Toshiba e-STUDIO 206 Service Manual Download Page 165 | Manualshive

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11

© February 2007 TOSHIBA TEC CORPORATION All rights reserved

e-STUDIO166/206

DRUM RELATED SECTION

11 - 5

11.4

High-Voltage Output Control Circuit

11.4.1

General description

In this equipment, the high-voltage generation circuit is included in the switching regulator. It is con-
trolled by the ON/OFF signal of each bias output from the ASIC on the MAIN board and reference volt-
age Vc of each bias output from the SoC via the D/A converter. It generates the output current and
voltage of each bias according to the +24VCOV-OFF input from the low-voltage generation circuit of the
switching regulator.

Fig. 11-3

Switching regulator

[Low-voltage section]

[High-voltage section]

HVMVR-1

HVDTR-1

HVTVR-1

HVSAV-1

HVTM-0

HVSDWN-0

HVTAC-0

HVCLK-0

HVTT-0

HVTSP-0

HVTGB-0

Flash ROM

SoC

MAIN board

ASIC

D/A

converter

Digital data

Adjustment
value

Analog data

(Reference voltage: Vc)

Transfer guide

bias

Transfer

bias

Separation

bias

Developer bias

Charger bias

Leakage detection

Developer

DC

Developer

AC

Needle electrode

Grid

Magnetic roller

Transfer charger

Separation charger

Transfer guide

Grid bias

Needle

electrode

bias

+24VCOV-OFF

+24VCOV-OFF

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Summary of Contents for e-STUDIO 206

Page 1: ...SERVICE MANUAL MULTIFUNCTIONAL DIGITAL SYSTEMS e STUDIO166 206 File No SME060035A0 R061121D3300 TTEC Ver01_2007 03 ...

Page 2: ...ndows NT and the brand names and product names of other Microsoft prod ucts are trademarks or registered trademarks of Microsoft Corporation in the U S and or other coun tries Molykote is a registered trademark of Dow Corning Corporation Other company names and product names in this manual are the trademarks of their respective companies 2007 TOSHIBA TEC CORPORATION All rights reserved Under the c...

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

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

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

Page 6: ......

Page 7: ... 3 3 Comparison with e STUDIO230 280 3 13 4 GENERAL OPERATION 4 1 4 1 Overview of Operation 4 1 4 2 Description of Operation 4 2 4 2 1 Warming up 4 2 4 2 2 Ready state ready for copying 4 2 4 2 3 Drawer feed copying 4 3 4 2 4 Bypass feed copying 4 4 4 2 5 Interruption copying 4 4 4 3 Detection of Abnormality 4 5 4 3 1 Types of abnormality 4 5 4 3 2 Description of abnormality 4 6 4 4 Flow Chart 4 9...

Page 8: ...R FEEDING SYSTEM 10 1 10 1 General Description 10 1 10 2 Configuration 10 2 10 3 Functions 10 3 10 4 Operation 10 5 10 4 1 Drawer 10 5 10 4 2 Bypass tray 10 7 10 4 3 General operation 10 9 10 5 Disassembly and Replacement 10 10 11 DRUM RELATED SECTION 11 1 11 1 General Description 11 1 11 2 Configuration 11 2 11 3 Functions 11 3 11 4 High Voltage Output Control Circuit 11 5 11 4 1 General descript...

Page 9: ... 13 1 General Description 13 1 13 2 Configurations 13 2 13 3 Functions 13 3 13 4 Operation 13 4 13 5 Fuser Unit Control Circuit 13 5 13 5 1 Configuration 13 5 13 5 2 Temperature detection section 13 6 13 6 Disassembly and Replacement 13 11 14 POWER SUPPLY UNIT 14 1 14 1 Construction 14 1 14 2 Operation of DC Output Circuit 14 2 14 3 Output Channel 14 3 14 4 Fuse 14 4 14 5 Configuration of Power Su...

Page 10: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved CONTENTS 4 ...

Page 11: ...able The copy speed in the above table are available when originals are manually placed for single side multiple copying When the ADF is used the copy speed of 16 20 sheets per minute is only available under the fol lowing conditions Original Mode Single side original A4 LT size APS automatic density are not selected Number of sheets 16 20 or more Reproduction ratio 100 Values in are for e STUDIO2...

Page 12: ...ailing edges 5 0 2 0 mm Side edges 5 0 2 0 mm print Paper feeding Standard drawer 1 drawer stack height 28 mm equivalent to 250 sheets 64 to 80 g m2 17 to 22 lb Bond Bypass feeding Stack height 11 8 mm equivalent to 100 sheets 64 to 80 g m2 17 to 22 lb Bond Paper Feed Unit PFU Option One drawer stack height 28 mm equivalent to 250 sheets 64 to 80 g m2 17 to 22 lb Bond Capacity of originals in the ...

Page 13: ...b excluding the developer material and toner Power requirements AC 110 V 13 2 A 115 V or 127 V 12 A 220 240 V or 240 V 8 A 50 60 Hz The acceptable value of each voltage is 10 Power consumption 1 5 kW or less 100 V series 1 6 kW or less 200 V series The electric power is supplied to the ADF and PFU through the equipment Total counter Electronical counter Dimensions of the equipment W 600 x D 643 x ...

Page 14: ... s manual 1 pc Operator s manual pocket 1 pc for NAD Power cable 1 pc CD ROM 2 pcs Rubber cap 6 pcs for MJD ASD ASU and SAD 2 pcs for NAD CND AUD TWD KRD and ARD Transfer charger wire cleaner installed inside of the transfer cover 1 pc Drum installed inside of the equipment 1 pc Developer material 1 pc Nozzle 1 pc for NAD Toner cartridge 1 pc Warranty sheet 1 pc for NAD and CND Setup report 1 set ...

Page 15: ...TUDIO166 206 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 5 1 3 Options Platen Cover KA 1640PC C Automatic Document Feeder ADF MR 2017 C Paper Feed Unit PFU MY 1027 C Expansion Memory GC 1240 C Operator s manual pocket KK 1660 C Damp Heater MF 1640U E Desk MH 1640 ...

Page 16: ... for China OD 2320 for China Toner cartridge PS ZT1640 4 for North America PS ZT1640D 4 for Asia Central and South America PS ZT1640D5K 4 for Asia Central and South America PS ZT1640C 4 for China PS ZT1640C5K 4 for China PS ZT1640T 4 for Taiwan PS ZT1640E 1 for Europe PS ZT1640E5K 1 for Europe Developer material D 2320 except for China D 2320C for China ...

Page 17: ...ION All rights reserved e STUDIO166 206 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 7 1 5 System List Fig 1 2 Platen Cover KA 1640PC Desk MH 1640 Expansion Memory GC 1240 Paper Feed Unit PFU MY 1027 Automatic Document Feeder ADF MR 2017 ...

Page 18: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 8 ...

Page 19: ... DH1 A5 Scanner damp heater Right side DH2 A6 Scanner damp heater thermostat THMO2 B1 Laser optical unit B2 Polygonal motor M4 C1 Pickup roller C2 Separation claw C3 Paper empty sensor S7 C4 Registration sensor S4 C5 Registration roller E1 Bypass pickup roller E2 Bypass feed roller E3 Bypass separation pad A2 A1 A3 B1 B2 C1 C2 C3 E1 E2 E4 E5 E3 C4 C5 J1 J2 J3 J4 J5 J8 J9 J7 J6 H5 H1 H2 G1 G2 G3 I1...

Page 20: ...Mixer 1 I3 Mixer 2 I4 Mixer 3 I5 Doctor blade I6 Auto toner sensor S6 I7 Toner recovery auger I8 Toner recycle auger I9 Drum thermistor THMS4 I10 Drum damp heater DH3 I11 Drum damp heater thermostat THMO3 J1 Fuser roller J2 Pressure roller J3 Fuser roller separation finger J4 Center heater lamp LAMP1 J5 Side heater lamp LAMP2 J6 Center Side Edge thermistor THMS1 2 3 J7 Fuser thermostat THMO1 J8 Ex...

Page 21: ... 3 2 Rear side Fig 2 2 M1 Scan motor M2 Toner motor M3 Main motor M5 Exhaust fan M6 Switching regulator cooling fan S1 CIS home position sensor S2 Platen sensor SW5 Drawer detection switch CLT1 Registration clutch SOL1 Pickup solenoid SOL2 Bypass pickup solenoid M1 M2 M3 SOL1 SOL2 M6 M5 CLT1 SW5 S2 S1 ...

Page 22: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 4 2 2 Electric Parts Layout A Scanner control panel Fig 2 3 M1 DH1 DH2 THMO2 S2 S1 CIS LPNL ...

Page 23: ...2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 OUTLINE OF THE MACHINE 2 5 B Power supply section switches Fig 2 4 SW2 SW3 PS S3 M6 SW1 SW4 ...

Page 24: ...06 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 6 C Laser optical unit fuser unit toner cartridge section Fig 2 5 S5 M2 CTIF CTRG M4 THMO1 THMS1 THMS2 THMS3 SNS LDR LAMP2 LAMP1 ...

Page 25: ...2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 OUTLINE OF THE MACHINE 2 7 D Developer unit section Fig 2 6 M5 ERS S6 THMS4 DH3 THMO3 FUS ...

Page 26: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 8 E Driving section Fig 2 7 CLT1 M3 MAIN SRAM S4 SOL1 ...

Page 27: ...2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 OUTLINE OF THE MACHINE 2 9 F Drawer section Fig 2 8 S7 SW5 ...

Page 28: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 10 G Bypass unit Fig 2 9 S8 SOL2 ...

Page 29: ...tor Driving the CIS Fig 2 3 10 1 M2 TNR MOT Toner motor Supplying the toner Fig 2 5 12 15 M3 MAIN MOT Main motor Driving the drum developer unit regis tration roller Pickup roller feed roller cleaner unit Fig 2 7 12 2 M4 M DC POL Polygonal motor Driving the polygonal mirror Fig 2 5 5 13 M5 EXT FAN MOT Exhaust fan Exhausting ozone and cooling down the equipment inside Fig 2 6 11 23 M6 PS FAN MOT Sw...

