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SERVICE MANUAL

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3. Fig 2 30 Connect the connectors to the correct faston terminals on the switching regulator board Connector F Red E Blue D White C White B White A White 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 e STUDIO167 207 237 OUTLINE OF THE MACHINE Harness Black thick White thick Black thin Red thin Red thick White thick Switching regulator unit Fig 2 32 February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 26 4 Disconnect 7 connectors 5 Remove 1 screw and 1 ground wire Note Make sure that the position is correct when inserting the connector 6 Remove 8 screws release 1 locking support and take off the switching regulator board February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 27 Fig 2 33 Green Yellow Black White witching regulator board Fig 2 35 e STUDIO167 207 237 OUTLINE OF THE MACHINE F Switching regulator cooling fan M6 1 Take off the left cover P 2 19 C Left cover Sw
4. e STUDIO167 Bypass feed PFP Paper size Drawer Size speci Size not PFU Upper Lower fied specified drawer drawer B5 LT 16 16 11 16 16 16 A5 R ST R 16 11 16 16 A4 R B5 R LT R 15 5 15 5 11 15 5 15 5 15 5 B4 LG FOLIO 13 13 11 13 13 13 COMPUTER A3 LD 11 11 11 11 11 11 e STUDIO207 Bypass feed PFP Paper size Drawer Size speci Size not PFU Upper Lower fied specified drawer drawer B5 LT 20 20 20 20 20 20 A5 R ST R 20 20 20 A4 R B5 R LT R 15 5 15 5 15 5 15 5 15 5 15 5 B4 LG FOLIO 13 13 13 13 13 13 COMPUTER A3 LD 11 11 11 11 11 11 e STUDIO237 Bypass feed PFP Paper size Drawer Size speci Size not PFU Upper Lower fied specified drawer drawer B5 LT 23 23 23 23 23 23 A5 R ST R 23 23 23 A4 R B5 R LT R 17 5 17 5 17 5 17 5 17 5 17 5 B4 LG FOLIO 15 15 15 15 15 15 COMPUTER A3 LD 12 5 12 5 12 5 12 5 12 5 12 5 gt means Not acceptable February 2007 TOSHIBA TEC CORPORATION All rights reserved The copy speed in the above table are available when originals are manually placed for single side multiple copying e STUDIO167 207 237 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES When the ADF and are used the copy speed of 16 20 23 sheets per minute is only available under the following conditions Original Mode Single side original A4 LT size APS automatic density are not selecte
5. 15 1 15 1 Gonstr ctlOn 15 1 15 2 Operation of DC Output CIreult i 15 2 15 3 Output Channel ete rite Ee te FR ERE RH EXNXEREENNNREREREPSRRYR ERRAT dueaaanechcadaacedmensayseneeceas 15 3 S dic 15 4 15 5 Configuration of Power Supply 15 5 15 6 Power Supply SEQUENCE E 15 6 1527 AGC Wire FIaress sacos dte e reus ires tures vu Re RENT Ree 15 7 16 BOARDS 16 1 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 CONTENTS e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved CONTENTS 1 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 4 Specifications Copy process Type Original table Accepted originals Indirect electrophotographic process dry Desktop type Fixed type the left rear corner used as guide to place originals Sheet book and 3 dimensional object The automatic document feeder ADF and reversing automatic document feeder RADF only accepts paper which are not pasted or stapled Single sided originals 50 to 127 g m 13 to 34 Ib Bond Carbon paper are not acceptable either Maximum size A3 LD Copy speed Copies min
6. 6 8 6 5 1 Exposure LED control 6 8 6 52 CCD Ga lace ayes 6 9 6 6 Automatic Original Size Detection 6 12 6 6 1 Principle of original size detection 6 12 6 6 2 Process of detection of original size 6 13 6 7 Disassembly and 6 17 IMAGE PROCESSING XR RE RR Ra RR NER erige xe aye 7 1 71 1 General 1 RR 7 1 Pe Pe bed 7 2 53 MAIN Board t 7 3 IM TT UIIMLP 7 3 7 3 2 Functions of image processing circuit 7 4 8 LASER OPTICAL UNIT cccceccscces ccvscccccssieccticetvccevesccencecesscccerecensvesiviccadeccdensdivecetavevicavecses 8 1 8 1 General 8 eene Im ener nenne nennen 8 1 8 2 5 8 2 8 3 Laser Diode Control Circuit nennen eee 8 5 8 4 Polygonal Motor Control 8 6 8 5 Disassembly and 8
7. Fig 2 55 B 2 When PFP is installed 1 Take off the rear cover P 2 22 J Rear cover 2 Remove 1 ground wire and 2 connectors 3 Take off the equipment from the PFU P 2 31 B 1 When PFP is not installed 4 Take off the PFP drawer Fig 2 57 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 35 5 Remove 1 screw and take off 1 fixing bracket on the front left side 6 Remove 1 screw and take off 1 fixing bracket on the front right side 7 Remove 1 screw and take off 1 fixing bracket on the rear left side e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 36 Fig 2 58 Fig 2 59 Fig 2 60 February 2007 TOSHIBA TEC CORPORATION All rights reserved 8 Remove 1 screw and take off 1 fixing bracket on the rear right side Fig 2 61 9 Take off the PFU while lifting it up Fig 2 62 C KD 1022 Paper Feed Pedestal PFP 1 Take off the equipment and the PFU Then take off the PFP P 2 35 B 2 When PFP is installed Fig 2 63 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 37 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MA
8. 0L0 GIN yun 079 0811 09 dweq 0701 6106 2106 9 3avu 4 Jepee 4 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES e STUDIO167 207 237 2 OUTLINE OF THE MACHINE 2 1 Sectional View 1 Front side A2 A3 4 1 5 2 TIUS A K2 15 I9 F3 F2F1 E J6 J7 J5J4 J8 H2 H3 T Tay A6 5 K3 B2 Bi F4 18 14 111110 13 16 C3 1 2 4 E4 Fig 2 1 A1 Original glass A2 ADF original glass A3 Contact image sensor unit CIS 4 Scanner damp heater Left side DH1 A5 Scanner damp heater Right side DH2 Scanner damp heater thermostat 2 A7 Automatic original detection sensor S9 813 B1 Laser optical unit B2 Polygonal motor M4 C1 Pickup roller C2 Separation claw C3 Paper empty sensor S7 C4 Registration sensor 54 C5 Registration roller E1 Bypass pickup rolle
9. Drum Mixer Bypass feed roller Bypass pickup roller Main motor Pickup roller PFU drive gear Fig 9 1 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DRIVE UNIT 9 2 Configuration Unit to be driven Drive transmission Main motor Drum Gears Developer unit Mixer Gears Cleaner unit Toner recovery auger Timing belt gears Fuser unit Fuser roller Timing belt gears Rollers Pickup roller Bypass feed roller Timing belt gears Bypass pickup roller and PFU Toner motor M2 Toner cartridge Gears e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRIVE UNIT 9 3 Functions 1 Main motor M3 The main motor is a brushless motor which is controlled by control signals 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRIVE UNIT 9 4 Main Motor Control Circuit The main motor which is a DC motor driven by control signals from the MAIN board drives the drum devel
10. 2 18 2 6 Disassembly and Replacement of PC boards sssssssseeeeenene 2 23 2 7 Removal and Installation of 2 29 3e COPY PROCESS 3 1 3 1 General Description of Copying 3 1 3 2 Details of Copying 3 2 3 3 Comparison with 5 1 0230 280 3 13 4 GENERAL OPERATION ioa eeu nia eonun dadaanan e Genuine ea ene niani aono 4 1 41 Overview of Operation tectae etes 4 1 4 2 Description of 000000 00 nennen 4 2 4 21 EUR tu ce DV Cu Peu PR 4 2 4 2 2 Ready state ready for 4 2 4 2 3 Drawer feed copying occidere EIS Aa Eon 4 3 4 2 4 Bypass feed copying 4 4 4 25 Interruption 4 4 4 3 Detection of 4 5 431 Types 4 5 4 3 2 Description of
11. 140 24 000 100 5 900 pages 80 Type of originals THE CULTURE OF JAPAN TAKEGAKI e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 6 Transfer Transfer is the process of transferring the toner image visible image formed on the drum surface onto paper 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 The toner moves from the drum surface onto the paper Paper Drum Transfer charger Fig 3 15 For smooth transfer In the transfer bias processing of this equipment bias voltage 565 VDC is applied to the regis tration roller and transfer unit transport guide to prevent the charge produced by the transfer charger from flowing into the transfer unit transport guide through the paper Output is controlled as follows to realizes the desirable transfability Paper position against transfer point Transfer output From leading edge to 11 mm from leading edge 340 ADC From 11 mm from leading edge to 5 mm from trailing edge 369 ADC From 5 mm from trailing edge to trailing edge L 282 ADC A Direction of transportation XO X 9 QX KECK HEX Drum rotation ox 36 Transfer c
12. February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 7 4 Temperature control at Energy Saving Mode This equipment has the following two types of temperature control for saving energy and returns to ready status to perform printing in each mode upon printing request The period of time from the printing request to this mode can be set in Setting Mode 08 Auto Power Save Mode 08 205 When the printing is not performed in a specified period of time default 15 min after the previous printing is completed the equipment enters 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 after the equipment entered to Auto Power Save Mode the equipment then enters Auto Shut Off Mode to be in the OFF state e g turns off the unnecessary displays on the control panel etc Auto Power Save Mode Warming up Ready During printing Fixed time 08 205 Heater lamp OFF Auto ten ce Shut Off Fixed time 08 206 Mode rt at 170 OFF Temperature of fuser roller He
13. RAB RAS 10 11 VHC244MTCX RAL2RAL3 PWB F PFC 668Q cw243 6LH27205000 Fig 16 7 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PC BOARDS 16 3 8 PWA F ADU TOSHIBA PWB F DU 6427 6LE62612000 C6 JH C4 sLAT7070MPR z J13 ED 5E HALOGEN FREE PWB LEAD FREE PCBA e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 16 4 TOSHIBA TOSHIBA TEC CORPORATION 2 17 2 HIGASHIGOTANDA SHINAGAWA KU TOKYO 141 8664 JAPAN
14. Fans return to the ready rotation READY is displayed and the equipment enters the ready state Timing chart for copying one A4 size sheet fed from the drawer Unit ms Main motor Jo 9400 Registration sensor 2354 4829 Registration clutch 2594 5009 MVDEN signal 2801 5103 Exit sensor 4615 6921 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 GENERAL OPERATION 4 2 4 Bypass feed copying 1 Insert a sheet of paper into the bypass tray Bypass paper sensor Bypass feed priority state 2 Press the START button READY COPYING CIS LED ON Scan motor ON CIS unit move forward Polygonal motor rotates in high speed Main motor and exit motor ON The drum fuser unit developer unit and exit roller are driven 3 Bypass feeding Main charger developer bias and discharge LED ON Fans are rotated in high speed Bypass pickup solenoid ON The bypass pickup roller start to rotate The bypass 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
15. Toner Bypass feeding 100 sheets Carrier Drawer feeding 250 sheets PFU 250 sheets Separation Separates paper with the toner image from the photoconductive drum V Fusing Fuses the toner image onto the paper by applying heat and pressure V Cleaning Scrapes off the residual toner from the drum V Discharging Eliminates the residual nega tive charge from the surface of the photo conductive drum e STUDIO167 207 237 COPY PROCESS 3 2 Details of Copying Process 1 Photoconductive drum The photoconductive drum consists of two layers The outer layer is a photoconductive layer made of an organic photoconductive carrier OPC and the inner layer is an aluminum conductive base in a cylindrical form The photoconductor has the following property when it is exposed to light the elec trical resistance it possesses increases or decreases according to the strength of the light Example Strong light Resistance is decreased works as a conductor Weak light Resistance is increased works as an insulator ne Photoconductive layer Base Structure of the photoconductive drum Example of OPC 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 whit
16. 4 6 4 4 Flow Chat TES 4 11 4 4 1 Immediately after the power is turned 4 11 4 4 2 Automatic paper feed 4 13 5 CONTROL RYE NEN EY A aeg 5 1 5 1 General Description 5 1 5 2 Items Shown on the Display 5 2 Drel DISDAIN MEET 5 2 5 2 2 E 5 3 5 3 Relation between Equipment State and 5 4 SE MEO 5 5 5 41 Blockediagratm cioe 5 5 5 4 2 LED display de x pe Eu dos 5 6 5 5 Disassembly and 5 7 6 SCANNER 6 1 6 1 Ree an aora 6 1 6 2 CONMSUMUCHOM cern tease 6 2 0 3 TRU 6 3 0 4 Description of Operation cene 6 5 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 CONTENTS 641 Scanning operation iiic crease crue eaae S EE 6 5 6 4 2 Scan motor drive nennen 6 6 6 5 Contact Image Sensor Unit Control
17. 5 Bypass pickup roller Draws out a sheet of paper from the bypass tray and transports it to the bypass feed roller The roller goes down and starts rotating when the drive is transmitted 6 Bypass feed roller 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 lt Bypass sensor S8 Detects whether paper is set in the bypass tray or not When paper is set in the bypass tray bypass feeding is performed in preference to drawer feeding And it also detects whether paper has been transported from the bypass tray or not i e whether the leading trailing edge of the paper has passed the bypass feed roller or not The sensor is also used to detect jams such as paper mis sending in the bypass unit 9 Bypass pickup solenoid SOL2 Starts transmission of the drive to the bypass pickup clutch and bypass feed clutch The driving force is not transmitted to the bypass pickup clutch and bypass feed clutch when the bypass pickup solenoid SOL2 is turned OFF and is transmitted to move down the pickup roller and rotate the bypass pickup roller and bypass feed roller when it is turned ON 10 Bypass pickup clutch This is a spring type m
18. Let the spring force produce tension Fig 9 11 for the belt and tighten the fixing screw February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DRIVE UNIT e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRIVE UNIT 9 10 10 PAPER FEEDING SYSTEM 101 General Description The purpose of this system is to pick up a sheet of paper from the 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 Registration roller Pickup roller Paper empty sensor too Bypass feed roller LL FU 1 Bypass pickup roller 6 2 Separation claw Bypass paper sensor Bypass separation pad Registration sensor Fig 10 1 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 1 10 2 Configuration Paper feeding system Drawer Pickup roller Periodic replacement part Pickup solenoid SOL 1 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
19. M8 ADU MOT Driving the automatic duplexing unit Fig 2 9 MD 0103 ADU motor Option 1 23 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 11 2 Sensors and switches Symbol Name Function Remarks 51 HOME SNR Detecting CIS home position Fig 2 3 10 106 CIS home position sensor S2 PLTN SNR Detecting the opening closing of platen Fig 2 3 9 101 Platen sensor cover or RADF S3 TEMP HUMI SNR Detecting the temperature and humidity Fig 2 4 5 16 Temperature humidity sensor inside the equipment S4 RGST SNR Detecting the transporting paper atthe Fig 2 7 15 107 Registration sensor registration roller section S5 EXIT SNR Detecting the transporting paper at the Fig 2 5 24 8 Exit sensor exit section S6 ATTNR SNR Detecting the density of toner in the Fig 2 6 21 46 Auto toner sensor developer unit S7 EMP SNR Detecting presence absence of paper Fig 2 8 15 107 Paper empty sensor in the drawer S8 SFB SNR Detecting presence absence of paper Fig 2 9 13 101 Bypass paper sensor on the bypass tray 59 13 APS 1 3 APS C APS R Detecting original size Fig 2 3 9 9 Automatic original detection sensor 59 only for A4 series models 9 19 SW1 MAIN SW Turning ON OFF of the equipment Fig 2 4 5 4 Main switch SW2 ADU COV INTLCK SW Controlling cutoff and supply ofthe 24V Fig 2 4 6 8 ADU
20. Separation charger Transfer charger Transfer guide roller I Pre Transfer guide Ozone filter Fig 11 1 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 1 11 2 Configuration Drum cleaner unit Drum PM parts Drum separation finger PM 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 2 11 3 Functions 1 Drum The drum is made of a cylindrical aluminum base coated with thin film of organic photoconductive substance The photoconductive object becomes insulative the electrical resistance is high when it is not exposed to the light and electrically conductive the electrical resistance is low when it is exposed to the light This object is called a photoconductor I Main charger The main charger in this equipment consists of a metal rod with U shaped section insulated blocks at both ends of the
21. The tray up motor is turned ON the tray is raised gt The tray up sensor is turned ON gt The tray up motor is stopped When the paper empty sensor is turned OFF even if the tray up sensor is ON during copying The sensor is detecting that paper exists The lamp the control panel corresponding to the drawer blinks When the drawer is selected v Copying is stopped B Pick up failure in bypass During bypass feeding Bypass pickup solenoid ON Registration sensor is not turned ON in a fixed period of time Misfeed in bypass is displayed E12 Copying operation is disabled Solution The bypass paper sensor is turned OFF by removing the paper from the bypass tray February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 GENERAL OPERATION C Misfeed in equipment Exit sensor detects jamming of the leading edge of paper Registration clutch ON ON Lessthan 1 808 sec Registration clutch Exit sensor ON Exi i ON If the exit sensor is not turned ON after 1 808 sec Timer 0 1 808sec Paper E01 gt copying operation is stopped Paper jam E01 Fig 4 1 Exit sensor detects jamming of the tailing edge of paper Registration clutch OFF Registration clutch OFF Lessthan 1 759 sec Exit sensor OFF If the exit sensor is not turned OFF after 1 759 sec
22. Toner cartridge 1 pc Warranty sheet 1 pc for NAD and CND Setup report 1 set for NAD MJD and CND Customer satisfaction card 1 pc for MJD Packing list 1 pc for CND Customer survey sheet 1 pc for CND Certificate of conformance 1 pc for CND Machine version NAD North America ASD Hong Kong Latin America AUD Australia MJD Europe ASU Asia Saudi Arabia SAD Saudi Arabia ARD Latin America CND China TWD Taiwan KRD Korea JPD Japan February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 5 07 03 1 3 Options Platen Cover KA 1640PC C Automatic Document Feeder ADF MR 2017 C Reversing Automatic Document Feeder MR 3019 C Paper Feed Unit PFU MY 1027 C Paper Feed Pedestal PFP KD 1022 C Paper Feed Controller PFC GH 1060 C Drawer Module MY 1028 C Automatic Duplexing Unit ADU MD 0103 C Fax Kit GD 1220NA EU AU TW CN KR External Keyboard GJ 1040 C EU KR TW Network Printer Kit GA 1190 C KR TW Scanner Upgrade Kit GA 1200 C KR TW Operator s manual pocket KK 1660 C Damp Heater MF 1640U E Harness Kit GQ 1130 Desk MH 1640 Notes When the paper feed pedestal KD 1022 or automatic duplexing unit MD 0103 is installed the paper feed controller GH 1060 is also
23. temperature 20 C Multiple copying Up to 999 copies Key in set numbers e Reproduction ratio Actual ratio 100 0 5 Zooming 25 to 20096 in increments of 1 e Resolution Gradation Scanning 600 dpi x 600 dpi Printing Equivalent to 2400 dpi x 600 dpi Gradation 256 steps Eliminated portion Leading edges 3 0 2 0 mm Side trailing edges 2 0 2 0 mm Leading trailing edges 5 0 2 0 mm Side edges 5 0 2 0 mm print e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION rights reserved SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES e Paper feeding Standard drawer 1 drawer stack height 28 mm equivalent to 250 sheets 64 to 80 g m 17 to 22 Ib Bond 2 Bypass feeding Stack height 11 8 mm equivalent to 100 sheets 64 to 80 g m 17 to 22 Ib Bond Paper Feed Unit PFU Option One drawer stack height 28 mm equivalent to 250 sheets 64 to 80 g m 17 to 22 Ib Bond Paper Feed Pedestal PFP Option One drawer or two stack height 60 5 mm equivalent to 550 sheets 64 to 80 g m 17 to 22 Ib Bond Capacity of originals in the ADF RADF Option LM EE A3 to A5 R LD to ST R 100 sheets 80 g m Stack height 16 mm or less Automatic duplexing unit ADU Option repo HaT CN MORTE Stackless Switchback type e Toner supply Automatic toner density detection supply
24. 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 to determine the near empty status of the toner at this moment the sign of the near empty status appears immediately after the installation of this car tridge When a non recommended toner cartridge is used the toner lamp is lit by the cartridge detecting function because its data cannot be read out The toner near empty status threshold setting 08 971 is provided to adjust the timing for displaying the toner near empty status as follows e STUDIO167 207 237 DEVELOPMENT SYSTEM February 2007 TOSHIBA TEC CORPORATION All rights reserved 12 4 The toner near empty status threshold setting 08 971 0 The period from the appearance of the toner near empty sign to the actual complete consumption of the toner is set long 1 Normal Default 2 The period from the appearance of the toner near empty sign to the actual complete consumption of the toner is set short 3 The sign of the status that the cartridge is nearly empty does not appear Note that the shorter the period described above is set the more frequently the toner in the cartridge may run out before the sign of the near empty status of the toner appears because the way the toner remains in the cartridge differs every time When the value of the toner near empty status thresh
25. Connector Fig 12 13 F Guide roller Developer sleeve 1 Remove the developer material P 12 12 B Developer material 2 Remove 2 screws and take off the recovered toner supply unit Recovered toner supply unit 3 Remove 1 screw Disconnect 1 connector while taking off the recovered toner drive unit Remove 1 gear Connector Recovered toner drive unit Fig 12 15 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 14 4 Remove 2 plate springs fixing the doctor sleeve on its both ends 5 Remove 2 screws on both ends of the doctor sleeve and remove 2 coil springs Note When the screws on both ends of the doctor 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 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 the scale February 2007 TOSHIBA TEC CORPORATION All rights reserved Plate spring Plate spring Fig 12 16 Fig 12 17 Polarity adjustment lever Fig 12 18 e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 15 7 Disconnec
26. Copying operation in progress is temporarily stopped CIS unit return to appropriate positions Job interrupted is displayed Automatic density and reproduction ratio 100 are set The set number remains the same 2 Select the desired copy condition 3 After the interruption copying is finished LED INTERRUPT OFF by pressing the INTERRUPT button READY to resume job is displayed 4 Press the START button The copying operation before the interruption is resumed e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 4 3 Detection of Abnormality When something abnormal has occurred in the equipment the symbols corresponding 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 service February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 GENERAL OPERATION 4 3 2 Description of abnormality A Add paper In cases of the equipment drawer or the PFU PFP drawer When drawer is not installed Drawer empty sensor detects the presence or absence of paper No drawe
