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e-STUDIO550/650/810 Service Manual

Contents

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8. O Connecotor JUNE 2002 TOSHIBA TEC Laser optical unit 1 Removethe original glass and lens cover p gt Chap 6 2 Loosen 2 laser unit setscrews 3 Remove the laser fan motor 4 Disconnect 3 connectors and pull out the laser unit
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10. O Reverse guide Mirror seal Attatch the mirror seal between ribs Do not interfere the rib JUNE 2002 TOSHIBA TEC 16 91 e STUDIO550 650 810 RADF 17 POWER SUPPLY UNIT 17 1 Construction 17 2 Operation of DC Output Circuits 17 3 Output Channel 17 4 Fuse 17 5 Configuration of Power Supply Unit 17 6 Power Supply Sequence 17 POWER SUPPLY UNIT 17 1 Construction The power supply unit is comprised of the AC filter and insulation type DC output circuits 1 AC filter AC filter eliminates noise from the outside and prevents the noise generated by the copier from leaking to the outside 2 DC output circuits The DC outputs are roughly divided into the following two lines Main switch system Power supply used during image forming processes consisting of the outputs of four voltages 3 3V 5 1V 12V and 24V which start up when the main switch is turned ON Door switch system Power supply used by the entire machine during image forming processes and
11. JUNE 2002 TOSHIBA TEC 16 89 e STUDIO550 650 810 RADF 1 5 Mirror seal for read sensor Reference hole Attatch the mirror seal with locating its edge to the reference hole position Mirror seal S Platen guide Mirror seal Reference hole e STUDIO550 650 810 RADF 16 90 JUNE 2002 1 6 Mirror seal for large original exit sensor N N Dispositioning from the edge of the guide is not allowed 0 1 0 mm Ref
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13. JUNE 2002 TOSHIBA TEC 9 21 e STUDIO550 650 810 PAPER FEEDING SYSTEM G Tandem LCF G 1 Feed side front guide 1 Remove 2 screws fixing the feed side front guide 2 Lift the paper guide a little and insert it in the groove of the paper size marking Then tighten up the screw after confirming the screw hole position G 2 Feed side rear guide 1 Remove 2 screws fixing the feed side rear guide 2 Lift the paper guide a little and insert it in the groove of the paper size marking Then tighten up the screw after confirming the screw hole position e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 22 4 p gu Paper size marking JUNE 2002 TOSHIBA G 3 Standby side front guide 1 Remove 1 screw fixing the standby side front guide and move the guide toward the dir
14. Note When installing the transfer belt unit install it as the lever comes under the cam ee AU e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 4 JUNE 2002 TOSHIBA TEC Transfer belt 1 Remove the transfer belt unit 2 Turn the transfer belt keeping feeding section 90 degrees and pull it out upward 3 Remove 2 screws Note When tightening up the screws tighten them so that the link plate is securely fixed by pushing it toward the direction of the white arrows 4 Turn the drive roller as the picture shows 5b Pull out the transfer belt Notes 1 When installing the transfer belt install it at the center not to be moved aside 2 Do not touch the surface of the belt with bare hands JUNE 2002 TOSHIBA TEC 13 5 e STUDIO550 650 810 TRANSFER TRANSPORT UNIT Brush 1 Remove the transfer belt keeping feeding section 2 Remove 1 screw and take off the plate spring 3 Move the transport guide to the rear side and pull it out upward 4 Remove 1 clip and take off 3 gears Notes 1 The gears a c has a latch and remove the gears in the order a b c 2 When installing each gear make sure the latch fits into the groove portion of the shaft 5 Remove
15. 9 008 95 5185 axis axus 223296 es AA LL LAU AS A A AL AS AD A AS AD AE AE Ce OO ANAS 6 SSPN 2020 20 20 20 20 20 20 20 20 20 20 20 20 20 20 9595 9 C0 80 80 SS DUSUN GESEH LA 0141 8096 SP gt 094 191 20 20 gt 20 20 20 20 es 69 RS RS RS 29 gt gt 4444444 00 49H 09HA 684 169630 891 Lol 22222222 GKR HSH ee 2 802 909 VH
16. SYS board Hard disk 29 e STUDIO550 650 810 OUTLINE OF THE MACHINE 3 Disconnect 19 connectors to the LGC board 4 Remove 6 screws and take off the bracket with the LGC board LGC board 5 Disconnect 6 connectors remove 1 screw release 3 lock supports and take off the high voltage transformer C Power supply unit 1 Remove the SYS board hard disk and LGC board with the bracket 2 Remove 4 screws and take off the bracket of
17. Connector End fence motor e STUDIO550 650 810 PAPER FEEDING SYSTEM 10 PROCESS RELATED SECTION 10 1 Construction 10 2 Functions 10 3 Charger Wire Cleaner Operational Circuit 10 4 High voltage Transformer Output Control Circuit 10 4 1 General description 10 4 2 Operation 10 5 Surface Potential Sensor 10 5 1 General description 10 5 2 Construction 10 5 3 Control method 10 6 Disassembly and Replacement 10 PROCESS RELATED SECTION 10 1 Construction This chapter describes the image formation process related units parts and control circuit etc Mainly included in this chapter are the followings Main charger Charger wire cleaner Discharge lamp Ozone filter High voltage transformer Surface potential sensor Exhaust duct The drum cleaner unit developer unit and transfer belt unit are described in other chapters Charger wire cleaner Main charger Discharge lamp Surface patential sensor Sectional view JUNE 2002 TOSHIBA TEC 10 1 e STUDIO550 650 810 PROCESS RELATED SECTION 10 2 Functions 1 Drum The drum is cylindrical aluminum base which is applied the organic photosensitive material photoconductor thinly on it The photoconductor becomes insulative low electric resistance at the dark places out of the light while it becomes cond
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19. e STUDIO550 650 810 RADF 16 10 JUNE 2002 When the original has proceeded a specified distance after the small original sensor had detected the trailing edge of the original the small original ekit motor stops rotating Then the operation ends after 2nd original has been discharged ell oig 1 A pi e 0 2002 16 11 e STUDIO550 650 810 RADF 16 5 2 A4 two sided feeding Operational condition A4 original Reproduction ratio 100 1 Original setting Same operation as 16 5 1 1 2 Lifting of the lifting tray Same operation as 16 5 1 2 3 Start of separation Same operation as 16 5 1 3 4 Start of feeding Same operation as 16 5 1 4 5 Start of top side scanning Scanning starts after receiving the original transport signal from the copier At the same time the original stop signal is reset The read motor starts to rotate forward and to separete 2nd original When the leading edge of the original has reached the scanning section both the SCN STR and the large original exit solenoid turn ON When the leading edge of the ori
20. the power supply unit 3 Disconnect 1 link connector 4 Remove 9 connectors and pull out the power Supply unit Note Be careful not for the power supply unit to be caught by harnesses Link connector 3 e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 30 JUNE 2002 TOSHIBA 3 COPY PROCESS 3 1 General Description 3 2 Details of Copy Process 3 3 Comparison of Copy Process to 6570 5570 3 COPY PROCESS 3 1 General Description Discharging K _ Fusing 1 JUNE 2002 TOSHIBA TEC Original exposure 1 Charging 733V grid voltage Discharging LED array 660nm x 16 Blade cleaning Fuser roller 700 1450W Charging Negatively charges the surface of the photoconductive drum Y Original exposure Converts images into optical signals Y Scanning Converts image optical signals into electrical signals Y Writing Converts image electrical signals into optical signals laser emission and exposes them to the surface of the photoconductive drum Y Development Makes the negatively charged toner adhere to the photoconductive drum and forms a visible image Y 69 Q