Page 30: ...Fig 2 8 15 107 S8 SFB SNR Bypass paper sensor Detecting presence absence of paper on the bypass tray Fig 2 9 13 101 SW1 MAIN SW Main switch Turning ON OFF of the equipment Fig 2 4 5 4 SW2 ADU COV INTLCK SW ADU cover opening closing interlock switch Controlling cutoff and supply of the 24V voltage by opening closing of the ADU cover Fig 2 4 6 8 SW3 FRNT COV INTLCK SW Front cover opening closing int...

Page 31: ...d Fig 2 5 7 30 CTRG PWA F CTRG Toner cartridge PC board CTRG board Storing the status of the toner cartridge Fig 2 5 103 3 FUS PWA F FUS Fuse PC board FUS board Supplying power to each damp heater Optional for NAD MJD CND model standard for other models Fig 2 6 7 12 Symbol Name Function Remarks P I LAMP1 CNTR LAMP Center heater lamp Heating the center section of the fuser roller Fig 2 5 23 12 LAMP...

Page 32: ...DRM Drum thermistor Detecting the temperature on the drum surface Fig 2 6 21 49 THMO1 THERMO FSR Fuser thermostat Preventing overheating in the fuser unit Fig 2 5 23 5 THMO2 THERMO SCN DH Scanner damp heater thermostat Preventing overheating of the scanner damp heater Optional for NAD MJD CND model standard for other models Fig 2 3 9 20 THMO3 THERMO DRM DH Drum damp heater thermostat Preventing ov...

Page 33: ...verter A D converter SoC System controller MAIN board ADF 8 Scan motor M Fuser unit Auto toner sensor Developer unit AC DC DC High voltage Laser optical unit SNS board Laser beam sensor LDR board Laser diode ASIC 16 SDRAM 16 MB 16 Flash ROM 2 MB 8 ASIC I O port 16 SRAM 128 kB Battery SDRAM 64 MB SDRAM bus 16 bit CPU bus 16 bit 16 Download JIG 16 Control panel PFU Option Sensors Switches Motors Sol...

Page 34: ...originals and the printing of data SRAM board This is the board on which the SRAM for storing the user s setting information and counter value and its backup function are mounted When the MAIN board is replaced attaching this board to the new MAIN board can assume the data of the previous equipment LPNL board This is the board on which each button switch and LED on the control panel are mounted CT...

Page 35: ... It outputs the H sync signal to the SoC on the MAIN board PS ACC This is the unit to generate each DC high low voltage which is used in the equipment from the external AC electric power input This is then provided to each electric part FUS board This is the board to provide AC electric power for driving the damp heater Optional for NAD MJD CND model standard for other models CIS This is the unit ...

Page 36: ...TLINE OF THE MACHINE 2 18 2 5 Disassembly and Replacement of Covers A Front cover B Inner tray 1 Open the front cover 2 Release the upper hinge 3 Take off the front cover while lifting it up Fig 2 12 1 Remove 2 screws and take off the Inner tray Fig 2 13 Front cover Inner tray ...

Page 37: ...06 OUTLINE OF THE MACHINE 2 19 C Left cover D Tray rear cover 1 Take off the Inner tray P 2 18 B Inner tray 2 Remove 4 screws and take off the left cover Fig 2 14 1 Take off the left cover P 2 19 C Left cover 2 Take off the tray rear cover Fig 2 15 Left cover Tray rear cover ...

Page 38: ...20 E Front right cover F Front upper cover 1 Take off the front cover P 2 18 A Front cover 2 Pull out the toner cartridge 3 Open the ADU cover 4 Remove 2 screws and take off the front right cover Fig 2 16 1 Remove 1 screw and take off the front upper cover Fig 2 17 Front right cover Front upper cover ...

Page 39: ... side 4 Remove 1 screw and take off the ADU stop per on the rear side Note Be careful not to fall off the ADU cover when the screws are removed from the ADU stop per Fig 2 18 5 Take off the ADU cover while sliding it toward the right Fig 2 19 1 Take off the front cover P 2 18 A Front cover 2 Open the ADU cover 3 Pull out the drawer 4 Remove 2 screws and take off the right front cover Fig 2 20 ADU ...

Page 40: ...F THE MACHINE 2 22 I Right rear cover J Rear cover 1 Open the ADU cover 2 Remove 1 screw and take off the ADU stop per on the rear side 3 Take off the 2 screw and take off the right rear cover Fig 2 21 1 Remove 5 screws and take off the rear cover Fig 2 22 Right rear cover Rear cover ...

Page 41: ...ness to the MAIN board with its erectrode side down An error CA2 will be displayed if the connection is incor rect Fig 2 23 3 Remove 6 screws and take off the MAIN board Notes 1 When replacing the MAIN board also attach the SRAM board to the new MAIN board from the old MAIN board 2 Be sure to perform 08 389 after the SRAM board has been replaced 3 Be sure to perform 05 310 with the platen cover or...

Page 42: ...er P 2 22 J Rear cover 2 Release 1 lock support and take off the SRAM board Notes 1 Be sure to perform 08 388 after the SRAM board has been replaced 2 Perform 05 310 with the platen cover and the ADF closed after replacing the SRAM board 3 Make sure that the direction of the battery on the SRAM board is correct when replacing it Fig 2 25 Fig 2 26 1 Take off the rear cover P 2 22 J Rear cover 2 Rem...

Page 43: ...gulator unit PS 3 Disconnect 2 connectors remove 1 screw and then take off the fuse PC board by lifting it up Fig 2 28 Note When the fuse PC board is installed as options remove the rear cover P 2 22 J Rear cover and disconnect connec tors before performing the procedure below Fig 2 29 Connector Fuse PC board Connector ...

Page 44: ...nectors to the correct faston terminals on the switching regulator board Connector Harness F Red Black thick E Blue White thick D White Black thin C White Red thin B White Red thick A White White thick Fig 2 30 Fig 2 31 3 Remove 2 screws slide the switching regula tor unit with the whole case slightly to the front and then lift it up to take it off Fig 2 32 F E D C B A Switching regulator unit ...

Page 45: ...ove 1 screw and 1 ground wire Note Make sure that the position is correct when inserting the connector Fig 2 33 Fig 2 34 6 Remove 8 screws release 1 locking sup ports and take off the switching regulator board Fig 2 35 Connector Connector 1 2 3 4 White Gray Black Brown Green Yellow Black White Switching regulator board Locking support ...

Page 46: ...eserved OUTLINE OF THE MACHINE 2 28 E Switching regulator cooling fan M6 1 Take off the left cover P 2 19 C Left cover 2 Disconnect 1 connector and take off the switching regulator cooling fan while sliding it upward Fig 2 36 Switching regulator cooling fan Connector ...

Page 47: ...LINE OF THE MACHINE 2 29 2 7 Removal and Installation of Options A MR 2017 Automatic Document Feeder ADF 1 Turn the power OFF and unplug the power cable 2 Remove 1 screw and take off the connector cover Fig 2 37 3 Remove the ground wire Fig 2 38 4 Disconnect the connector Fig 2 39 ...

Page 48: ...ebruary 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 30 5 Remove 1 screw on the rear right side Fig 2 40 6 Remove 1 screw and 1 washer on the rear left side Fig 2 41 7 Open the ADF Fig 2 42 ...

Page 49: ...UTLINE OF THE MACHINE 2 31 B MY 1027 Paper Feed Unit PFU 8 Remove 2 screws on the front side Fig 2 43 9 Slide the ADF backward and take off by lift ing it up Fig 2 44 1 Turn the power OFF and unplug the power cable 2 Remove 1 screw and take off the PFU con nector cover Fig 2 45 ...

Page 50: ...IO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 32 3 Remove the ground wire Fig 2 46 4 Disconnect the connector Fig 2 47 5 Install the PFU connector cover Fig 2 48 ...

Page 51: ...INE 2 33 6 Take off the rear cover P 2 22 J Rear cover 7 Disconnect 1 connector optional damp heater Release the harness from the har ness clamp Fig 2 49 8 Take off the drawer of the equipment and PFU drawer Fig 2 50 9 Remove 1 screw and take off 1 fixing brack ets on the front left side Fig 2 51 ...

Page 52: ... OUTLINE OF THE MACHINE 2 34 10 Remove 1 screw and take off 1 fixing brack ets on the front right side Fig 2 52 11 Remove 1 screw and take off 1 fixing brack ets on the rear left side Fig 2 53 12 Remove 1 screw and take off 1 fixing brack ets on the rear right side Fig 2 54 ...

Page 53: ...2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 OUTLINE OF THE MACHINE 2 35 13 Lift up the equipment and take off the PFU Fig 2 55 ...

Page 54: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 36 ...

Page 55: ...r from the drum 4 Development Negatively charged toner adheres to the photoconductive drum and forms visible image 10 Discharging Eliminates the residual nega tive charge from the surface of the photo conductive drum 5 Transfer bias Improves transfer efficiency 6 Transfer Transfers the visible toner image on the photoconductive drum onto paper Data reading scanning CIS 600 dpi 7084 pixel Image pro...

Page 56: ...reased works as a conductor Weak light Resistance is increased works as an insulator Fig 3 2 Formation of electrostatic latent image In the processes of charging data reading data writing discharging described later negative poten tial of the areas on the drum corresponding to black areas of the original are eliminated while the areas on the drum corresponding to white areas retains the negative c...

Page 57: ...ol circuit Fig 3 4 3 Data reading scanning Data reading is the process of illuminating the original with light and converting the reflected light into electrical signals This equipment uses the CIS Contact Image Sensor for data reading The optical image information read by the CIS is converted into electrical signals image signals which are then transmitted to the image processing section Fig 3 5 ...

Page 58: ...sing section into optical signal and exposing the drum surface with the light Semiconductive laser element converts image signals transmitted from the image processing sec tion into optical signal laser emission to expose the drum surface and form an electrostatic latent image on it Fig 3 7 Semiconductive laser element Polygonal mirror Photo conductive drum Image processing section LDR board ...