27. Optoelectronic conversion As in the same manner as the minification optical systems in other equipments the CCD of the contact image sensor CIS unit in this equipment performs photoelectronic conversion and charge transfer by the combination of its shift registers and photodiodes light receiving sensors to output signals for a pri mary scanning direction Pixels of 24 0 um primary scanning direction x 40 0 secondary scanning direction which can be scanned by 1 light receiving sensor are arranged at 42 3 um intervals in this 1 1 magnification optical system CIS In the CCD 1 chip consists of 644 pixels and 1 channel consists of 3 chips only the chan nel 4 consists of 2 chips and 1 line of a primary scanning direction consists 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 registers are driven at the same timing The charge transferred into each chip is then combined into each channel and then output in a time division system Furthermore the 4 chan nels simultaneously perform this process to output the scanning signals of these 4 systems in parallel Analog output OS1 Transfe
28. SOL2 Bypass pickup clutch Bypass feed clutch Registration roller Registration roller clutch CLT1 Registration sensor S4 Drawer detection switch SW5 e STUDIO167 207 237 PAPER FEEDING SYSTEM February 2007 TOSHIBA TEC CORPORATION All rights reserved 10 2 10 3 Functions 1 Pickup roller This roller which has a semicircle shaped roller section draws out a sheet of paper from the drawer and transports it to the registration roller One rotation of the pickup roller transports one sheet of paper to the registration roller 2 Pickup solenoid SOL 1 Starts transmission of the drive to the drawer pickup clutch The driving force is not transmitted to the drawer pickup clutch when the pickup solenoid SOL 1 is turned OFF but is transmitted when it is turned ON The pickup roller rotates once for every one ON of the pickup solenoid SOL 1 3 Drawer pickup clutch This is a spring type mechanical one way clutch used to transmit the drive from the main motor M3 to the pickup roller When the pickup solenoid SOL1 is turned OFF the spring tension of the one way clutch is decreased to cut off the drive 4 Paper empty sensor S7 This is a transmissive type sensor and detects the availability of paper in the drawer When there is no paper in the drawer the actuator blocks the light path of the sensor and the sensor determines that there is no paper
29. TEXT PHOTO Gal PARS TUV WXYZ TEXT E JL AUTO DATA a 5 5 Fig 5 1 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUNCTION 5 6 CLEAR STOP 5 e STUDIO167 207 237 CONTROL PANEL 5 2 Items Shown on the Display Panel 5 2 1 Display 1 Basic display Displays buttons and messages NONSORT 2 Paper jam display Displays error code paper jam position and paper jam release guidance C Misfeed in copier E41 pem n umi etm E side cover A of the copier Fig 5 3 3 Service call display Displays error code and service call symbol Call for service C01 Fig 5 4 4 When input values can be changed by the up or down button in the self diagnosis mode the LED in the center of the up down left and right buttons is lit e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 5 2 2 Message No Message Condition of machine Notes 1 Wait warming up Being warmed up Displayed after the main switch is turned ON up until the machine becomes ready for copying 2 READY Standby for copying Copy quantity indicator shows The machine is ready for copying 1 When a digital key is presse
30. copys uon 50512 m ied EXPO sl CANCEL iral Lenis m E mn E EI EI E pas Soom Cpa L wr on si pe NM 02 SS 208 LMAX E7 LEFT tsau RIGET h pc ENTER wr 61217203000 Gown PWB F HPNL 286Q LEAD FREE PCBA DATA ERROR TOSHIBA 525 cwe February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 PC BOARDS 16 2 6 PWA F FUS TOSHIBA PWB F FUS 350 6LA42006000 PF WP FR 40 Fig 16 6 7 PWA F PFC 8 41 50 M 4 1 35 cl LU T 81 VHC24AMTCX c26 1 C35 R3 STK672 600 C40 100 50 pt 1 4 HD64F2388F20V I q 2 I 5 o E C39 C45 C46 C48 cag C50 C51 C52 C53 C54 C55 C56
31. jun L ZOLNO c 1014 ono 2 M 2 TNIVW OV 1 NIVIA 3 VMd os kepy JN 18 Ni ov 0 3JOA THHLIH v 2 HEN 90LNO NNIVIN OV NL s 5 Fig 15 3 e STUDIO167 207 237 POWER SUPPLY UNIT February 2007 TOSHIBA TEC CORPORATION All rights reserved 15 7 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 15 8 16 PC BOARDS 1 PWA F MAIN
32. ze Wvuas 70 4 91 vias 10j2euuoo SN 49 o3guo9 uiejs S 205 SJojsiuueu jun 4esn4 Josues 1 5 5 jun Josues Jase pieoq SNS 1ese jun jeondo Jase SdAH Sd 1 yun Ajddns 26 SIO 11141 pJ amp oq NIV Fig 2 10 e STUDIO167 207 237 OUTLINE OF THE MACHINE February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 15 2 4 2 Construction of boards 1 Construction diagram of boards This system consists of the following including the MAIN board as a main board 0 0 0 0 0 0 0 0 ll ll J 3655637 Laser optical unit AC input mmm Main switch Cover opening closing interlock switches Automatic duplexing unit D
33. 1049 R184 013 1051 TP14 TMP _ e I 970 1 L To62385are TN Eyes 5 5 P EET RATE 103820132 5 age 5 B 5 ie 5 2 gt 5 5 5 18 oS 1056 805 Is 5 52 2 3 cr x b gens cin Elies 23 vacr244 Lcxos CEA Bel cji 3526 o 10 16 de s 455 i 22 s TL RiSsNTADIDR kl 5718 6 OnLy I C950 55555555 80 zz 22 1 BHI 1 z c23 zc n ume e auc 22 5 470710 2 s O 2 SNTA0TDR 1 2017 4 1235 8192 RIGT E Ene 555252522 2 CLS ciem 5 1638 55 2 1040 a 82 gt amp E 25 5 1 gur fic ocu C 2 g 2 Be Ss ice I 123 gt gt z gH C165 T z ty 2 5 C166 i mus 22mm I 10627 106 S1L81282F238000 woissiorp Tei R237 410 10 m cus 1 5 C138 gt Es z na siia 259 5 21 98 z 9250 Emp z E Gn EG 5 572 glue 8 1 sess 8 8 5 amp R34 5 222 006 2 ae E 5 B o gt EO OE 6 5 Og 3 a I M518578FP YHCT32 os rss acu 9 eg gt 5 5 5 1612 50 5 d z TD62308AFG 2 3 5 zig ON 5 E10 E11 R e g
34. 11 7 11 5 1 General 11 7 11 5 2 Circuit conflguratiOr 11 7 11 6 Temperature Humidity Detection Circuit 11 8 11 6 1 General Description et e e docu e dedi a Fee dod ae Ne d 11 8 141 6 2 Circuit configU ratiOD coi c eed 11 8 11 7 Disassembly and Replacement isaisa EEEE 11 9 12 DEVELOPMENT SYSTEM ortu ure uno eoa a 12 1 12 1 General Description NY 12 1 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION rights reserved CONTENTS 12 2 CERERI ESI PIT 12 2 12 3 FUNCOMS 12 3 12 3 1 Function of each etr 12 3 12 3 2 Functions of the toner cartridge PC board 12 4 12 3 3 Recovered toner supply mechanism 1118 12 6 12 4 Toner Motor Control 12 7 12 5 Auto Ton r CIFCUIL ire e EG ee VER Dod Pk oe eae Au ev DUE EVE Ee Re dE 12 8 12 5 1 General description 12 8 12 5 2 Function of auto toner 8 12 9 12 6 Disassembly and 12 11 13 FUSER EXIT UN
35. 2 bushings and 2 oil seals from the holder Replacement of Oil seal P 12 21 H Replacement of Oil Seal Oil seal Bushing Fig 12 29 6 Take off the mixers 2 and 3 Fig 12 30 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 19 7 Remove 2 bushings and 2 oil seals on the rear side Replacement of Oil seal P 12 21 H Replacement of Oil Seal 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 10 Take off the mixer 1 e STUDIO167 207 237 DEVELOPMENT SYSTEM Bushing Fig 12 31 End section of mixer 1 CZ Oil seal Bushing Fig 12 32 Fig 12 33 February 2007 TOSHIBA TEC CORPORATION All rights reserved 12 20 11 Remove the bushing on the rear side 12 Remove the oil seal Replacement of Oil seal P 12 21 H Replacement of Oil Seal Fig 12 34 H Replacement of Oil Seal 1 Insert a fine screwdriver into the depression of the oil seal to take it out 2 Pushin a new oil seal parallel to the frame or bushing shown figure at right 3 Apply the grease Alvania No 2 amount of 2 Inside Outside rice grains on entire surface of the oil seal evenly Grease Note Wipe off the excessive grease Oil seal Fig 12 35
36. 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 17 07 03 Notes 1 Install the ADF original glass so that the attached Mylar sheet is placed on the front side 2 When installing the ADF original glass place it between 2 small guides with its left hand side pushed to the scanner top B Scanner top cover 1 Take off the original glass P 6 17 A Original glass 2 Take off the front upper cover Scanner top cover 7 P 2 20 F Front upper cover 3 Take off the control panel unit j iL P 5 7 A Control panel unit 4 Remove 8 screws and take off the scanner top cover e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 18 C Automatic original detection sensor APS sensor C 1 A4 series 59 513 1 Take off the original glass P 6 17 A Original glass 20 2 Disconnect 1 connector and remove 1 screw for each APS sensor Take off 5 APS sen Sors Note Sensor When installing the automatic original detec tion sensor connect the connector yellow to the connect one Connector Q Connector Yellow Fig 6 17 C 2 LT series 510 513 1 Take off the original glass P 6 17 A Original glass 2 D
37. 3 0 0 0 0 0 A4 0 1 0 0 0 B4 0 0 0 1 0 B5 1 1 0 1 0 A4 R 0 0 1 1 0 5 1 1 1 1 0 5 0 0 1 1 1 A5 R 0 1 1 1 1 LT Series Size judgement APS C APS R APS 2 APS 3 LD 0 0 0 0 LT 0 1 0 0 LG 0 0 1 0 LT R 0 1 1 0 ST 1 1 1 0 ST R 0 1 1 1 Code Output signal Original 1 H Not available 0 L Available When the platen sensor S2 is OFF The followings are determined by output signals from the APS sensors Size The combination of the signals satisfy any in the above chart Size is displayed on the control panel and a specific paper or reproduction ratio is selected Sizeretention The combination of the signals do not satisfy the above chart The latest original size recognized or no original state until new paper size is recognized No original Output from all the sensors are Reproduction ratio and paper are not selected Size change is always observed and detected The contact image sensor unit CIS stays at the standby position even if the reproduction ratio changes corresponding to the change of the original size When the platen sensor S2 is ON The latest original size or no original state recognized right before the platen sensor S2 is turned ON is retained regardless of the status the APS sensor output signals February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 15 About reflection type photosensor The reflection type photo
38. 6 22 E CIS home position sensor S1 1 Take off the original glass P 6 17 A Original glass 2 Remove 1 screw and take off the CIS home position sensor with the bracket Bracket CIS home position sensor Fig 6 23 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 SCANNER 6 21 3 Release 2 latches take off the CIS home position sensor release the harness from CIS home position sensor harness clamp and disconnect 1 connector Connector Fig 6 24 F Platen sensor S2 1 Take off the scanner top cover P 6 18 B Scanner top cover Ww Bracket 2 Remove 1 screw and take off the sensor with the bracket 3 Disconnect 1 harness clamp and 1 connec tor lt Fig 6 25 4 Release 2 latches and take off the platen sensor Platen sensor Fig 6 26 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 22 G CIS unit CIS 1 Take off the original glass P 6 17 A Original glass 2 Move the CIS unit to the right most position CIS unit Notes Besure 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 CIS unit drive belt 1 Fig 6 28 3 Remove the seal which fixes the harness Note Attach the seal by following the pr
39. AS AC AS Ave NIYIN 3J0 AOOAvC U91IMS Buisojo Buiuedo 13409 serq serq SLNO serq JojsueJ vino serq jedoje egq seq puo zino yndyno We A00Z We ASZL 9 2024 Regulator 2081 due Jayeay apis LOUL duie 1 epis 5 sayeay 5 VV A002 9 o O 0LND Buisojo Buiuedo 19409 1 Joy We A00e VEO ASZL onoo 2013 ZOLNO p1eoq Sn YMS Jejeou dweq Jesn 4 Buiyoyms Vero PIEBREN 9SION VSL ASZL Fig 15 1 e STUDIO167 207 237 POWER SUPPLY UNIT February 2007 TOSHIBA TEC CORPORATION All rights reserved 15 5 ON 15 6 Power Supply Sequence 700 ms or lower AC input 010 200
40. FEEDING SYSTEM 10 21 3 Release the harness from the harness clamp disconnect 1 connector and take off the registration roller clutch N Pickup solenoid 5011 1 Take off the rear cover P 2 22 J Rear cover 2 Release the harness from the harness clamp and disconnect 1 connector 3 Remove 1 screw and take off the pickup solenoid bracket Note Be sure not to drop the bushing e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 22 _7 Connector Fig 10 38 Harness clamp Fig 10 39 Pickup solenoid bracket Fig 10 40 February 2007 TOSHIBA TEC CORPORATION All rights reserved 4 Remove 1 screw and take off the pickup solenoid from the bracket O Drawer pickup clutch 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 SOL 1 3 Remove 1 E ring and take off the drawer pickup clutch 4 Take off the cover A cover B spring and flange February 2007 TOSHIBA TEC CORPORATION All rights reserved Fig 10 41 Drawer pickup clutch E ring Fig 10 42 Flange Cover B 7g Hook Spring Cover A Fig 10 43 e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 23 Note When assembling the draw
41. February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 21 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 22 13 FUSER EXIT UNIT 13 1 General Description In the equipment the fuser unit which fuses toner on the paper and the paper exit section exit roller which outputs the paper with the fused toner to the inner tray are combined together to make up the fuser exit unit In the fuser unit toner is fused by applying heat and pressure on the 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 M3 and the heat roller and exit roller are rotated by the main motor M3 When the automatic duplexing unit ADU optional is installed it is driven by the exit motor M7 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 exit sen sor which detects the status of the paper transport etc 2 Fuser separation finger Exit roller Exit sensor Center heater lamp Side heater lamp ressure roller Fuser thermostat Center Side Edge thermistor Fuser roller Fig 13 1 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUS
42. Fig 3 18 Separation charger e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 3 10 8 Fusing Fusing is the process of melting the toner on the paper and fixing it firmly on the paper Method The melting point of the toner main ingredi ent resin is 90 100 C V 2 Heat Toner is melted by the heat of the surface of Pressure the fuser roller 2 P d 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 Heat and pressure are applied to the paper when it passes between the fuser roller and Fig 3 19 pressure roller Separation finger Fusing The toner is fused on the paper Fuser roll r AN Heater lamp gt 6 Pressure roller Paper movement Fig 3 20 9 Cleaning Cleaning is the process of removing the residual toner from the photoconductive drum The edge of the urethane rubber cleaning blade is pressed against the photoconductive drum sur face to scrape off the residual toner on it The toner is then caught by the recovery blade Recovery blade Cleaning blade Drum rotation Fig 3 21 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 COPY PROCESS 3 11 10 Discharging Discharging is the process of eliminating the negative charge remaining on t
43. J Rear cover 2 Remove 2 screws and take off the cover e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved OUTLINE OF THE MACHINE 2 24 3 Disconnect 2 connectors remove 1 screw and then take off the fuse PC board by lifting it up Fuse PC board Fig 2 28 D Paper feed controller PC board PFC Note This paper feed controller PC board is optional for NAD CND and MJD 1 Take off the rear cover P 2 22 J Rear cover 2 Disconnect 2 connectors remove 4 screws and then take off the paper feed controller PC board and mylar sheet Notes e Ifthe ADU optional is installed discon nect 2 connectors of the ADU with other connectors at the same time before tak ing off the paper feed controller PC board If the optional is installed discon nect 2 connectors of the PFP with other connectors at the same time before tak ing off the paper feed controller PC board February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 25 E Switching regulator unit PS 1 Take off the left cover P 2 19 C Left cover 2 Disconnect 15 connectors Note The number of connectors to be discon nected is 15 when the following options are installed A Paper Feed Controller GH 1060 B Fax Kit GD 1220 Note
44. Preventing condensation in the scan Fig 2 3 9 18 Scanner damp heater Right ner unit Optional for NAD MJD CND model standard for other models DH3 DRM DH Preventing condensation of the drum Fig 2 6 8 6 Drum damp heater Optional for NAD MJD CND model standard for other models e STUDIO167 207 237 OUTLINE OF THE MACHINE February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 13 7 Thermistors and thermostats Symbol Name Function Remarks THMS1 THMS C HTR Detecting the surface temperature at Fig 2 5 23 6 Center thermistor the center of the fuser roller for con trolling the center heater lamp THMS2 THMS S HTR Detecting the surface temperature at Fig 2 5 23 6 Side thermistor the rear side of the fuser roller for con trolling the side heater lamp THMS3 THMS EDG HTR Detecting the surface temperature at Fig 2 5 23 6 Edge thermistor the edge of the rear side of the fuser roller for preventing overheating THMS4 THMS DRM Detecting the temperature on the drum Fig 2 6 21 49 Drum thermistor surface THMO1 THERMO FSR Preventing overheating in the fuser unit Fig 2 5 23 5 Fuser thermostat THMO2 THERMO SCN DH Preventing overheating in the scanner Fig 2 3 9 20 Scanner damp heater thermostat damp heater Optional for NAD MJD CND model standard for other models THERMO DRM DH Preventing overheating
45. Sane iue E Y yJ YG LED array CCD RGB light guiding tube Fig 6 2 CCD Scans the light reflected from an original and converts it to an electrical signal In order to realize the same to scale optical system of A3 width and 7084 image pixels the equipment uses 11 CCDs each CCD has 644 image pixels per line to make up a CIS sensor of 600x600 dpi resolution for scanning YG LED array Works as an assistant light for the RGB light guiding tube This YG LED array is used to reduce the shadow of the original when scanning is performed This LED array produces the output power of 7 68W February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER RGB light guiding tube A light from the LED array mounted on the CIS unit CIS goes through the original glass and lights the original Then the reflected light from the original is scanned by the CCD By adjusting each amount of R B and YG LED light with reference 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 sensor 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 to move the unit in the secondary scanning direc tion 4 CIS home position sensor S
46. Toner cartridge replacing method There is a recovered toner supply mechanism e Density control Automatic density mode and manual density mode selectable in 7 steps Approximately 32 5 kg 71 65 Ib excluding the developer material and toner e Power requirements AC 110 V 13 2 A 115 V or 127 12A 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 RADF PFU PFP and ADU through the equipment e Total counter Electronical counter February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES Dimensions of the equipment X e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 2 Accessories Unpacking setup instruction 1 set Operator 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
47. Y DC power ON Cover is open Heater lamp ON Registration sensor Scan motor ON Home position detected 13 15 seconds elapsed Peak detected a Call for service Call for service 203 26 21 Fig 4 3 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 GENERAL OPERATION 4 11 emperature of the fuser roller re or pre running YES NO temp e STUDIO167 207 237 GENERAL OPERATION d 90 Fuser roller reached ready Polygonal motor in abnormal ondition YES Call for service CA1 NO hermistor N broken YES Call for service C41 C43 Call for service C44 Fig 4 4 February 2007 TOSHIBA TEC CORPORATION All rights reserved 4 12 4 4 2 Automatic paper feed copying Press START button Developer bias Main motor ON Main chargeON Polygonal motor ON Discharge LED ON Exit motor ON Transport system control NO Call for service CA1 m Transfer charger ON Scanning system control Processing system control Polygonal motor normal rotation Pickup solenoid ON CIS move forward Pickup solenoid OFF Registration clutch ON CIS move backward CIS stopped Counter ON OFF Transfer charger OFF A Registration clutch OFF CIS OFF Ca
48. against the perfect vertical Horizontal deviation of the laser ligt qm A E 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 SNS The laser light which is started to be scanned from one of the reflected plane of the polygonal mirror is reflected by the H Sync returning mirror and enters the PIN diode on the H Sync signal detection PC board SNS The primary scanning synchronizing signal is generated based on this reflection Fig 8 6 5 Slit glass Slit glass is located where the laser beams are output from the laser optical unit and it protects the unit from dust e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 8 3 Laser Diode Control Circuit This equipment uses an AlGaAs type semiconductive laser with 5 mW of optical output power rating This laser emits a beam in a single transverse mode in approx 785 nm wavelength PIN diode for mon itoring optical output in this laser controls the laser intensity The relation between the forward current and optical output of a semiconductive laser is as shown below Beam emission starts when the forward current exceeds a threshold current and then the laser outputs a monitor current which is proportionate to the optical output Since semiconductive lasers have an individual variability
49. and release the ADU stopper on the front 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 5 Take offthe ADU cover while sliding it toward the right H Right front cover 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 February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 21 ADU stopper ADU stopper ADU cover Fig 2 19 ERAS Right front cover Fig 2 20 e STUDIO167 207 237 OUTLINE OF THE MACHINE I Right 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 Right rear cover Fig 2 21 J Rear cover 1 Remove 5 screws and take off the rear cover e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 22 2 6 Disassembly and Replacement of PC boards A MAIN board MAIN 1 Take off the rear cover P 2 22 J Rear cover 2 Disconnect 16 connectors Note Connect the flat ha
50. cover opening closing interlock voltage by opening closing of the ADU switch cover SW3 FRNT COV INTLCK SW Controlling cutoff and supply of the 24V Fig 2 4 1 5 Front cover opening closing interlock voltage by opening closing of the front switch cover SWA4 FRNT COV SW Detecting the opening closing of the Fig 2 4 1 101 Front cover opening closing switch front cover SW5 CST SW Detecting presence absence of the Fig 2 8 16 110 Drawer detection switch drawer 3 Electromagnetic clutch Symbol Name Function Remarks CLT1 RGST CLT Driving the registration roller Fig 2 7 16 21 Registration clutch 4 Solenoids Symbol Name Function Remarks SOL1 CST SOL Controlling the power transmission of Fig 2 7 16 9 Pickup solenoid the feed roller SOL2 SFB SOL Controlling the power transmission of Fig 2 9 14 15 Bypass pickup solenoid the bypass pickup roller e STUDIO167 207 237 OUTLINE OF THE MACHINE February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 12 5 PC boards Symbol Name Function Remarks MAIN PWA F MAIN Controlling the whole system and Fig 2 7 7 1 Main PC board MAIN board image processing SRAM 5 Storing the setting information of the Fig 2 7 7 33 SRAM PC board SRAM board equipment LDR PWA F LDR Driving the laser diode Fig 2 5 5 13 Laser driving PC board LDR board SNS PWA F SNS De
