by the rotation of the drum flange gear E Registration roller drive Drives the registration rollers by transmitting the rotation of the main motor through the gears and clutches F Transport rolle...

Page 184: ...tated 3 Hall elements A B and C detect the rotation position of the motor rotor 4 The excitation phase switching section switches the excitation of each phase The motor keeps rotating by repeating from 2 to 4 5 An FG pulse is generated by the FG pattern of the encoder attached to the main motor 6 The FG pulse and the reference frequency from the LGC board are compared in terms of the phase and spe...

Page 185: ...gnal MTR LGC Output When the difference of the FG pulse cycle against the reference frequency is within 6 25 it is specified that the motor is in a lock range normal rotation and this MAMPL signal becomes L level At this time the LED D4 is lit 3 MAMCK signal LGC MTR Input This is a reference clock signal to rotate the main motor at a fixed speed 4 MAMBK signal LGC MTR Input This is a signal to sto...

Page 186: ...the rear cover Chapter 2 5 1 H 2 Take off the SYS board case Chapter 9 4 D 3 Take off the developer cooling fan 2 Chapter 11 6 I 4 Disconnect 1 connector loosen 1 setscrew and take off the registration clutch C Gear unit 1 Take off the rear cover Chapter 2 5 1 H 2 Take off the SYS board case Chapter 9 4 D 3 Take off the developer unit cooling fans 1 2 Chapter 11 6 I 4 Take of the registration clut...

Page 187: ...Fig 10 406 Screw Screw Gear unit Fig 10 407 D Developer drive clutch 1 Take off the gear unit Chapter 10 4 C 2 Remove 2 screws and take off the bracket 3 Remove the bushing and take off the devel oper drive clutch Note Match the protruding portion of clutch with the position shown in the drawing for as sembling Bracket Screw Bushing Developer drive clutch ...

Page 188: ...e STUDIO350 450 DRIVE SYSTEM 10 6 November 2003 TOSHIBA TEC 10 ...

Page 189: ...uger Toner bag full detection sensor 1 Toner bag detection sensor 2 Transfer Separation charger Transfer guide Transfer charger Separation charger Sub separation fan Exhaust fan Discharge LED Toner bag Developer unit cooling fan 1 Developer unit cooling fan 2 Middle fan Drum thermistor in developer unit High voltage transformer Temperature humidity sensor Fig 11 101 Discharge LED Middle cooling fa...

Page 190: ...air around it is charged ionized The ionized air then flows into the drum causing it to be charged This phenomenon is called corona discharge Negative charge caused by the corona discharge and grid is applied to the drum surface evenly in dark place The main charger is equipped with a wire cleaner to clean the wire 3 Cleaner a Cleaning blade This blade is pressed against the drum surface with a co...

Page 191: ...as reached to the full detection position in the toner bag Toner bag full is determined when either of the toner bag full detection sensors 1 and 2 detects full of toner Printing is interrupted upon the detection of Toner bag full status however the paper already fed is subject to be printed and exited Detecting with the toner bag full detection sensor 1 may cause the overload of the drum cleaning...

Page 192: ... air from the back of the equipment The middle fan discharges the air around the devel oper unit 10 Drum thermistor The electrical charge amount of drum surface varies depending on the drum surface temperature Therefore this thermistor detects the drum surface temperature to control to maintain the charge amount at a certain level Additionally the exhaust fan and developer unit cooling fans 1 and ...

Page 193: ...verts to the analog data by the D A converter Outputs the control voltage Vc to the main transfer and separation chargers developer bias and trans fer guide bias transformer The main transfer and separation chargers developer bias and transfer guide bias transformer gener ate output current or voltage which is proportional to the control voltage Vc Adjustment of the control voltage Vc change of ad...

Page 194: ...ELATED SECTON 11 6 November 2003 TOSHIBA TEC 11 CN306 B12 HVSAV CN306 B9 HVTVR CN306 B7 HVDVR CN306 B5 HVMVR ASIC GA IC38 IC2 Separation charger Transfer charger Developer bias Main charger D A conveter IC32 NVRAM Fig 11 302 ...

Page 195: ...arge on the drum surface varies greatly with the surface temperature of the drum This circuit detects the temperature of the drum surface and the amount of charge on the drum surface is controlled to be constant based on the result 2 Configuration of the drum temperature detection circuit Drum temperature detection circuit Fig 11 401 Drum thermistor 5V DRTMP 1 DRTH CPU GND GND ...

Page 196: ...Temperature Humidity Sensor 11 5 1 General description This sensor measures the temperature and humidity inside the equipment 11 5 2 Construction Temperature humidity control circuit is configured as follows Fig 11 501 R TH CPU PC7 AN7 PC3 AN3 HMS 1A TEMP 1A LGC board HUMI THS ...