Page 59: ...ic roller reverse development method Fig 3 10 Charging AC bias To obtain the stable development characteristics AC bias approx 1 100 V is charged to the development bias DC bias Fig 3 8 Fig 3 9 Drum Magnetic roller Photoconductive layer Magnet Magnetic roller Photocon ductive drum Aluminum base Toner Carrier always attracted onto the magnet Toner Bias voltage 357 VDC Toner The potential of the pho...

Page 60: ...Carrier Consists of the ferrite and resin coating on its surface to provide consistent frictional electrification Note If the developer material is used for a long time beyond its normal life span the toner is caked onto the carrier 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 develo...

Page 61: ...he south and north poles are arranged inside the magnetic roller as shown in the right figure The developer material forms a brush like fluff which contacts the photoconductive drum surface This is caused by the magnetic force lines between the south and north poles Fig 3 13 N S S Magnetic force line Magnetic roller Photoconductive drum ...

Page 62: ...he existence of solid black when making prints when a book is copied and the original cover is partially opened Temperature and humidity in the room when making prints 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 Is this graph the toner consumption for copying in TEXT PHOTO mode us...

Page 63: ...er unit transport guide through the paper Output is controlled as follows to realizes the desirable transfability Fig 3 16 Method A paper passing the side of the drum is charged to the opposite polarity to the that of toner by the corona discharge of the transfer charger The toner moves from the drum surface onto the paper Fig 3 15 Paper position against transfer point Transfer output From leading...

Page 64: ... finger is used to forcibly separate the paper which was left around the drum Fig 3 18 Method Apply negative DC bias to the separation charger The positive charge on the paper is decreased The electrostatic adherence force between the paper and drum becomes weak The paper is separated from the drum by its own stiffness Fig 3 17 Paper position against transfer point Separation output From leading e...

Page 65: ...s then caught by the recovery blade Fig 3 21 Method The melting point of the toner main ingredi ent resin is 90 100 C Fig 3 19 Fig 3 20 Heat 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 pass...

Page 66: ...maining on the photoconduc tive drum surface causes ungiven application of the charge for the next printing Fig 3 22 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 conductive All of the negative charge remaining on the pho ...

Page 67: ...C DC 357 V Adjustable output during printing AC 1100 V Adjustment not required during printing DC 150 V Fixed others T 1640 T 1640E T 1640D T 1640C T 1640T DC 340 V Adjustment output during printing AC 1100 V Adjustment not required during printing No DC positive output 5 Transfer Transfer bias Adjustable output Constant current 600 V Adjustment not required 565 V Adjustment not required 6 Separat...

Page 68: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 3 14 ...

Page 69: ...erved e STUDIO166 206 GENERAL OPERATION 4 1 4 GENERAL OPERATION 4 1 Overview of Operation Operation of equipment Operation during initializing pre running and ready Copying operation Drawer feed copying by START button Bypass feed copying Interrupt copying ...

Page 70: ...e LED of CIS is turned OFF The CIS unit moves to the home position Ready state LED START ON 2 Pre running operation Only when the temperature is at 16 C or less The pre running operation is started when the temperature of the fuser roller surface reaches a cer tain temperature The main motor is turned ON Fuser roller rotated Drum rotated Pre running operation stops after 15 seconds 3 When the surf...

Page 71: ...Registration clutch ON after a certain period of time paper is transported to the transfer area Copy counter operates 4 After the registration clutch is turned ON Transfer charger ON after a certain period of time Copy counter operates 5 Completion of scanning Scan motor OFF CIS LED OFF Registration clutch OFF after the trailing edge of the paper passed the registration roller Ready state 6 Paper ...

Page 72: ...pass pickup roller is lowered The bypass feed roller start to rotate Paper reaches the registration roller Aligning operation After a certain period of time the bypass pickup solenoid OFF 4 Hereafter the operation 3 through 6 of P 4 3 4 2 3 Drawer feed copying is repeated 4 2 5 Interruption copying 1 Press the INTERRUPT button LED INTERRUPT ON Copying operation in progress is temporarily stopped C...

Page 73: ...ing to the type of abnormality are displayed 4 3 1 Types of abnormality 1 Abnormality cleared without turning OFF the door switch A Add paper B Pick up failure in bypass 2 Abnormality not cleared without turning OFF the door switch C Misfeed in equipment D Replace the toner cartridge E Developer unit not installed properly 3 Abnormality not cleared without turning OFF the main switch F Call for se...

Page 74: ...is not installed No drawer detected LED Add paper ON START button disabled When drawer is installed Drawer detected Paper empty sensor OFF LED Add paper ON START button disabled During bypass feeding Bypass pickup solenoid ON Registration sensor is not turned ON in a fixed period of time Clear paper symbol is displayed E12 Copying operation is disabled Solution The bypass paper sensor is turned OF...

Page 75: ...f the exit sensor is not turned OFF after 1 759 sec Paper jam E02 The copying operation is stopped Immediately after the power ON Any of all sensors on paper transport path detects paper ON Paper jam E03 Front cover is opened during copying Paper jam E41 Registration sensor detects jamming of the leading edge of paper Registration sensor is not turned ON in a fixed period of time after the feeding...

Page 76: ...is not turned ON in a fixed period of time after the pickup solenoid is turned ON Paper jam E14 Toner density becomes low Auto toner sensor detects the absence of the toner Control circuit The toner lamp brinks the copying operation disabled Solution Open the front cover and replace the toner cartridge with a new one Toner is supplied copying operation enabled Disconnection of the connectors of th...

Page 77: ... Immediately after the power is turned ON Fig 4 3 NO NO YES YES YES NO NO C21 YES YES YES Heater lamp ON DC power ON Scan motor ON Main switch ON Call for service Restart Paper jam Call for service C26 E03 A B Peak detected Exit sensor ON Home position detected 13 15 seconds elapsed Registration sensor ON Cover is open ...

Page 78: ...ION 4 10 Fig 4 4 YES NO Temperature of the fuser roller ready for pre running A YES NO NO READY B YES YES NO C41 C43 YES C44 CA1 NO Polygonal motor in abnormal condition Fuser roller reached ready temp Thermistor broken Call for service Heater lamp broken Call for service Call for service ...

Page 79: ...A2 Remaining set number 0 NO NO YES Laser OFF Pickup solenoid ON Pickup solenoid OFF Registration clutch ON Registration clutch OFF Counter ON OFF NO YES OK NG C Processing system control Polygonal motor normal rotation Processing system control completed Transport system control Scanning system control Scanning system control completed Remaining set number 0 Exit sensor detected leading edge of p...

Page 80: ...ORPORATION All rights reserved GENERAL OPERATION 4 12 Fig 4 6 C OK NG Polygonal motor OFF Main charger OFF Discharge LED OFF Developer bias OFF Main motor OFF E02 Paper jam Exit sensor detected trailing edge of paper Drum rotation reversed READY ...

Page 81: ...d LED Display The control panel consists of button switches to operate the equipment and select various modes and LEDs to display codes values and the states including each mode of the equipment The button switches and the LEDs are mounted on the control panel PC board LPNL and are installed the inside of the control panel Fig 5 1 ...

Page 82: ...t 3 digits and then the last 3 digits are displayed in order e g 12345678 12 345 678 When the 25 button is pressed the digits shift to the 3 digits of next higher order When the 200 button is pressed they shift to the 3 digits of next lower order 4 ROM version A ROM version is displayed by pressing the key the key and the START button simulta neously The total 8 digits can be displayed the first 2...

Page 83: ... button to perform the setting When the setting needs to be canceled halfway press the FUNCTION CLEAR button 1 2 These codes can be set only when the bypass tray is used 2 This code can be set only for JPD models 3 These codes can be set only for CND models Operation sound setting mode The operation beep sound of this equipment is set on or off in this mode When the density adjustment button light...

Page 84: ...table Copying Pauses copy job Enters into interrupting copy Pausing copy job Resumes copy job Cancels copy job Clears each setting Enters into interrupting copy Downloading firmware In energy sav ing low power mode Enters into waiting state In sleep mode Enters into waiting state Enters into waiting state Enters into waiting state Enters into waiting state Enters into waiting state Interrupting co...

Page 85: ...isplay circuit Example Lighting circuit method of Cover open lamp Fig 5 3 FET Q2 is turned ON when the FET control signal C0 becomes L level Then when the control signal LEDM12 of the LED driver changes to L level the current flows to the cover open lamp LED22 to turn ON the LED Conditions to turn ON the LED The LED is turned ON only when the two conditions below are met 1 The FET connected to the...

Page 86: ...y and Replacement A Control panel unit 1 Remove 3 screws Fig 5 4 2 Take off the control panel unit while lifting it up 3 Disconnect 1 connector Note When installing the control panel unit be sure not to have the harness being caught by the front right cover and the unit Fig 5 5 Connector Control panel unit ...

Page 87: ...panel PC board LPNL 1 Take off the control panel unit P 5 6 A Control panel unit 2 Remove 2 screws and take off the cover while sliding it Fig 5 6 3 Take off 2 brackets by removing 2 screws each Fig 5 7 4 Remove 12 screws and take off the control panel PC board Fig 5 8 Cover Bracket Control panel PC board ...

Page 88: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 5 8 ...

Page 89: ...he LED array mounted on the CIS unit and the reflected light is scanned by the CCD where the optical image data are converted into an analog electri cal signal and then transmitted to the MAIN board After the binarization and the various image pro cessing operations necessary for image formation are performed on the MAIN board the data are transmitted to the writing section Fig 6 1 Original glass ...

Page 90: ...ghts reserved SCANNER 6 2 6 2 Construction Scanning section Original glass Original glass ADF Original glass CIS unit CIS CCD YG LED array RGB light guiding tube Micro lens array Drive section Scan motor M1 CIS home position sensor S1 Others Damp heater DH1 DH2 ...

Page 91: ...t guiding tube to lead each light to the original and a YG LED array and then the reflected light is scanned by the CCD In the CCD method reduction optical method the reflected light of the exposure lamp is LED through mirrors lens and slit to the CCD where the optical to electrical conversion for scanned data is performed In contrast in the CIS method close contact sensor method those operations ...