51. enabled when GA 1190 is installed and disabled when it is not installed 2 SCAN button This button is enabled when GA 1190 and GA 1200 are installed and disabled when they are not installed 3 FAX button This button is enabled when GD 1220 is installed and disabled when it is not installed e STUDIO167 207 237 CONTROL PANEL February 2007 TOSHIBA TEC CORPORATION All rights reserved 5 4 Operation 5 4 1 Block diagram The control panel which mainly consists of the panel controlling ASIC and LED driver transmits receives the control signal to from the SoC on the MAIN board controls the LCD detects the key pressed and controls the ON OFF of the LED and buzzer The LCD is controlled by the signal output from the panel controlling ASIC based on the information output from the SoC via the control panel data bus ODO to 7 The input status of each button is output to the SoC via the data bus ODO to 7 by the panel controlling ASIC and detected Each LED is controlled to be lit by the LED driver based on the information of the serial data OPLDSO output from the SoC The buzzer is controlled by the buzzer ON signal BZON output from the ASIC on the MAIN board MAIN board Control panel 5V 5VB 12V Control panel data bus ODO 7 Panel controlling Hard key matrix Serial data OPLDSO LED wr Nor driver a Buzzer ON signal BZON F
52. 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 main board in this equipment The following diagram shows the process of the equipment from scanning of original to writing data on the photoconductive drum surface Scanning section Image processing section Writing section ae Original 55555 Original glass co 1 Image processing Scanning scanning control laser drive section l section gt writing control gt LDR CIS AINI ede Semiconductive laser element Photo conductive drum REDEEM 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 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 IMAGE PROCESSING 7 2 Config
53. in the Copier machine copier by following the messages 11 Misfeed in doc Feeder Original jammed Open the ADF jam access cover and ADF e An original is jammed the ADF the ADF unit and remove the jammed original 12 Misfeed in duplexer Paper jammed in the ADU Remove the paper jammed in the ADU copier by following the message 13 Call for service Some part of the mechanism motors Turn OFF the machine remove the switches or sensors is abnormal cause of the fault and turn the machine back ON 14 Time for maintenance Indication of PM cycle Maintenance and inspection by a quali Displayed when it is time for pre fied service technician ventive maintenance and inspection Capable of copying February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 CONTROL PANEL 5 3 Relation between Equipment State and Operation START CLEAR FUNC INTER ENER COPY PRINT SCAN FAX Other STOP TION RUPT GY 71 2 3 but CLEAR SAVER tons keys Waiting Starts Clears Clears Enters Enters Enters Enters Enters Opera copying copy each into into into into into tion quantity setting inter energy printjob SCAN FAX accept rupting saving list Screen screen able copy mode or screen sleep mode Warming Reserve Clears Clears Opera up s auto copy ea
54. in the drum Fig 2 6 8 7 Drum damp heater thermostat damp heater Optional for NAD MJD CND model standard for other models 8 Others Symbol Name Function Remarks 5 5 Reading originals Fig 2 3 9 8 Contact image sensor unit PS PS ACC Generating DC voltage and supply Fig 2 4 5 2 Switching regulator ing it to each section of the equip ment Generating high voltage and sup plying it to the main charger devel oper transfer and separation units Supplying AC power to the heater lamp LCD LCD Displaying each information Fig 2 3 4 19 LCD panel e STUDIO167 207 237 OUTLINE OF THE MACHINE February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 14 General Description 2 4 System block diagram 2 4 1 1 Jejoquoo paeo Kay jun ssed g S YAMS Hod olsv 5105095 gsn 40j2euuoo gsn 1 16 800 1 ASV801 NYT WOY Usel4 W3QONW Aieneg any WOY q 94 sna 4 WVus vas aW v9 aw 9
55. in their threshold current and monitor current the optical output needs an adjustment to be maintained at a certain value The optical output of a semiconductive laser decreases as the laser temperature rises Therefore APC Auto Power Control needs to be performed to maintain a constant optical output 4 Regulation High temp z n 4 hint 1 2 52 rog 2 g 2 1 7 42 1 oO 4 2 Low temp 1 8 Forward current a Monitor current 7 Current mA Threshould current 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 uW on the drum surface The voltage of the monitor output which has been regulated by this adjustment is then fed back to a laser power comparison circuit In the laser power comparison circuit this voltage fed back and a laser power voltage set for the control circuit are compared for every scanning As the result of this a laser driver circuit increases its forward current when the laser power is insufficient and decreases it when the laser power is excessive to main tain a constant optical output Power source Laser power comparison Laser driver Semiconductive laser is circuit ci
56. manual or other related documents Be careful not to install small parts such as Screws washers pins E rings star washers in the wrong places Basically the equipment should not be operated with any parts removed or disassembled The PC board must be stored in an anti electrostatic bag and handled carefully using a wristband since the ICs on it may be damaged due to static electricity Caution Before using the wristband unplug the power cable of the equipment and make sure that there are no charged objects which are not insulated in the vicinity Avoid expose to laser beam during service This equipment uses a laser diode Be sure not to expose your eyes to the laser beam Do not insert reflecting parts or tools such as a screwdriver on the laser beam path Remove all reflecting metals such as watches rings etc before starting service Be sure not to touch high temperature sections such as the exposure lamp fuser unit damp heater and areas around them Be sure not to touch high voltage sections such as the chargers developer high voltage trans former and power supply unit Especially the board of these components should not be touched since the electric 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 l
57. ms 10 ms or higher 1 20 ms or higher 1 200 ms 1 1 1 i 1 i 1 i 1 i 1 i 1 i 1 1 1 i 1 i 1 i 1 1 1 i 1 1 i 1 1 200 ms or lower ri r ko 1 il il E il iil 11 rd tal il il iil ji T rd 1 1 p iil iol il id iil il id 11 iil iol iil il ii id iil il il E iil ii 1 i m iil il iil il iil 1 1 T 1i ES gt o 2 8 ee o E 8 Z o 2 S 2 S 8 2 epo cen 5 o P MEN 2 2 2 E 5 2 z 7 7 o o 8 2 gt u gt 95 m E amp 28 o 5 gt amp tc 3 z YS 2 amp x 2 x a o 9 lt o 59 5 x z amp x 9 g 5 a 59 Qa gt Fig 15 2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 POWER SUPPLY UNIT 15 6 15 7 AC Wire Harness
58. of the front and rear sides 2 Do not twist the wire 3 Do not touch the wire directly with bare hands Spring Fig 11 28 N Transfer unit Note When taking off the transfer unit take off the process unit first to prevent the drum from light 1 Open off the ADU cover 2 Take off 2 guides Y ro Ys EN Fig 11 29 3 Take off the transfer unit while pulling the lever Transfer unit Fig 11 30 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 17 4 Remove 1 screw and take off the harness 5 gt PX STRIS 5 Disconnect 1 connector 6 Take off the transfer unit while lifting it up Fig 11 33 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 18 0 Ozone filter QM 1 2 Open the ADU cover Release 1 latch and take off the rear side guide 3 4 Remove 1 screw and take off the ozone filter cover Take off the ozone filter P Exhaust fan M5 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 February 2007 TOSHIBA TEC CORPORATIO
59. polygonal mirror is rotated by the polygonal motor M4 B the reflected laser light moves in sync with the rotation The direction of the movement is the primary scanning direction of the image One scan is performed on one plane of the polygo gt Drum nal mirror As the polygonal mirror has six planes six scans are performed in one rotation of the polygonal mirror Laser beam C Drum Laser beam Fig 8 4 One scan is completed by completion of steps A to C One scan is performed on one plane of the polygonalmirror Six scans can be made with one rotation of the polygonal mirror February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 LASER OPTICAL UNIT 3 10 lenses 1 and 2 These two lenses perform the following adjustment on the laser beams reflected by the polygonal mirror 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 16 lenses help to correct this difference making all the dot to dot pitches equal on the drum surface f Lens 1 10 Lens 2 Same intervals Fig 8 5 b Face tilt correction The reflecting face of the polygonal mirror is Mirror plane is tilted Deviation tilted slightly to one side
60. required to be installed The external keyboard GJ 1040 is necessary for the installation of the fax kit GD 1220 and the scanner upgrade kit GA 1200 e STUDIO167 207 237 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES February 2007 TOSHIBA TEC CORPORATION All rights reserved 1 4 Supplies Drum OD 1600 except 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 ZT1640T5 4 for Taiwan PS ZT1640E 1 for Europe PS ZT1640E5K 1 for Europe Developer material D 2320 except for China D 2320C for China February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES System List 1 5 Ov9L HIN 8201 seq JoMeJq pee ZZ0L AW J 0021 9 yy yun 1edeg Jeuueog February 2007 TOSHIBA TEC CORPORATION All rights reserved 0901 H9 0611 99 29 Jejuug 02ci d9 92111006 XJOMJON pee
61. sensor S8 detects it and judges that there is paper on the bypass tray and the bypass feeding is performed in preference to drawer feeding When the bypass pickup solenoid 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 roller Bypass feed clutch Bypass pickup clutch Bypass feed clutch Bypass pickup clutch Bypass pickup solenoid Fig 10 4 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 7 B Paper separation This model is equipped with a separation pad which works to prevent multiple paper feeding The sepa ration pad is pushed to the bypass feed roller by the spring force The bypass feed roller is rotated syn chronously with the bypass pickup roller When two or more sheets of paper are fed from the bypass pickup roller since the friction 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 r
62. started to be fed out of the ADU to the equipment error code E11 ADU open jam error code E43 occurs when the ADU is opened during the duplex printing and thus the ADU motor is stopped The equipment is never to be stopped during printing by interruption in any case except paper jam or service call The operation of the duplex printing differs depending on the size of the paper single paper circulation and alternateness circulation The figures in the following pages show the circulating operations during duplex copying The numbers in the figures indicate the page numbers e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 6 1 Single paper circulation With the paper larger than A4 LT size duplex printing back side printing gt front side printing is performed for one sheet at a time as shown below I I 1 V VI X February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 7 2 Double paper alternateness circulation With A4 LT size paper or smaller duplex printing is performed for two sheets at a time as shown below Back side of the 1st sheet Back side of the 2nd sheet gt Front side of the 1st sheet Front side of the 2nd sheet Fig 14 4 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All r
63. the drawer 2 Rotate the pickup roller shaft counterclock wise to make the rubber surface of the roller facing down Note Because the tension is applied to the pickup roller shaft by the pickup clutch when it is rotated counter clockwise be sure to hold the shaft while replacing the roller Pickup roller 3 Push 2 latches each to take off 2 pickup roll ers Notes T Im Be sure to install the pickup roller in the correct direction when reassembling it Fig 10 35 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 Pickup roller 7 MEM S S Fig 10 36 M Registration roller clutch CLT1 1 Take off the rear cover P 2 22 J Rear cover Registration roller holder 2 Remove 2 screws and take off registration mdi roller holder Note eee When installing the registration roller holder engage the arm of the registration roller clutch with the rotation stopper of the regis tration roller holder Rotation stopper Fig 10 37 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER
64. thermistor THMS4 detects the drum surface temperature and thus the rotation speed of the exhaust fan M5 is controlled when the equipment is in the ready status 8 Switching regulator PS This is a board to generate the output control voltage of the main charger main charger grid trans fer charger separation charger developer bias and pre post transfer guide bias 9 Temperature Humidity sensor S3 This sensor and drum thermistors THMS1 THMS2 detect the temperature and humidity inside of the equipment since the drum developer material and paper are affected by environmental ele ments such as temperature or humidity Thus the main charger grid transfer separation charger transfer guide bias developer bias laser output and auto toner output are controlled to be at their optimum states e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 4 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 MAIN board Switching re
65. through the optical elements such as cylinder lenses polygonal mirror and f0 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 Laser diode H sync returning mirror SNS board 10 lens 2 LDR board Fine focus lens Aperture Slit 10 lens 1 Cylinder lens Polygonal motor Fig 8 2 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 LASER OPTICAL UNIT 8 2 Structure Laser optical unit 1 beam Laser emission unit Laser diode Wavelength Approx 785 nm Output power rating 5 mW Fine focus lens Aperture Slit Cylinder lens Laser driving PC board LDR Polygonal motor unit Polygonal motor M4 Polygonal mirror 6 planes 10 lens 1 10 lens 2 H Sync returning mirror Slit glass H sync signal detection PC board SNS 1 Laser emission Unit This unit consists of the laser diode finite focus lens aperture and cylinder lens Laser diode This laser diode features low droop small laser variation and low threshold current Aperture determines the shape of the laser beam at laser emission position of the primary scan ning and secondary scanning Laser diode radiates the laser beams responding to the laser emission control ON OFF signals from the laser driving PC board LDR Laser beams which passed through the finite f
66. toner cartridge is used or not Toner remaining check function This function notifies the user of the near empty status of toner Normally the message Toner is low is displayed when the toner is running out and Toner empty when the toner cartridge is empty Toner remaining check notification function Upon detecting the near empty status of toner this function automatically notifies your service rep resentative Operations Toner cartridge Recommended cartridge Recommended cartridge refilled with new toner Non recommended cartridge Cartridge detecting function Enabled Toner not recognized is displayed when no cartridge is installed Enabled Toner not recognized is displayed when no car tridge is installed Disabled Toner not recognized is dis played even when the car tridge is installed Toner remaining check function Enabled Toner is low is displayed when the cartridge is nearly empty Disabled Toner is low is displayed even when a new cartridge is installed Disabled This function does not oper ate Toner remaining check notification function Enabled Disabled Disabled A sign of the status that the toner cartridge is nearly empty 7 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
67. 07 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 16 15 POWER SUPPLY UNIT 15 4 Construction The power supply unit consists of the AC filter insulated side DC output circuit high voltage output cir cuit and heater lamp control circuit 1 AC filter Eliminates noise from the outside and prevents the noise generated by the equipment from leaking to the outside 2 DC output circuit Low voltage output circuit Converts AC voltage input from outside to DC voltage and supplies it to each electric part The DC voltage is divided into the following two lines a Main switch line Power supply used in the entire equipment during the image forming process Six kinds of voltage 5V 5VB 12V 12V 24V and 24VDF are out put when the main switch of the equipment is turned ON b Cover switch line Power supply used in the entire equipment during the image forming process It is supplied 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 supplied 3 High voltage output circuit Generates the output currents voltages for the charger developer transfer and separation biases based on the 24V voltage which is generat
68. 1 This sensor detects if the CIS unit is at its home position 5 Automatic original detection sensor 59 513 The size of an original placed on the glass is instantly detected using the APS sensors fixed on the base frame e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 4 Description of Operation 6 4 1 Scanning operation Scanning an original on the original glass The rotation of the scan motor M1 is transmitted to the 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 RADF The CIS unit CIS stops and stays at the shading position during the shading correction and at the scanning position during the scanning operation February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 4 2 Scan motor drive circuit The scan motor M1 is a 2 phase stepping motor and is driven by the motor driver 122 5V N 24V N VDD 5V X m VSS GND 77 B B Excitation mode setting 2 Fixed at H MODE2 SCNMDO Excitation mode Setting 1 7 MODE1 B B ASIC SCANRST Resetting 1C23 RESE
69. 35 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 22 14 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 1 General Description The Automatic Duplexing Unit ADU is a unit to reverse a sheet of paper at duplex copying A switchback method using the exit roller is adopted for the ADU of this equipment Immediately after the printing of one side fusing process is completed the paper is switchbacked by the exit roller The paper being reversed is then transported to the registration roller for the printing of the other side The ADU mainly consists of the transport rollers and their drive section the paper guides and the ADU driving PC board ADU Exit motor Exit roller ADU motor ZA 2 Fig 14 1 February 2007 TOSHIBA CORPORATION rights reserved e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 1 14 1 1 Specifications of MD 0103 Item Specification Remarks Reversal method Stackless switchback method Paper size A3 A4 A4 R A5 R B4 B5 B5 R FOLIO LD LG LT LT R ST R COMPUTER 13 LG 8 5 x8 5 SQ 8K 16K 16K R Paper weight 64 to 80g m 17 to 22 Ib Bond Dimensions W466 x D55 x H244 mm Paper guide outside W307 x D50 x H200 mm Paper guide inside W61 x D50 x H101 mm Motor unit Weight Approx 1 2 kg Tot
70. 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 SOL 1 4 Remove 2 screws and then take off the feed gear unit Feed gear unit Fig 10 49 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 25 S Drawer detection switch SW5 1 Take off the damp heater unit or dummy plate P 10 19 J Damp heater unit DH3 Dummy plate 2 Release the latch take off the bracket while lifting it up and then disconnect the connec tor 3 Release the latch and take off the drawer detection switch from the bracket T Registration sensor S4 1 Take off the rear cover P 2 22 J Rear cover 2 Release the harness from the harness clamp and disconnect 1 connector e STUDIO167 207 237 PAPER FEEDING SYSTEM Connector Drawer detection i switch bracket Fig 10 50 Drawer detection switch bracket Drawer detection switch Fig 10 51 Harness clamp Fig 10 52 February 2007 TOSHIBA TEC CORPORATION All rights reserved 10 26 3 Take off the damp heater unit or dummy plate P 10 19 J Damp heater unit DH3 Dummy plate Take off the registration rol
71. 7 EnOuUAH ye 9 1 9 1 General cab dena 9 1 9 2 buts esse ope rsen ed ee dade 9 2 de dean kt ke 9 3 9 4 Main Motor Control Circuit m Irene 9 4 9 5 Disassembly and Replacement ipa ek 9 6 10 PAPER FEEDING SYSTEM eniro rein seo a o reto ia o Eau eo cuu aa ee eu 10 1 10 1 General Description rr e ere pde eed ae 10 1 10 2 Configuration 10 2 10 3 FUNCIONS mee 10 3 10 4 10 5 EPIIT 10 5 10 4 2 SVECEE TP 10 7 10 4 3 General operation iecore ut Lor E 10 9 10 5 Disassembly and 10 10 11 DRUM RELATED SECTION 2 11 1 11 1 General Description aito 11 1 11 2 TRS FUNCIONS sien E 11 3 11 4 High Voltage Output Control Circuit nennen 11 5 11 41 General descriptiOn iilii ete arise tent Fett ain he RR RR o Ree 11 5 11 4 2 Description of 11 6 11 5 Drum Temperature Detection
72. A1 CN24 C151 Fiver ONLY OPTION Hvor ONLY OPTION cz Fig 16 1 2 PWA F SRAM RV5C348B c8 I 01 c5 I CY62126DV30LL TOSHIBA PWB F SRAM 284Q 6LH27202000 LEAD FREE PCBA gt EP GW lt Fig 16 2 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 PC BOARDS 16 1 3 PWA F LDR amp PWB F LDR 360 61410323000 416 TOSHIBA 4 PWA F SNS v m 220 AD Tx PWB F SNS 330 6LE09148000 i 1 GA220T2L1 TOSHIBA CN203 5 PWA F HPNL af J ju en mi FUNCT o COPYT oRG2 E coPY7 J 0PY3 scs uon m m Sua guo 558 E n mal m lenis E PHOTO b bn pRGSE 1 TJ
73. AII rights reserved e STUDIO167 207 237 SCANNER 6 11 6 6 Automatic Original Size Detection Circuit This circuit detects the size of original standard sizes only using the reflection type photosensors arranged on the base frame of the scanner unit 6 6 1 Principle of original size detection Reflection type photosensors are placed on the base frame of the scanner unit as shown in the figure below Each sensor consists of an infrared Light Emitting Diode LED on the light emitting side and a phototransistor on the light receiving side When there is an original on the original glass light beams from the LEDs are reflected by the original and led to the phototransistors This means that the presence of the original is detected by the pres ence of reflection when scanning black image A4 Series LT Series Original Original glass Original Original glass APS R 72 APS R APS 3 APS 3 5 1 5 5 2 5 5 2 Fig 6 7 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION rights reserved SCANNER 6 12 6 6 2 Process of detection of original size 1 When the equipment is in the original size detection mode contact image sensor unit CIS is set at its home position 2 When the platen cover is opened the sensors receive the light reflected from the original and if one of the matrix conditions shown in 4 for original sizes are met the size of the original is instantly detecte
74. AMs 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 d barrasser de batteries et IC RAMs us s y compris les batteries en lithium selon ce manuel Vorsicht Entsorgung der gebrauchten Batterien und IC RAMs inclusive der Lithium Batterie nach diesem Handbuch CONTENTS 1 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 1 1 1 Specifications EE 1 1 1 2 vL rcm 1 5 152 OU OMS testet DU UI RENI M RP NIME UI E 1 6 14 Supplies etatem ee y 1 7 1 5 LIST n 1 8 2 OUTLINE OF THE MACHINE 22 22 icio incu nee 2 1 2 1 Sectional eee eee 0000 2 1 2 2 Electric Layout iore Reo eeu er Re Mars eu od e ea 2 4 2 3 Symbols and Functions of Various 2 11 2 4 General Description 2 15 2 4 1 System block 2 15 2 4 2 Construction Of Doards Ead 2 16 2 5 Disassembly and Replacement of