Page 197: ...en 2 screws and take off the cleaner unit B Main charger B 1 Main charger 1 Take off the cleaner unit Chapter 11 6 A 2 Release the latch and pull out the main charger to the direction of the arrow Note Be careful not to touch or scratch the drum surface at this time B 2 Main charger grid 1 Push the terminal head at the front side and remove the grid Note Do not touch the mesh area of the grid B 3 ...

Page 198: ...e hands B 4 Charger wire cleaning pad 1 Release the charger wire cleaner shaft from the hooks of the charger wire cleaning pads 2 Remove the charger wire cleaning pads Note When installing make sure that 2 charger wire cleaning pads are away from the wire while the charger wire cleaner shaft is at the rear side C Drum 1 Pull out the cleaner unit and take off the main charger Chapter 11 6 A B 1 2 R...

Page 199: ...of cleaning blade is released with the jig 2 Insert the head of the jig to the space shown in the figure while pushing the blade holder 3 Be careful not to touch or scratch the edge of cleaning blade Fig 11 611 D Cleaner D 1 Cleaning blade 1 Take off the cleaner unit Then take off the main charger and drum Chapter 11 6 A B 1 C 2 Remove 2 screws and cleaning blade Note Be careful not to touch or sc...

Page 200: ...on charger E 1 Transfer Separation charger 1 Open the bypass tray ADU and jam access cover 2 Release the latches and take off the transfer and separation chargers Note When installing the transfer and separation chargers make sure not to deform the springs D 2 Recovery blade 1 Remove the cleaning blade Chapter 11 6 D 1 2 Remove the recovery blade Notes 1 When attaching the recovery blade clean the...

Page 201: ...eparation fan Note When installing pay attention to the direction of the wind from the fan E 2 Charger wire Length 363 mm tungsten wire diameter 0 06mm For both transfer and separation 1 Remove the separation supporter 2 Take off each terminal cover on both front and rear sides 3 Remove the terminals springs and wires Notes Be careful of the followings when installing the wire 1 Insert the wire se...

Page 202: ...sconnect 1 connector and remove 1 screw Then take off the toner bag full detection sen sor 1 with the whole bracket 3 Take off the discharge LED 4 Disconnect 1 connector and take off the toner bag full detection sensor 1 from the bracket G Discharge LED 1 Take off the developer unit and cleaner unit Chapters 12 5 A and 11 6 A 2 Disconnect 1 connector and remove 1 screw Then take off the discharge ...

Page 203: ...he rear cover Chapter 2 5 1 C 2 Take off the SYS board with the whole case Chapter 2 5 2 C 3 Disconnect 1 connector and release the har ness from 1 harness clamp 4 Remove 2 screws and take off the duct Fig 11 624 Fig 11 625 Fig 11 626 Fig 11 627 Developer unit cooling fan 2 5 Release the harness from 1 harness clamp 6 Remove 1 screw and take off the duct cover 7 Take off the developer unit cooling...

Page 204: ...oper unit cooling fan 1 1 Take off the rear cover Chapter 2 5 1 C 2 Take off the duct of developer unit cooling fan 2 Chapter 11 6 I 1 3 Release 2 latches and take off the duct cover I 3 Developer unit cooling fan unit 1 1 Take off the rear cover Chapter 2 5 1 C 2 Take off the SYS board with the whole case Chapter 2 5 2 C 3 Remove 1 screw and disconnect 1 connector and take off the developer unit ...

Page 205: ...Remove 1 screw and take off the toner bag holder 5 Remove 2 screw and take off the toner car tridge cover 6 Take off the rear cover SYS board case de veloper unit cooling fan 2 and developer unit cooling fan unit 1 Chapters 2 5 1 C 2 5 2 C and 11 6 I 7 Take off the registration clutch and gear unit Chapter 10 4 B C 8 Remove 3 screws on the rear side 9 Remove 3 screws on the front side and release ...

Page 206: ... screw and stand the developer unit guide aside Fig 11 634 12 Remove 2 screws and take off the middle fan duct Fig 11 635 13 Disconnect 1 connector and remove 2 screws and take off the middle fan Note When installing pay attention to the direction of the wind from the fan Fig 11 636 ...

Page 207: ...ity sensor 1 Open the front cover 2 Take off the receiving tray Chapter 2 5 1 H 3 Disconnect 1 connector and remove 1 screw Then take off the temperature humidity sen sor with the whole cover Fig 11 637 Fig 11 638 4 Remove 1 screw and take off the tempera ture humidity sensor from the cover ...