21. F Scanning section control PC board SLG board _ Connector G 1 Remove the original glass and lens cover AMEN Lens unit Pp m 2 Disconnect 7 connectors remove 4 screws and take off the SLG board Lens unit 1 Remove the original glass and lens cover 2 Disconnect 2 connectors remove 2 screws and take off the lens unit Notes 1 Do not touch the screws shown with the arrows 8 paint locked screws when changing the lens unit 2 Handle the lens unit with enough care and do not touch the adjusted area and lens JUNE 2002 TOSHIBA TEC 6 17 e STUDIO550 650 810 SCANNING SECTION Carriage 1 Carriage 2 1 Move the carriages toward the exit side 2 Remove 2 screws and take off the brackets fixing the carriage 1 to the wire 3 Disconnect 1 connector of the lamp power supply cable and release the cable from 3 clamps 4 Move the carriage 1 toward the center at the position of th
22. Laser unit PC board 1 Remove the laser unit 2 Disconnect 5 connectors and remove 4 screws to take off the laser unit PC board Notes 1 Do not leave fingerprints or stain on the slit glass 2 Pay close attention not to make an impact or vibration on the laser optical unit since it is a precise apparatus 3 The laser optical unit which has been removed should be placed on the poligonal motor without loading on it 4 Do not disassemble the laser optical unit in the field since it is precisely adjusted and very sensitive to dust and stain JUNE 2002 TOSHIBA TEC 8 9 e STUDIO550 650 810 LASER OPTICAL UNIT 9 PAPER FEEDING SYSTEM 9 1 General Description 9 2 Functions 9 3 Operation 9 3 1 Operation of bypass pickup roller 9 3 2 Operation of cassette pickup roller 9 3 3 Paper separation 9 3 4 General operation 9 4 Drive Circuit for Tray up Motor 9 5 Disassembly and Replacement 9 PAPER FEEDING SYSTEM 9 1 General Description The paper feeding system is for transporting paper set on the cassette bypass tray and tandem LCF to the transfer section The clutch controls to convey the motor drive to each roller and each sensor detects the transporting state of the paper 9 2 Functions Oy WANG Paper feeding system sectional view Front side 1 Bypass pitup o
23. JUNE 2002 TOSHIBA TEC 16 21 e STUDIO550 650 810 RADF 16 5 4 two sided feeding Operational condition original Reproduction ratio 100 1 Original setting Same operation as 16 5 1 1 2 Lifting of the lifting tray Same operation as 16 5 1 2 3 Start of separation Same operation as 16 5 1 3 4 Start of feeding Same operation as 16 5 1 4 NGGI VE D D QN oe ASS 4 i MEN 5 Start of 1st original top side scanning Scanning begins after receiving the original transport signal from the copier At the same time the original stop signal is reset When the read motor starts to rotate forward the feed motor also starts to rotate in reverse and the large original exit solenoid turns ON The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor starts to rotate in reverse when the leading edge of the original has been transported to the large original exit side and come to the 3rd roller When the registration sensor has detected the trailing edge of the original the feed motor stops rotating and the tray lift motor starts to rotate to lift the tray The tray lift motor stops rotating when
24. Lifting tray lower limit sensor JUNE 2002 TOSHIBA TEC G 3 Original length sensor Original length sensor 1 Remove the lower guide 2 Remove 1 screw disconnect 1 connector and take off the original length sensor with the bracket 3 Remove 1 screw and release the original length sensor from the bracket G 4 Cover open close switch 1 Remove the ADF rear cover 2 Remove 1 screw and take off the cover open close switch G 5 Tray sensor 1 Open the tray remove 3 screws and take off the back cover 2 Disconnect 1 connector release the latches and take off the tray sensor Tray sensor JUNE 2002 TOSHIBA TEC 16 81 e STUDIO550 650 810 RADF G 6 Tray widih sensor 1 Open the tray remove 3 screws and take off the back cover 2 Disconnect 1 connector remove 1 screw and take off the tray width sensor Note Put together both marks at the rack and pinion as shown by the right figure when installing the tray width sensor G 7 APS operation sensor 1 2 Disconnect 1 connector 3 Remove the ADF rear cover Remove 1 screw and take off the APS operation sensor with the bracket 4 While turning the sensor flag to deflect the light shielding section from the sensor release the latches and take off the APS operation sensor G 8 Intermediate transport sensor
25. 2 Remove 2 screws and take off the control panel bottom cover 3 Disconnect 3 connecters remove 2 screws release harnesses from 2 clamps and take off the control panel unit 4 Remove 10 screws disconnect 2 connectors and release the braket after disconnecting 1 connector at the counter 5 Disconnect 7 connectors remove 6 screws and Connector take off the DSP board DSP board Connector Connector JUNE 2002 TOSHIBA TEC SE e STUDIO550 650 810 CONTROL PANEL 6 Remove 9 screws and take off the MKEY board 7 Remove 8 screws and take off the SKEY board 8 Remove 4 screws and take off the LCD panel MKEY board LCD panel SKEY board e STUDIO550 650 810 CONTROL PANEL 5 12 JUNE 2002 6 6 6 6 6 6 SCANNING SECTION
26. F Doctor blade 1 Remove the developer material Doctor blade 2 Remove 2 screws and take off the doctor blade AE IREA ih Note When installing the doctor blade put the both N edges of it against the protrusions at the front Protrusion and rear side frames and tighten up the screws to fix it This procedure makes it unnecessary to adjust the doctor sleeve gap G Auto toner sensor 1 Remove the developer material Auto toner sensor 2 Remove 2 screws and take off the auto toner sensor JUNE 2002 TOSHIBA TEC 12 15 e STUDIO550 650 810 DEVELOPER UNIT Guide roller 1 Remove the developer unit A Gre 2 Remove 2 screws and take off the bracket and AN n gt 3 gears do amp o O j 1 Front side 25 3 Remove 1 E ring and take off the spring 4 Remove 2 E rings and take off 2 guide rollers ete H 2 Rear side 5 Remove 1 E ring and take off the gear 6 Remove 1 E ring and 1 spring and take off the bushing 7 Remove 4 screws take off the rear side frame and disconnect the bias connector 8 Remove the bias plate and spring 9 Remove 2 E rings and take off 2 guide rollers Gu
27. 3 Disconnect 1 connector 4 Pull down the fixing pin and turn it 90 degrees 5 Pull out the toner cartridge drive unit about 30 degrees and take it off toward the direction of the arrow A 2 Toner cartridge switch 1 Disconnect 2 connectors remove 2 screws and take off the toner cartridge switch A 3 New toner supply motor 1 Remove 3 screws and take off the top cover 2 Disconnect 1 connector remove 2 screws and take off the new toner supply motor NG SS N NG e STUDIO550 650 810 DEVELOPER UNIT 12 12 New toner supply motor Connector JUNE 2002 TOSHIBA TEC Toner recycle unit B 1 Toner recycle unit 1 Remove the toner cartridge drive unit 2 Remove 2 screws and take off the toner recycle unit Notes 1 Be careful when treating this unit because the toner is liable to be spilled out from the connecting section among the toner recycle unit cleaner unit and developer unit 2 When installing the toner recycle unit put the window of the toner recycle unit shutter section and boss protrusion of the devel oper unit together 3 Be careful not to give vibrations as less as possible when removing installing the toner recycle unit for they may cause stains on images Especially the images are more likely to be stained when the remain