Page 92: ...ference to the amount of G LED light it is possible to attain a light color which has nearly the same color effect as that of the YG xenon light for the light sensitivity of the CCD This LED array produces the output power of 0 125W X 3 3 Scan motor M1 This is a two phase stepping motor which drives the CIS unit CIS The rotation of the motor is transmitted to the CIS unit through the timing belt t...

Page 93: ...he CIS unit through the timing belt to move the unit to the home position The home position is detected when the actuator installed on the CIS case passes the CIS home position sensor S1 When the START button is pressed the CIS unit starts scanning the original Scanning an original on the ADF The CIS unit CIS stops and stays at the shading position during the shading correction and at the scanning...

Page 94: ...ver IC2 Fig 6 3 M VDD SG VSS MODE2 RESETB MODE1 CWB ENABLE CLOCK VREF Excitation mode setting 2 Fixed at H SCANRST Resetting SCNMD0 Excitation mode Setting 1 SCNDIR Motor rotation direction setting SCNEN Cutting off of the drive output SCNCLK Clock input SCNMVR Voltage to set value for the motor current PG1 PG2 Driver IC IC2 B B A A B B A A 24V 5V GND GND GND 5V IC53 SoC IC23 ASIC MAIN board ...

Page 95: ... be changed ON and after the last pulse goes OFF Cutting off of the drive output SCNEN Input Forcibly turn ON OFF the excitation drive H Normal operation Excited L Excitation drive is forcibly shut off Not excited Excitation mode Setting 1 SCNMD0 Input Sets the excitation mode The setting should not be changed within 7µsec after the first pulse of the CLK comes ON Resetting SCANRST Input Resets th...

Page 96: ...ard generation is performed reading the reflected light amount of the white shading correction plate Black standard generation is also performed reading the light amount when the light source is turned off and according to the result adjustment by the light amount adjustment signal SCNLEDVR1 2 3 1 out put through the D A converter from the SoC is made However the light amount of the green light so...

Page 97: ...lock signals TRCLCK MCLCK RSCLCK output from the SoC on the MAIN board and then it divides the photoelectric converted analog signals into four out put signals CDIN0 to 3 and outputs to the AFE The AFE converts the analog signals into 8 bit digital signals SCNIMGA 0 to 7 and outputs to the SoC Fig 6 5 SoC AFE CCD MAIN board Contact image sensor unit 5V SH TRCLCK CK2B MCLCK RS RSCLCK CDIN1 CDIN2 CD...

Page 98: ...sts of 4 channels as shown in the figure below Each light receiving sensor photoelectronically converts the received light into charge and transfers the charge to each shift register These shift registers then transfer the charge to the direction of the arrows in the figure at the timing of transfer clocking This transfer clock pulse is equally input into every chip and thus all the shift register...

Page 99: ...onic conversion efficiency These differences need to be corrected and this correction is referred to as a shading correction The shading correction is performed by applying a normalization process using the following formula on the black data and the white data obtained in advance to correct the lighting variance and element variation of the image data S K W K I k x k Coefficient S Image data befo...

Page 100: ...rubber caps 2 screws and take off the original glass Notes 1 When handling the original glass take care not to contaminate the surface with fingerprints or such 2 Do not place the original glass directly on the floor 3 When installing the original glass fit 2 guides of the original glass in the groove of the scanner top cover 4 The rubber caps are not installed in the equipment for NAD CND AUD TWD...

Page 101: ...ce it between 2 small guides with its left hand side pushed to the scanner top cover Fig 6 10 1 Take off the original glass P 6 12 A Original glass 2 Take off the front upper cover P 2 20 F Front upper cover 3 Take off the control panel unit P 5 6 A Control panel unit 4 Remove 8 screws and take off the scanner top cover Fig 6 11 1 Take off the scanner top cover P 6 13 B Scanner top cover 2 Disconn...

Page 102: ... jig Also be sure to take off the right rear cover when performing the adjustment P 2 22 I Right rear cover The adjustment procedure is as follows 1 Temporarily fix the screw A and B 2 Hook the belt tension jig to the motor bracket and frame 3 The scan motor is pulled by the belt tension jig Fix the screw A and then B at the stopped position 4 Remove the belt tension jig Fig 6 14 Fig 6 15 Scan mot...

Page 103: ...e position sensor with the bracket Fig 6 16 3 Release 2 latches take off the CIS home position sensor release the harness from harness clamp and disconnect 1 connector Fig 6 17 1 Take off the scanner top cover P 6 13 B Scanner top cover 2 Remove 1 screw and take off the sensor with the bracket 3 Disconnect 1 harness clamp and 1 connec tor Fig 6 18 Bracket CIS home position sensor CIS home position...

Page 104: ...en sensor Fig 6 19 1 Take off the original glass P 6 12 A Original glass 2 Move the CIS unit to the right most position Fig 6 20 Notes Be sure to hold the CIS unit drive belt 1 to move the CIS unit When the CIS unit is moved be sure not to touch the shaft as the silicon oil is applied on it Fig 6 21 Platen sensor CIS unit CIS unit drive belt 1 ...

Page 105: ...edges of the scanner base Fig 6 22 4 Lift up the CIS unit disconnect 1 connector on the bottom of the CIS unit and then take off the CIS unit Notes Take care not to contaminate the CIS unit surface with fingerprints dust or such Be sure to perform 05 310 with the platen cover or the ADF closed after replacing the CIS unit Fig 6 23 5 Release 2 latches each to take off 2 original glass guides from t...

Page 106: ...opper fits in the V groove on the inside of the CIS unit drive belt 1 Fig 6 25 3 Take off the CIS case Fig 6 26 Notes 1 When installing the CIS case be sure to fit the shaft of the equipment in the shaft guide attached on the bottom of the CIS case 2 When installing the CIS case install it so that the L shaped portion of the bottom of the CIS case comes under the CIS unit drive belt 1 Fig 6 27 Bel...

Page 107: ...t drive belt 1 Note When assembling the CIS unit drive belt 1 assemble it while the fixing screw is loos ened Then tighten the fixing screw of the tension bracket Fig 6 29 1 Take off the scanner top cover P 6 13 B Scanner top cover 2 Take off the right rear cover P 2 22 I Right rear cover 3 Take off the CIS unit drive belt 1 P 6 19 H CIS unit drive belt 1 4 Loosen 2 fixing screws of the scan motor...

Page 108: ...CORPORATION All rights reserved SCANNER 6 20 5 Take off the CIS unit drive belt 2 Note When assembling the CIS unit drive belt 2 be sure to perform the tension adjustment for the scan motor P 6 13 C Scan motor M1 Fig 6 31 CIS unit drive belt 2 ...

Page 109: ...ning of original to writing data on the photoconductive drum surface Fig 7 1 The following is the board used for image processing Board Function MAIN board High quality image processing image memory editing gamma correction gradation processing scanner high quality image processing smoothing processing image area control laser related control and printer high quality image processing Memory expans...

Page 110: ... CIS Image processing section A D conversion Shading correction High quality image processing Image memory editing Gamma correction Gradation processing Scanner high quality image processing Smoothing processing Image area control Laser related control Printer high quality image processing MAIN board Laser drive LDR board Image data flow Sorting Optoelectronic conversion Memory Expansion memory ...

Page 111: ...oard is controlled by the CPU on the MAIN board 2 The image processing section on the MAIN board realizes the following when functioning the equip ment High quality image processing Image memory editing Gamma correction Gradation processing Scanner high quality image processing Smoothing processing Image area control Laser related control Printer high quality processing ...

Page 112: ...rocessing Low pass filter processing This processing removes image electrical noise and decreases moire by performing averaging operation between the image signals of the targeted pixel and those of the neighboring pixels to enhance the reproducibility of original Example Density of the targeted pixel position is X Density of pixel positions at front and back of the tar geted pixel are a and b res...

Page 113: ...els to eliminate this phenomenon and realize high reproducibility of original Fig 7 5 2 Image memory editing This function performs editing such as enlargement reduction etc by using a line memory Pixel data for one line in the primary scanning direction is stored in the line memory and the memory is renewed at each line Enlargement Reduction Enlargement Reduction is accomplished by using the line...

Page 114: ...hich selects the printer characteristics giving the priority to gradation reproducibility such as for photographic images 5 Scanner high quality image processing This function corrects the image signals scanned by the scanner and reproduces them in a higher image quality 6 Smoothing processing This function removes jaggy area and output images after processing the smoothing the character outline 7...

Page 115: ...latent image Image signal is converted into the light emission signal of the laser diode on the laser driving PC board LDR then radiated on the drum through the optical elements such as cylinder lenses polygonal mirror and f lens The unit must not be disassembled in the field as they are very sensitive to dust and finely adjusted at the factory Fig 8 1 Fig 8 2 LDR board SNS board H sync returning ...

Page 116: ...eam Since it is not visible be extremely careful when handling the laser optical unit components per forming operations or adjusting the laser beam Also never perform the procedure with other than the specified manuals because you could be exposed to the laser radiation The laser optical unit is completely sealed with a protective cover As long as only the operations of specified manuals are perfo...

Page 117: ...k to the equipment 2 Polygonal motor unit This unit consists of the polygonal motor M4 and polygonal mirror a Polygonal motor M4 This motor rotates the polygonal mirror in high speed The DC motor controls the rotation speed of the mirror motor as follows During ready 0 rpm No rotation During printing 21 521 147 rpm 600dpi Fig 8 4 b Polygonal mirror One laser beam emitted from the laser diode is re...

Page 118: ...unit and it protects the unit from dust a Uniform velocity scanning Since the polygonal mirror is rotating at a uni form velocity the laser beam reflected from the mirror scans over the drum surface at a uniform angular velocity namely the pitch between the dots on the drum is wider at both ends than at the center of the scanning range The f lenses help to correct this difference making all the do...

Page 119: ...PC Auto Power Control needs to be performed to maintain a constant optical output Fig 8 7 A block diagram of the semiconductive laser control circuit is shown below The semiconductive laser performs a monitor efficiency regulation a process to control a monitor current for beam emission amount The initial beam emission is adjusted to be approx 1 6 mW 240 µW on the drum surface The voltage of the m...