Page 208: ...e STUDIO350 450 DRUM RELATED SECTON 11 20 November 2003 TOSHIBA TEC 11 ...

Page 209: ...rol circuits Toner cartridge drive unit Toner cartridge detection switch Temperature humidity sensor chapter 11 Developer unit Developer material Mixers 1 and 2 Developer sleeve magnetic roller Doctor blade Auto toner sensor Drum thermistor chapter 11 Drum Doctor blade Mixer 2 Developer sleeve Mixer 1 Auto toner sensor Sectional view of developer unit Drum thermistor Fig 12 101 ...

Page 210: ...ge is formed on the drum surface by the static electricity caused by the friction c Developer sleeve Magnetic roller This is an aluminum roller with a magnet inside The magnet works to absorb the developer material and forms the magnetic brush The magnet is fixed and only the sleeve around is rotated This rotation makes the magnetic brush of the developer sleeve sweep over the drum surface and per...

Page 211: ...r TA8428 IC51 is connected with both ends of the motor wire When the PC6 TNRM1 1 of the ASIC GA becomes H and PC7 TNRM2 1 becomes L levels current flows into the motor wire and the motor is rotated When both of PC6 TNRM1 1 and PC7 TNRM2 1 of the ASIC GA become H level the motor is braked and stopped When both of PC6 TNRM1 1 and PC7 TNRM2 1 of ASIC GA become L level the motor waits for the next com...

Page 212: ...r Circuit 12 4 1 General description 1 Function of the auto toner circuit Detects the toner density in the developer material and supplies toner when the density is lowered to a certain level Detects that there is no toner left in the cartridge toner empty detection 2 The auto toner circuit consists of the following Auto toner sensor Detects the toner density Control section Controls the toner den...

Page 213: ...e toner density to a certain ratio as follows Toner is consumed The toner density is lowered Change in the auto toner sensor output responding to humidity is detected The toner motor is driven Toner is supplied from the toner cartridge to the developer unit c Toner empty detection and recovery Detects that there is no toner in the toner cartridge The toner motor is driven The auto toner sensor out...

Page 214: ... Receives the change in the magnetic resistance of the developer material through the magnetic circuit secondary side DC conversion circuit Converts a high frequency output from the detection winding into a DC signal auto toner output VATS When the toner density is low The ratio of the toner against the carrier in the developer material decreases The magnetic resistance decreases The detection out...

Page 215: ...to maintain the toner density in the developer material at a certain amount 12 4 4 Adjustment using the drum thermistor Variation in the output VATS of the auto toner sensor due to temperature is corrected using the drum thermistor to maintain the toner density in the developer material at a certain amount Feedback control by drum thermistor in setting mode 08 Item to be controlled Toner output co...

Page 216: ...front cover and remove the toner bag 2 Disconnect 1 connector and loosen 1 screw 3 Take out the developer unit Note Do not touch the developer sleeve on the top of the developer unit B Developer material B 1 Discharge of developer material 1 Slide the upper cover of developer unit to the direction of the arrow and take off the cover by releasing the latches Developer sleeve ...

Page 217: ...of the devel oper unit to the direction of the arrow while filling the developer unit with the developer material Spread out the developer material over the developer sleeve Note When installing the upper cover of developer unit attach the latches securely C Guide roller C 1 Front side 1 Discharge the developer material Chapter 12 5 B 1 2 Make a note of the position where the polarity adjustment l...

Page 218: ...the polarity ad justment lever 6 Remove 1 E ring and take off the guide roller Note When reassembling match the polarity adjustment lever with the previously marked position on the scale C 2 Rear side 1 Remove 2 screws and take off the bracket 2 Remove 1 E ring and 4 gears 3 Take off the guide roller Fig 12 509 Fig 12 510 Fig 12 511 Fig 12 512 Guide roller Polarity adjustment lever Guide roller ...

Page 219: ...er 12 5 B 1 2 Disconnect 1 connector on the bottom of the developer unit 3 Remove 1 screw and take off the auto toner sensor E Drum thermistor 1 Discharge the developer material Chapter 12 5 B 1 2 Take off the front cover of developer unit Chapter 12 5 C 1 3 Remove 2 screws and take off the developer sleeve cover 4 Remove 1 screw and take off the drum ther mistor ...

Page 220: ...e guide rollers on both front and rear sides Chapter 12 5 C 3 Take off the developer sleeve cover Chapter 12 5 E 4 Remove 2 screws Lift up the shaft and take off the developer sleeve unit 5 Remove 4 screws and doctor blade 6 Take off the developer sleeve 7 Replace the oil seal on the shaft on the de veloper sleeve rear side if necessary Replacement of Oil Seal Page 12 15 Developer sleeve Oil seal ...