28. Entrance lower guide unit 2 Remove the cleaning roller felt Cleaning roller felt H Thermistor Thermostat 1 Loosen 2 pressure screws completely e STUDIO550 650 810 FUSER UNIT 14 18 JUNE 2002 TOSHIBA TEC 2 Remove 2 screws and take off the stay 3 Disconnect each connector remove each screw and take off the thermistor and thermostat Notes 1 When instaling the thermister and thermostat be careful not to deform them and plate to which they are installed 2 Adjust the gap between the thermostat 2 points and fuser roller to the range between 2 2 5mm 2 0 2 5mm_ Fuser roller 1 Loosen 2 pressure screws completely 2 7 1 o000o 2 Remove 2 screws and take off the fuser unit cover rear Fuser unit cover rear JUNE 2002 TOSHIBA TEC 14 19 e STUDIO550 650 810 FUSER UNIT 3 Remove 2 screws release 2 harness clamp Harness clamp take off the bracket with releasing th
29. MAXSS1EUA 165 802507 ice lt 167 58 100 25 22 TP23 164 8786 F TP37 a 11 P27 163 MT4AS04N F 62 166 09 806601M F PWB F N 340 6LA07012000 gt GW MD FR TOSHIBA 8 PWA F MOT 340 ON 8K 01 RN2201 Len Tm GE mS T E MI e TT Og 6712BMK4 220 B11 100 50 M 4406376750 300 e STUDIO550 650 810 PC BOARDS 18 6 JUNE 2002 TOSHIBA TEC 9 PWA F MOT2 340 161 STKETISBRKE gt PE WP FR lt JP PWB P MOT2 340 TOSHIBA 6 0693 7000 10 ADF CONTROL PC BOARD 1 CNI6 CN14 RI7 CN13 CN11 moor 5 RAIG 1 17 LV14 HS 11 10 R63 R54 PF2263K300A me SENE PCB CONTROL Tego TP67 ___ 58 TP40 i 29 20 TP57
30. Connector White JUNE 2002 TOSHIBA TEC 14 13 e STUDIO550 650 810 FUSER UNIT Fuser unit 1 Remove 2 screws and open the cover forward slowly 2 Remove 4 screws and release the IH coil fuser harness Disconnect 2 connectors 2 3 Remove 1 screw and open the cover 2 forward 192 0000000 4 Remove 1 screw move the fuser unit forward and lift it off upward Notes 1 Make sure that the harness A at the right figure does not touch the bearing and shaft of the transfert transport unit when installing the fuser unit 2 Remove the fuser unit after fully lowering the temperature or wear gloves and such when removing it at a high temperature 3 Hold B sections of the fuser unit when installing removing it C Cleaning web unit 1 Remove 2 black screws and take off the cleaning web unit Note The cleaning web unit can be taken off without removing the fuser unit 2 Remove 4 E rings and take off the cleaning web 3 Remove 2 E rings and take off the bushing and Cleaning web gear Caution Be carefull not to slack off the cleaning web when installing it D O SN e STUDIO550 650 810 F
31. e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 14 JUNE 2002 TOSHIBA TEC 5 Remove 4 screws 2 in the front and 2 in the rear side and take off the guide Remove 2 E rings 1 in the front and 1 in the rear side and take off the transport roller 6 Disconnect 1 connector remove 2 screw and take off the solenoid B Transport unit 1 Disconnect 1 connector and remove 2 screws to take off the transport unit JUNE 2002 TOSHIBA TEC 9 15 e STUDIO550 650 810 PAPER FEEDING SYSTEM 2 Remove 1 E ring disconnect 1 connector and release the intermediate transport clutch Note 1 When installing the clutch fit the stopper on it completely 2 Make sure that the E rings are tightly fit not to be loosen and one end of E ring does not ride too much on the flat part of shaft C Bypass feed unit 1 Remove the bypass feed unit 2 Remove 1 clip and 1 bushing and displace the
32. New toner supply motor Toner recycle hopper motor Recycle toner transport motor 31 7 HTR FAN MOT Cooling down of the copier inside F 1 Heater fan motor e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 16 JUNE 2002 TOSHIBA TEC M4 M5 M6 M7 9 M10 M12 4 M13 1 M14 M15 1 M16 3 M17 M18 4 M19 4 M20 4 M21 Symbol Name Names Function Remarks ADU FAN MOT 1 Cooling down the reverse section 5 12 1 be e kaa Ld E Cooling down the reverse section 15 12 F 1 M24 EXIT FAN MOT Cooling down of the exit section 31 7 F 1 pee Laser unit fan motor oe M27 DUCT IN FAN MOT Cooling down of the copier inside 40 25 1 PR EI 0 E System fan motor mv DEV FAN MOT pun of the toner in the developer 40 13 F 1 Developer unit fan motor qam Tiez IH fan motor Cooling down of the SLG board 32 10 1 M32 END F MOT Moving of the end fence 9 22 F 1 JUNE 2002 TOSHIBA TEC 2 17 e STUDIO550 650 810 OUTLINE OF THE MACHINE eke 2 Sensos and switches Symbol original detection sensor Carriage home position sensor Transport sensor 1 paper transport path Transport sensor 2 paper transport path Web detection sensor detection Fuser unit exit sensor S8 ON OFF of the copier AC power 28 11 F 5 Main switch supply 5 DOOR SW Remarks B 2 CO
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34. exc WAN JUNE 2002 TOSHIBA 16 85 e STUDIO550 650 810 RADF Mylar and mirror seal l 1 Mirror seal for original length sensor 0 0 5 guide 0 0 5 Mylar e STUDIO550 650 810 RADF 16 86 JUNE 2002 TOSHIBA TEC 1 2 Mylar for read sensor the mylar aligning the edge of it with the corner end of the guide Dispositioning from the corner end of the guide is not allowed Platen outside guide Attatch the mylar passing through the guide window to prevent twisting and too strong contact on the edge of the guide window Mylar JUNE 2002 TOSHIBA TEC 16 87 e STUDIO550 650 810 RADF 1 3 Mirror seal for large original exit sensor 0 0 5 mm Attach the mirro
35. pejgeue io loool J gt Po ene Po pot or __ doc dL dol Lol Lc lol pereo je somes Be jeuondo jou doo ste BuiAdos Apeay dn 1 dn Koy Koy Koy joued 191409 10 aye S 4015 501515 90 09 95 0020 4 uono sed g uoneJedo 5 3 Relation between Copier State and Operator e STUDIO550 650 810 CONTROL PANEL JUNE 2002 TOSHIBA TEC 5 4 Operation 5 4 1 Dot LCD circuit 1 Structure The DSP LCD 320 is an STN blue mode transmissive type LCD with a 320 x 240 dot display capacity It consists of a driver LSI frame printed circuit board and lateral tyoe CFL backlight STN Super Twisted Nematic 2 Block diagram LCD PANEL 320 x 240 DOTS e STUDIO550 650 810 CONTROL PANEL 5 8 JUNE 2002 TOSHIBA TEC 3 LCD drive operation The following describes the drive operation to display the message READY PWA F SYS 340 a The System CPU requests the PROM data to display READY 6 The PROM outputs data to display the message to the System CPU c The System CPU writes the data to b
36. CO CO Turning OFF of the AC power supply F 5 Front door switch when opening the front cover Interlock switch 510 EXIT SNR Paper detection at the exit section 15 25 F 3 Reverse sensor 1 A 12 RVS SNR Paper detection at the reverse section 15 14 F 3 Reverse sensor 2 13 EXIT COV SW Cover open close detection at the 15 11 3 Exit cover switch exit cover S 514 DEV SW Detection of the developer unit F 3 Developer unit switch presence or absence D 5 Iu CO O S15 TNR SW Toner cartridge detection F 3 Toner cartridge switch S17 ATTNR SNR Toner density detection 42 26 F 3 Auto toner sensor S18 TNLVL SNR Toner adhesion amount detection 49 1 Image quality sensor O F 3 S16 DRUM SUF SNR Detection of the drum surface 5 13 F 3 Drum surface potential sensor potential S19 CH HOME SW Detection of the wire cleaner home 37 13 3 Wire cleaner home position switch position S20 MID TR SNR Paper detection at the feeding section 17 Intermediate transport sensor S21 RGST SNR Paper detection at the registration 16 Registration sensor section S22 TR BELT SW 1 Transfer belt release position 18 3 F 3 Transfer belt release switch detection e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 18 JUNE 2002 TOSHIBA TEC 2 TI 2 Smbo Transfer belt contact switch detection Toner bag full detection s