Page 120: ...PMTRSTS 0 and then output to the ASIC PMTRSTS 0 signal moves to a low level only when the rotation status of the motor is constant The SoC detects the rotation status with this signal and emits a laser beam only when the rotation status is constant Fig 8 9 Signal Function Low level High level PMTR 0 Polygonal motor ON signal ON OFF PMTRCLK Polygonal motor reference clock PMTRSTS 0 Polygonal motor ...

Page 121: ...isconnect 3 connectors from the MAIN board Note Connect the flat harness to the MAIN board with its erectrode side down An error CA2 will be displayed if the connection is incor rect Fig 8 10 3 Take off the switching regulator unit P 2 25 D Switching regulator unit PS 4 Remove 1 screw 5 Pull out the laser optical unit while lifting it up and take it off Fig 8 11 Connector Connector Laser optical u...

Page 122: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 8 8 ...

Page 123: ...egistration roller pickup roller and exit roller The main motor is a brushless motor and is installed in the drive unit The drive unit consists of gears and timing belts and transmits the driving force of the main motor to each unit The toner motor which drives the toner cartridge is also installed in the drive unit Fig 9 1 Exit roller Fuser roller Toner recovery auger Drum Drive unit Bypass feed ...

Page 124: ...to be driven Drive transmission Main motor M3 Drum Gears Developer unit Mixer Gears Cleaner unit Toner recovery auger Timing belt gears Fuser unit Fuser roller Timing belt gears Rollers Exit roller Pickup roller Bypass feed roller Bypass pickup roller and PFU Timing belt gears Toner motor M2 Toner cartridge Gears ...

Page 125: ...s output from the MAIN board The driving force of the main motor is transmitted to the drum developer unit cleaner unit fuser unit and the rollers which transport the paper via gears and timing belts 2 Toner motor M2 The main motor is a DC motor which is controlled by control signals output from the MAIN board The driving force of the toner motor is transmitted to the toner cartridge via gears ...

Page 126: ...eference clock MMTRCKA from the SoC are compared in terms of the phase and speed and the difference is added to the excitation phase switching section Fluctua tions in the power supply voltage are also added to the value 7 According to the result of step 6 the switching timing of the excitation phase switching section is changed and the FG pulse and the reference clock are controlled to make them ...

Page 127: ...rom the rear side and the drum and developer unit etc start driving MMTRCKA signal This signal is a reference clock which keeps the main motor rotation at a constant speed MMTRPLL 1 signal This is a signal to show that the main motor rotation is in the lock range When the cyclic change of the FG pulse period against the reference clock is within 6 25 this is defined as a lock range the normal rota...

Page 128: ...e off the rear cover P 2 22 J Rear cover 2 Disconnect 1 connector remove 2 screws and then take off the main motor Fig 9 3 1 Take off the rear cover P 2 22 J Rear cover 2 Disconnect 1 connector remove 1 screw take off the toner motor with the bracket and then remove 1 bushing and 1 gear Fig 9 4 Connector Main motor Bracket Connector Bushing Gear Tonner motor ...

Page 129: ...ocess unit 2 Take off the toner motor with the bracket 3 Remove 2 screws and take off the registra tion roller holder Note When installing the registration roller holder align the arm of the registration roller clutch with the rotation stopper of the registration roller holder Fig 9 6 4 Remove 1 clip and take off 1 bushing Fig 9 7 Tonner motor Bracket Registration roller holder Rotation stopper Cl...

Page 130: ...ATION All rights reserved DRIVE UNIT 9 8 5 Disconnect 1 connector remove 3 screws and take off the main motor drive unit Fig 9 8 6 Loosen 1 tensioner fixing screw and remove the tension spring Fig 9 9 Connector Main motor drive unit Tensioner spring ...

Page 131: ...force Follow the procedure bellow to perform tension adjustment when assembling the main motor drive unit Align the tensioner with the punch mark and tighten the tensioner fixing screw Hook the tensioner spring Install the main motor drive unit to the equipment Loosen the tensioner fixing screw Let the spring force produce tension for the belt and tighten the fixing screw Fig 9 10 Fig 9 11 Gear Ge...

Page 132: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRIVE UNIT 9 10 ...

Page 133: ...drawer or bypass tray and transport it to the transfer position The paper feeding system mainly consists of the pickup roller registration roller bypass sensor paper empty sensor registration sensor and the drive system for these compo nents Fig 10 1 Bypass paper sensor Bypass feed roller Bypass pickup roller Bypass separation pad Registration sensor Registration roller Separation claw Paper empty...

Page 134: ...solenoid SOL1 Drawer pickup clutch Paper empty sensor S7 Bypass unit Bypass pickup roller Periodic replacement part Bypass feed roller Periodic replacement part Bypass separation pad Periodic replacement part Bypass sensor S8 Bypass pickup solenoid SOL2 Bypass pickup clutch Bypass feed clutch Registration roller Registration roller clutch CLT1 Registration sensor S4 Drawer detection switch SW5 ...

Page 135: ...r Transports the paper from the bypass pickup roller to the registration roller 7 Bypass separation pad When two or more sheets of paper are transported from the bypass pickup roller since the resis tance force of the separation pad is larger than the frictional force between the sheets the lower sheets are not transported any further 8 Bypass sensor S8 Detects whether paper is set in the bypass t...

Page 136: ...r Then the registration rollers rotate to transport the paper to the transfer position 13 Registration roller clutch CLT1 This is an electromagnetic clutch which drives the registration roller When the registration roller clutch CLT1 is turned ON the drive is transmitted from the main motor M3 to rotate the registra tion roller 14 Registration sensor S4 It is used to detect that the leading edge o...

Page 137: ...s the drive when the pickup solenoid SOL1 is turned ON The pickup roller is rotated one turn by this driving force to pull out a sheet of paper from the drawer The pickup roller stops at its home position for each rotation Therefore when multiple sheets of paper are fed the pickup solenoid SOL1 is turned ON at each rotation One rotation of the pickup roller which is semicircle shaped can transport...

Page 138: ... roller and paper is greater than the friction between two sheets the pickup roller tries to send out a sheet of paper from the top of the stack Because both corners of the paper stack are held by the separation claws the paper on the top of the stack becomes bent and is sent out while the lower paper is not When the picking up force of the roller increases one sheet of paper is finally released f...

Page 139: ...lenoid SOL1 is turned ON the driving force of the main motor M3 is transmitted to the bypass pickup clutch and bypass feed clutch The bypass pickup roller is shifted down by the drive from the bypass pickup clutch And then the bypass pickup roller as well as the bypass feed roller is rotated by the drive from the bypass feed clutch to transport the paper on the bypass tray to the bypass feed rolle...

Page 140: ...n between two sheets of paper is smaller than that between a sheet and the separation pad the lower sheets are not transported any further while the uppermost one is trans ported by the feed roller The paper transported by the bypass feed roller reaches the registration roller After the paper is aligned by the registration roller the bypass pickup solenoid SOL2 is turned OFF to stop the bypass pic...

Page 141: ... one turn Then a sheet of paper is fed and transported to the registration roller The leading edge of the paper turns ON the registration sensor S4 and then the paper stops at the registration roller The registration clutch CLT1 is turned ON and the paper aligned by the registration roller is trans ported to the transfer unit D Bypass feeding The bypass sensor S8 detects the availability of paper ...

Page 142: ...er P 2 21 G ADU cover 2 Remove 1 screw and take off the harness cover Fig 10 6 3 Release the harness from the harness clamp and disconnect 1 connectors Fig 10 7 4 Remove 2 screws and take off the bypass unit by lifting it up Note When installing the bypass unit place the guide behind the transfer unit Fig 10 8 Screw Harness cover Connector Bypass unit Screw Screw Guide ...

Page 143: ... Bypass unit 2 Release each latch to take off the front and rear tray arms 3 Take off the bypass tray Fig 10 9 1 Take off the bypass unit P 10 10 A Bypass unit 2 Remove 2 screws and take off the bypass separation pad unit Fig 10 10 3 Remove 1 screw on the bottom of the bypass separation pad unit and take off the cover Fig 10 11 Latch Bypass tray Bypass separation pad unit Cover ...

Page 144: ...s separation pad while pinching the mounting bracket Fig 10 12 Note When the separation pad is replaced apply one grain of rice sized white grease to the supporting point Fig 10 13 1 Take off the bypass unit P 10 10 A Bypass unit 2 Remove 2 screws and take off the cover Fig 10 14 Bypass separation pad Bypass separation pad White grease Cover ...

Page 145: ... and rear arms with each protrusion on the bypass roller unit When the bracket is removed place it as shown in the figure on the right to prevent the levers from coming off Fig 10 15 Fig 10 16 4 Remove 1 clip and take off the bypass roller unit while sliding it to the front side Note When installing the bypass roller unit insert the shaft into the coupling on the rear side Fig 10 17 Spring Bracket...

Page 146: ...ed roller 1 Take off the bypass roller unit P 10 12 D Bypass roller unit 2 Take off the bypass pickup roller and the shaft Fig 10 18 1 Take off the bypass roller unit P 10 12 D Bypass roller unit 2 Remove 1 clip Then pull out the shaft 3 Take off the bypass feed roller Fig 10 19 Shaft Bypass pickup roller Bypass feed roller Shaft Clip ...

Page 147: ...1 screw on the bottom of the equip ment 2 Take off the bypass sensor with the bracket Fig 10 20 3 Take off the actuator with the spring while pushing the bracket stays wider Fig 10 21 4 Release 2 latches take off the bypass sen sor and disconnect the connector Fig 10 22 Bracket Actuator Spring Bracket Bracket Connector Bypass sensor ...

Page 148: ... Release the harness from the harness clamp and slide the pickup solenoid with the spring upward to take it off Note When installing the bypass pickup solenoid be sure to place the spring between the arm and the solenoid Fig 10 24 1 Take off the bypass unit P 10 10 A Bypass unit 2 Remove 1 E ring 1 bushing and 2 screws Then take off the 1 bracket and 2 gears Fig 10 25 Bypass unit Screw Bypass pick...