Page 221: ...Fig 12 523 G Mixer 1 1 Discharge the developer material Chapter 12 5 B 1 2 Take off the developer sleeve unit Chapter 12 5 F 3 Take off the bushing on the front side Replacement of Oil Seal Page 12 15 4 Remove 1 E ring and 1 bushing Then take off the mixer 1 H Mixer 2 1 Discharge the developer material Chapter 12 5 B 1 2 Take off the developer sleeve unit Chapter 12 5 F 3 Remove 1 E ring and 1 bus...

Page 222: ...ge drive unit 1 Take off the toner cartridge 2 Take off the developer unit Chapter 12 5 A 3 Take off the receiving tray Chapter 2 5 1 H 4 Take off the tray back cover Chapter 2 5 1 I Fig 12 525 7 Remove 2 screws and disconnect 2 connec tors Then take off the toner cartridge drive unit Fig 12 526 5 Disconnect 1 connector and remove 1 har ness clamp 6 Remove 3 screws and take off the toner car tridg...

Page 223: ... and take off the toner car tridge detection switch with the whole bracket 3 Remove 3 screws with a fine screwdriver and take off the toner cartridge detection switch and switch cover Replacement of Oil Seal 1 Insert a fine screwdriver into the depression of the oil seal to take it out 2 Push in a new oil seal parallel to the frame or bushing shown figure at right 3 Apply the grease Alvania No 2 a...

Page 224: ...e STUDIO350 450 DEVELOPMENT SYSTEM 12 16 November 2003 TOSHIBA TEC 12 ...

Page 225: ...er side and is rotated by the main motor drive Then the paper transported to the fuser unit is hold between the fuser roller and pressure roller and the toner is fused on the paper with heat and pressure After this the separation fingers separate the paper from the fuser roller or pressure roller Then the paper is transported to the receiving tray paper exiting options or ADU through the exit roll...

Page 226: ...ation fingers are installed five above the pressure roller and six above the fuser roller in order to separate the paper adhered on each roller 5 Cleaning roller The cleaning roller is a fluorinated metal roller which removes the residual toner and paper dust adhered on the pressure roller 6 Main thermistor This thermistor detects the temperature of the fuser roller to maintain it in a certain tem...

Page 227: ...ality it must be replaced as well as the other damaged parts in the fuser unit 9 Exit sensor This sensor detects the arrival of the leading or trailing edge of the paper at the exit roller of the fuser unit It also detects paper jams in the fuser unit paper exit area and trailing edge of paper turned over for duplex printing 10 Exit motor The exit motor is a stepping motor which drives the exit ro...

Page 228: ...imit circuit LGC IH 5V SW 5V SW Main thermistor Coil Fuser roller Coil output Fuse AC input Thermostat Noise filter Breaker Power code 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 Block diagram of fuser unit and IH control circuit ...

Page 229: ...thod the thermal effi ciency is higher than the lamp method because the fuser roller is directly heated B A Current flowing on the surface of the fuser roller Current flowing inside the fuser roller Eddy current High frequency magnetic field IH coil High frequency power source Image of current flowing from A to B D1 T1 C1 C2 CPU Voltage input I F circuit on LGC board Monitoring input current Curre...

Page 230: ...3 4 3 IH control circuit interface The IH control circuit uses a photocoupler as an insulation against the secondary circuit The interface signals are as follows Note IH status signal When the temperature due to insufficient cooling of the switching element IGBT is abnormal 10 Coil is abnormal IH FAN OFF After a certain period of time Error C480 When the upper limit of the power voltage is abnorma...

Page 231: ...from the RADF during warming up 2 AC power should be input voltage when the equipment is warming up The lower the voltage is the longer the warming up time becomes System configuration Equipment only Equipment and RADF 1 Equipment RADF 1 and FIN Equipment RADF 1 FIN and HPU Equipment RADF 1 FIN HPU and LCF Equipment RADF 1 FIN HPU LCF and FAX Warming up 2 1240 1200W 1220 1140W 1160 1080W Ready 700...

Page 232: ...ng 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 280 C the heater is automatically turned OFF regardless of the temperature of the area where the paper passes on 2 Control of th...

Page 233: ...Y SAVER 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 to turn OFF the IH coil Auto Shut Off Mode Setting Mode 08 206 When the printing is not performed in a specified period of time default setting 60 min e STU DIO350 90 min e STUD...