37. C Exit side top cover Exit side rear cover Exit side bottom cover Exit side top cover 1 Remove 2 screws and take off the exit side rear cover top cover 2 Remove 1 screw and take off the exit side rear cover 3 Remove 6 screws and take off the exit side g 10 bottom cover Exit side bottom cover JUNE 2002 TOSHIBA TEC 2 27 e STUDIO550 650 810 OUTLINE OF THE MACHINE Rear cover 1 Loosen 1 screw shown by a white arrow remove 6 screws release 2 hooks and take a w off the rear cover E Right top cover 1 Remove 1 screw and take off the right top cover F Left top cover Left top cover 1 Remove 1 screw and take off the left top Ng cover e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 28 JUNE 2002 TOSHIBA TEC 2 6 2 PC boards A System control board SYS board Hard disk Logic board LGC board 1 Remove the rear cover 2 Disconnect 1 connector 3 Remove 2 screws shown by 2 white arrows loosen 14 screws and take off the rear feed side inner cover plate cover 4 Remove 1 screw shown by a white arrow loosen 8 screws and take off the rear exi
38. bypass transport roller 3 Remove 2 clips and 1 bushing and take off the pickup feed roller unit I 11 4 Remove 3 clips and take off the pickup roller 5 Remove 3 clips and take off the feed roller One way clutch Feed roller Notes 1 When installing the rollers be careful not to use the bushing of a wrong material 2 Install the feed roller for the one way clutch to come to the rear side Pickup roller e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 16 JUNE 2002 TOSHIBA TEC 6 Remove 1 clip disconnect 1 connector take off 1 harness band and release the bypass feed clutch Harness band 7 Remove 5 screws disconnect 1 connector and take off the stay 8 Disconnect 1 connector and remove 2 screws to take of
39. lt se x 2 44 S47 S45 546 side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 12 JUNE 2002 TOSHIBA TEC F 4 board o I 2 Rear side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 13 JUNE 2002 TOSHIBA TEC 5 Other paris THM4 side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 14 JUNE 2002 TOSHIBA TEC Reversing automatic document feeder SSOL DFOPSW TRYS SSBS APS EMPS LNGS D LSOL JUNE 2002 TOSHIBA TEC 2515 e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 3 Symbols and Functions of Various Components The column lt gt shows the page and item number in the parts list 1 Motors Fania EC Scanner motor Polygonal motor Web motor El eee pr Feed motor aa Cassette tray up motor 2nd cassettes EE 4 Casette tray up motor 2 RGST MOT Driving of the registration roller 6 Registration motor Developer unit motor DRUM MOT Driving of the drum 39 18 F 1 Slimmer em Transfer belt cam motor Reverse motor Used transport motor the transfer belt cleaning blade KNA etme ES Exit motor Fuser motor Transfer belt motor Cleaning brush drive motor brush CH CLN MOT Driving of the charger wire cleaner 37 8 F 1 OO
40. 1 Open the platen sheet and remove 1 screw fixing the band 2 Move the platen sheet toward the direction of the white arrow to deflect the fulcrum and take It off 3 Remove 2 screws and take off the scanning end guide 4 Remove 4 screws and take off the small original transport guide Scanning end guide i e STUDIO550 650 810 RADF 16 82 Small original om transport guide 2002 5 Disconnect 1 connector release the latches and take off the intermediate transport sensor G 9 RADF open close switch 4 2 Disconnect 3 connectors 3 1 Remove the ADF rear cover 3 Remove 1 screw and take off the RADF open close switch with the bracket 4 Remove 1 screw and release the RADF open close switch from the bracket lt Installing procedure gt 5 After installing the RADF open close switch to the bracket connect the connectors to it in the alignment shown by the right figure G 10 Large original exit sensor 1 Open the jam access cover 2 Open the reverse guide and unjoint the front side inlet and take off the guide toward th
41. wheel 3 Disconnect 1 connector and remove 3 screws to take off the drum motor with the bracket 4 Remove 3 screws and take off the motor Note When installing the drum motor fix it keeping the bracket in the direction of the white arrow e STUDIO550 650 810 DRUM CLEANER UNIT 11 10 JUNE 2002 TOSHIBA 12 DEVELOPER UNIT 12 1 Construction 12 2 Functions 12 3 Developer Unit Drive 12 4 Motor Drive Circuit 12 4 1 Toner motor 12 4 2 Developer motor 12 5 Auto toner Sensor Circuit 12 5 1 General description 12 5 2 Operation of auto toner sensor 12 6 Disassembly and Replacement 12 DEVELOPER UNIT 12 1 Construction This chapter describes about the following units related to the development process parts control circuit etc Toner cartridge drive unit Toner recycle unit Developer unit Developer material Mixer unit Paddle Transport sleeve magnetic roller Upper Lower developer sleeve Doctor blade Auto toner sensor Scattered toner recovery roller Developer unit drive section Upper developer sleeve Lower developer sleeve D Transport sleeve 2 dg Doctor blade Mixer unit N Auto toner sensor Paddle Scattered toner recovery roller Develope
42. Output to PLG board 3 3VB J408 5pin Output to SLG board 3 3VC 4405 1pin 2pin Output to SYS board 2 5 1V 5 1VB 4405 Output to SYS board and printer board via SYS board 5 1VC J405 7pin Output to HDD 5 1VD J406 1pin 2pin Output to LGC board 408 7pin 8pin Output to SLG board 5 1VF 407 1 Output to PLG board 5 1VG 4407 2 Output to PLG board 5 1VH J409 1 Output to Finisher 3 12V 12VA J405 13pin Output to HDD 12VB 407 6pin Output to PLG board 12VC J408 11 Output to SLG board 12VD J406 8 Output to LGC board e STUDIO550 650 810 POWER SUPPLY UNIT 17 2 JUNE 2002 TOSHIBA TEC 4 24V 24VF J408 1 2pin Output to RADF 24VG J406 4pin Output to LGC board There are 3 output channels which work with the door switch 1 5 1V 5 1VA J403 Output to PLG board 2 24V 24VA J402 pin Output to LGC board 24VB J402 2pin Output to LGC board 24VC 4402 Output to LGC board 24VD J403 1pin Output to PLG board 24VE J404 5pin Output to SLG board 24VH J409 4pin Output to Fnisher 3 36V 36VA J402 7pin Output to LGC board 36 VB J402 Output to LGC board 36VC 4404 1pin 2 Output to SLG board JUNE 2002 TOSHIBA TEC 17 3 e STUDIO550 650 810 POWER SUPPLY UNIT lt lt connector gt gt Not working with the door switch J405 for SYS board J4