Page 149: ...Remove 2 E rings Then remove the gear cover spring and cam out of the shaft Fig 10 27 Note When assembling the bypass pickup clutch be sure to adjust the position of the hook of the spring and cover so that the center slit of the cover and the center of the cam are aligned Fig 10 28 Bypass pickup clutch Cam E ring E ring Gear Shaft Spring Cover Hook Cam Cover Spring ...

Page 150: ...TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 18 5 Remove 1 E ring and take off the bypass feed clutch Fig 10 29 6 Remove the gear cover spring and cap Fig 10 30 Bypass feed clutch E ring Cover Gear Spring Cap ...

Page 151: ...which the damp heater unit is not installed To take it off perform the procedure from step 3 1 Take off the rear cover P 2 22 J Rear cover 2 Release the harness from the harness clamp and disconnect the connector Fig 10 31 3 Take off the process unit P 11 9 A Process unit 4 Remove 1 screw and take off the damp heater unit or dummy plate while sliding it to the rear side and lifting it up Fig 10 32...

Page 152: ...off the drawer 2 Take off the damp heater unit or dummy plate P 10 19 J Damp heater unit DH3 Dummy plate 3 Disconnect 1 connector remove 1 screw and take off the bracket of the paper empty sensor Fig 10 33 4 Release 2 latches and take off the paper empty sensor from the bracket Fig 10 34 Connector Bracket Bracket Paper empty sensor ...

Page 153: ...Notes Be sure to install the pickup roller in the correct direction when reassembling it When it is difficult to take off the pickup roller alternatively follow the procedure below to remove it 1 Take off the damp heater unit or dummy plate P 10 19 J Damp heater unit DH3 Dummy plate 2 Take off 2 pickup rollers by releasing 2 latches each Fig 10 35 Fig 10 36 1 Take off the rear cover P 2 22 J Rear ...

Page 154: ...tor and take off the registration roller clutch Fig 10 38 1 Take off the rear cover P 2 22 J Rear cover 2 Release the harness from the harness clamp and disconnect 1 connector Fig 10 39 3 Remove 1 screw and take off the pickup solenoid bracket Note Be sure not to drop the bushing Fig 10 40 Registration roller clutch Connector Harness clamp Connector Pickup solenoid bracket Screw Bushing ...

Page 155: ...enoid from the bracket Fig 10 41 1 Take off the main motor drive unit P 9 7 C Main motor drive unit 2 Take off the pickup solenoid bracket P 10 22 N Pickup solenoid SOL1 3 Remove 1 E ring and take off the drawer pickup clutch Fig 10 42 4 Take off the cover A cover B spring and flange Fig 10 43 Pickup solenoid Drawer pickup clutch E ring Flange Spring Cover A Cover B Hook ...

Page 156: ... B and the center of the rib of the cover A are aligned Fig 10 44 1 Take off the transfer separation charger P 11 16 L Transfer Separation charger 2 Remove 1 clip and take off 1 gear and the registration roller rubber while sliding them to the front side Fig 10 45 3 Remove 2 washers 1 E ring 1 gear and 1 pin from the registration roller Fig 10 46 Rib Slit Stopper Cover A Cover B Registration rolle...

Page 157: ...hing and then take off the registration roller metal while sliding it to the rear side Fig 10 47 5 Remove 1 bushing 1 E ring and then take off 1 gear and 1 pin Fig 10 48 1 Take off the main motor drive unit P 9 7 C Main motor drive unit 2 Take off the registration roller clutch P 10 21 M Registration roller clutch CLT1 3 Take off the pickup solenoid bracket P 10 22 N Pickup solenoid SOL1 4 Remove ...

Page 158: ... Release the latch take off the bracket while lifting it up and then disconnect the connec tor Fig 10 50 3 Release the latch and take off the drawer detection switch from the bracket Fig 10 51 1 Take off the rear cover P 2 22 J Rear cover 2 Release the harness from the harness clamp and disconnect 1 connector Fig 10 52 Connector Latch Drawer detection switch bracket Drawer detection switch Drawer ...

Page 159: ... lifting it up Release the latch and take off the drawer detection switch bracket Note Be careful not to break the harness which connects the registration guide unit with the drawer detection switch when taking off the unit Fig 10 54 7 Take off the bracket of paper empty sensor P 10 20 K Paper empty sensor S7 8 Release the harness from the harness clamp disconnect the connector remove 3 screws and...

Page 160: ...TUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 28 9 Remove the seal release 2 latches and take off the registration sensor Fig 10 56 Registration sensor Seal ...

Page 161: ...tion This chapter explains about the area around the drum drum itself image processing their parts and control circuits Fig 11 1 Drum thermistor Separation charger Exhaust fan Recovery blade Transfer charger Main charger Discharge LED Cleaning blade Pre Transfer guide Transfer guide roller Ozone filter Drum Toner recovery auger Post Transfer guide ...

Page 162: ... parts Drum cleaning blade PM parts Recovery blade PM parts Drum thermistor THM4 Discharge LED ERS Main charger Needle electrode PM parts Main charger grid PM parts Transfer unit Transfer Separation charger Transfer charger wire PM parts Separation charger wire PM parts Exhaust fan M5 Ozone filter PM parts Transport guide Temperature humidity sensor S3 Switching regulator PS ...

Page 163: ...tage is applied to the needle electrode the air around it is charged ionized The ionized air then flows into the drum causing it to be charged This phenomenon is called corona dis charge At the same time a control bias is applied to the main charger grid to control the charging amount In a dark place negative charge is evenly applied onto the drum surface by the corona discharge and this grid In a...

Page 164: ...e of the equipment The air to exhaust includes the ozone generated by the corona discharge and this ozone is removed by the ozone filter The exhaust fan M5 also helps the paper separation by absorbing the paper to post transfer guide 6 Discharge LED ERS Discharging is a process to decrease or eliminate the electrical potential of the drum surface The electrical resistance of the photosensitive lay...

Page 165: ...current and voltage of each bias according to the 24VCOV OFF input from the low voltage generation circuit of the switching regulator Fig 11 3 Switching regulator Low voltage section High voltage section HVMVR 1 HVDTR 1 HVTVR 1 HVSAV 1 HVTM 0 HVSDWN 0 HVTAC 0 HVCLK 0 HVTT 0 HVTSP 0 HVTGB 0 Flash ROM SoC MAIN board ASIC D A converter Digital data Adjustment value Analog data Reference voltage Vc Tr...

Page 166: ... bias transfer charger and separation charger Each bias output can be linearly changed by switching these reference voltages The output operation of the reference voltage is as follows 1 The adjustment values of the main charger developer transfer and separation bias in the Flash ROM are output to the SoC 2 The reference voltage data are output from the SoC to D A converter 3 Converted to analog d...

Page 167: ...ger bias developer bias transfer bias and separation bias as well as the output of the auto toner sensor and the laser 11 5 2 Circuit configuration The configuration of the drum surface temperature detection circuit is shown below The voltage output from the drum thermistor is converted by the A D converter in the Main board and is input into the SoC The drum thermistor is a device whose resistanc...

Page 168: ...t corrects the output of the main charger bias developer bias transfer bias and separation bias as well as the output of the auto toner sensor and the laser 11 6 2 Circuit configuration The configuration of the temperature humidity detection circuit is shown below The voltage output from the temperature humidity sensor is converted digitally by the A D converter on the MAIN board and is input into...

Page 169: ...1 Open the ADU cover and transfer unit 2 Open the front cover and take off the toner cartridge 3 Disconnect 1 connector Loosen 2 screws and pull out the process unit Note When installing the process unit make sure that the connector harness is not caught under the developer unit Fig 11 6 Fig 11 7 Process unit for MJD Process unit except for MJD 07 03 ...

Page 170: ...e 1 latch Then pull out the process unit front cover and take it off Note When installing the process unit front cover wire the harness correctly in order not to con tact the gears and harness of the process unit front cover each other Fig 11 8 Fig 11 9 Fig 11 10 Process unit front cover Connector Connector Latch for MJD Process unit front cover Connector Connector Latch except for MJD Process uni...

Page 171: ...e careful not to touch or scratch the drum surface at this time 2 Do not deform the guide mylar by touch ing this Fig 11 11 Fig 11 12 1 Take off the drum cleaner unit P 11 10 B Drum cleaner unit 2 Release 1 latch and take off the discharge LED unit Note Be careful not to touch or scratch the drum surface at this time Fig 11 13 Drum cleaner unit Guide mylar Discharge LED unit Latch ...

Page 172: ...Take off the discharge LED unit P 11 11 C Discharge LED ERS 2 Pull out the main charger and take it off by sliding it to the rear side Note Be careful not to touch or scratch the drum surface at this time Fig 11 15 1 Take off the main charger P 11 12 D Main charger 2 Remove the spring and take off the main charger grid Note Do not touch the mesh area of the grid Fig 11 16 Discharge LED Main charge...

Page 173: ...o take it off Fig 11 17 1 Take off the main charger grid and main charger cleaner P 11 12 E Main charger grid P 11 13 F Main charger cleaner 2 Take off the terminal covers of both front and rear sides Fig 11 18 3 Remove the terminal and spring Then take off the needle electrode Notes 1 Do not touch the needle electrode directly with bare hands 2 Make sure not to hold or bend the needle electrode F...

Page 174: ...ke off the drum Notes 1 Be careful not to touch spit or scratch the drum surface 2 Avoid direct light Place the drum in a dark place immediately after taking off 3 Be careful not to touch or scratch the edge of the cleaning blade Fig 11 20 1 Take off the drum P 11 14 H Drum 2 Remove 2 screws and take off the drum cleaning blade Note Be careful not to touch or scratch the edge of the drum cleaning ...

Page 175: ...he drum has been taken off first since the fingers may scratch the drum surface Fig 11 22 3 Take off the drum separation finger with the spring Note When the drum separation fingers have been replaced check if the pressure movement is normal by moving them with your hands Fig 11 23 1 Take off 2 drum separation finger units P 11 15 J Drum separation finger 2 Remove 2 screws and take off the whole r...

Page 176: ...ease the latch and take off the transfer and separation chargers Fig 11 25 1 Take off the transfer separation charger P 11 16 L Transfer Separation charger 2 Release 9 latches and take off the separation supporter Fig 11 26 3 Release 2 latches and take off the terminal cover on the front side 4 Release 2 latches and take off the terminal cover on the rear side Fig 11 27 Transfer Separation charger...