Page 234: ...status 9 08 400 Thermistors continue detecting the abnormal temperature even after the error codes and counter values are decided Even if the power is turned ON immediately it is automatically turned OFF again when the surface temperature of the fuser roller is still higher than the abnormal tem perature detected Wait until the surface temperature of the fuser roller is lowered enough and turn ON ...

Page 235: ...remely low and keeps turning the IH coil ON As a result the fuser roller 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 heat ing by IH circuit abnormality LGC circuit abnorm...

Page 236: ...mp or below 230 C or above 40 C or below 230 C or above 40 C or below 230 C or above Front edge thermistor 280 C or above 280 C or above 280 C or above 280 C or above 280 C or above 280 C or above 280 C or above 40 C or below Error code C440 C440 C410 C440 C440 C440 C440 C440 C450 C440 Checking timing Power ON Fixed time Fixed time Fixed time Fixed time On usual On usual On usual 7 Abnormality det...

Page 237: ...n 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 PA3 VDD IH board PA2 5V SW H1ERR2 H1ERR1 LGC board CPU Gate array Fig 13 407 ...

Page 238: ...ing up Detecting 40 C During ready status During ready status During printing At Energy Saving Mode H1ERR1 L L L H L L H L L H H Error code C470 C470 C480 C490 C470 C480 C490 C470 C480 C490 H1ERR2 L L H H L H H L H H L 2 IH error Port input value 2 IH error Initial abnormality CPU IH abnormality is not cleared IH power voltage abnormality The input voltage becomes above 20 approx or below 20 appro...

Page 239: ...d the direction of its rotation is switched by controlling the output timing of pulse signal A0 A1 B0 B1 G14 G16 G20 G18 Exit motor Exit roller ø15 PG10 PG12 PG11 PG13 CPU EXTMA EXTMB EXTMC Exit Motor EXTMD EXTMA 0 5V EXTMC 0 EXTMB 0 EXTMD 0 STK672 A AB B BB A0 B0 A1 B1 VREF PB1 PG1 Gate array PG2 5V SW LGC board Fig 13 501 13 6 Exit Motor Drive The diagram shown below is the layout of the driving...

Page 240: ...he harness from 1 harness clamp Fig 13 701 Fig 13 702 Fig 13 703 Fig 13 704 4 Close the fuser unit cover 5 Remove 2 screws and take off the fuser unit Notes 1 Make sure to hold the plastic part of the faston terminals when disconnecting them 2 Be careful not to connect each terminal to the wrong position B Fuser unit cooling fan 1 Take off the fuser unit Chapter 13 7 A 2 Take off the fuser unit co...

Page 241: ...and take off the fuser unit cooling fan C Exit sensor 1 Take off the fuser unit Chapter 13 7 A 2 Release 2 latches of the exit sensor cover and take off the exit sensor cover 3 Release 3 latches of the exit sensor and disconnect 1 connector while taking out the exit sensor D Exit finger 1 Take off the fuser unit Chapter 13 7 A 2 Open the fuser unit cover and transport guide 3 Pull out the shaft fr...

Page 242: ...rs for pressure roller F Separation finger for fuser roller 1 Take off the fuser unit Chapter 13 7 A 2 Open the fuser unit cover and transport guide 3 Remove 2 screws one on the front side is a stepped screw and take off the paper exit unit 4 Remove 6 springs and take off 6 separation fingers for fuser roller G Cleaning roller 1 Take off the fuser unit Chapter 13 7 A 2 Take off the fuser unit cove...

Page 243: ...3 19 e STUDIO350 450 FUSER UNIT PAPER EXIT SECTION 13 Fig 13 713 Fig 13 714 5 Remove 2 screws on the rear side 6 Remove 2 screws on the front side 7 Take off the transport guide 8 Take off the cleaning unit Fig 13 715 Fig 13 716 ...

Page 244: ...th left and right sides 4 Take out the pressure roller 9 Remove 1 C ring and take off the cleaning roller with the whole bushings on both sides 10 Take off the bushings from the cleaning roller Fig 13 720 I IH coil 1 Take off the fuser unit Chapter 13 7 A 2 Take off the fuser unit cover Chapter 13 7 B 3 Release the harness from the harness guide of the cover on the rear side 4 Remove 1 screw and t...

Page 245: ... off the paper exit unit Chapter 13 7 F 3 Take off the IH coil Chapter 13 7 I 4 Push down the pressure levers on both sides 5 Remove the E ring and gear A on the rear side After that remove C ring gear and bush ing in order Fig 13 721 5 Remove 1 screw and take off the coil holder on the rear side Fig 13 724 6 Remove 2 screws and take off the coil holder on the front side Pressure lever Gear A Bush...