75. C power supply line i AC power supply line Signal ine Fig 2 11 2 Function of each board MAIN board This is the board taking the leading part in all systems It consists of the SoC ASIC memory SDRAM Flash etc In the SoC System control which is a core of this MAIN board the functions of the CPU image processing page memory control CODEC external interface USB control etc are embedded and performed by one chip Based on the data input from the control panel the SoC controls each system such as the ASIC each memory CIS unit and laser optical unit and thus permitting the scanning of 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 e HPNL board This is the board on which each button switch and LEDs on the control panel and the LCD control circuit are mounted CTRG board This is the board on which the IC chip for storing information about the toner cartridge number of prints identification data etc is mounted e CTIF board This is the interface board with the CTRG board in the toner cartridge Information written in the IC chip on the CTRG board is read into the SoC on the MAIN board through this boar
76. CHINE 2 38 3 COPY PROCESS 3 1 General Description of Copying Process Paper exit 8 Fusing Lamp heating method 9 564W x2 10 Discharging PES a 2 Data reading scanning Discharge LED red aa Blade method CIS Wavelength 660nm x10pcs 600 dpi 7084 pixel 44 9 1 Charging 7 e STUDIO167 207 448V e STUDIO237 454 N Separation grid voltage Image processing 107 C 107 3 Data writing L 70 uADC Semiconductive laser Pw 4 0 nJ mm Transfer 340 C 369 L 282 Transfer bias 4 Development DC 565V Magnetic roller Bias 340VDC AC Fig 3 1 1 X Charging Applies negative charge on the 7 surface of the photoconductive drum V 2 reading The images on the original 8 are converted into electrical signals V 3 Data writing The electrical signals are con 9 verted into light signal laser emission which exposes the surface of the photo conductive drum V 4 Development Negatively charged toner 10 adheres to the photoconductive drum and forms visible image 5 Transfer bias Improves transfer efficiency V 6 Transfer Transfers the visible toner image on the photoconductive drum onto paper Vy February 2007 TOSHIBA TEC CORPORATION All rights reserved
77. DIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 4 2 3 Drawer feed copying 1 2 3 4 5 6 7 Press the START button READY COPYING CIS LED ON Scan motor ON CIS unit move forward Polygonal motor rotates in high speed Main motor and exit motor ON The drum fuser unit developer unit and exit roller are driven Drawer paper feeding Main charger developer bias and discharge LED ON Fans are rotated in high speed Pickup solenoid ON Pickup roller start to rotate Pickup solenoid OFF after a certain period of time Paper reaches the registration roller The registration sensor is turned ON and aligning is performed After the scanning operation Registration clutch ON after a certain period of time gt paper is transported to the transfer area Copy counter operates After the registration clutch is turned ON Transfer charger ON after a certain period of time Copy counter operates 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 Paper exit 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
78. EC CORPORATION All rights reserved FUSER EXIT UNIT 13 4 13 4 Operation The fuser roller is pressed by the pressure roller with the spring force The fuser roller is rotated by the main motor drive and the pressure roller is rotated by the rotation of the fuser roller In addition the heater lamps in the fuser roller do not structurally rotate 2 heater lamps having different functions are installed one applies heat to the center part of the fuser roller and the other applies heat to both ends of the roller In this equipment the surface temperature of the fuser roller at any paper size can be maintained by controlling the turning ON OFF of the 2 heater lamps The thermistors control the temperature of the fuser roller and detect temperature abnormalities If the temperature becomes excessively high the thermostat is opened to stop the power supply to the heater lamps Then the paper transported to 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 the fuser unit is started the heater lamps are turned ON If the temperature of the fuser roller does not reach or exceeds a specified temperature wi
79. ER EXIT UNIT 13 1 13 2 Configurations Fuser exit unit Pressure 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 170 C Separation finger Periodic replacement part Exit roller Exit motor M7 Stepping motor option e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 2 13 3 Functions 1 2 3 4 5 6 7 8 9 Pressure roller The pressure roller is a sponge roller which assures the nip amount of the fuser roller The pressure from the spring presses the paper onto the fuser roller to fuse toner onto the paper efficiently Exit sensor S5 The exit sensor detects if the leading or trailing edge of the paper is passing through the pressure roller and the fuser roller This sensor is used for the detection of paper jams in the fuser exit unit as well Fuser roller The fuser roller applies heat onto the paper and is heated by the heater lamps installed inside of the fuser roller The heat from this roller fuses toner onto the paper The fuser roller in this equipment is a thin roller which enhances heat conduction and
80. IBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 22 12 DEVELOPMENT SYSTEM 12 4 General Description Development is the process of converting electrostatic latent images into visible images The developer material is supplied onto the photoconductive drum surface by the developer sleeve magnet roller Then the toner in the 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 to rotate the mixers and the developer sleeve Drum thermistor Drum Doctor blade Toner recycling auger Mixer 3 Mixer 2 Auto toner sensor Mixer 1 Developer sleeve Fig 12 1 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 1 12 2 Construction Developer 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
81. IC DUPLEXING UNIT ADU OPTION MD 0103 13 D Upper transport roller 1 Take off the ADU P 14 12 A Automatic Duplexing Unit Pin Belt ADU 2 Take off the ADU motor P 14 13 C ADU motor M8 3 Remove 2 E rings 2 pulleys and 2 pins and then take off the timing belt Pulley E ring Fig 14 14 4 Remove 1 E ring 1 gear and 2 bushings and then take off the upper transport roller Upper transport roller Fig 14 15 E Lower transport roller 1 Take off the ADU P 14 12 A Automatic Duplexing Unit Pin Belt ADU 2 Remove 2 E rings 2 pulleys and 2 pins and then take off the timing belt Pulley Fig 14 16 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 14 Remove 1 clip and 2 bushings and then take off the lower transport roller 3 Fig 14 17 F Paper guide Open the ADU cover 1 Release 1 latch and take off the guide on the front side 2 Fig 14 18 Paper guide e STUDIO167 207 237 Fig 14 19 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 Release 1 latch and take off the paper guide while sliding it toward the font 3 February 2007 TOSHIBA TEC CORPORATION All rights reserved 14 15 e STUDIO167 207 237 February 20
82. IT 0 4 8 4 4 nua anas a das nass 13 1 13 1 General Description iet Roe Sese cda dex she 13 1 13 2 CONMG ULATIONS Em 13 2 13 3 13 3 13 4 OPS ration 13 5 13 5 Fuser Unit Control Circuit iuis e eoo nett a a in dive epe npe ax cox vu pede Rd 13 6 13 5 1 etre Eoi uiae ander tbat uei uuu 13 6 13 5 2 Temperature detection 13 7 13 6 Disassembly and 13 12 14 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 1 14 1 General sa rrr 14 1 14 1 1 Specifications of MD 0103 00000 10 0000000 14 2 14 3 14 3 FUMCHOMNS cc 14 4 144 Drive Of ADU 14 5 14 5 Description of nnne 14 6 VA OSI OW Cha ctu poten 14 11 14 7 Disassembly and 14 12 15 POWER SUPPLY UNIT
83. N All rights reserved Guide Ozone filter Ozone filter cover Fig 11 35 Post transfer guide c9 Fig 11 36 e STUDIO167 207 237 DRUM RELATED SECTION 11 19 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 20 Temperature humidity sensor S3 1 Take off the left cover P 2 19 C Left cover 2 Disconnect 1 connector remove 1 screw and then take off the temperature humidity sensor R Toner cartridge interface PC board CTIF 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 Temperature Humidity sensor Fig 11 40 Toner cartridge interface PC board February 2007 TOSHIBA TEC CORPORATION All rights reserved 11 21 Fig 11 41 e STUDIO167 207 237 DRUM RELATED SECTION e STUDIO167 207 237 February 2007 TOSH
84. OMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 4 14 4 Drive of ADU When the ADU motor M8 rotates in the direction A the transport rollers upper and lower rotate to transport paper through the drive of the gear and the belt ADU motor Upper transport roller ADU sensor Em Bc ADU driving PC board Lower transport roller Fig 14 2 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 5 14 5 Description of Operation The back side printing recording data of the back side of paper is performed first by selecting duplex printing mode and pressing the START button When the trailing edge of the paper passes the exit gate the paper is switchbacked by the exit roller and transported into the ADU The front side printing recording data of the front side of paper is performed at the registration section The paper passes through the exit gate again and is transported to the inner tray to complete duplex printing The detection of paper jam is performed in two methods In one method the paper jam is judged by whether the ADU sensor is turned ON or not within a specified period of time after the paper started to be switchbacked to the ADU error code E51 and in another method it is judged by whether the reg istration sensor S4 is turned ON or not within a specified period of time after the paper
85. ON AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 31 3 Remove the ground wire 4 Disconnect the connector 5 Install the PFU connector cover e STUDIO167 207 237 OUTLINE OF THE MACHINE Fig 2 46 Fig 2 47 Q Woe Fig 2 48 February 2007 TOSHIBA TEC CORPORATION All rights reserved 2 32 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 bracket on the front left side Fig 2 51 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 33 10 Remove 1 screw and take off 1 fixing bracket on the front right side Fig 2 52 11 Remove 1 screw and take off 1 fixing bracket on the rear left side Fig 2 53 12 Remove 1 screw and take off 1 fixing bracket on the rear right side Fig 2 54 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 34 13 Lift up the equipment and take off the PFU
86. ON All rights reserved FUSER EXIT UNIT 13 14 4 Close the guide and then take off 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 K 55 AS gt W N 27 gt 25 Guide Spring 6 Remove the Mylar 7 Disconnect 1 connector release 2 latches and then take off the exit sensor Exit sensor Fig 13 17 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 15 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 Hook Spring Fig 13 18 E Separation finger GD 1 Take off the fuser roller unit P 13 12 B Pressure roller unit Fuser roller unit 2 Remove 3 screws and take off the sub guide Fig 13 19 3 Remove 5 springs from the hooks Fig 13 20 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved FUSER EXIT UNIT 13 16 4 Remove 5 drum separation fingers with the springs Fig 13 21 Center heater lamp Side heater lamp LAMP1 LAMP2 1 Take off the fuser roller unit P 13 12 B Pressure roller unit Fuser roller unit 2 Remove 2 screws on each terminal of both center heater lamp and side heater lam
87. Release the harness from the harness clamp and pull out the discharge LED D Main charger 1 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 E Main charger grid GD 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 e STUDIO167 207 237 DRUM RELATED SECTION 11 12 Discharge LED Fig 11 14 Fig 11 15 Fig 11 16 February 2007 TOSHIBA TEC CORPORATION All rights reserved F Main charger cleaner 1 Take off the main charger P 11 12 D Main charger 2 Release the hook of the cleaning shaft Then rotate the shaft at 90 degrees to take it off G Needle electrode 7 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 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 February 2007 TOSHIBA TEC CORPORATION All rights reserved 11 13 Main charger cleaner Fig 11 17 Te
88. STUDIO167 207 237 PAPER FEEDING SYSTEM 10 13 E Bypass pickup roller zy 1 Take off the bypass roller unit 10 12 D Bypass roller unit 2 Take off the bypass pickup roller and the shaft Bypass pickup roller Fig 10 18 Bypass feed roller QM 1 Take off the bypass roller unit P 10 12 D Bypass roller unit Bypass feed roller 2 Remove 1 clip Then pull out the shaft 3 Take off the bypass feed roller Shaft Fig 10 19 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 14 G Bypass sensor S8 1 Remove 1 screw on the bottom of the equip ment 3 SI 2 Take off the bypass sensor with the bracket N PES lt SS NONE S PN T ope ALN LS ES XSL Bracket 8 Fig 10 20 3 Take off the actuator with the spring while pushing the bracket stays wider Actuator Bracket 4 Release 2 latches take off the bypass sen sor and disconnect the connector Bracket Bypass sensor Fig 10 22 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 15 Bypass pickup solenoid SOL2 1 Take off the bypass unit 10 10 Bypass unit 2 Remove 1 screw 3 Release the harness from the harness clamp and slide the pickup so
89. TB x gt A A SCNDIR Motor rotation direction setting CWB SCNEN Cutting off of the drive output A A ENABLE SCNCLK Clock input SoC P CLOCK VREF SCNMVR 1 53 Voltage to set value for the motor current GND PG1 PG2 GND Driver IC MAIN board ET Fig 6 3 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER Description of input signal Clock input SCNCLK Input The scan motor is rotated by inputting the pulses CLK Internal circuit of the motor driver works when the first pulse of the input becomes ON maximum input clock is 9000 PPS Motor rotation direction setting SCNDIR Input The direction of the motor rotation is determined by setting the level of the signal Clockwise direction L Counterclockwise direction rotation direction within 7 usec before the first pulse of the CLK comes should not 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 SCNMDO Input Sets the excitation mode setting should not be changed within 7usec after the first pulse of the CLK comes ON Resetting SCANRST Input Resets the whole system L 10 usec or more Internal circuit of the driver is ini tialized
90. TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 18 J Damp heater unit DH3 Dummy plate Notes This damp heater unit is optional for NAD CND and MJD The dummy plate is attached to the equipment in 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 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 Damp heater unit or dummy plate Fig 10 32 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 19 Paper empty sensor S7 1 Take off the drawer 2 Take off the damp heater unit or dummy plate Connector 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 Bracket Paper empty sensor Fig 10 34 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 20 L Pickup roller 1 Take off
91. TIRADA Y CUANDO AUSSETZEN EL INTERRUPTOR DE SEGURIDAD ESTA DE SACTIVADO EVITE EXPOSICION DIRECTA AL RAYO gt PS lt Fig 8 3 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT Cautions Avoid expose to laser beam during service This equipment uses a laser diode Be sure not to expose your eyes to the laser beam Do not insert reflecting parts or tools such as a screwdriver on the laser beam path Remove all reflecting metals such as watches rings etc before starting service When servicing the equipment with the power turned ON be sure not to touch live sections and rotating operating sections Avoid exposing your eyes to laser beam During servicing be sure to check the rating plate and cautionary labels such as Unplug the power cable during service CAUTION HOT CAUTION HIGH VOLTAGE CAUTION LASER BEAM etc to see if there is any dirt on their surface and if they are properly stuck 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 A 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 b Polygonal mirror One laser beam emitted from the laser diode Laser beam is reflected by this mirror As the
92. TOSHIBA SERVICE MANUAL MULTIFUNCTIONAL DIGITAL SYSTEMS 510010167 207 231 File No SME060037A0 R061121D3500 TTE Trademarks The official name of Windows 95 is Microsoft Windows 95 Operating System The official name of Windows 98 is Microsoft Windows 98 Operating System The official name of Windows Me is Microsoft Windows Millennium Edition Operating System The official name of Windows 2000 is Microsoft Windows 2000 Operating System The official name of Windows XP is Microsoft Windows XP Operating System Microsoft Windows Windows 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 O 2007 TOSHIBA TEC CORPORATION AII rights reserved Under the copyright laws this manual cannot be reproduced in any form without prior written permission of TOSHIBA TEC CORPORATION No patent liability is assumed however with respect to the use ofthe information contained herein GENERAL PRECAUTIONS REGARDING THE SERVICE FOR e STUDIO167 207 237 The installation and service should be done by a qualified service technician 1 Transportation Installation 2 When transporting installing the equipment remove the drawer
93. This guide leads the paper transported from the feeding unit to the transfer section Positive bias voltage is applied to the registration roller and post transfer guide to prevent the transferability from being lowered under conditions such as high humidity Transfer charger The transfer charger applies a charge positive charge which is contrary to the charging polarity of the toner to the back of the paper The toner image is transferred electrostatically on the paper by performing this corona discharge Separation charger After the transfer process the corona discharge applies a negative charge DC on the back of the paper to separate the paper adhering to the drum surface by an electrostatic force 5 Exhaust fan M5 The exhaust fan M5 cools down the inside 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 layer is decreased by the light irradiation and the residual charge on the drum surface is neutralized and eliminated The electrical potential of the drum surface is fixed to a certain amount before the drum is charged 7 Drum thermistor THMS4 The drum
94. Timer v 0 1 759sec Paper E02 gt The copying operation is stopped Paper jam E02 Fig 4 2 mmediately after the power ON Any of all sensors on paper transport path detects paper Paper E03 Front cover is opened during copying 41 registration sensor 54 is not turned ON in fixed period of time when paper is fed out of the ADU 11 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION The ADU sensor on the ADU board does not detect paper a fixed period of time when the paper is transported within the ADU Paper jam E51 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 starts Paper jam E12 E13 E21 E30 and E33 The error code differs depending on the paper source Refer to the error code table in Service Handbook The PFU paper feed sensor is not turned ON in a fixed period of time after the pickup solenoid is turned ON 14 The upper drawer feed sensor is not turned ON in a fixed period of after the paper feed clutch is turned ON when paper is fed out of the 15 36 The lower drawer feed sensor is not turned ON in a fixed period of time after the pa
95. Toner cartridge Fresh toner gt Recovered toner Toner recycling auger Fig 12 2 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved DEVELOPMENT SYSTEM 12 6 12 4 Toner Motor Control Circuit The toner 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 MAIN board 24VCOV OFF 1 ono Toner motor TNRMTON 0 Fig 12 3 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 7 12 5 Auto Toner Circuit 12 5 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 low ered 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 Control panel Indicates toner empty information Recovered toner supply section The main motor supplies the recovered toner to the
96. age processing section Difference between light and dark is Fig 3 5 divided into 256 steps Dark 0 Fig 3 6 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 COPY PROCESS 4 Data writing Data writing is the process of converting the image signals sent from the image processing 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 Image processing LDR board section Polygonal mirror 5 Semiconductive laser element S S Photo conductive drum Fig 3 7 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved COPY PROCESS 5 Development Development is the process of making the electrostatic latent images visible to the eye visible images Developer material is supplied to the photoconductive drum surface by the magnetic roller The toner in the developer material adheres to the areas on the drum surface where the potential is lower than the developer bias which is applied to the magnetic roller reverse development method Drum Magnetic roller Fig 3 8 The potential of the photoconductive 3 drum is higher than the developer bias The potential of the photoconductive drum is lower than
97. al weight of paper guide outside paper Approx 2 65 Ib guide inside and motor unit Power supply DC 24V DC 5V Supplied from the equipment Bundled Unpacking instruction 1 pc Paper guide outside 1 pc Paper guide inside 1 pc Motor unit 1 pc Wire harness 1 pc Screws M3 x 8 5 pcs Screw M3 x 6 1 pc Option Paper feed controller GH 1060 MD 0103 and GH 1060 are to be installed together e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 2 14 2 Construction Automatic Duplexing Unit ADU ADU motor M8 ADU driving PC board ADU ADU sensor Stepping motor Mounted on the ADU driving PC board ADU Upper transport roller Lower transport roller February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 3 14 3 Functions 1 ADU motor M8 This motor drives the ADU transport rollers upper and lower 2 ADU driving PC board ADU The sensor on this board drives the ADU motor and detects paper being transported within the ADU 3 ADU sensor This sensor is mounted on the ADU driving PC board to detect paper being transported within the ADU 4 Upper transport roller Lower transport roller These rollers transport paper within the ADU e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUT
98. an properly contact with the drum surface e Auto toner sensor 56 To print out normal images a constant ratio of the carrier and the toner in the developer material 7 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 toner from the toner cartridge Drum thermistor THMS4 This is installed in the developer unit to detect the ambient temperature of the drum Recovered toner supply mechanism Toner recycling auger The recovered toner transported from the drum cleaner is then transported into the developer unit by the toner recycling auger mounted on the front side of this unit The drive of the toner recycling auger is transmitted from the mixer 3 2 Toner cartridge This is filled with the toner and this supplies the toner to the developer unit by the drive of the toner motor M2 The toner cartridge in this equipment mounts the toner cartridge PC board CTRG and the data identifying recommended TOSHIBA toner cartridges and the counter values determining that the cartridge is nearly empty are written in this board These data are read out by the toner cartridge interface PC board CTIF in this equipment and data related to toner supply are also written in the toner cartridge PC board CTRG The toner cartridge interfa