43. signal m CPU Toner density signal IC58 Auto toner sensorp 95C063F E TA8428 E IC38 Developer material Developer unit TA8428 IC37 JUNE 2002 TOSHIBA TEC 12 9 e STUDIO550 650 810 DEVELOPER UNIT 12 5 2 Operation of auto toner sensor 1 Functions of the auto toner sensor a Initializing function When the copier is set up or when the developer material is replaced The automatic adjustment is made so that the output of the auto toner sensor input value of the main CPU will be 2 45 to 2 55V for the toner density of new developer material b Toner density stabilizing function During the printing operation Through the following phases the toner density is kept constant Toner consumed gt Toner density decreased Output change of the auto toner sensor depending on the humidity detected gt Recycle toner hopper and new toner supply motor driven gt Toner supplied to the developer unit from the recycle toner hopper and toner cartridge c Toner empty detection release function Toner empty detection in the toner cartridge New toner supply motor driven Output of the auto toner sensor not changed Toner density not changed Toner empty detected Toner empty release New toner supply motor driven Toner supplied from the toner cartridge Output of the auto toner sensor changed Toner density recovering to its normal value Toner empty released 2 Operation of the auto toner
44. pekup roer Registration roller metal Registration roller rubber 7 JUNE 2002 TOSHIBA TEC 9 1 e STUDIO550 650 810 PAPER FEEDING SYSTEM 1 Pickup roller These rollers draw out paper from the bypass tray cassette or tandem LCF and send it to the feed roller 2 Feed roller This roller is placed against the separation roller It transports paper from the pickup roller to the transport roller 3 Separation roller This roller is placed against the feed roller When two or more sheets of paper are sent from the pickup roller the load of the torque limiter of the separation roller is greater than the frictional force between the sheets of paper As the result the separation roller is stopped and the lower paper is not advanced any further When only one sheet of paper is sent from the pickup roller the separation roller rotates following the feed roller 4 Transport roller This roller transports the paper sent from the feed roller to the registration roller b Registration roller The paper sent from the transport roller is pushed against the registration roller which aligns ths leading edge of paper Then the registration roller rotates to transport the paper to the transfer section 6 Bypass feed sensor This sensor detects if paper is set in the bypass tray If it is bypass feeding always comes before cassette feeding 7 Cassette empty sensor This is an emission type sensor and detects the availability
45. 7 4 8 8 87 J 9 8 P Step 9 Step 4 JUNE 2002 TOSHIBA TEC 15 5 e STUDIO550 650 810 EXIT REVERSE SECTION 15 3 Disassembly and Replacement A Exit Reverse unit 1 Remove 6 screws and take off the exit side cover 4 4 LL x 2 Remove 1 screw and take off the fixing bracket 3 Disconnect 1 connector and lift the exit reverse unit to take it off Connector B Reverse section fan 1 Remove the exit side cover 2 Disconnect 1 connector remove 2 screws and take off the fans Connector e STUDIO550 650 810 EXIT REVERSE SECTION 15 6 JUNE 2002 TOSHIBA TEC Sensor 1 Disconnect 1 connector remove 2 screws 1 for the lower sensor and take off the sensors D Gate solenoid 1 Disconnect 1 connector remove
46. Scanner unit B 1 Motor Exposure lamp M31 EXP Rear side B 2 Sensor Switch 1 5 A4 series Rear side LT series Rear side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 6 JUNE 2002 TOSHIBA TEC B 3 board CCD INV Rear side B 4 Other parts DHR DHL THMO4 Rear side JUNE 2002 TOSHIBA TEC 2 7 e STUDIO550 650 810 OUTLINE OF THE MACHINE Laser unit SNS Rear side D Transfer Transport unit S5 S4 53 NG CET CLT2 Rear side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 8 JUNE 2002 TOSHIBA TEC Fuser unit IHCOIL Rear side JUNE 2002 TOSHIBA TEC 2 9 e STUDIO550 650 810 OUTLINE OF THE MACHINE F Copier unit F 1 Motor Fan Un M18 M17 M M20 M16 M15 M26 M21 M22 M27 M14 M28 MS M13 M23 M12 CO M11 Ca NS OS M10 ONO lc M8 M7 M4 M5 M6 M32 Hear side e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 10 JUNE 2002 TOSHIBA TEC F 2 Clutch Solenoid SOL2 SOL1 S SOL4 Rear side JUNE 2002 TOSHIBA TEC 2 11 e STUDIO550 650 810 OUTLINE OF THE MACHINE F 3 Sensor Switch S52 14 15 S17 16 dT Nan 549 550 amp D o 526 577 829 SS S32 533 d S10 535 we S38 De amp S41 Sm 11 1 a 5 3 oe a lt lt d 3 5 lt 5 SS UN 512 3 4 x
47. ee 22 AN S 0000000000 LIS 2 22 8 TPSi C244 f On 1670 7407 7407 di PSTPS 1678 m io 83 1062 TD82308AF R463 5 36 2 ap 100750 2246 8H 1631 TD62385AF 1 7 5 Lo Nas uasssaer R 15 SSSR 55 2 8104 44 am D 109 z oc sz 4 s 52 5 8112 n C36 017 ec 8110 54 mis 8211 c20 3c pa rs6 v 2 HAETIY uss oo 1 4 R214 Ico 8 29 10 50 73 i 117 752 R215 gt 125 5 oz eo gt R218 R211 625 1 1 900 t 17 2H LEN I R218 R649 10 56 O TP18 16 sa 2 7 118218 Rese 1637 TAB428K 2 0836 22 lt 2 34 C58 TMPS5C063FS e IK ve Am Oren ara 25 13 108 a 12 Za 202200 0 a A 1 2 es Ekkkkkkkkie EXE 14 8 045 2 I O 1638 12V 5 M58 zak es 1621 M48Z58Y 10PC1 si urs A84 628 10 50 2 e gt q _ zm R423 I 16140 prnTS Tyg FR 11 5 20MHz 5 H Save 95 930 837 2 agi E EFIEFEFEEES es 1 G E ce Goto e TP18 TP17 S HHH lt DRTMP DRVO
48. reu 157 104 M62354 OQ 161 924 wo a 5 L51 LC22017CT RB2 x f mo TP6 OTP28 rs OOOO s N 9622 TP36 TP38 ol a 7 70 TP39 v 22 oo U OOM a O Oris Orrte 40 50 IC9 C R45 s TP61 IE eg IC7 HC4051 1 6 339 E TP45 M37920FGCGP C131 M 130 0000 Sess H HLA RAS JA RA2 o res 2 TP62 Tapa OSC2 TP2 ane resa 79 19 RAS 15 11 RAS FUSE lt TP3 o C107 at O O C 0 STK672 080 SLA7032M 1614 SLAT032MT cg L 24 STK672 210 SLA7032M 1013 1215 _ _ _ _ _ _ JUNE 2002 TOSHIBA TEC 18 7 e STUDIO550 650 810 PC BOARDS R02032111900 TTEC TOSHIBA TOSHIBA TEC CORPORATION 1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8442 JAPAN
49. Though the applied voltage changes as current is constant the voltage change Is normally within the range 2 to 5kV 510 voltage is applied to the follower roller by the varistor A voltage probe is required for measurement To prevent danger do not use a digital voltmeter 3 Transfer belt cleaning mechanism The cleaning mechanism has two functions a function for scraping off residual toner and paper dust from the belt surface by the cleaning blade and cleaning brush and transporting the used toner with the recovery auger and a function for bringing the transfer belt into contact with and separating from the drum 4 Cleaning blade After the paper is separated the cleaning blade removes paper dust and foreign matter remaining on the belt surface 5 Cleaning brush The cleaning brush is electroconductive for electrostatically cleaning the toner A voltage opposite to that of the toner is applied to the toner The current flowing to the brush is controlled to a constant current of 5uA Though the applied voltage changes as current is constant the voltage change is normally within the range 100 to 500V A voltage probe is required for measurement To prevent danger do not use a digital voltmeter 6 Recovery auger The recovery auger transports the scraped toner to the used toner transport auger section 7 Transport guide The transport guide guides the paper that is held in contact by static electricity to the fuser unit
50. Various image formation conditions Main CPU JUNE 2002 TOSHIBA TEC 11 5 e STUDIO550 650 810 DRUM CLEANER UNIT 11 5 Disassembly and Replacement A Cleaner unit 1 Open the front cover and take off the front side right inner cover toner cartridge drive unit toner recycle unit developer unit and main charger 2 Remove 2 screws and pull out the cleaner unit B Drum thermistor Drum Connector 1 Disconnect 1 connector and remove 1 screw Drum thermistor Then take off the drum thermistor with the bracket 2 Turn the cam to release the pressure of the Drum shaft cleaning blade 3 Remove 1 screw and take off the drum shaft 4 Pull out the drum upward e STUDIO550 650 810 DRUM CLEANER UNIT 11 6 JUNE 2002 TOSHIBA TEC 5 Remove 3 screws and take off the front side flange 6 Pull out the drum upward C Cleaning blade 1 Pull out the drum 2 Remove 4 screws and take off the cleaner top cover 3 Turn over the cleaning blade with holding the bracket 4 Remove 1 screw WA 5 Pull out the cleaning blade with holding each foot of 2 screws Cleaner top cover JUNE 2002 TOSHIBA TEC 11 7 Foot of screw e STUDIO550 650 810 CLEANER UNIT D Recovery b