Page 246: ...the protrusion inside the gear 3 Make sure not to scratch the fuser roller Lay the fuser roller on the clean place and prevent the fuser roller from dust 4 When the fuser roller has been replaced make sure to clean the separation fingers for the fuser roller Fig 13 727 K Thermistor 1 Take off the fuser roller Chapter 13 7 J 2 Release the harnesses from 4 harness clamps 3 Remove 1 screw for each th...

Page 247: ...ssure roller when adjusting the gap between the fuser roller and ther mostat with the screw A to be 1 5 mm to 1 9 mm M IH control PC board IH board M 1 IH board 1 Take off the IH terminal cover Chapters 2 5 1 L 2 Take off the right rear cover Chapter 2 5 1 P 3 Take off the SYS board with the whole case Chapter 2 5 2 C 4 Remove 3 screws and take off the IH board cover Screw A Fig 13 728 L Thermosta...

Page 248: ... right rear cover Chapter 2 5 1 P 3 Take off the SYS board with the whole case Chapter 2 5 2 C 4 Take off the IH board cover Chapter 13 7 M 1 5 Disconnect 3 connectors and remove 2 screws and then take off the IH board with the whole bracket Fig 13 732 5 Disconnect 2 connectors with lock and 4 con nectors 6 Remove 4 screws and take off the IH board Cautions 1 Tighten 2 screws A of the IH coil powe...

Page 249: ...er exit roller 5 Remove E rings and bushings on both sides metal bushing on front side and take off the upper exit roller Fig 13 736 O Exit motor 1 Take off the fuser unit Chapter 13 7 A 2 Take off the IH control PC board with the whole bracket Chapter 13 7 M 2 3 Remove 2 screws and disconnect 1 connec tor and take off the exit motor Fig 13 738 Metal bushing Spring Fig 13 735 3 Remove 1 connector ...

Page 250: ...e STUDIO350 450 FUSER UNIT PAPER EXIT SECTION 13 26 November 2003 TOSHIBA TEC 13 Fig 13 739 6 Take off the lower exit roller ...

Page 251: ...t 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 Paper guide Upper transport roller Entrance guide AD...

Page 252: ...plete duplex printing There are three methods of judging a paper jam 1 whether the ADU entrance sensor 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 is turned ON or not in a specified period of time after the ADU entrance sensor is turned ON E520 3 whether the registration switch is turned ON or not in a specified perio...

Page 253: ...LEXING UNIT 14 a Single paper circulation With the paper larger than A4 LT size duplex printing back side printing front side printing is performed for one sheet at a time as shown below Fig 14 201 1 2 3 4 5 6 7 8 9 2 2 2 4 4 4 4 1 2 2 1 1 2 1 2 1 2 1 4 3 2 1 3 ...

Page 254: ...2 2 2 4 4 4 4 2 2 1 2 1 4 3 3 1 b 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 14 202 ...

Page 255: ...se of 5 sheets Back side of the 1st sheet Back side of the 2nd sheet Front side of the 1st sheet Back side of the 3rd sheet Front side of the 2nd sheet Back side of the 4th sheet Front side of the 3rd sheet Back side of the 5th sheet Front side of the 4th sheet Front side of the 5th sheet 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2 2 4 2 2 4 4 4 6 6 8 8 10 10 10 10 10 2 4 6 2 2 1 8 6 5 9 8 7 3 1 4 4 3 8...

Page 256: ...h ADU entrance sensor ADU clutch ADU exit sensor ADU motor ADU Equipment 3190 6590 7425 7780 8665 10465 1825 2895 3675 4740 6005 7065 7325 8370 9170 10025 11485 12530 0 1845 2180 3695 4930 6025 6175 7340 7715 9185 10405 11500 885 1905 2730 3750 5065 6085 6380 7400 8230 9250 10550 11565 3845 4990 5690 6590 7425 7780 9320 10465 4260 5330 6105 8495 9735 10810 3685 4595 5530 6435 9160 10070 ...

Page 257: ...t for duplex copying from upper drawer A3 1 sheet 3860 5625 5830 9235 1530 3565 6755 8775 0 2515 5585 7735 590 2590 5820 7820 4505 5685 5830 7230 4920 7045 4345 6360 Exit sensor Registration sensor Registration clutch ADU entrance sensor ADU clutch ADU exit sensor ADU motor ADU Equipment ...

Page 258: ...motor rotates to the direction A the upper transport roller is rotated driven by the gears and belt The ADU clutch is then turned ON and the middle transport roller and lower transport roller are rotated Upper transport roller Middle transport roller ADU motor ADU clutch Lower transport roller A Fig 14 301 ...