99. ary 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 11 4 Take off the bypass separation pad while pinching the mounting bracket Note When the separation pad is replaced apply one grain of rice sized white grease to the supporting point D Bypass roller unit 1 Take off the bypass unit 10 10 Bypass unit 2 Remove 2 screws and take off the cover e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 12 A Bypass separation pad Fig 10 12 Bypass separation pad E White grease Fig 10 13 e LENA T all Fig 10 14 February 2007 TOSHIBA TEC CORPORATION All rights reserved 3 Remove 1 spring and 2 screws Then take off the bracket Notes e When installing the bracket engage the U shaped part of each head on both front and rear arms with each protrusion on the bypass roller unit Fig 10 15 When the bracket is removed place it as shown in the figure on the right to prevent the levers from coming off Bracket 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 Bypass roller unit Coupling Fig 10 17 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e
100. aser optical unit Becareful when removing the covers since there might be the parts with very sharp edges underneath When servicing the equipment with the power turned ON be sure not to touch live sections and rotating operating sections Avoid exposing your eyes to laser beam Usedesignated jigs and tools Use recommended measuring instruments or equivalents Return the equipment to the original state and check the operation when the service is finished 3 Important Service Parts for Safety The breaker door switch fuse thermostat thermofuse thermistor batteries IC RAMSs including lithium batteries etc are particularly important for safety Be sure to handle install them properly If these parts are short circuited and their functions become ineffective they may result in fatal accidents such as burnout Do not allow a short circuit or do not use the parts not recommended by Toshiba TEC Corporation 4 Cautionary Labels During servicing be sure to check the rating plate and cautionary labels such as Unplug the power cable during service CAUTION HOT CAUTION HIGH VOLTAGE CAUTION LASER etc to see if there is any dirt on their surface and if they are properly stuck to the equipment 5 Disposal of the Equipment Supplies Packing Materials Used Batteries and IC RAMs Regarding the recovery and disposal of the equipment supplies packing materials used batter ies and IC R
101. ater lamp 0 ON Fig 13 4 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 8 5 Fuser unit error status counter control Toenhance the safety of the fusing section unit SoC provides the following protection When the third C41 error has occurred after two consecutive C41 errors the heater lamp is not turned ON and error C41 is displayed immediately even if an operator turns OFF the power and back ON However if the equipment goes into a ready state normally with the fuser unit error status counter 1 or below the counter is cleared to 0 If the error codes C41 to C45 are displayed and still not cleared even though the thermistor thermostat and heater lamp have been repaired and the power ON OFF does not clear the error check the Setting Mode 08 400 to set the fuser unit error status counter to 0 Remark The fuser unit error status counter Setting Mode 08 400 never has values other than 0 19 fthe heater lamp does not turn ON and the service call C41 is displayed immediately after the power is ON ensure the fuser unit error status counter is 2 or over If it is 2 or over be sure to check the thermistor thermostat and heater lamp Reset the counter to 0 after repair ing them then turn ON the power e If the fuser unit error status counter is 20 or over e g 31 the data in SRAM or SRAM itself may possibly have b
102. cartridge Toner cartridge PC board CTRG Toner cartridge interface PC board CTIF Toner motor M2 Ch 9 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 2 12 3 Functions 12 31 Function of each unit 1 Developer unit Developer material This consists of carrier and toner The carrier is electrically conductive ferrite whose particle size is 30 100 um the toner is resin whose particle size is 5 20 The developer material requires a periodic replacement since it deteriorates with long term use Mixers 1 2 and 3 Mixing the developer material generates a friction of the carrier and the toner The carrier is then positively charged and the toner is negatively charged and the charged carrier and toner adhere on the drum surface by their static electricity The mixer 3 is mounted exclusively for the recovered toner to mix it in a sufficient period of time Developer sleeve Magnet roller This aluminum roller includes a magnet inside The developer sleeve absorbs the developer mate rial using this magnet to form a magnetic brush The magnet is fixed therefore the only sleeve is rotated This rotation makes the magnetic brush of the developer sleeve sweep over the drum sur face and thus development is performed Doctor blade This controls the amount of the developer material transported from the developer sleeve so that the magnetic brush of the developer material c
103. ce PC board CTIF also detects whether the toner cartridge is installed or not 3 Toner motor M2 This drives the toner cartridge with gears February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 3 12 3 2 Functions of the toner cartridge PC board CTRG The toner cartridge in this equipment mounts the toner cartridge PC board CTRG An IC chip is embedded in this board and the data identifying the recommended TOSHIBA toner cartridge and thresholds to determine if the cartridge is nearly empty are written in this chip To measure the amount of toner remaining in the cartridge when the value of counter for period of toner cartridge rotation time 08 1410 is updated this equipment writes the updated value into the toner cartridge PC board CTRG These data written in the toner cartridge PC board CTRG enable the functions below and accordingly this equipment operates as shown below Data reading is performed every time the power of this equip ment is turned ON and the front cover is closed Data read by the toner cartridge PC board CTRG Data to identify recommended TOSHIBA toner cartridges Thresholds to determine if the toner cartridge is nearly empty Value of counter for period of toner cartridge rotation time Functions Cartridge detecting function This function checks whether the toner cartridge is inserted correctly or not and whether the recom mended
104. ce the developer material No frictional electrification occurs on the area where the toner is caked Fig 3 12 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS Magnetic roller Magnetic brush development The 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 Photoconductive drum Magnetic force Magnetic roller line February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 COPY PROCESS Additional Explanation The life of the toner cartridge number of output pages varies depending on the following condi tions Coverage of originals printing image ratio of the original size and density of original background Size and density of originals The 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 using chart A is defined as 100 Output pages
105. ch tion startjob quantity setting accept able Copying Pauses Enters Enters copy into into job inter print job rupting list copy screen Pausing Resume Can Clears Enters Enters copy job scopy cels each into into job copy setting inter print job job rupting list copy screen Download ing firm ware n energy Enters Enters Enters Enters Enters saving low into into into into into power waiting waiting printjob SCAN FAX mode state state list Screen screen screen In sleep Enters Enters Enters Enters Enters Enters Enters Enters Enters mode into into into into into into into into into waiting waiting waiting waiting waiting printjob SCAN FAX waiting state state state state state list screen screen state screen Interrupt Starts Clears Can Can Enters Opera ing copy inter copy cels cels into tion job rupting quantity inter inter print job accept copy rupting rupting list able copy screen Cover open Clears Clears tion quantity setting accept able Toner Opera empty tion accept able Paperjam Service call Note 1 PRINTER button This button is
106. d 3 The output signal from each sensor is input to ASIC on the MAIN board to determine the size of the original A4 Series IFSVAPS LT Series 5V wT APSR H 7A APS C AW Reflection type Reflection type photosensor APS 3 EUR Ww ASIC photosensor APS 2 AW APS 1 i AW 1 Thy __ S6_____ J MAIN board Fig 6 8 February 2007 TOSHIBA TEC CORPORATION All rights reserved 6 13 5VAPS APS R APS C ASIC APS 3 APS 2 SG MAIN board Gi aa a ce e STUDIO167 207 237 SCANNER Sensor detection points A4 Series 5 5 4 APSR APS C A5 R B5 R 5 3 A4 R APSAQ B4 APS 2 O A3 Fig 6 9 LT Series ST LT APS R APS C ST R APS 3 LT R LG LD Fig 6 10 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 14 4 Original size is determined by the combination of the signals output from each detection point Combination charts for size determination of A4 series and LT series are as follows A4 Series Size judgement APS C APS R APS 1 APS 2 APS
107. d Number of sheets 16 or more e STUDIO 167 20 or more e STUDIO207 23 or more e STUDIO237 Reproduction ratio 100 Copy speed for thick paper Copies min e STUDIO167 207 237 Thick 1 81 g m to 105 g m 21 3 Ib Bond to 28 Ib Bond Bypass feed on a sheet by sheet baisis only Thick 2 106 g m to 163 g m 28 Ib Bond to 90 Ib Index Bypass feed on a sheet by sheet baisis only Copy paper Drawer PFU PFP ADU Bypass copy Remarks Size A3 A4 A4 R B5 B5 R to A5 R LD to ST R A5 R Only for PFP LD LG LT LT R FOLIO COMPUTER 13 LG ST R Only for FOLIO COMPUTER 8 5 x 8 5 8K 16K 16K R 13 LG 8K 16K 16K R Non standard or user speci fied sizes can be set Weight 64 to 80 g m 17 Ib Bond to 21 3 Ib Bond 50 to 163 g m Single paper feeding 64 to 80 g m Continuous feeding Special Tracing paper labels OHP film These special papers paper thickness 80 or thicker recommended by Toshiba Tec e First copy time Approx 7 6 sec A4 100 original placed manually e STUDIO167 207 Approx 7 5 sec A4 100 original placed manually e STUDIO237 Approx 7 7 sec LT 100 original placed manually e STUDIO 167 207 Approx 7 5 sec LT 100 original placed manually e STUDIO237 Approx 7 7 sec LT 100 original placed manually e Warming up Approx 25 sec
108. d e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 16 LDR board This is the board on which the laser diode and the ASIC are mounted The laser is emitted based on the image data signal output from the SoC on the MAIN board e SNS board This is the board on which the light sensor for detecting the radiating position of the laser is mounted It outputs the H sync signal to the SoC on the MAIN board e 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 e 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 witch performs optical to electrical conversion to convert the light reflected by the original into the electrical signals It consists of a light source LEDs optical system CCD sensor etc PFC board This is the board to control the optional Automatic Duplexing Unit ADU and optional Paper Feed Pedestal PFP ADU board This is the board to control the optional Automatic Duplexing Unit ADU It detects paper feeding with a sensor mounted on the ADU board February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 17 2 5 Disassembly and Replacement o
109. d and operator s instructions on copy that number indicates the set quan ing conditions can be input tity Returns to the default condition if The set quantity can be cleared to no key is pressed for the setting 1 by pressing the CLEAR STOP time of auto clear timer key Bypass copying is possible 3 COPYING Now copying e After completion of copying the e Displayed by pressing the START copy quantity indicator returns to key the initially set number Copy quantity indicator becomes ex 3o 2 1 3 and copying is completed 4 Saving energy Energy saver conditions Reset by pressing the any key except the ENERGY SAVER key 5 Select original size Platen sort copying standby state When using original cover 6 Timer off No message is displayed in the dis play panel 7 Cassette empty Indication of lack of paper e Supply paper to the selected cas Indicates when there is no paper in sette cassette Select another cassette Bypass copying is possible 8 Toner empty Indication of lack of toner Reset after the toner is supplied The toner in the toner cartridge and the front cover is closed becomes empty When this message is displayed it is not possible to copy 9 Misfeed in bypass Bypass paper jamming SFB The machine returns to normal condi Paper jams at the bypass tray tions automatically when the paper out is pulled from the bypass tray 10 Misfeed in copier Paper jammed in the machine Remove the paper jammed
110. d with the Automatic Document Feeder Original is transported on the ADF original glass by the Automatic Document Feeder and the trans ported original is read under the ADF original glass by the CIS Do not use such solvents as alcohol when cleaning the surface of the ADF original glass because it is coated so as not to be scratched by originals CIS unit CIS The CIS unit CIS is a sensor unit which consists of an LED array lens array and CCD sensor array of the same length as that of the original width in the primary scanning direction closely attached and unified The original is irradiated at one time with the LED light source which consists of LEDs of RGB oolors one for each color light guiding tube to lead each light to the original and a YG LED array and then the reflected light is scanned by the CCD sensor 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 are processed only by the CIS unit The CIS has characteristics of shallow depth of focus and high light sensitivity Micro lens array ADF original glass Shading correction plate CIS unit Original glass
111. developer unit from the recovered toner sup ply mechanism Control section Control panel MAIN board Toner Empty Flash ROM Temperature humidity sensor Developer unit Recovered toner supply section Toner cartridge Recovered toner upply mechanism Recovered D A converter Toner density signal Auto toner sensor Control voltage signal AID Developer material converter Fig 12 4 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 8 12 5 2 Function of auto toner sensor 1 Function Initialization adjustment function At the first use of the equipment or when the developer mate rial is replaced with a new one Automatically adjusts the output value of the auto toner sensor responding to humidity input value to the A D converter for the toner density of the new developer material so that it stays in range of 2 34 to 2 46 V Stabilizing the toner density During the printing operation 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 Det
112. dge circuit method Toner supply Toner cartridge e Toner empty detection Density detection method Toner T 2320 T 2320E T 2320D T 2320C T 1640 T 1640E T 1640D T 1640C T 1640T Developer material D 2320 D 2320C Developer bias DC 357 V Adjustable output DC 340 V Adjustment output during during printing printing AC 1100 V Adjustment not required during printing No positive output Transfer Transfer bias Adjustable output Constant current 600 V Adjustment not required c 565 V Adjustment not required Turned ON OFF by thermistor 6 Separation Adjustable output Constant current 7 Discharge Discharging position Exposure after cleaning Discharge LED Red LED 8 Cleaning Method Cleaning blade e Recovered toner Reuse There is the recovered toner supply mechanism 9 Fusing Method Long life fuser roller method Fuser roller Thin roller coated with fluoroplastic 230 Pressure roller Pressure roller PFA tube roller 230 PFA tube roller 225 Cleaning Cleaning roller for pressure roller 216 None Heater Heater lamp e STUDIO167 207 237 COPY PROCESS February 2007 TOSHIBA TEC CORPORATION All rights reserved 3 13 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved COPY PROCESS 3 14 4 GENERAL OPERATION 4 1 Overview of Operation Operation o
113. driving force of the main motor is transmit ted to the drawer pickup clutch to rotate the pickup roller 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 When the bypass pickup solenoid SOL2 is turned ON the bypass pickup clutch arm and bypass feed clutch arm are pulled away from each clutch The driving force of the main motor M3 is transmitted to the bypass pickup clutch and bypass feed clutch to rotate the bypass pickup roller and bypass feed roller At this time the bypass pickup roller rotates and goes down simultaneously Feeding starts and a sheet of paper is 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 bypass pickup solenoid SOL2 is turned OFF and the bypass pickup clutch arm and bypass feed clutch arm come in contact with each clutch The drive for the bypass pickup roller and bypass feed roller is cut off and the bypass pickup roller unit is lifted up The registration clutch CLT1 is turned ON and the paper aligned by the registration rol
114. e areas retains the negative charge As this image on the drum formed by the negative potential is not visible it is called an electrostatic latent image V Surface potential 500 White area of original Discharge Charging process Electric potential of the photoconductive drum Fig 3 3 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved COPY PROCESS 2 Charging Charging is the process to apply charge evenly on the drum surface The needle electrode produces negative corona discharge is controlled by the grid allowing the drum surface to be evenly charged with the negative potential The surface potential on the drum is determined by the grid potential and is controlled to a certain value by the grid control circuit Main charger High voltage za Grid control circuit transformer 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 EN 5 5 Light Value of image CIS receiving signals to be amount output Light 255 Im
115. e sure that the side seal comes between the developer unit upper cover and rubber seal on the cover Rubber seal Developer unit upper 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 12 C Filling developer unit with developer material 1 Rotate the gear on the rear side of the devel oper unit to the direction of the arrow while Lid 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 D Auto toner sensor S6 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 Connector Auto toner sensor February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 13 E Drum thermistor 54 1 Remove the developer material P 12 12 B Developer material Drum thermistor 2 Disconnect 1 connector remove 1 screw and take off the drum thermistor
116. echanical one way clutch used to transmit the drive from the main motor M3 to the cam which moves the bypass pickup roller up and down When the bypass pickup solenoid SOL2 is turned OFF the spring tension of the one way clutch decreases so that the bypass pickup roller moves to the upper position standby position and moves to the lower position operation position when the solenoid is turned ON February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 3 11 Bypass feed clutch This is a spring type mechanical one way clutch used to transmit the drive from the main motor M3 to the bypass feed roller and bypass pickup roller When the bypass pickup solenoid SOL2 is turned OFF the spring tension of the one way clutch decreases to cut off the drive 12 Registration roller Paper transported from the pickup roller or bypass feed roller is pushed against the registration roller which aligns the leading edge of the paper 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 of the paper has reached the registration roller and to con t
117. ection this equipment uses a CIS Contact Image Sensor for scanning the image The surface of an original is irradiated with light from the 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 Original glass Original glass ADF original glass CIS unit CIS unit Automatic original detection sensor Automatic original detection sensor Damp heater Damp heater A4 series LT series Fig 6 1 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 SCANNER 6 2 Construction Scanning section Original glass Original glass ADF Original glass CIS unit CIS CCD YG LED array RGB light guiding tube Rod lens array Drive section Scan motor M1 Automatic original detection sen sor S9 S13 CIS home position sensor S1 Others Damp heater DH1 DH2 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 3 Functions 1 Original glass 2 This is a glass for placing original Original image placed on the original glass is scanned by the CIS The ADF original glass is used when original is rea
118. ects that there is no toner in the toner cartridge The toner motor is driven The auto toner sensor output does not change The toner density does not change gt It is determined there is no toner the cartridge toner empty Recovering from the toner empty state The toner motor is driven Toner is supplied from toner cartridge The auto toner sensor output changes The toner density returns to normal value The toner empty state is cleared February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 9 2 Function of auto toner sensor The auto toner sensor consists of the following circuits Drive winding A magnetic head primary side with a high frequency magnetic field which forms a magnetic cir cuit in the developer material Detection winding 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 Developer material DC Auto toner sensor i Drive Detection output To the A D converter Magnetic resistance winding winding m UE MAIN board i ATS 1A Magnetic circuit Fig 12 5 When the toner density is low The ratio of the toner against the carrier in the developer material dec
119. ed by the DC output circuit For details of the high volt age output circuit see the following P 11 5 11 4 High Voltage Output Control Circuit 4 Heater lamp control circuit TRC Triac is driven by the heater control signal HTON1B HTON2B from the MAIN board and then AC power is supplied to each heater lamp center and side in the fuser unit For details of the heater lamp control circuit see the following P 13 6 13 5 Fuser Unit Control Circuit February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 POWER SUPPLY UNIT 15 1 15 2 Operation of DC Output Circuit 1 Starting line output When the power of the equipment is turned ON all the voltages start being supplied However they start being supplied only when both the front cover and the ADU cover are closed 2 Stopping line output When the power of the equipment is turned OFF the power OFF PWRDWN 1 signal is output after the end of the instantaneous outage insurance time 20 ms or more and then the supply of each voltage stops If the supply of voltage of the 5VB line 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 c