Page 177: ...emove the cushioning material disconnect the terminal and remove the spring Then take off the separation charger wire Notes 1 Insert the wire securely into the V grooves of the front and rear sides 2 Do not twist the wire 3 Do not touch the wire directly with bare hands Fig 11 28 1 Open off the ADU cover 2 Take off 2 guides Fig 11 29 3 Take off the transfer unit while pulling the lever Fig 11 30 S...

Page 178: ...RATION All rights reserved DRUM RELATED SECTION 11 18 4 Remove 1 screw and take off the harness cover Fig 11 31 5 Disconnect 1 connector Fig 11 32 6 Take off the transfer unit while lifting it up Fig 11 33 Screw Harness cover Connector Transfer unit ...

Page 179: ...e off the rear side guide Fig 11 34 3 Remove 1 screw and take off the ozone filter cover 4 Take off the ozone filter Fig 11 35 1 Take off the transfer unit P 11 17 N Transfer unit 2 Take off the transfer separation charger P 11 16 L Transfer Separation charger 3 Remove 1 screw and take off the post trans fer guide Fig 11 36 Guide Ozone filter Ozone filter cover Post transfer guide ...

Page 180: ... SECTION 11 20 4 Remove 4 screws Fig 11 37 5 Remove 1 strap release the harness from the harness clamp and take off the exhaust fan with the duct Fig 11 38 6 Release the harness from the harness clamp remove the two sided tape and take off the exhaust fan Fig 11 39 Duct Exhaust fan Duct ...

Page 181: ...over P 2 19 C Left cover 2 Disconnect 1 connector remove 1 screw and then take off the temperature humidity sensor Fig 11 40 1 Take off the process unit P 11 17 N Transfer unit 2 Take off the inner tray P 2 18 B Inner tray 3 Disconnect 1 connector remove 1 screw and then take off the toner cartridge interface PC board Fig 11 41 Temperature Humidity sensor Connector Toner cartridge interface PC boa...

Page 182: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 22 ...

Page 183: ...e developer material adheres to this drum surface to form images This process is performed in the developer unit This chapter explains about the units parts and control circuits related to development The developer unit in this equipment has a recovered toner supply mechanism which recycles the recovered toner scraped off by the drum cleaning blade The developer unit is driven by the main motor M3...

Page 184: ...oper unit Developer material Periodic replacement required Mixers 1 2 and 3 Developer sleeve Magnet roller Doctor blade Auto toner sensor S6 Drum thermistor THMS4 Recovered toner supply mechanism Toner recycling auger Toner cartridge Toner cartridge PC board CTRG Toner cartridge interface PC board CTIF Toner motor M2 Ch 9 ...

Page 185: ...h the drum surface Auto toner sensor S6 To print out normal images a constant ratio of the carrier and the toner in the developer material toner density must be maintained The auto toner sensor S6 detects the content ratio of the toner in the developer material with its magnetic bridge circuit When this sensor detects the insufficient status of the toner it drives the toner motor M2 to supply the ...

Page 186: ...y empty the behavior of the toner lamp appears when the value of counter for period of toner cartridge rotation time has exceeded the thresholds previ ously written in the toner cartridge PC board CTRG When a used cartridge refilled with new toner is used that is the value of counter for period of toner cartridge rotation time in the toner cartridge PC board CTRG had already exceeded the threshold...

Page 187: ... the value of the toner near empty status threshold setting 08 971 is set at 3 the toner remain ing check function is disabled When the cartridge detecting function is set to OFF 08 695 is set at 0 the value of the toner near empty status threshold setting 08 971 is automatically set at 3 and the toner remaining check func tion is disabled When the cartridge detecting function is set to ON 08 695 ...

Page 188: ...y the developer material using the mixer 3 The mixer 3 is mounted exclusively for the recovered toner to mix it in a sufficient period of time On the other hand the fresh toner transported from the toner cartridge into the developer unit is mixed by the mixer 2 Then the fresh toner and the recovered toner are mixed together and further transported to the mixer 1 They are further mixed by the mixer...

Page 189: ...er motor which a DC motor driven by control signals from the ASIC on the MAIN board sup plies toner to the developer unit by means of rotating the paddle and anger in the toner cartridge The toner motor is driven when the ON OFF signal TNRMTON 0 output from the ASIC becomes L level Fig 12 3 ASIC Toner motor TNRMTON 0 MAIN board 24VCOV OFF F1 ...

Page 190: ...ontrols the toner density so that the toner in the developer material is fixed to certain ratio Toner motor Supplies toner to the developer material Control panel Indicates toner empty information Recovered toner supply section The main motor supplies the recovered toner to the developer unit from the recovered toner sup ply mechanism Fig 12 4 Toner Developer material Auto toner sensor Toner cartr...

Page 191: ...ation Maintains the 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 Toner empty detection and recovery Detects that there is no toner in the toner cartridge The toner motor is driven The auto ...

Page 192: ... high frequency output from the detection winding into a DC signal auto toner output VATS Fig 12 5 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 output increases The auto toner output VATS increases When the toner density is high The ratio of the toner against the carrier in the developer...

Page 193: ...unit before the developer material is replaced 1 Take off the Process unit P 11 9 A Process unit 2 Take off the drum cleaner unit from the pro cess unit so that only the developer unit will be left P 11 10 B Drum cleaner unit Notes 1 Be careful not to touch or scratch the drum surface at this time 2 Do not deform the Guide Mylar by touch ing this Fig 12 6 Fig 12 7 Developer unit Drum cleaner unit ...

Page 194: ... the arrow and take it off Fig 12 8 Note When installing the developer unit upper cover make sure that the side seal comes between the developer unit upper cover and rubber seal on the cover Fig 12 9 3 Remove the developer material from rear side Note When removing the developer material be careful not to drop the developer material on the gears of the developer unit Fig 12 10 Developer unit upper...

Page 195: ...irection of the arrow while filling the developer unit with the developer material Spread out the developer material over the developer sleeve Attach the nozzle as required Fig 12 11 1 Remove the developer material P 12 12 B Developer material 2 Place the developer unit upside down Disconnect 1 connector release 1 latch and then rotate the auto toner sensor counter clockwise to take it off Fig 12 ...

Page 196: ...isconnect 1 connector remove 1 screw and take off the drum thermistor Fig 12 13 1 Remove the developer material P 12 12 B Developer material 2 Remove 2 screws and take off the recovered toner supply unit Fig 12 14 3 Remove 1 screw Disconnect 1 connector while taking off the recovered toner drive unit Remove 1 gear Fig 12 15 Drum thermistor Connector Recovered toner supply unit Gear Recovered toner...

Page 197: ... sleeve are removed be sure to adjust the doctor sleeve gap 0 45 0 05 mm after assembling Refer to Service Handbook Chap 3 8 Fig 12 17 6 Remove 1 screw and take off the polarity adjustment lever Note Make a note of the position where the polar ity adjustment lever is pointing Mark the position if needed When reassembling match the polarity adjustment lever with the previously marked position on th...

Page 198: ...eserved DEVELOPMENT SYSTEM 12 16 7 Disconnect 2 connectors remove 3 screws and take off the bracket Fig 12 19 8 Remove 1 E ring and take off the guide roller on the front side Fig 12 20 9 Remove 1 screw and the gear Fig 12 21 Connector Bracket Guide roller E ring Gear ...

Page 199: ...T SYSTEM 12 17 10 Remove 3 screws Take off 1 bearing and the bracket Fig 12 22 11 Take off 4 gears and 1 timing belt Fig 12 23 12 Remove 1 E ring 1 pin and 1 pulley 13 Take off the guide roller on the rear side Fig 12 24 Bearing Bracket Timing belt Gear Gear Pulley Guide roller E ring Pin ...

Page 200: ...12 18 G Mixer 14 Remove the seal on the front side Remove 1 E ring and 1 bushing Fig 12 25 15 Take off the developer sleeve Fig 12 26 1 Take off the developer sleeve P 12 14 F Guide roller Developer sleeve 2 Take off the doctor sleeve Fig 12 27 Seal Bushing E ring Developer sleeve Doctor sleeve ...

Page 201: ...1 screw and take off the tensioner bracket 4 Remove 2 screws and take off the holder Fig 12 28 5 Remove 2 bushings and 2 oil seals from the holder Replacement of Oil seal P 12 21 H Replacement of Oil Seal Fig 12 29 6 Take off the mixers 2 and 3 Fig 12 30 Holder Tensioner bracket Oil seal Bushing Mixer 3 Mixer 2 ...

Page 202: ...seals on the rear side Replacement of Oil seal P 12 21 H Replacement of Oil Seal Fig 12 31 8 Remove the end section of the mixer 1 9 Remove the bushing and oil seal Replacement of Oil seal P 12 21 H Replacement of Oil Seal Fig 12 32 10 Take off the mixer 1 Fig 12 33 Oil seal Bushing Oil seal Bushing End section of mixer 1 Mixer 1 ...

Page 203: ...of Oil seal P 12 21 H Replacement of Oil Seal Fig 12 34 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 amount of 2 rice grains on entire surface of the oil seal evenly Note Wipe off the excessive grease Fig 12 35 Oil seal Bushing Outside Inside Oil seal Gr...

Page 204: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 22 ...

Page 205: ... transferred image on the trans ported paper The paper is then transported to the exit tray after the completion of fusing The fuser exit unit is driven by the main motor to rotate the fuser roller and the exit roller Other than the above rollers the fuser exit unit consists of the heater lamps separation fingers ther mistors THMS1 THMS2 THMS3 fuser thermostat THMO1 paper transport guide and the e...

Page 206: ... roller unit Pressure roller PFA tube sponge roller 25 Periodic replacement part Exit sensor S5 Fuser roller unit Fuser roller Fluoro plastic coated roller 30 Periodic replacement part Heater lamp LAMP1 LAMP2 564W 564W Thermistor THM1 2 3 Fuser thermostat THMO1 Non contact type 170ºC Separation finger Periodic replacement part Exit roller ...