51. YES Small original exit aM roller passed YES Small original exit motor stopped Trailing edge control for small original discharging completed e STUDIO550 650 810 RADF 16 56 JUNE 2002 TOSHIBA TEC 16 10 Timing Chart a Two sheets of single sided original 669 6 57 Loco 8661 259 ZLS 2 77 626 1000 dE Tee 1626 8p 8181 ___ __ __ NE ___ 1082 8881 5 000 0009 0005 000 0002 0002 0001 0 NO 5 JO 5 J0suas IO S Josues H MOO 1M9 dois JOJOW ews 71 MO H MO NO 105095 Jodsue1 440 NO Josues 110 NO 1 8105 440 5 1 440 1 dois 71 MO H MO piouajos x NO euBis ues 4JO H1S NOS jeuBis 11816 0015 MO peau H MO 156 Josues Josues uomneuisiDe 440 A Josues u
52. 5msormore Smsormore 11 4V or more gt 11 4 more X 12V MAIN 2 Omsormore 21 6V more ya 24V MAIN t7 216V or more 2 PWR DN T ME E Within 200ms 4 95V or more 4 95V more Wih 5 1V DOOR E 21 6 more E 21 6V or more 0 200ms AC 2 E 7 4 24V DOOR a 34 2V more 34 2 y 77 36V DOOR j A e STUDIO550 650 810 POWER SUPPLY UNIT 17 8 JUNE 2002 18 PC BOARDS 18 PC BOARDS 1 PWA F SYS 340
53. 8158 5858 2818 1815 0818 GLIN LLI SLIN SLIN e es ELITY ZLIN e OLIY GSTS GITY ur 55 S 289 952 4 ne 9 OOO N 88 LE VU x IH MM M oe HAH L 9f Seu 4 8 8 28 Ja 68 He He He He 235 019 T iis 0914 TE o 919 eg gt ss EN SeN 2 660 o 185 f T v i L01 Nd 269 9 Ie 3 I 1691 yg 91 Lid 919 b on 20120654 BBB 6 uu 18 x as then ety ZEH S tdi t9 9 8 I gt 51 b i t 91 i 089 tezo I I ToT lid 014 d j 02 I LA 109661 o SZIOHA d 20319 291 Oe gia tend ETE 1 He HHH SH 5901 5 basra dENPLEINOHPSY 0691 A sse 391 Ld 601 oe T LO en H gt lt TET aaa artis T 5 23 Ad41082n8 zi 819 I para een 2X gt 7 GODHA 22901 259 zHN9690 8 221 ZO 8121 1 na Tota H TO 2n 891 S 2s1V 5 191 2619 p 52418 HA e p
54. HTRMT Motor OFF Motor low speed ON HTRML Motor OFF Motor ON e STUDIO550 650 810 FUSER UNIT 14 12 JUNE 2002 TOSHIBA TEC 14 6 Disassembly and Replacement A IH control board 1 Open the front cover turn the handle clockwise and take off the transfer transport unit 2 Remove 2 screws and open the cover forward slowly 3 Remove 4 screws and release the IH coil fuser harness Cautions 1 When installing the IH coil fuser harness be careful not to install it to a wrong place 2 Tighten 4 screws of the IH coil fuser harness completely tightening torque 1 2 2 0Nm 3 Since the IH control board is a high voltage section make sure to pull out the power cable at maintetance and checkup especially be careful not to touch the IGBT in turning on electricity at which it becomes high voltage 4 Disconnect 4 connectors remove 9 screws and take off the IH control board Connector Yellow
55. Voo A4 Series Reflection type Reflection type photosensor photosensor Fig 6 6 2 Original size detection circuit JUNE 2002 TOSHIBA TEC 6 11 e STUDIO550 650 810 SCANNING SECTION 4 Series LT Series Fig 6 6 3 Sensor detection points e STUDIO550 650 810 SCANNING SECTION 6 12 JUNE 2002 TOSHIBA TEC 4 Original size is determined by the combination the presense absence of signals which are output at each detection point The combination chart for size determination of A4 series and LT series are as followed A4 Series When the APS operation sensor is OFF The following points are determined by the output signals from APS sensors Size The combination of the signals satisfy the above chart Size is displayed on the control panel and an appropriate paper and reproduction ratio are selected Size retention The combination of the signals do not satisfy the above chart Retains the latest original size recognized or no original state until a new paper size is recognized No original output from all the sensors are 1 Reproduction ratio and paper size are not selected Size change is always observed and detected Carriage 1 stays at the standby position even if the reproduction ratio changes corresponding to the change of the original size When the APS operation sensor is ON Retains the latest original size or no original state recognized right before the APS operation s
56. cleaner unit and control panel bottom cover 2 Disconnect 1 connector remove 1 screw and take off the bracket Bracket 3 Disconnect 2 connectors remove 1 screw and Developer 1 take off the developer unit switch Toner filter unit 1 Remove the feed side rear cover 2 3 4 Disconnect 1 connector of the fan 5 Pull out the toner filter Remove 2 screws and pull out the filter duct Filter duct Remove 3 screws and take off the fan JUNE 2002 TOSHIBA TEC 12 21 e STUDIO550 650 810 DEVELOPER UNIT 13 TRANSFER TRANSPORT UNIT 13 1 General Description 13 2 Operation 13 3 Functions 13 4 Disassembly and Replacemeni 13 TRANSFER TRANSPORT UNIT 13 1 General Description Transfer Transport unit consists of the transfer belt unit fuser unit and transport path through which duprex printing is carried out This chapter excludes the description of the fuser unit 6 Recovery aur Fig 1 Belt transport unit sectional view 13 2 Operation While the copier is ready the transfer belt stands by at a position separated from
57. 2 FANE ic uar uk ERES 3 Per poe te ic d qub ae _ D 1 aay 1 ct21 124 1 RE e e e 2 SGND TP29 R89 ae 2 2 3 EE SGND This circuit controls the rotation stoppage the direction of the rotation of the feed motor and the motor current The drive pattern signal is input into 1 15 6 7 8 9 to control the speed and direction of the motor rotation PWM signal is input into FMOT CU and separated and smoothed at R89 R87 and C87 it is input into IC15 12pin Vref to set the motor current value The motor current value can be changed by altering duties of the PWM signal e STUDIO550 650 810 RADF 16 64 JUNE 2002 TOSHIBA TEC 5 Drive circuit for large original exit motor small original exit motor and tray lift motor Since the large original exit motor small original exit motor and tray lift motor have almost the same circuitries the drive circuits for the small original exit motor and tray lift motor are not described The following is the drive circuit for the large original exit motor NUM m 5 Vi 8 6 ES AD InA aka rx pus ee loeo bees 128 cto ctos SGND CUD This circuit controls the rotation stoppage the direction of the rotation
58. JUNE 2002 TOSHIBA TEC 4 5 e STUDIO550 650 810 GENERAL OPERATION 4 3 Abnormality Detection When an abnormality occurs in the copier a symbol corresponding to the type of the abnormality is displayed to draw the operater s attention 4 3 1 Abnormality classification A Abnormalities which can be cleared without resetting the door switch 1 Add paper 2 Paper misfeed in bypass 3 Set key copy counter B Abnormalities which cannot be cleared without resetting the door switch 1 Misfeed in copier 2 Developer unit not installed properly 3 Add toner C Abnormalities which cannot be cleared without turning OFF the main switch 1 Call for service 4 3 2 Abnormality description A 1 Add paper Empty sensor detects the presence or absence of paper When cassette is not installed No Cassette detected Y Tray not going up empty sensor OFF Y Add paper displayed Y START key disabled When cassette is installed Cassette detected Y Tray going up empty sensor OFF Y Add paper displayed Y START key disabled e STUDIO550 650 810 GENERAL OPERATION 4 6 JUNE 2002 TOSHIBA TEC e When power is turned ON or feed unit initializing is operated 4 Presence or absence of paper detected Tray motor ON Tray going up When tray up sensor is not turned ON within a certain period of time Tray being abnormal Add paper displayed regardless of paper being present or not 2 Turn and OFF the power to clear th