Page 259: ...Yes No ADU transport jam E510 ADU entrance sensor ON ADU motor ON Specified time has passed Specified time has passed Exit motor reverse rotation ON Specified time has passed Paper is transported to the first stopping position in ADU Trailing edge of first paper turned ON the ADU exit sensor ADU exit sensor check the arrival ADU motor stopped ADU motor ON ...

Page 260: ...E110 Registration process completed ADU motor stopped ADU clutch OFF No No ADU paper feeding command signal received ADU feeding operation started Next paper is ready for the registration Registration sensor ON Registration in process ADU motor clutch ON ADU motor stopped ADU clutch OFF A Fig 14 402 ...

Page 261: ...f the upper and lower drawers Fig 14 503 3 Remove 2 screws and take off the right rear hinge cover Fig 14 502 2 Remove 2 screws and take off the right front hinge cover Fig 14 504 4 Remove 2 screws and take off the right lower cover Right front hinge cover Screw Screw Right rear hinge cover Screw Right lower cover Fig 14 501 ...

Page 262: ... ground wires B ADU inside rear cover 1 Take off the ADU Chapter 14 5 A 2 Remove 2 screws and take off the ADU inside rear cover C ADU opening closing switch 1 Take off the ADU Chapter 14 5 A 2 Take off the ADU inside rear cover Chapter 14 5 B 3 Disconnect the connector and release the latch to take off the ADU opening closing switch Fig 14 508 Snap pin ADU inside rear cover Screw ADU opening clos...

Page 263: ... 5 A to 14 5 D 2 Remove 4 screws and take off the ADU cover Fig 14 510 D Paper guide 1 Take off the ADU Chapter 14 5 A 2 Release the fulcrum on the front side and take off the paper guide F Rear latch 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Remove the spring Fig 14 511 Fig 14 512 Paper guide Screw ADU cover Screw Spri...

Page 264: ...e ADU exit sensor Fig 14 514 Fig 14 515 Fig 14 516 G Opening Closing lever 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Remove 2 screws and take off the opening closing lever Fig 14 513 ADU board I ADU driving PC board ADU board 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover C...

Page 265: ...r cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Take off the ADU motor Chapter 14 5 J 3 Remove 3 screws and take off the ADU gear unit Note Match the protrusion of clutch with the position shown in the figure when assembling L ADU clutch 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 T...

Page 266: ...g closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Remove 2 screws and take off the opening closing lever 3 Remove the spring 4 Remove the screw and release the rear latch 6 Loosen 1 setscrew and take off the ADU clutch Fig 14 521 Fig 14 522 Fig 14 523 Fig 14 524 Spring Screw Rear latch Setscrew ADU clutch Screw Opening Closing lever ...

Page 267: ...ff the upper transport roller 6 Remove the clip pulley pin and belt on the rear side Fig 14 525 Fig 14 526 Fig 14 527 Fig 14 528 N Middle transport roller 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Take off the ADU board Screw Bracket Pin Pulley Belt Clip Clip Bushing Bushing Upper transport roller ADU board ...

Page 268: ... middle transport roller O Lower transport roller 1 Take off the ADU ADU inside rear cover ADU opening closing switch paper guide and ADU cover Chapter 14 5 A to 14 5 E 2 Take off the ADU motor the ADU gear unit and the ADU clutch Chapter 14 5 J to 14 5 L 3 Remove the clip on the rear side Fig 14 529 Fig 14 530 Fig 14 531 Fig 14 532 Pin Clip Pulley Belt Clip Bushing Middle transport roller Bushing...

Page 269: ...p Belt Lower transport roller 5 Remove 2 bushing and take off the lower trans port roller Fig 14 534 Fig 14 535 6 Remove 4 E rings and take off 2 rollers Notes 1 The roller has a one way clutch inside When installing rollers pay attention to the rotation direction 2 Replace 2 rollers at a time Bushing Roller E ring E ring E ring Roller Bushing Pulley ...

Page 270: ...e STUDIO350 450 AUTOMATIC DUPLEXING UNIT 14 20 November 2003 TOSHIBA TEC 14 ...

Page 271: ...itch of the equipment is turned ON power starts supplying to all the lines only when two doors front cover and jam access cover are closed 2 Stopping line output When the main switch of the equipment is turned OFF PWR DN signal is output after the instanta neous outage insurance time 20 ms or more elapses and then the supply of each voltage stops If the supply of voltage of the main line 3 3VA 5 1...