120. een ruined due to causes such as leakage from the chargers Check the bias high voltage transformers and charge wires to see if any of them is defective and also look through all the data in the SRAM When the thermistors detect overheating the SoC decides the error code and counter value of the fuser unit error status and turns OFF each output the heater lamp control panel dis play motors and so on to protect the fuser unit Error code C44 CLEAR STOP and 8 Counter value of the fuser unit error 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 the heater lamp is automatically turned OFF again when the surface temperature of the fuser roller is still higher than the abnormal temperature detected Wait until the surface temperature of the fuser roller is lowered enough and turn ON the power to check the counter value After confirming that it is the fuser unit abnormality correct the abnormality and reset the counter value 08 400 to 0 to start up the equipment normally February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 9 6 Temperature detection configuration Thermistor is a device whose resistance decreases as it detects a higher temperature Thus its input voltage to A D converter changes and then SoC judges whether this change is normal o
121. elow time Detecting 100 C 1 100 C or below Specified C44 100 below time 2 40 C or below 150 C or above On usual C43 150 C or above 40 C or below Detecting warm 1 Warming up temp Specified C44 ing up tempera or below time ture 3 Warming up temp or below 2 40 C or below 150 C or above On usual C43 150 C or above 40 C or below 150 C or above 40 C or below During ready sta 1 40 C or below 150 C or above On usual C43 tus 150 C or above 40 C or below 150 C or above 40 C or below 2 40 C or below C44 40 C or below During copying 40 or below On usual C44 40 C or below 2 40 C or below C45 February 2007 TOSHIBA TEC CORPORATION All rights reserved 13 11 The figures in the priority section denote the priority of error checking e STUDIO167 207 237 FUSER EXIT UNIT 13 6 Disassembly and Replacement A Fuser Exit unit 1 Take off the right rear cover P 2 22 Right rear cover 2 Lay down the transfer unit 3 Disconnect 3 connectors remove 2 screws and then take off the fuser paper exit unit Note Be careful because the fuser paper exit unit is hot B Pressure roller unit Fuser roller unit 1 Take off the fuser paper exit unit P 13 12 A Fuser Exit unit 2 Remove 1 spring and 2 screws 3 Separate the pressure roller unit from the fuser roller unit Note If the ADU optional is insta
122. employ two persons and be sure to hold the positions as shown in the figure The equipment is quite heavy and weighs approximately 32 5 kg 71 65 Ib therefore pay full attention when handling it Be sure not to hold the movable parts or units when transporting the equipment Be sure to use a dedicated outlet with AC 110 V 13 2 A 115 V or 127 V 12 A 220 240 V or 240 V 8 Afor 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 copying operation keep a minimum clearance of 80 cm 32 on the left 80 cm 32 on the right and 10 cm 4 on the rear The equipment shall be installed near the socket outlet and shall be easily accessible Be sure to fix and plug in the power cable securely after the installation so that no one trips over it General Precautions at Service Be sure to turn the power OFF and unplug the power cable during service except for the service should be done with the power turned ON Unplug the power cable and clean the area around the prongs of the plug and socket outlet once a year or more A fire may occur when dust lies on this area When the parts are disassembled reassembly is the reverse of disassembly unless otherwise noted in this
123. er pickup clutch adjust the position of the hook of the spring and the covers so that the stopper of the cover B and the center of the rib of the are aligned Cover B Fig 10 44 P Registration roller rubber 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 Wash Gear D EA E ring Washer Pin Registration roller rubber Fig 10 46 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 24 0 Registration roller metal 1 Take off the Process unit P 11 9 A Process unit 2 Take off the transfer unit P 11 17 N Transfer unit 3 Take off the registration roller clutch P 10 21 M Registration roller clutch CLT1 4 Remove 1 clip 1 bushing and then take off the registration roller metal while sliding it to the rear side 2222 Registration roller metal Fig 10 47 5 Remove 1 bushing 1 E ring and then take off 1 gear and 1 pin E ring A Gear s et lt Bushing Pin Registration roller metal Fig 10 48 R Feed gear unit 1 Take off the main motor drive unit P 9
124. f Covers A Front cover 1 Open the front cover 2 Release the upper hinge 3 Take off the front cover while lifting it up B Inner tray 1 Remove 2 screws and take off the Inner tray Inner tray Fig 2 13 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 18 C Left cover 1 Take off the Inner tray P 2 18 B Inner tray 2 Remove 4 screws and take off the left cover Left cover Fig 2 14 D Tray rear cover 1 Take off the left cover P 2 19 C Left cover 2 Take off the tray rear cover EN Tray rear cover Fig 2 15 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 19 E Front right cover 1 Take off the front cover co P 2 18 A Front cover Mo Front right cover 2 Pull out the toner cartridge 3 Open the ADU cover RECA 4 Remove 2 screws and take off the front right l cover Fig 2 16 F Front upper cover 1 Remove 1 screw and take off the front upper cover e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 20 G ADU cover 1 Open the bypass tray 2 Open the ADU cover 3 Open the transfer unit
125. f equipment Operation during initializing pre running and ready r Drawer feed copying by START button Copying operation Bypass feed copying Interrupt copying February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 GENERAL OPERATION 4 2 Description of Operation 4 2 1 Warming up 1 Initialization Power ON Heater lamp ON Please wait is displayed Fan motors gt Initialization of scanning system The CIS unit moves to the home position The CIS unit moves to the peak detection position The LED of CIS is turned ON Peak detection white color is detected by the shading correction plate The LED of CIS is turned OFF The CIS unit moves to the home position READY WARMING UP is displayed 2 Pre running operation Only when the temperature is at 16 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 surface temperature of the fuser roller becomes sufficient for fusing READY is displayed 4 2 2 Ready state ready for copying Buttons on the control panel enabled When no button is pressed for a certain period of time Set number 1 is displayed Equipment returns to the normal ready state e STU
126. f the outside air taken into the equipment are detected Based on the result of the detection this circuit 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 the SoC The higher the temperature or the humidity is the higher the output voltage of this sensor becomes MAIN board 5V Temperature humidity sensor Digital AID data converter e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 8 11 7 Disassembly and Replacement A Process unit 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 Process unit Fig 11 6 except for MJD Process unit Fig 11 7 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 9 07 03 B Drum cleaner unit 1 Take out the
127. fuser roller In case 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 these control circuits do not func tion with thermistor abnormality or other reasons and the fuser roller is abnormally overheated as the result thermostat shut off the power supply to the heater lamps to protect the equipment Fuser unit Switching regulator Fuser thermostat Center heater lamp control circuit TRC1 O Side heater lamp control circuit TRC2 Edge A thermistor 777 Main switch Center thermistor thermistor Center heater lamp control signal A D converter Side heater lamp control signal AC line DCline Forcible power off Relay OFF signal circuit MAIN board Fig 13 2 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 6 13 5 2 Temperature detection section To maintain the surface temperature of the fuser roller at a certain level 3 ther
128. g 2 6 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE E Driving section CLT1 Fig 2 7 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE F Drawer section SW5 Fig 2 8 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE G Bypass unit automatic duplexing unit M8 ADU Fig 2 9 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 10 2 3 Symbols and Functions of Various Components The column shows the page and item number in the parts list 1 Motors Symbol Name Function Remarks 1 SCAN MOT Driving the CIS Fig 2 3 10 1 Scan motor M2 TNR MOT Supplying the toner Fig 2 5 12 15 Toner motor M3 MAIN MOT Driving the drum developer unit regis Fig 2 7 12 2 Main motor tration roller Pickup roller feed roller cleaner unit M4 M DC POL Driving the polygonal mirror Fig 2 5 5 13 Polygonal motor M5 EXT FAN MOT Exhausting ozone and cooling down Fig 2 6 11 23 Exhaust fan the equipment inside M6 PS FAN MOT Cooling down the switching regulator Fig 2 4 5 11 Switching regulator cooling fan M7 EXIT MOT Driving the fuser unit and exit roller Fig 2 5 MD 0103 Exit motor Option 2 2
129. gulator Low voltage section HVMVR 1 Digital data D A HVDTR 1 converter HADR HVSAV 1 High voltage section Charger bias Analog data ference voltage Vc Needle electrode Needle electrode bias Grid bias Grid Adjustment value me Flash ROM Developer bia Developer AC Magnetic roller Developer DC HVTM 0 HVTAC 0 2 Transfer charger HVTT 0 HVTSP 0 Separation Separation charger HVTGB 0 HVSDWN 0 Transfer guide Transfer guide bias Leakage detection Fig 11 3 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 5 11 4 2 Description of Operation The function and operation of each signal are as follows ON OFF signals HVTM 0 0 HVTT 0 HVTSP 0 HVTGB 0 These are for the charge grid needle electrode grid developer bias AC transfer charger transfer guide bias and separation charger When these signals become L level the generation circuit of each bias on the switching regulator is turned ON to generate an output current voltage The negative DC component of the developer bias is turned ON OFF by switching the reference voltage HVDTR 0 separately The positive DC component of the developer bias is outpu
130. harger Fig 3 16 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 COPY PROCESS 7 Separation Separation is the process of separating paper which is temporarily adhering to the drum due to the static electricity during the transfer process 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 Drum rotation Separation charger Direction of transportation Fig 3 17 Output is controlled as follows to realizes the desirable separability Paper position against transfer point Separation output From leading edge to 11mm from leading edge 107 pADC From 11mm from leading edge to 46mm from leading edge L 70 From 46mm from leading edge to 48mm from trailing edge C 107 pADC From 48mm from trailing edge to trailing edge L 70 uADC Paper may not be separated from the drum surface because of moisture or malfunction of the transfer separation charger during printing As the result the paper enters into the cleaner and causes jamming To prevent this a separation finger is used to forcibly separate the paper which was left around the drum Separation finger qu movement Drum rotation
131. he photoconductive drum before the next charging process If the residual charge is not eliminated the following phenomenon occurs Negative charge remaining on the photoconduc tive drum surface causes ungiven application of the charge for the next printing Discharge LED Photoconductive The next print will have a double image The arum preceding image appears Q Solution The entire surface of the photoconductive drum is illuminated with light by the discharge LED array Ground Fig 3 22 The photoconductive drum becomes electri cally conductive All of the negative charge remaining the pho toconductive drum is conducted to the ground Preparation for next printing is completed e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 3 12 3 3 Comparison with e STUDIO230 280 T 2320T AC 1100 V Adjustment not required during printing DC 150 V Fixed others Process e STUDIO230 280 e STUDIO167 207 237 1 Photoconductive drum OD 1600 230 Sensitivity Highly sensitized durable drum e Surface potential 475 440 V 2 Charging Scorotron method Grid voltage 495 V 448 V e STUDIO167 207 454 V e STUDIO237 3 Data writing Light source Semiconductor laser Adjustment not required Light amount 4 0 nJ mm 4 Development Magnetic roller One magnetic roller e Auto toner Magnetic bri
132. he registration sensor S4 within a specified period of time or not is substituted for the paper jam detection Pickup clutch LS AQ 2 Pickup solenoid Pickup roller Fig 10 2 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 5 B Paper separation This model is equipped with separation claws which work to prevent multiple paper feeding Two sepa ration claws are installed to hold the 2 corners of the leading edge of the paper in the drawer When feeding starts the pickup roller rotates Since the friction between the pickup 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 from the claws The sheet released from the separation claws is directly transported to the registration roller by the pickup roller Pickup clutch Separation claw Pickup roller Fig 10 3 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved PAPER FEEDING SYSTEM 10 6 10 4 2 Bypass tray A Operation of drawer pickup roller When the paper is set on the bypass tray the bypass
133. ig 5 5 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 CONTROL PANEL 5 4 2 LED display circuit Example Lighting circuit method of TEXT PHOTO lamp 5V Low o TEXT PHOTO lamp Curent LED27 LEDM24 o Fig 5 6 FET Q1 is turned ON when the FET control signal becomes L level Then when the control signal LEDM24 of the LED driver changes to L level the current flows to the cover open lamp LED27 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 LED anode is ON 2 The cathode side of the LED is L level e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 5 5 Disassembly and Replacement A Control panel unit 1 Remove 3 screws Fig 5 7 2 Take off the control panel unit while lifting it up Connector 3 Disconnect 2 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 Control panel unit Fig 5 8 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 CONTROL PANEL B Control panel PC board HPNL 1 Take off the control panel unit P 5 7 A Control panel unit 2 Remove 2 screws and take off the cover while sliding i
134. ights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 8 Timing chart for duplex copying from upper drawer A4 4 sheets 20 8 295 yun 7906 969 267 Josues uoinjo Josuas Josues Fig 14 5 e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 February 2007 TOSHIBA TEC CORPORATION All rights reserved 14 9 Timing chart for duplex copying from upper drawer A3 1 sheet sec unit 14 60 c 5 c c c D o 9 EE a xs S23 lt E 5 2 2 oc Fig 14 6 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 10 14 6 Flow Chart Exit motor reverse rotation ON Specified time has passed Specified time has passed ADU motor ON ADU paper feeding command signal YES ADU feeding operation started Registration sensor Registration in process ADU misfeeding E11 Registration process completed ADU motor stopped Next paper is ready for the registration Fig 14 7 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 11 14 7 Disassembly and Replacement A Automatic Du
135. iginal can be reproduced appropriately By using this function it is possible to cut the background density down when copying originals which have a certain level of background density such as newspa pers Example Dynamic range Extended dynamic range i width 1 width gt adjustment Back ground lt Smaller lt No of pixels gt Larger Smaller lt No of pixels Larger lt lt Lower Density Higher Lower Density Higher Histogram Fig 7 3 Filtering This function is enabled by low pass filter processing and high pass filter processing Low pass filter processing This processing removes image electrical noise and decreases moire by performing averaging operation between the image signals of the 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 and b respectively X is converted to X through the low pass filtering When the matrix is 3 x 1 _ agb The above averaging operation is performed for all the pixels to accomplish the high reproducibil ity of original e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION rights reserved IMAGE PROCESSING The following is the case that the low pass filtering is applied on the primar
136. ircuit a fuse and internal protection circuit This is to prevent defects damage or abnormal operation of the secondary cir cuit which may be caused by an overcurrent due to a short circuit or an overvoltage resulting from short circuiting between different voltages If the protection circuit is activated except when the fuse is blown repair the causes such as short circuiting Turn ON the power again 1 minute later to clear the overcurrent protection e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 15 2 15 3 Output Channel The following are 6 output channels for the main switch line 1 5V 5V CN104 3 Output to the MAIN board 5V CN112 Pins 3 and 4 Output to the PFC board ADU via PFC board PFP via PFC board 5VB CN104 8 Output to the FUS board 5VB CN104 Pins 9 and 10 Output to the MAIN board 2 12V 12V CN110 3 Output to the FAX unit 3 12V 12V CN104 2 Output to the control panel via MAIN board 12V CN110 2 Output to the FAX unit 4 24V 24V CN104 Pins 19 and 20 Output to the MAIN board PFU via MAIN board 24V CN112 Pins 1 and 2 Output to the PFC board ADU via PFC board PFP via PFC board 24VDF CN104 Pins 17 and 18 Output to the RADF ADF via MAIN board The following is an output channel for the cover switch line 1 24V 24VCOV OFF 104 Pins 23 and 24 Output to the MAIN board Febr
137. isconnect 1 connector and remove 1 screw for each APS sensor Take off 4 APS sen sors Note When installing the automatic original detec tion sensor connect the connector yellow to the connect one Exc AT J e 7 e C S _ Connector Yellow Fig 6 18 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 19 D Scan motor M1 1 Take off the scanner top cover P 6 18 B Scanner top cover 2 Disconnect 1 connector Connector Fig 6 19 3 Remove 2 screws and take off the scan motor Scan motor 1 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION rights reserved SCANNER 6 20 Notes When installing the scan motor be sure to A B adjust the tension of the belt using the belt tension jig Also be sure to take off the right rear cover when performing the adjustment GQ P 2 22 I Right rear cover The adjustment procedure is as follows 1 Temporarily fix screw A and B Scan motor Fig 6 21 2 Hook the belt tension jig to the motor bracket and frame Scan motor 3 The scan motor is pulled by the belt tension jig Fix screw A and then B at the stopped position 4 Remove the belt tension jig Belt tension jig Fig
138. itching regulator cooling fan 2 Disconnect 1 connector and take off the switching regulator cooling fan while sliding it upward Fig 2 36 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 28 27 Removal and Installation of Options A MR 2017 Automatic Document Feeder ADF MR 3019 Reversing Automatic Document Feeder RADF 1 Turn the power OFF and unplug the power cable 2 Remove 1 screw and take off the connector cover 3 Remove the ground wire 4 Disconnect the connector Fig 2 39 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 29 5 Remove 1 screw on the rear right side Fig 2 40 6 Remove 1 screw and 1 washer on the rear left side 7 Open the ADF RADF Fig 2 42 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 30 8 Remove 2 screws on the front side Fig 2 43 9 Slide the ADF RADF backward and take off by lifting it up B MY 1027 Paper Feed Unit PFU B 1 When PFP is not installed 1 Turn the power OFF and unplug the power cable 2 Remove 1 screw and take off the PFU con nector cover February 2007 TOSHIBA TEC CORPORATI
139. lat harness to the MAIN board with its erectrode side down An error CA2 will be displayed if the connection is incor rect Connector 3 Take off the switching regulator unit P 2 26 E Switching regulator unit PS 4 Remove 1 screw 5 Pull out the laser optical unit while lifting it up and take it off Laser optical unit Fig 8 11 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 LASER OPTICAL UNIT e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 9 DRIVE UNIT 9 1 General Description The main motor drives the drum developer unit cleaner unit fuser unit and transport rollers which transport paper bypass feed roller bypass pickup roller registration roller and pickup roller The main motor M3 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 M3 to each unit The toner motor M2 which drives the toner cartridge is also installed in the drive unit The exit roller is driven by the main motor M3 However when the automatic duplexing unit ADU optional is installed it is driven by the exit motor M7 Exit motor Exit roller Drive unit Fuser roller Toner motor Toner recovery auger
140. lenoid 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 Bypass pickup solenoid Fig 10 24 I Bypass pickup clutch Bypass feed clutch 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 E ring Bushing Fig 10 25 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 16 3 Take off the bypass pickup clutch with its shaft Bypass pickup clutch Fig 10 26 4 Remove 2 E rings Then remove the gear cover spring and cam out of the shaft Cam E ring ex M E ring Hook 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 Cover the cover and the center of the cam are aligned Cam Spring Fig 10 28 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 17 5 Remove 1 E ring and take off the bypass feed clutch Bypass feed clutch Fig 10 29 6 Remove the gear cover spring and cap Cap Cover AS Spring Gear Fig 10 30 e STUDIO167 207 237 February 2007 TOSHIBA
141. ler metal P 10 25 Q Registration roller metal Remove 1 screw 4 5 6 Take off the registration guide while 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 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 then take off the registration guide February 2007 TOSHIBA TEC CORPORATION All rights reserved Drawer detection switch bracket Fig 10 54 9 Registration guide Fig 10 55 e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 27 9 Remove the seal release 2 latches and take off the registration sensor Registration sensor Seal Fig 10 56 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 28 11 DRUM RELATED SECTION 11 1 General Description This chapter explains about the area around the drum drum itself image processing their parts and control circuits Cleaning blade Discharge LED Main charger Drum thermistor Toner recovery auger Recovery blade Post Transfer guide Exhaust fan
142. ler is trans ported to the transfer unit February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 PAPER FEEDING SYSTEM 10 9 10 5 Disassembly and Replacement A Bypass unit 1 Take off the ADU cover P 2 21 G ADU cover 2 Remove 1 screw and take off the harness 3 Release the harness from the harness clamp and disconnect 1 connectors 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 e STUDIO167 207 237 PAPER FEEDING SYSTEM NS OS 5 Y A YA 2 1 4 gt Harness cover Connector Fig 10 7 Screw Bypass unit Fig 10 8 February 2007 TOSHIBA TEC CORPORATION All rights reserved 10 10 B Bypass tray 1 Take off the bypass unit 10 10 Bypass unit 2 Release each latch to take off the front and M rear tray arms 3 Take off the bypass tray Bypass tray Fig 10 9 C Bypass separation pad GI 1 Take off the bypass unit 10 10 Bypass unit 2 Remove 2 screws and take off the bypass separation pad unit 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 Cover Fig 10 11 Febru