Page 207: ... thermistor THMS1 Side thermistor THMS2 This thermistor detects the temperature of the fuser roller to maintain it in a certain temperature range actually around 170 C between the lower limit causing the poor fusing and the upper limit causing the high temperature offsetting When the temperature of the fuser roller is lower than the preset temperature it turns ON the power supply to the heater lam...

Page 208: ...o the fuser unit is held between the fuser roller and pressure roller and toner is fused on the paper with heat and pressure After this the separation fingers separate the paper from the fuser roller Then the paper is transported to the inner tray through the exit roller The paper transport status of the fuser exit unit is detected by the exit sensor When the power is turned ON the warming up of t...

Page 209: ...se that the surface temperature of the fuser roller has exceeded the specified temperature the SoC turns the heater lamp OFF If the SoC does not function for some reason and the fuser roller is abnormally overheated as the result a forcible power OFF circuit transmits a relay OFF signal to the switching regulator to shut off the power supply to the heater lamp by opening the relay In addition if t...

Page 210: ...d ON OFF alternately to maintain the surface temperature of the fuser roller at a certain level setting tem perature of each status 3 Temperature control for the both ends of the fuser roller During continuous printing the temperature of the end of the fuser roller area where the paper does not pass on generally tends to be higher than that of other areas areas where the paper passes on For this r...

Page 211: ... to Auto Power Save Mode to turn OFF the heater lamp When a value other than OFF is set for the Fuser roller temperature in Auto Power Save Mode code 08 409 448 the equipment controls to maintain the fuser roller temperature at the preset value by turning the 2 heater lamps ON OFF alternately Auto Shut Off Mode 08 206 When no operation is performed in a specified period of time default 15 min afte...

Page 212: ...he thermistor thermostat and heater lamp Reset the counter to 0 after repair ing them then turn ON the power If the fuser unit error status counter is 20 or over e g 31 the data in SRAM or SRAM itself may possibly have been ruined due to causes such as leakage from the chargers Check the bias high voltage transformers and charge wires to see if any of them is defective and also look through all th...

Page 213: ...tremely low and keeps turning the heater lamp 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 SoC works to detect whether each thermistor is broken or not Also the thermistors constantly check the temperature of heater lamp to prevent it from excessive heating by MAIN circuit abnormality or therm...

Page 214: ...al C44 230 C or above 230 C or above Detecting 40 C 1 40 C or below Specified time C41 40 C or below Detecting 100 C 1 100 C or below Specified time C44 100 C or below 2 40 C or below 150 C or above On usual C43 150 C or above 40 C or below Detecting warm ing up tempera ture 1 Warming up temp or below Specified time C44 Warming up temp or below 2 40 C or below 150 C or above On usual C43 150 C or ...

Page 215: ...ws and then take off the fuser paper exit unit Note Be careful because the fuser paper exit unit is hot Fig 13 6 1 Take off the fuser paper exit unit P 13 11 A Fuser Paper exit unit 2 Remove 1 spring and 2 screws 3 Separate the pressure roller unit from the fuser roller unit Fig 13 7 Note Separate the pressure roller and the heat roller while pressing the thermistor ground leaf spring Fig 13 8 Con...

Page 216: ... reserved FUSER EXIT UNIT 13 12 C Exit roller 1 Take off the fuser roller unit P 13 11 B Pressure roller unit Fuser roller unit 2 Release the latch and take off the gear A Fig 13 9 3 Take off the gear B Fig 13 10 4 Remove the bracket Fig 13 11 Gear A Gear B Bracket ...

Page 217: ...ing it to the rear side Fig 13 12 1 Take off the fuser paper exit unit P 13 11 A Fuser Paper exit unit 2 Release the stopper using a flathead screw driver Fig 13 13 3 Open the guide and slide it to the front side Then slide its rear hinge downward Note Keep the guide being slid to the front side during the steps 3 and 4 Fig 13 14 Exit roller Clip Bushing Stopper Stopper Guide 1 2 ...

Page 218: ...f the guide by sliding its rear hinge to the right side Fig 13 15 5 Remove 1 spring and take off the guide while the guide is being slid to the rear side Fig 13 16 Note When installing the guide secure the spring to the hook of the fuser unit and the other end of the spring to the guide Fig 13 17 1 2 Guide Spring Spring Hook Guide ...

Page 219: ...move the Mylar 7 Disconnect 1 connector release 2 latches and then take off the exit sensor Fig 13 18 1 Take off the fuser roller unit P 13 11 B Pressure roller unit Fuser roller unit 2 Remove 5 springs Fig 13 19 3 Take off 5 separation fingers Fig 13 20 Exit sensor Connector Mylar Fuser roller unit Spring Separation finger ...

Page 220: ... not to mix up the upper heater lamp and the lower heater lamp The upper heater lamp has a coil wound up on its center part and the lower heater lamp has coils wound up on its both edges When installing the heater lamps be sure to face up their weld sides Do not touch the lamps directly with your hands The connector on each end of the har ness which connects to the center heater lamp has a small s...

Page 221: ...ch bushing on both edges of the roller out ward so that the bushings will engage with the frame and the installation will be secured Do not apply force onto the roller because it may be deformed Fig 13 24 4 Remove 1 C ring and 1 bushing on the front side of the fuser roller 5 Remove 1 C ring 1 gear and 1 bushing on the rear side of the fuser roller Fig 13 25 1 Take off the pressure roller unit P 1...

Page 222: ...ear sides Fig 13 28 5 Take off 2 bushings and then take off the pressure roller while sliding the pressure roller to the rear side Notes Do not drop the pressure roller when you lift it up because it is quite heavy Be sure to install the pressure roller from the rear side pressure roller ground plate side in order not to deform the pressure roller ground plate Fig 13 29 Spring Pressure lever Press...

Page 223: ...tors and then take off each thermistor by releas ing its harness out of the harness clamp Fig 13 30 Note When installing the thermistors do not mix up the installation positions of the side ther mistor and the edge thermistor by telling them apart by the length of their harnesses Fig 13 31 1 Take off the fuser roller P 13 17 G Fuser roller 2 Remove 2 screws and take off the fuser ther mostat Fig 1...

Page 224: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 20 ...

Page 225: ...ch line Power supply used in the entire equipment during the image forming process It is supplied via the cover switch This voltage 24VCOV OFF is output only when both the main switch of the equipment and the cover interlock switches are turned ON when the front and ADU covers are closed When the equipment is in Energy Saving Mode Auto Shut Off Mode only the 5VB for the main switch line is supplie...

Page 226: ...e stops earlier than the 24V line does it may cause damage to the electron device on each control circuit To prevent this the supply of the 5VB voltage stops after the power OFF signal is output and the minimum retaining time 50 ms or more has elapsed 3 Output protection Each output system includes an overcurrent and overvoltage protection circuit a fuse and internal protection circuit This is to ...

Page 227: ... 5V CN104 Pin 1 Output to the MAIN board 5VB CN104 Pin 6 Output to the FUS board 5VB CN104 Pins 7 and 8 Output to the MAIN board 2 24V 24V CN104 Pins 15 and 16 Output to the MAIN board 24VDF CN104 Pins 17 and 18 Output to the ADF via MAIN board The following is an output channel for the cover switch line 1 24V 24VCOV OFF CN104 Pins 21 and 22 Output to the MAIN board PFU via MAIN board ...

Page 228: ...h part using the following table Voltage Board Unit Part Fuse type 24V MAIN board Scan motor M1 F203 4A Polygonal motor M4 Switching regulator cooling fan M6 Registration clutch CLT1 Pickup solenoid SOL1 Bypass pickup solenoid SOL2 Contact image sensor unit CIS PFU 24VDF ADF 24VCOV OFF MAIN board Toner motor M2 F201 4A Main motor M3 Exhaust fan M5 Auto toner sensor S6 Discharge LED ERS Coin contro...

Page 229: ... heater lamp control circuit TRC2 High voltage output circuit OUT1 Needle electrode bias OUT2 Grid bias OUT3 Developer bias OUT4 Transfer bias OUT5 Separation bias OUT6 Transfer guide bias Center heater lamp control circuit TRC1 Main switch ADU cover opening closing interlock switch Front cover opening closing interlock switch Fuser thermostat Live Neutral Switching regulator CN102 CN103 CN106 CN1...

Page 230: ...r lower 200 ms or lower 200 ms or lower OPEN ON OFF CLOSE 10 ms or higher 0 ms or higher 0 ms or higher 20 ms or higher 20 ms or higher 50 ms or higher 0 to 200 ms 50 to 120 ms 0 to 200 ms 0 to 200 ms 5VB PWRDWN 1 PWRSV 1A 5V 24VCOV OFF 24V 24VDF Cover opening closing interlock switch Linked with cover switch Linked with main switch Linked with main switch Linked with main switch ...

Page 231: ...N DH AC L SCN DH AC N CST DH AC L CST DH Not used Not used AC LAMP IN L AC LAMP1 IN N AC LAMP2 IN N AC L DRM DH AC N PFU DH AC L PFU DH THERMO DRM DH THERMO FSR Fuser unit PS ACC Inlet AC IN 1 J562 1 2 2 1 2 AC SW OUT L AC SW OUT N AC MAIN N AC MAIN L DC DRM DH TRC1 TRC2 2 4 1 3 6 5 4 1 4 2 2 3 1 2 3 2 1 3 2 1 1 1 1 AC SW IN L AC SW IN N 3 1 1 3 4 1 2 CN433 3 2 1 1 4 5 6 3 2 1 2 3 1 C B A CNTR LAM...

Page 232: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 14 8 ...

Page 233: ...15 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 PC BOARDS 15 1 15 PC BOARDS 1 PWA F MAIN Fig 15 1 2 PWA F SRAM Fig 15 2 ...

Page 234: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 15 2 3 PWA F LDR Fig 15 3 4 PWA F SNS Fig 15 4 5 PWA F LPNL Fig 15 5 ...

Page 235: ...15 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO166 206 PC BOARDS 15 3 6 PWA F FUS Fig 15 6 ...

Page 236: ...e STUDIO166 206 February 2007 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 15 4 ...

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