Page 272: ...in 25 Output to the SYS board 5 1VB CN413 Pins 3 and 4 Output to the LGC board PFP LCF via LGC board Bridge unit Job separator Offset tray via LGC board 5 1VB CN413 Pin 11 Output to the FIL board or FUS board 5 1VB CN415 Pins 5 and 6 Output to the RADF 5 1VB CN415 Pins 21 and 22 Output to the SLG board 5 1VB CN416 Pin 1 Output to the finisher 3 12V 12VA CN412 Pin 7 Output to the SYS board 12VB CN4...

Page 273: ...ia LGC board 24VD3 CN415 Pins 1 and 2 Output to the RADF 24VD4 CN415 Pins 9 and 10 Output to the SLG board 24VD5 CN416 Pin 3 Output to the finisher Output connector Not linked with the door switch CN412 For the SYS board CN413 For the LGC board FIL board FUS board FAX board PFP LCF via LCG board Bridge unit Job separator Offset tray via LGC board CN415 For the SLG board RADF CN416 For the finisher...

Page 274: ...board cooling fan Developer unit cooling fan 1 Developer unit cooling fan 2 Auto toner sensor Registration clutch Developer drive clutch Discharge LED Key copy counter Copy key card Scan motor SLG board cooling fan Exposure lamp Lamp inverter Voltage 24VD1 24VD2 24VD3 24VD4 24VD5 Board Unit LGC Power supply PFP LCF LGC RADF SLG Finisher Fuse type F3 8A Semi time lag F4 8A Semi time lag F5 4A Semi ...

Page 275: ... 1VA CN412 SYS board 12VB CN413 LGC board 12VA CN412 SYS board 24VD5 CN416 Finisher 24VD3 CN415 RADF 24VB CN413 FAX board 12VB CN412 SYS board 24VD2 CN414 LGC board Bridge unit Job separator Offset tray via LGC board 3 3VB CN412 SYS board 3 3VB CN413 LGC board 3 3VB CN415 SLG board 5 1VB CN412 SYS board 5 1VB CN413 LGC board FIL board FUS board PFP LCF via LGC board Bridge unit Job separator Offse...

Page 276: ...higher 5ms or higher 5ms or higher 0ms or higher 0ms or higher 10ms to 120ms 0ms or higher 3 2V or higher 4 95V or higher 3 2V or higher 4 95V or higher 3 2V or higher 0ms to 200ms 4 95V or higher 10ms or lower 11 4V or higher 11 4V or higher 3 3VA Linked with main switch 5 1VA Linked with main switch 12VA 12VA Linked with main switch 3 3VB Linked with main switch 5 1VB Linked with main switch 5 1...

Page 277: ...TWD CND MODELS STANDARD NAD MJD MODELS OPTION 2 1 2 1 AC N MAIN AC N OUT AC GND AC L OUT AC L MAIN AC N AC L AC N MAIN AC L MAIN LOAD AC N AC L AC N MAIN AC L MAIN AC N DOOR AC L DOOR AC IN THM N AC IN THM N AC IN THM N AC IN L 5V AC ADAPTER DRM DH PS IH AC DC DC NF AC DC DC NF 1 3 2 4 1 2 1 2 3 4 5 6 3 4 5 6 4 3 3 2 2 1 3 2 1 1 4 5 6 3 2 1 4 3 2 1 3 3 2 2 1 1 2 4 1 2 3 6 12 11 1 4 1 3 CN413 J598 ...

Page 278: ...e STUDIO350 450 POWER SUPPLY UNIT 15 8 November 2003 TOSHIBA TEC 15 ...

Page 279: ...November 2003 TOSHIBA TEC 16 1 e STUDIO350 450 PC BOARDS 16 16 PC BOARDS 1 PWA F SYS ...

Page 280: ...e STUDIO350 450 PC BOARDS 16 2 November 2003 TOSHIBA TEC 16 2 PWA F LGC ...

Page 281: ...November 2003 TOSHIBA TEC 16 3 e STUDIO350 450 PC BOARDS 16 3 PWA F SLG 4 PWA F CCD 5 PWA F LRL ...

Page 282: ...e STUDIO350 450 PC BOARDS 16 4 November 2003 TOSHIBA TEC 16 6 PWA F LDR 7 PWA F SNS 8 PWA F ADU ...

Page 283: ...November 2003 TOSHIBA TEC 16 5 e STUDIO350 450 PC BOARDS 16 9 PWA F DSP 10 PWA F KEY ...

Page 284: ...e STUDIO350 450 PC BOARDS 16 6 November 2003 TOSHIBA TEC 16 11 PWA F FIL NAD SAD TWD models Standard 12 PWA F FUS ASD AUD CND models Standard MJD model Option ...

Page 285: ......

Page 286: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8442 JAPAN ...

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Toshiba e-STUDIO350, Service Manual, Page: 212 / 286

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