59. YES Feed motor acceleration ge completed Size detected YES Size detection succeeded Read motor forward rotation Read motor stopped Reversal without reading started Control for Reached the 15 roller scanning started YES Control for pre feeding Pre feeding control from the 1st roller completed from the 1st roller started Control for pre feeding from registration roller completed e STUDIO550 650 810 RADF 16 46 JUNE 2002 TOSHIBA TEC 7 Trailing edge control for pre feeding Trailing edge control for pre feeding started Original trailing edge passed NO 2 T original length sensor small original YES Original length data acquired Feed motor stopped Small original Next original detection started Feed motor stopped Midpoint between registration roller and the 1st roller passed Next original detection started pe Registration sensor OFF Trailing edge control for pre feeding completed JUNE 2002 TOSHIBA TEC 16 47 e STUDIO550 650 810 RADF 8 Control for next original detection Control for next original detection started Lifting tray up YES NEM Specified time passed YES Next original Lifting tray up completed Lifting tray down Lifting tray down completed original separation started Control for next original detection completed e STUDIO550 6
60. 600dpi 500pixel 6 HMM wring _ Pw 3 8nJ mm Carrier Transfer Transfers the visible image on the photoconductive drum onto a paper Separation Separates the paper from the drum together with the toner Y Fusing Fuses the toner on the paper by applying heat and pressure Y Fur brush cleaning Cleans dirt and paper dust on the drum Y Blade cleaning Forcibly removes the residual toner on the drum Y 10 Discharging Discharges any remaining negative charge on the drum e STUDIO550 650 810 COPY PROCESS 3 2 Details of Copy Process 1 Photoconductive drum The photoconductive drum has two layers an outer and an inner layer The outer layer is a photoconductive layer made of an organic photoconductive carrier OPC The inner layer is an aluminum conductive base a cylindrical form The photoconductive carrier has the characteristic that its electrical resistance changes depending on the strength of the light exposed Example Strong light Resistance is decreased works as a conductor Weak light Resistance is increased works as an insulator Formation of electrostatic latent image In the processes of charging scanning printing and discharging described below negative potential on the areas of the drum corresponding to black areas of the original is eliminated while the areas of the drum corresponding to white areas remains the negative charge As this ima
61. ZS pl m Sy 2 4 Pull out the IH coil Note Make sure that the and S harnesses of the power supply harness comes to the left side when installing the IH coil e STUDIO550 650 810 FUSER UNIT 14 16 JUNE 2002 TOSHIBA TEC E Upper separation finger unit 1 Remove 2 screws and take off the crank plate and upper separation finger unit Crank plate Upper separation finger unit 2 Remove each spring and take off each separation finger Upper separation finger F Cleaning roller metal Lower separation finger 1 Remove 2 screws and open the guide gt pi COUR aN gl Te 2 the cleaning roller metal Cleaning roller metal 3 Remove each spring and take off each lower separation finger Lower separation finger JUNE 2002 TOSHIBA TEC 14 17 e STUDIO550 650 810 FUSER UNIT 4 Remove 2 E rings and take off the exit roller x Exit roller G Cleaning roller felt 1 Remove 2 screws and open the entrance lower guide unit Al o
62. control during scanning Trailing edge control during scanning started Original trailing edge on separation side Original trailing edge passed the 1st roller Transported to large NO original ekit side Read motor accelerated until mak speed Read sensor OFF m Large original exit motor accelerated until max speed YES Scanning position passed Disengagement solenoid OFF YES Scanning start signal reset JUNE 2002 TOSHIBA TEC 16 51 e STUDIO550 650 810 RADF The 3rd roller passed YES ransported to large original exit side The 4th roller passed The 3rd roller pass a margin passed Trailing edge control The 4th roller pass during transporting started margin passed Trailing edge control for large original discharging started Trailing edge control during scanning completed e STUDIO550 650 810 RADF 16 52 JUNE 2002 11 Trailing Control for large original discharge Trailing edge control for large 6 original discharging started Large original exit 2 YES motor decelerated Back side aligned NO gt Large original exit Large original exit motor arge original sensor OFF motor forward rotation forward rotation YES Read motor forward rotation Original reversed YES Large original exit E sensor ON Large original exit aM roller passed A
63. gt means Not acceptable 81 81 61 56 52 45 43 37 81 81 Size specified Copies min Bypass feeding Size not specified CO Co IN Each copy speed described in the table of the previous page is available when doing a multiple copying of the manually placed single sided originals and in this mode only the top side discharging is carried out When using the automatic document feeder each copy speed of 55 65 81 copies min is available only when the following conditions are met Original Mode Single sided original A4 LT size 1 sheet APS and automatic density are not selected e Preset number of sheets 55 65 81 or more Reproduction ratio System copy speed Copy mode Single sided originals Y Single sided copies Single sided originals Y Double sided copies Double sided originals Y Double sided copies Double sided originals Y Single sided copies e STUDIO550 650 810 SPECIFICATIONS 100 18786 40717 61792 21728 42 91 64 89 35 2 8 61 121 96 31 77 74 75 117 88 16 81 35 99 93 56 20770 39 47 57 70 35721 71 70 108 01 31 49 67 97 104 64 e STUDIO e STUDIO e STUDIO 550 650 810 15 96 30 52 45 19 20 46 36 37 49 48 34 36 63 89 95 06 30 88 60 58 90 02 System copy speed including scanning time is available when 10 sheets of A4
64. polygonal mirror and polygonal mirror cover a Polygonal motor This motor rotates the polygonal mirror in high speed The DC motor controls the rotation speed of the mirror motor as follows During standby 10 000 000 rpm approx During copying 37 216 337 rpm approx b Polygonal mirror Laser beams emitted from the laser diode are reflected by this mirror As the polygonal mirror is rotated by the polygonal motor the reflected laser light moves in sync with the rotation The direction of the movement is the primary scanning direction of the image Two scan is performed on one plane of the polygonal mirror As the polygonal mirror has eight planes sixteen scans are performed in one rotation of the polygonal mirror c Polygonal mirror cover Polygonal mirror cover reduces the windage loss and noise prevents adhesion of foreign objects onto the mirror surface and releases heat e STUDIO550 650 810 LASER OPTICAL UNIT 8 A Drum Laser light B Drum Laser light C Drum Laser light Fig 8 2 1 2 scan is completed by completion of steps A to C 2 scan is performed on one plane of the polygonal mirror 16 scans can be made with one rotation of the polygonal mirror 4 JUNE 2002 TOSHIBA TEC 3 f2lenses 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 fo