143. ll for service CA2 Remaining set Remaining set number 0 YES Laser OFF Processing system control completed February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 GENERAL OPERATION Scanning system control completed detected leading edge of paper Paper jam Fig 4 5 4 13 detected trailing edge of paper E02 Polygonal motor OFF Main charger OFF Discharge LED OFF Developer bias OFF Exit motor OFF Drum rotation reversed Main motor OFF READY Fig 4 6 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 4 14 5 CONTROL PANEL 5 1 General Description The control panel consists of button switches to operate the equipment and select various modes and LEDs and an LCD to display codes values and the states including each mode of the equipment The button switches the LEDs and an LCD are mounted on the control panel PC board HPNL and are installed the inside of the control panel When the operator s attention is required graphic symbols appear with messages explaining the condi tion of the equipment in the LCD panel ENERGY USER SAVER INTERRUPT FUNCTIONS SCAN PRINTER COPY S FAX uj 9 SETTINGS
144. lled the spring has already been removed Note Separate the pressure roller and the heat roller while pressing the thermistor ground leaf spring e STUDIO167 207 237 FUSER EXIT UNIT 13 12 Stepped screw Fuser Paper exit unit Fig 13 6 Pressure roller unit Fuser roller unit Thermistor ground leaf spring Fig 13 8 February 2007 TOSHIBA TEC CORPORATION All rights reserved C Exit roller 1 Take off the fuser roller unit P 13 12 B Pressure roller unit Fuser roller unit 2 Release the latch and take off the gear A 3 Take off the gear B 4 Remove the bracket February 2007 TOSHIBA TEC CORPORATION All rights reserved 13 Fig 13 9 Fig 13 10 Bracket 13 Fig 13 11 e STUDIO167 207 237 FUSER EXIT UNIT 5 Remove 1 clip 1 bushing 6 Take off the exit roller by sliding it to the rear side Exit roller Fig 13 12 D Exit sensor S5 1 Take off the fuser paper exit unit P 13 12 A Fuser Exit unit 2 Release the stopper using a flathead screw driver 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATI
145. mistors center side and edge detect the surface temperature of the fuser roller to turn ON OFF and control 2 heater lamps center and side 1 Relation between the thermistor output voltage and surface temperature of the fuser roller Output voltages of thermistors V Surface temperatures of fuser roller C Approx 0 5 40 Approx 1 9 100 Approx 3 7 170 2 Control of the surface temperature of the fuser roller Warming up Ready 170 C During printing 170 C Deed 170 Temperature of fuser roller Heater lamp ON OFF Fig 13 3 Remark During warming up 2 heater lamps center and side are turned ON to raise the surface temper ature of the fuser roller During ready and printing status each heater lamp is turned 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 reason the edge thermistor detects the temperature of the end of the fuser roller When this thermistor detects the abnormal temperature Approx 235 C the heater lamp is turned OFF regardless of the temperature of the area where the paper passes on
146. motor drive circuit is automatically reset when the power is turned ON Voltage to set value for the SCNNVR Input Sets the reference current value for the constant current motor current detection Motor wire current value can be set in the range of 0 to 2 0 A phase by applying the analog voltage of 0 to 5 V February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 5 Contact Image Sensor Unit Control Circuit 6 5 1 Exposure LED control circuit The cell guide mounted on the contact image sensor CIS unit is the main light source of the red green blue LEDs and is used to expose originals Also mounted is the LED array which is the subsidiary light source of the yellow green LEDs Turning each light source ON OFF is controlled by the control signal SCNLEDR G B ASTOFF 1 out put from the ASIC on the MAIN board According to the amount of each light source white standard 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 source is not changed because it is the standard value of the adjustment The other light amount is changed ba
147. nd 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 equal This will make the main motor rotate at a constant speed Lock range 8 When the motor is in the lock range the excitation phase switching section outputs the MMTRPLL 1 signal in the L level to the ASIC 9 When MMTRBK O signal from the ASIC becomes L level the motor is braked When the 0 signal becomes H level the motor is stopped e STUDIO167 207 237 DRIVE UNIT February 2007 TOSHIBA TEC CORPORATION All rights reserved Control signal of main motor MMTR 0 signal This signal switches the ON OFF of the main motor When this signal becomes L level the motor starts rotating and when it becomes H level the motor stops MMTRCCW 1 signal This signal switches the rotation direction of the main motor When this signal becomes L level the motor rotates clockwise seen from 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 agai
148. nst the reference clock is within 6 25 this is defined as a lock range the normal rotation of the motor in the main motor When it is within this range this signal becomes L level MMTRBK O signal This signal applies a brake on the main motor When this signal becomes L level a brake is applied to the rotation of the motor February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DRIVE UNIT 9 5 A Main motor M3 1 Take off the rear cover P 2 22 J Rear cover 2 Disconnect 1 connector remove 2 screws and then take off the main motor B Toner motor M2 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 e STUDIO167 207 237 DRIVE UNIT Disassembly and Replacement Connector m di T Main motor Fig 9 3 Tonner motor Connector February 2007 TOSHIBA TEC CORPORATION All rights reserved 3 Remove 2 screws and take off the toner motor C Main motor drive unit 1 Take off the Process unit P 11 9 A Process 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 wi
149. nter thermistor Side thermistor Edge thermistor THMS1 THMS2 THMS3 1 Take off the fuser roller P 13 18 G Fuser roller 2 Remove each 1 screw of the thermistors and then take off each thermistor by releas ing its harness out of the harness clamp e STUDIO167 207 237 FUSER EXIT UNIT 13 20 Fig 13 31 February 2007 TOSHIBA TEC CORPORATION All rights reserved 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 J Fuser thermostat THMO1 Take off the fuser roller P 13 18 G Fuser roller Remove 2 screws and take off the fuser ther mostat 1 2 Exit motor M7 Option Take off the rear cover P 2 22 J Rear cover Disconnect 1 connector remove 1 screw and then take off the exit motor with the bracket while sliding it toward the right 1 2 Edge thermistor Side thermistor Center thermistor Fig 13 32 Fuser thermostat February 2007 TOSHIBA TEC CORPORATION All rights reserved 13 21 Fig 13 33 Connector Exit motor Screw Fig 13 34 e STUDIO167 207 237 FUSER EXIT UNIT 3 Release the harness from harness clamp remove 2 screws and then takeoff the exit Exit motor motor Bracket Fig 13
150. ocedure below Place the flat harness along the edge of the scanner base Align the seal with the two edges of the scanner base Harness Fig 6 29 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER 6 23 4 Liftup 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 Besure to perform 05 310 with the platen cover or the ADF RADF closed after replacing the CIS unit Connector Fig 6 30 5 Release 2 latches each to take off 2 original glass guides from the CIS unit Original glass guide Fig 6 31 H CIS case 1 Take off the CIS unit P 6 23 G CIS unit CIS Belt stopper 2 Remove 1 screw and take off the belt stop per Note When installing the belt stopper install it so that the protrusion of the stopper fits in the V groove on the inside of the CIS unit drive belt 1 CIS unit drive belt 1 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 3 Take off the CIS case 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
151. ocus lens are focused on the drum surface Laser precautions A laser diode is used for this equipment and radiates an invisible laser beam 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 performed the laser beam is not leaked and you are in no danger of being exposed to laser radiation The following cautionary label for the laser is attached to the front right cover inside of the front FERR KFLIAA YhEALEWHPIR y t72A43BOmTHIL BHOBNG C AOBIEXETEUC DANGER CLASS 3B INVISIBLE LASER RADIATION WHEN OPTICAL UNIT OPEN OR DRUM UNIT REMOVED AND INTERLOCK DEFEATED AVOID DIRECT M EXPOSURE TO VORSICHT KLASSE 38 DANGER CLASSE 3B RAYON LASER UNSICHTBARE LASERSTRAHLUNG INVISIBLE LORSQUE LE BLOC OPTIQUE WENN DIE ABDECKUNG GEOFFNET EST OUVERT LE TAMBOUR RETIRE ET LE ODER DIE TROMMEL VERROUILLAGE HORS D USAGE EVITER ENTFERNT UND DIE L EXPOSITION DIRECTE AU RAYON VERRIEGELUNG PELIGRO RADIACION INVISIBLE DE UNWIRKSAM LASER CLASE 3B CUANDO LA UNIDAD GEMACHT WIRD NICHT DIREKT OPTICA ESTA ABIERTA O LA UNIDAD DEM STRAHL DEL CILINDRO ES RE
152. old 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 O 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 is set at 71 the value of the toner near empty status threshold setting 08 971 is automatically set at 1 and the toner remaining check func tion is enabled February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 5 12 3 3 Recovered toner supply mechanism The toner scraped off by the drum cleaning blade is transported by the toner recovery auger and the toner recycling auger to be recycled and then returned into the developer unit Then the recovered toner in the developer unit is mixed by 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 1 and transported to the developer sleeve Drum cleaner Mixer 1 Mixer 2 Toner recovery auger Mixer 3
153. oller After the paper is aligned by the registration roller the bypass pickup solenoid SOL2 is turned OFF to stop the bypass pickup roller and bypass feed roller and the bypass pickup roller returns to its original position Bypass feed clutch Bypass pickup clutch Bypass feed roller Spring Bypass separation pad Fig 10 5 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 8 10 4 3 General operation A From power ON to standby status If the drawer is not completely inserted when the equipment is turned ON it is judged by the drawer detection switch SW5 that the drawer has not been inserted Paper detection in the drawer cannot be performed unless the drawer is fully inserted When the equipment is turned ON if the paper empty sensor S7 is turned OFF L it is judged that there is no paper in the drawer With the sensor S7 being ON H it is judged that there is paper in the drawer If either of the sensors registration sensor S4 or exit sensor S5 is ON meaning there is paper on the transport path when the equipment is turned ON it is determined that a paper jam has occurred and no operation is enabled until the jammed paper is removed B Standby status After the availability of paper is checked as described above the equipment enters the standby state C Drawer feeding When the pickup solenoid SOL 1 is turned ON the
154. oper unit feed roller transport roller and registration roller A driving PC board is embedded in this motor to perform the following controls MAIN board 24vVCOV OFF MMTRCKA Main motor PC board section Motor section FG pulse Wave correction MMTRPLL 1 5V e 24VCOV OFF Y Voltage detection circuit Phase Difference comparator Speed comparator Difference MMTRCCW 1 MMTRBK 0 Y 1 The ASIC outputs the control signals for the main motor rotation Lock protection circuit Excitation phase Phase V switching section Hall elements Rotor position detection Fig 9 2 0 signal Motor rotation command MMTRCCW 1 signal Rotation direction 2 The main motor is rotated by the excitation phase switching section exciting each phase of the main motor 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 Frequency Generator pulse is generated by the rotation of the motor 6 The FG pulse and the reference clock MMTRCKA from the SoC are compared in terms of the phase and speed a
155. p February 2007 TOSHIBA TEC CORPORATION All rights reserved Fig 13 22 e STUDIO167 207 237 FUSER EXIT UNIT 13 17 3 Pull out the center heater lamp and side heater lamp Notes Wheninstalling the heater lamps be sure 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 Wheninstalling the heater lamps be sure to face up their weld sides e 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 screw hole The con nector on each end of the harness which connects to the side heater lamp has a big one Fuser roller 2 1 Take off the center heater lamp and the side heater lamp P 13 17 F Center heater lamp Side heater lamp LAMP 1 LAMP2 2 Take off the separation fingers P 13 16 E Separation finger 3 Take out the fuser roller upward Notes Wheninstalling the fuser roller slide each bushing on both edges of the roller out ward so that the bushings will engage with the frame and the installation will be secured Donotapply force onto the roller because it may be deformed e STUDIO167 207 237 FUSER EXIT UNIT Center heater lamp Side heater lamp Fig 13 23 Upper side cente
156. per feed clutch is turned ON when paper is fed out of the PFP Paper E16 The PFU feed sensor is not turned ON in a fixed period of time after the paper feed clutch is turned ON when paper is fed out of the PFP v Paper jam E32 and E35 The error code differs depending on its paper source Refer to the error code list in the Service Handbook D Replace the toner cartridge Toner density becomes low Auto toner sensor detects the absence of the toner Control circuit 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 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 GENERAL OPERATION E Developer unit not installed properly Disconnection of the connectors of the developer unit V Set process unit is displayed START button disabled V Solution Connect the connectors of the developer unit and close the front cover F Call for service Error code is displayed instead of the set number by pressing the CLEAR button and 8 button simultaneously when the service call lamp is blinking Refer to the error code table in the Service Handbook e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 4 10 4 4 Flow Chart 4 4 1 Immediately after the power is turned ON Main switch ON
157. plexing Unit ADU 1 Take off the right rear cover P 2 22 I Right rear cover Connector 2 Remove 1 screw and 1 ground wire 3 Disconnect 1 connector Ground wire Fig 14 8 4 Open the transfer unit and release the ADU stopper ADU stopper 5 Take off the ADU cover while sliding it toward the right 6 Remove 4 screws and take off the ADU Slit ADU stopper Note When installing the ADU be sure to put the 5 4 ADU stopper on the rear side through the rear slit of the ADU Fig 14 10 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved AUTOMATIC DUPLEXING UNIT ADU OPTION MD 0103 14 12 B ADU driving PC board ADU Take off the ADU 14 12 Automatic Duplexing Unit ADU Disconnect 2 connectors release the latch and take off the ADU driving PC board 1 2 C ADU motor M8 Take off the ADU 14 12 Automatic Duplexing Unit ADU Disconnect 1 connector remove 2 screws 1 2 and take off the ADU motor with the bracket 3 4 Remove the gear Remove 2 screws and take off the ADU motor February 2007 TOSHIBA TEC CORPORATION All rights reserved 14 ADU driving PC board Fig 14 11 Connector ADU motor Bracket Fig 14 12 ADU motor Fig 14 13 e STUDIO167 207 237 AUTOMAT
158. process unit P 11 9 A Process unit for MJD 2 Disconnect 2 connectors and remove 2 Screws 3 Release 1 latch Then pull out the process unit front cover and take it off Process unit front cover Fig 11 8 except for MJD Process unit front cover Connector Fig 11 9 Note When installing the process unit front cover wire the harness correctly in order not to con Harness tact the gears and harness of the process unit front cover each other Process unit front cover Fig 11 10 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 10 07 03 4 Lift up the drum cleaner unit and take it off Notes 1 Be careful not to touch or scratch the drum surface at this time Fig 11 11 2 Do not deform the guide mylar by touch ing this Fig 11 12 C Discharge LED ERS 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 Discharge LED unit Fig 11 13 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 11 3
159. r February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 Bypass feed roller E3 Bypass separation pad 4 Bypass paper sensor S8 E5 Bypass tray F1 Needle electrode F2 Main charger F3 Main charger grid F4 Toner cartridge G1 Transfer charger wire G2 Separation charger wire G3 Transfer guide roller H1 Drum H2 Discharge LED H3 cleaning blade H4 Recovery blade H5 Drum separation finger 11 Developer sleeve Magnetic roller I2 Mixer 1 I3 Mixer 2 14 Mixer 3 I5 Doctor blade l6 Auto toner sensor S6 I7 Toner recovery auger IB Toner recycle auger I9 Drum thermistor THMS4 110 Drum damp heater DH3 11 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 46 Center Side Edge thermistor THMS1 2 3 J7 Fuser thermostat THMO1 J8 Exit roller J9 Exit sensor S5 K1 Front cover opening closing switch SWA K2 Front cover opening closing interlock switch SW3 Temperature humidity sensor S3 Switching regulator K5 ADU cover opening closing interlock switch SW2 L1 ADU upper transport roller L2 ADU lower t
160. r abnormal If one of the fuser roller thermistors is broken the control circuit judges that the fuser roller tempera ture is extremely 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 thermistor abnormality The thermistors automatically turn OFF the power when the temperature of heater lamp exceeds the specified temperature e 45V z Center thermistor Side thermistor A D Mv converter e 5V Edge thermistor Fig 13 5 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved FUSER EXIT UNIT 13 10 7 Abnormality detection by the thermistors The following table shows the conditions judging the fuser roller temperature abnormality and detecting timing Temperature judged Error d Priority Center Side Edge judging a timing code thermistor thermistor thermistor timing On usual 1 230 or above On usual C44 230 C or above 230 or above Detecting 40 1 40 or below Specified C41 40 or b
161. r clock 7 Shift register 2 5555 bid sensor 642 643 644 6045 646 647 1286 1287 1288 1289 1290 1291 1930 1931 1932 i Chip 1 Chip 2 Chip 3 OS1 OS2 053 054 1 Chip2 Chip4 5 7 Chip8 Chip9 Chip 10 Chip 11 JA JA JA 1 2 3 4 Primely scanning 7084 pixels 1 line Fig 6 6 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 10 Shading correction A variation is caused by the following factors in the CCD output 1 The light source has a variation in its light distribution 2 Each of the 7 084 elements varies in optoelectronic 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 5 W K Coefficient Image data before correction Black data stored in Black memory White data stored in White memory eum Um February 2007 TOSHIBA TEC CORPORATION
162. r detected Add paper is displayed The LED on the control panel corresponding to the drawer blinks When the drawer is selected START button disabled In cases of the equipment drawer or the PFU drawer When the drawer is installed Drawer detected Paper empty sensor OFF Add paper is displayed The LED on the control panel corresponding to the drawer blinks When the drawer is selected v START button disabled In case of the PFP drawer When the drawer is installed When the power is turned ON or the drawer is installed PFP starts initialization The detection of paper existence starts Tray up motor ON Tray is raised At this time the tray up sensor and paper empty sensor are OFF When the tray up sensor is not turned ON in a fixed period of time Tray abnormality gt Add paper is displayed regardless of the existence of paper gt Cleared by turning the power ON and then OFF The tray up sensor is turned ON in a fixed period of time The tray up motor is stopped At this time if the paper empty sensor is ON It is judged that there is paper OFF It is judged that there is no paper V The lamp on the control panel corre sponding to the drawer blinks When the drawer is selected e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION When paper becomes almost empty as they fed out during copying The tray up sensor is turned OFF
163. r heater lamp Fig 13 24 Fuser roller Fig 13 25 February 2007 TOSHIBA TEC CORPORATION All rights reserved 13 18 4 Remove 1 C ring and 1 bushing on the frot side of the fuser roller Bushing 5 Remove 1 C ring 1 gear and 1 bushing on 19 Gear C ring the rear side of the fuser roller C ring Bushing Fig 13 26 Pressure roller 2 1 Take off the pressure roller unit P 13 12 B Pressure roller unit Fuser roller unit 2 Remove 3 screws and then take off the fuser unit entrance guide Fuser unit entrance guide amp Fig 13 27 3 Remove 2 springs Note When installing the spring be sure to hang the spring on the upper hook Fig 13 28 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 19 4 Take off each 1 pressure lever on both front and rear sides 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 Pressure lever Fig 13 29 Pressure roller Bushing Bushing ground plate Fig 13 30 Ce
164. racteristics would match with the copy mode 4 Gradation processing This function switches the type of gradation processing depending on the copy mode A type which selects the printer characteristics giving the priority to resolution such as for text data and another which selects the printer characteristics giving the priority to 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 reduces jaggy area and output images after processing the smoothing the character outline 7 Image area control This function sets the effective image area in horizontal and vertical directions to be output 8 Laser related control This function performs the APC Auto Power Control 9 Printer high quality processing This function reproduces the image signals output from the printer controller sharper e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved IMAGE PROCESSING 8 LASER OPTICAL UNIT 8 1 General Description The laser optical unit radiates the laser beam onto the photoconductive drum responding to the digital image signals transmitted from the MAIN board to create the latent image Image signal is converted into the light emission signal of the laser diode on the laser driving PC board LDR then radiated on the drum
165. ransport roller L3 ADU paper guide e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 Rear side M8 ET SOL2 CLT1 SOL1 SW5 M3 M6 Fig 2 2 7 M1 Scan motor M2 Toner motor Main motor M5 Exhaust fan M6 Switching regulator cooling fan M7 Exit motor Option M8 ADU motor Option S1 CIS home position sensor S2 Platen sensor SW5 Drawer detection switch CLT1 Registration clutch 5011 Pickup solenoid SOL2 Bypass pickup solenoid February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 2 Electric Parts Layout A Scanner control panel Fig 2 3 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved OUTLINE OF THE MACHINE B Power supply section switches Sa JN 6 SW3 SW2 Fig 2 4 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE C Laser optical unit fuser unit toner cartridge section M4 THMS3 Fig 2 5 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION AII rights reserved OUTLINE OF THE MACHINE D Developer unit section ERS lt N Fi
166. rcuit Constant optical output Monitor efficiency Monitor output regulation circuit Fig 8 8 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 LASER OPTICAL UNIT 8 4 Polygonal Motor Control Circuit The polygonal motor is a DC motor rotated by a clock signal PMTRCLK output from the SoC This motor is controlled under PLL Phase Locked Loop to realize an accurate and constant rotation Its rotation status is converted to a status signal 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 MAIN board PMTRCLK 777 PMTRCLKB Polygonal motor PMTR 0A PMTRSTS 0 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 PLL control signal Rotating at a constant Stopping or error speed e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 8 5 Disassembly and Replacement A Laser optical unit 1 Take off the rear cover P 2 22 J Rear cover 2 Disconnect 3 connectors from the MAIN board Note Connect the f
167. reases The magnetic resistance decreases The detection output increases The auto toner output Vars increases When the toner density is high The ratio of the toner against the carrier in the developer material increases The magnetic resistance increases The detection output decreases The auto toner output Vars decreases e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 10 12 6 Disassembly and Replacement A Developer unit Note Make sure to perform 05 280 and take off the process 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 Developer unit 2 Do not deform the Guide Mylar by touch ing this Fig 12 7 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 11 B Developer material 1 Take out the developer unit 12 11 Developer unit 2 Remove 2 screws and slide the developer unit upper cover to the direction of the arrow and take it off Developer unit upper cover Note When installing the developer unit upper cover mak
168. rmality e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 6 11 5 Drum Temperature Detection Circuit 11 5 1 General description To prevent the print quality from varying depending on the temperature the temperature of the drum surface and around the drum is detected by the drum thermistor Based on the result of the detection this circuit 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 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 resistance decreases as the temperature rises thus the volt age input to the A D converter becomes smaller along with the rise of the temperature MAIN board 5V Digital DRTH 1A AID data converter Drum thermistor 3 Fig 11 4 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 7 11 6 Temperature Humidity Detection Circuit 11 6 1 General Description To prevent the print quality from varying depending on the temperature and humidity of the place where the equipment is installed the temperature and humidity o
169. rminal cover Fig 11 18 Needle electrode Fig 11 19 e STUDIO167 207 237 DRUM RELATED SECTION H Drum 9 1 Take off the main charger P 11 12 D Main charger 2 Rotate the lever while pushing its latch and pull it out 3 Take 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 I Drum cleaning blade GD 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 blade e STUDIO167 207 237 DRUM RELATED SECTION Fig 11 20 Fig 11 21 February 2007 TOSHIBA TEC CORPORATION All rights reserved 11 14 J Drum separation finger 1 Take off the drum P 11 14 H Drum 2 Take off 2 drum separation finger units by removing 1 screw each Note When replacing the drum separation fingers make sure that the drum has been taken off first since the fingers may scratch the drum surface Drum separation finger unit Fig 11 22 3 Take off the drum separation finger with the spring Drum separation finger Note When the drum separation fingers have been replaced check if the pressure movement is normal by mo
170. rness to the MAIN board with its electrode 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 the ADF RADF closed after replacing the MAIN board D wg MAIN board Fig 2 24 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 OUTLINE OF THE MACHINE 2 23 B SRAM board SRAM 1 Take off the rear cover 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 RADF closed after replacing the SRAM board SRAM board 3 Make sure that the direction of the battery on the SRAM board is correct when SRAM board replacing it Fig 2 26 C Fuse PC board FUS Note This fuse PC board is copacked with the damp heater unit The damp heater unit is optional for NAD CND and MJD 1 Take off the rear cover P 2 22
171. rod and a needle electrode attached between them When high voltage 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 addition a cleaner is installed to clean up the dust attached on the needle electrode Needle electrode The needle electrode has aligned needles and their points perform the corona discharge These points electrodes discharge toward the drum in one direction to realize the more efficient dis charging comparing to the charger wire which discharges in a radial direction Therefore the needle electrode enables to reduce the ozone amount Main charger Charge Fig 11 2 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 3 3 Drum cleaner Cleaning blade This blade is pressed against the drum surface and scrapes off the residual toner from the drum surface Recovery blade This blade catches the toner scraped off by the cleaning blade Toner recovery auger This auger carries the residual toner scraped off to the developer unit and reuses the toner 4 Transfer Separation charger Transfer guide
172. rol the aligning amount of the paper the amount of the paper bend before it is transported to the registration roller Also it is used to detect the trailing edge of the paper has passed the registration roller 15 Drawer detection sensor SW5 The switch to detect whether the drawer is fully inserted or not e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 10 4 10 4 Operation 10 4 1 Drawer A Operation of pickup roller When the drawer is inserted into the equipment the lock located in the center of the drawer is released and the tray in the drawer is lifted up by the spring This makes the paper set in the tray contact the pickup roller when it is rotated The driving force of the main motor M3 is transmitted through the pickup clutch to the pickup roller Also the drawer pickup clutch transmits the drive when the pickup solenoid SOL 1 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 SOL 1 is turned ON at each rotation One rotation of the pickup roller which is semicircle shaped can transport a sheet of paper to the registration roller This feeding system has no mechanism specific for detecting the transported paper Therefore whether the paper has been transported to t
173. sed on the green light source in this way the total light amount is adjusted MAIN board Contact image sensor unit Yellow Green SCNLEDVR3 1 Serial data D A SCNLEDVR1 1 SSS et converter SCNLEDVR2 1 SCNLEDROFF 1 SCNLEDGOFF 1 SCNLEDBOFF 1 SCNLEDASTOFF 1 Fig 6 4 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 5 2 CCD control circuit On the contact image sensor CIS unit CCD Charge Coupled Device with 7 084 effective pixels are mounted as the optoelectronic element for converting the light reflected on the original into electrical signals analog signals CCD is driven by the clock 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 CDINO 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 MAIN board Contact image sensor unit TRCLCK MCLCK RSCLCK IMGDTA O 4 IMGDTA 1 IMGDTA 2 IMGDTA 3 IMGDTA IMGDTA IMGDTA IMGDTA t Fig 6 5 February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 SCANNER
174. sensor is comprised of an infrared light emitting diode and a phototransistor It uses pulse modulation to detect an original Original A S BN Phototransistor Fig 6 11 The light emitting diode is driven by a pulse having a 130 usec cycle and an 8 usec 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved SCANNER 6 16 6 7 Disassembly and Replacement A Original glass 1 Remove 2 rubber caps and 2 screws take off the original glass holder while sliding it to the 7 2 The rubber caps are not installed the equipment for NAD CND AUD TWD KRD KO 2 22 and ARD 4 glass holder 2 Remove 2 rubber caps and 2 screws take off the original glass Rubber cap 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 KRD and ARD 3 Take off the ADF original glass February
175. t 3 Take off 2 brackets by removing 2 screws each 4 Remove 11 screws disconnect 1 connector and then take off the control panel PC board e STUDIO167 207 237 CONTROL PANEL Cover Fig 5 9 Bracket lon February 2007 TOSHIBA TEC CORPORATION All rights reserved C LCD PC board LCD 1 Take off the control panel pc board P 5 8 B Control panel PC board HPNL 2 Remove 2 screws and take off the LCD PC board February 2007 TOSHIBA TEC CORPORATION All rights reserved LCD PC board A 4 E dgio 3 is lo oO 5 OUO 5 Ie Fig 5 12 e STUDIO167 207 237 CONTROL PANEL e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 5 10 6 SCANNER 6 1 General Description In the scanning s
176. t Lis 5 E jt i HB ss RADA RAZS RATS 52 d i aa 125 TO82308AFG v CN age 55 58 g 55 2 13 rato Sp sez Enz penu ONLY 55 Raio 222 esso 3 ONLY ces amis ees RADO 8 1 53 EC N204 RAIS RAL T RAIS RA pere z 5 RASE AAS RAID RATT z i man m RAP RAN CBT 55 552550 5222522225 Seas ma 11711 8 1 5 E cus oe M Loto esce cede eus 5 E SOMME NEUEN 1 67 2 24 ji Kaszersazivucs KASSET I2H UCTS K45560832H UC75 icem z 25 i X PWB F MAIN 2865 EE 25 SaF 3 E lt 6LH27206000 55 eS c ui EP GW boc 25 119 5 ase T a2 BOUES cas 4 5 VHCT14 529GL032M80TFIRAO TL 5 ics B 1046 Zl R48 R49 2 S 5 duca a MENS E 5 LEAD FREE PCBA Je amp 1 5 c202 bod 1c27 C111 10 16 Hver ONLY 2 NULLUM 20 muscae NORMAL 5 ps s as SS 35 255558 TP26 moo ad 28 2 BE Bs ospite Td RARE a 22 en ani 5 5 82 o 5 c203 T 10 18 pou HE 2 gas 5 11 2 7 5 5 2 E 5 1 5 18 5 EHE E fas
177. t 2 connectors remove 3 screws and take off the bracket Bracket 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 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 12 16 10 Remove 3 screws Take off 1 bearing and the bracket Fig 12 22 Gear Gear 11 Take off 4 gears and 1 timing belt Fig 12 23 Guide roller Pulley 12 Remove 1 E ring 1 pin and 1 pulley 13 Take off the guide roller on the rear side Fig 12 24 e STUDIO167 207 237 DEVELOPMENT SYSTEM February 2007 TOSHIBA TEC CORPORATION All rights reserved 12 17 14 Remove the seal on the front side Remove 1 E ring and 1 bushing 15 Take off the developer sleeve G Mixer 1 Take off the developer sleeve P 12 14 F Guide roller Developer sleeve 2 Take off the doctor sleeve e STUDIO167 207 237 DEVELOPMENT SYSTEM 12 18 2 Bushing Fig 12 25 Developer sleeve Fig 12 26 Doctor sleeve Fig 12 27 February 2007 TOSHIBA TEC CORPORATION All rights reserved 3 Remove 1 screw and take off the tensioner bracket 4 Remove 2 screws and take off the holder Tensioner bracket Fig 12 28 5 Remove
178. t only when the reference voltage HVDTR O is 0 6 V or less and also the developer bias ON OFF signal HVTAC 0 is ON Reference voltages Vc HVMVR 1 HVDTR 1 HVTVR 1 HVSAV 1 These are analog voltages which are the reference of each output of the charge grid developer 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 data by the D A converter 4 The reference voltage Vc of each bias is output to the high voltage generation circuit 5 The high voltage generation circuit generates the output current voltage which is proportional to the reference voltage The reference voltage is adjusted in the Adjustment Mode 05 The output values of the main charger and transfer guide bias are fixed when the high voltage trans former is shipped from the factory Developer bias AC generation clock HVCLK 0 This clock signal is a reference of the AC component of the developer bias High voltage generation circuit leakage detection signal HVSDWN 0 This signal is for leakage detection of the high voltage generation circuit This signal becomes L level at the occurrence of such an abno
179. tecting the laser beam position Fig 2 5 5 13 H sync signal detection PC board SNS board HPNL PWA F HPNL Detecting the button entry and control Fig 2 3 4 20 Control panel PC board ling LED and LCD on the control panel HPNL board CTIF PWA F CTIF Interface for detecting the toner car Fig 2 5 7 30 Toner cartridge interface PC board tridge CTIF board Detecting the CTRG board CTRG PWA F CTRG Storing the status of the toner cartridge Fig 2 5 103 3 Toner cartridge PC board CTRG board FUS PWA F FUS Supplying power to each damp heater Fig 2 6 7 12 Fuse PC board FUS board Optional for NAD MJD CND model standard for other models PWA F PFC Controlling the automatic duplexing unit Fig 2 7 7 35 Paper feed controller PC board and paper feed pedestal PFC board Option ADU PWA F ADU Controlling the automatic duplexing unit Fig 2 9 MD 0103 ADU driving PC board ADU board Option 1 13 6 Lamps and heaters Symbol Name Function Remarks LAMP1 CNTR LAMP Heating the center section of the fuser Fig 2 5 23 12 Center heater lamp roller LAMP2 SIDE LAMP Heating the section of both sides ofthe Fig 2 5 23 13 Side heater lamp fuser roller ERS LP ERS Removing the residual charge from the Fig 2 6 20 13 Discharge LED drum surface DH1 SCN DH L Preventing condensation in the scan Fig 2 3 9 17 Scanner damp heater Left ner unit Optional for NAD MJD CND model standard for other models DH2 SCN DH R
180. th the rotation stopper of the registration roller holder 4 Remove 1 clip and take off 1 bushing February 2007 TOSHIBA TEC CORPORATION All rights reserved Tonner motor Bracket Fig 9 5 Registration roller holder Rotation stopper Fig 9 6 gt Dd Clip Bushing Fig 9 7 e STUDIO167 207 237 DRIVE UNIT 5 Disconnect 1 connector remove 3 screws and take off the main motor drive unit LF Connector Main motor drive unit Fig 9 8 6 Loosen 1 tensioner fixing screw and remove the tension spring e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRIVE UNIT 7 Take off the gear and timing belt from the main motor drive unit Timing belt Gear Gear G 8 b d 8 Main motor drive unit Fig 9 10 Notes Do not apply more tension to the belt of the main motor drive unit than that pro duced by the spring 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 Tensioner spring Loosen the tensioner fixing screw
181. the L shaped portion of the bottom of the CIS case comes under the CIS unit drive belt 1 CIS unit drive belt 1 Take off the CIS case P 6 24 H CIS case Loosen 1 fixing screw of the tension bracket 1 2 February 2007 TOSHIBA TEC CORPORATION All rights reserved 6 25 CIS case Shaft guide Tension bracket Fig 6 35 e STUDIO167 207 237 SCANNER 3 Take off the CIS unit 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 J CIS unit drive belt 2 1 Take off the scanner top cover P 6 18 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 25 I CIS unit drive belt 1 4 Loosen 2 fixing screws of the scan motor 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 20 D Scan motor M1 e STUDIO167 207 237 SCANNER Fig 6 36 Scan motor Fig 6 37 CIS unit drive belt 2 February 2007 TOSHIBA TEC CORPORATION All rights reserved 7 IMAGE PROCESSING 7 1 General Description The image processing section inputs the
182. the developer bias Charging AC bias White background Magnetic roller Toner Carrier always attracted onto the magnet Toner Bias voltage 357 VDC Photocon ductive WSS Ss drum Photoconductive layer Uf Aluminum base Fig 3 9 Halftone Solid 1 1 White background 1 Image not developed i Bias image developed by 777 potential toner Fig 3 10 To obtain the stable development characteristics AC bias approx 1 100 V is charged to the development bias DC bias February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 COPY PROCESS Developer material The developer material consists of a mixture of the toner and carrier The toner is charged to the negative polarity and the carrier to positive polarity due to the friction with each other caused by mixing Toner Mainly consists of the resin and carbon Carbon Carrier Consists of the ferrite and resin coating on 5 10 its surface to provide consistent frictional NC electrification 255 um Ferrite Resin 90 95 Toner 30 100 um Carrier Fig 3 11 Note If the developer material is used for a long time beyond its normal Toner Carrier 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 Repla
183. thin a specified period of time it is judged that the heater is abnormal When the specified temperature has been reached normally the equipment goes into the ready state When printing is not performed within a specified period of time during ready the equipment enters the Auto Power Save Mode and turns the 2 heater lamps OFF or lowers the control temperature to save power consumption And if printing is not performed within another specified period of time after the equipment has entered the Auto Power Save Mode the equipment then enters the Auto Shut Off mode to turn OFF the 2 heater lamps February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 5 13 5 Fuser Unit Control Circuit 13 5 4 Configuration In this equipment the surface temperature of the fuser roller is controlled by turning ON OFF 2 heater lamps center and side which have different heat generating positions with the command from the SoC on the MAIN board The surface temperature of the fuser roller is detected by 3 thermistors center side and edge and then the information of the temperature is transmitted to the SoC and each control circuit Based on the detected temperature the SoC transmits the control signal of the heater lamp to the control circuit TRC Triac of each heater lamp on the switching regulator The power supply to each fuser roller is thus controlled by driving TRC The SoC detects the overheating of the
184. thout heat absorption by the paper since it does not pass through this area The edge thermistor THMS3 detects any temperature abnormal ity of this area caused by overheating of the fuser roller Therefore this thermistor is not used for temperature control of the fuser roller Fuser thermostat THMO1 The fuser thermostat THMO1 cuts off the power supply to the heater lamps LAMP 1 LAMP2 by opening itself if the fuser roller becomes abnormally hot as a result of the problem such as ther mistor malfunction The fuser thermostat THMO1 for this equipment is used to prevent abnormal operation When the fuser thermostat THMO1 detects any abnormality it must be replaced as well as the other damaged parts in the fuser unit Separation finger Five separation fingers are installed above the fuser roller in order to separate paper adhering to each roller Exit roller The exit roller which transports the paper to the inner tray is driven by the main motor M3 It is driven by the exit motor M7 when the ADU optional is installed February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 FUSER EXIT UNIT 13 3 10 Exit motor M7 The exit motor is a stepping motor which drives the exit roller This motor rotates reversely to switch back the exit roller when the paper is transported to the ADU Install this exit motor M7 when the ADU optional is installed e STUDIO167 207 237 February 2007 TOSHIBA T
185. thus the warming up time is shortened Heater lamp LAMP1 LAMP2 The heater lamps are halogen lamps to apply heat to the fuser roller The fuser unit in this equip ment has 2 heater lamps 564W 564W with different functions each other One has a coil wound up on its center and this part generates heat The other one has coils wound up on its both ends and these parts generate heat one has a coil on its center is called the center heater lamp LAMP1 and the one has coils on its both ends is called the side heater lamp LAMP2 The heater lamps are fixed on the inside of the fuser roller to heat it up The heater lamps do not rotate even when the fuser roller is rotating Sensor 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 lamps and when it is higher than the preset temperature it cuts off the supply The center thermistor THMS1 detects the temperature of the center part of the fuser roller and the side thermistor THMS2 detects the temperature of one side of fuser roller and control the both sides Edge thermistor THMS3 Both the ends of the fuser roller may be overheated wi
186. uary 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 POWER SUPPLY UNIT 15 4 Fuse When the power supply secondary fuse is blown out confirm that there is no abnormality with each 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 PFC board Exit motor M7 ADU board ADU motor M8 PFU PFP 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 controller e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 15 4 15 5 Configuration of Power Supply Uni NIYIN NIVIA NIVIA paeog NIVIA paeog NIVIA NIV 24d ddd pyeoq 54d ew nav preoq 54d 54d e ddd pyeoq nav 24d yun Xv NIYIN joued p1eoq NIYIN SN peog NIV NIYIN JQv Javs NIVW Nad NIV sjeuis 0 33OA THHLI H gZNOLH S8LNOJH AvC
187. uration The following diagram shows the image processing section of this equipment CIS Image processing section Optoelectronic conversion 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 Memory Sorting LDR board e STUDIO167 207 237 IMAGE PROCESSING Laser drive mage data flow Fig 7 2 February 2007 TOSHIBA TEC CORPORATION All rights reserved 7 3 Board 7 3 1 Features 1 The image processing section on the MAIN board 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 Laserrelated control Printer high quality processing February 2007 TOSHIBA TEC CORPORATION AII rights reserved e STUDIO167 207 237 IMAGE PROCESSING 7 3 2 Functions of image processing circuit 1 High quality image processing Background processing function Range correction This function processes to remove undesirable fog from the background so that the or
188. ving them with your hands Fig 11 23 K Recovery blade 1 Take off 2 drum separation finger units P 11 15 J Drum separation finger 2 Remove 2 screws and take off the whole recovery blade with the bracket Recovery blade 6 Fig 11 24 February 2007 TOSHIBA TEC CORPORATION All rights reserved e STUDIO167 207 237 DRUM RELATED SECTION 11 15 L Transfer Separation charger 1 Open the ADU cover and transfer unit 2 Release the latch and take off the transfer and separation chargers Fig 11 25 M Charger wire GD Length 353 mm tungsten wire diameter 0 06 mm 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 Terminal cover lt gt cover on the rear side Fig 11 27 e STUDIO167 207 237 February 2007 TOSHIBA TEC CORPORATION All rights reserved DRUM RELATED SECTION 11 16 5 Remove the terminal and spring Then take off the transfer charger wire Cushioning material 6 Remove the cushioning material disconnect 4 the terminal and remove the spring Then take off the separation charger wire Notes Terminal 1 25 Insert the wire securely into the V grooves
189. y scanning pixel Density Density After low pass filter 0123456789 0123456789 Primary scanning pixel positions Primary scanning pixel positions Fig 7 4 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 Characteristic of the lens and other factors cause this phenomenon In this equipment processing such as edge enhancement is applied between the targeted pixel and the neighboring pixels to eliminate this phenomenon and realize high reproducibility of original Solid black area Low contrast area Original Image signal After correction 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 memory control function in the process of the image processing operation Example Enlargement 100 DIEI NS 200 February 2007 TOSHIBA TEC CORPORATION rights reserved e STUDIO167 207 237 IMAGE PROCESSING Example Reduction 3 Gamma correction This function corrects the input output characteristics of the scanner printer and adjusts the image signals so that the input output cha

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