65. requency Speed circuit Excited MUWUL d Difference unit 22 Rotation Bota 9 control position lt detector Hall element 1 The LGC transmits control signals for the developer motor rotation DEVON motor rotation com mand 2 The excitation phase switching unit excites each phase on the developer motor Developer motor rotates 3 Hall elements A to C are used to detect the rotational position of the motor rotor 4 The excitation phase switching unit switches the excitation for each phase By repeating steps 2 through 4 above the motor keeps rotating 5 The FG pulse is generated by the rotation of the developer motor 6 The phases and velocities of the FG pulse and the reference frequency from the LGC are com pared and the differences are added Further to this are added the fluctuations in the power supply voltage signal generation 7 Changes the switching timing for the excitation phase switching unit to match the signal amount obtained in step 6 That is the FG pulse and reference frequency are controlled to be equal The developer motor rotates at a constant speed locked range state 8 When the DEVON signal changes to level the developer motor stops JUNE 2002 TOSHIBA TEC 12 7 e STUDIO550 650 810 DEVELOPER UNIT lt Control signals gt 1 DEVCK signal LGC DEV MOT input This signal is a reference clock signal for the developer motor to rotat
66. supplied via the door switch consisting of the outputs of 3 voltages 5 1V 24V and 36V which start up when the main switch is turned ON with the door switch being ON 17 2 Operation of DC Output Circuits 1 Start of operation When the main switch of the copier is turned ON and if the door is closed all the power supply systems start up at the same time 2 Stop of operation When the main switch of the copier is turned OFF a power OFF signal PWR DN is output after an instantaneous outage insurance time 20 ms mini has elapsed After the power OFF signal has been output the main system power supply is allowed to retain its rated voltages for the minimum retaining time 50ms or more and then lets them start dropping 3 Output protection Each output system includes an over current protection circuit a fuse and internal protection circuit and an over voltage protection circuit This is to prevent abnormal operation or damage to the secondary circuit which may be caused by an over current due to a shorted load or an over voltage due to a short circuit between different voltages If the protection circuit has been activated and the fuse is not blown out remove the cause of the short circuit and turn ON the power again to clear the circuit JUNE 2002 TOSHIBA TEC 17 1 e STUDIO550 650 810 POWER SUPPLY UNIT 17 3 Output Channel There are 4 output channels which do not work with the door switch 1 3 3V 3 3VA 407
67. 1 clip and take off the bushing 6 Push the brush to the rear side take off the front side shaft and pull out the brush upward Note Do nottouch the top of the brush with bare hands D Cleaning blade 1 Remove the transfer belt keeping feeding section 2 Remove 3 screws and take off the cleaning blade Notes 1 When installing the cleaning blade make sure that both sides of the bosses are fit in and screwed shut 2 Do not touch the blade with bare hands and make any scar on it 3 Be careful not to mash the urethan seals at both sides Urethan seal e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 6 JUNE 2002 TOSHIBA TEC E Damp heater 1 Remove the transfer belt unit 2 Remove 2 screws disconnect 1 connector and take off the damp heater Note When installing the dump heater be careful not to catch it in the harness N S Connector F Transter Transport unit 1 Open the front cover turn the lever clockwise and pull out the transfer transport unit 2 Remove the fuser unit and transfer belt Note When removing the transfer tr
68. 2 Two phase motor drive circuit fixed current type The scanner motor with the unipolar fixed current chopper method is driven by the stepping motor driver STK672 080 4 am NMd QUIS JUSUNO jo uoneJeuet Jejunoo uomelloso YO JOWUOW 6118165 440 asind e STUDIO550 650 810 SCANNING SECTION JUNE 2002 TOSHIBA TEC PWA F SLG SCNREF 0A Motor B Scanner CPU driver Ico Input signals SCNCLK 0 CLK input SCNDIR 0 Sets the direction of motor rotation Circuit diagram The motor is rotated by setting the number of pulses The internal circuit of the motor driver works at the rising and falling edge of pulse The direction of the motor rotation is determined by the setting level of signal H Clockwise direction as seen from the output shaft L Counterclockwise direction as seen from the output shaft Note When SCNMD3 0 is do not change the rotation direction within 6 25us before and after the rising and falling edge of the pulse of SCNCLK O SCNREF 0A Voltage to set value wire current value is set in the range of 0 to 2 25 A phase by for the motor current applying the analog voltage 0 to 5 V SCNMD1 3 0 Sets the exicitat
69. 5i Jose TAB829H R598 sie 1626 annann DNA 16155 1 145 Jute 115 2442 re TOSHIBA 5 ha mang OT 1030000 5 hr ad kir 014 25 1927 eleleleleielele 4 17 PW F GC 340 25 our Hie Hs He Hie He Hie He Ha N He aja aaa ana He He He He He He He He c Sete PREE AMSA 628 N 00000000 E HO278 IN 4 sses 1 59 e te io to e LOT CAS 629H EEEE TATSSSSFO HAH 52222 ES 33 032 TPT 52222 Saone seen p ass r1 z FCOV ec ec ec conn i61 1680 2 71 9 47 C218 165 1651 HAH 1619 uc24a9 1 2 013 e c4 247 HC244 s 49835 71 9 lhcz44 2 HC245 5 70 2 aset D18 1074 Md 166 082308 d 1650 TD62503F yc244 0 2 HH e eo Hie z HH ee seio 55 gp o5 x e dH 5 HH J m St gaan se Le gt ness AL M LI 86834 2 M 50 SM EEEE E 820 Q17 TP78 12 10 815 VDD GND 022 027 818 019 E G FR 0636 hd gt 2 18 sa 29 1 O 18 814 10 2 20 30 31 21 m i ail 12 10 3338 4828 21 J 28 1 4350 4827 e STUDIO550 650
70. 650 810 RADF Signal logic Connector level 5V 1 Connector level OV 0 DFOPNS open close sensor UMTS Uppertimitsensor _ Uppertimt LIMTS Lower limit sensor ITFS Intermediate transport sensor No original SOES Small original exit sensor No original READS Read sensor Original existing SSBS Small original reverse sensor Original existing LOES Large original exit sensor Original existing LNGS Original length sensor Original existing Connector level more than 4V Connector level less than 1V e STUDIO550 650 810 RADF 16 72 JUNE 2002 TOSHIBA TEC 16 13 Disassembly and Replacement A RADF unit 1 Remove the rear cover and disconnect 1 connector 22 Supe V S 2 W ie AS w Connector 2 Remove 2 screws open and move the RADF unit toward the rear side and take it off upward B Covers ADF front cover B 1 ADF front cover 1 Open the jam access cover remove 3 screws and take off the ADF front cover B 2 ADF rear cover 1 Open the jam access cover remove 4 screws ADF rear cover and take off the ADF rear cover JUNE 2002 TOSHIBA TEC 16 73 e STUDIO550 650 810 RADF B 3 ADF left cover 1 Remove 2 screws and take off the ADF left cover
71. 9 Seana R2 E TOET T HHH lt meme ow NN 831 e ae ae ac 9 m gt F1 ae O O O O Ors 1 2802 gt e 2 J al Gl m rk 15585771 HC4058 m FE el Hs mana a s gt VHCOO 32 E k wi 5 e e e sees 5 Wn IP89 C 1 2 5525 5555 e 1045 m 1 lt a 5 gt 1 Eom E 4 SHH TP2 TP24 208 a is 1684 alal alaala 2 ons lest TMP9SCOBSFE jo ATS 6705 1610 y e nas 1667 52 818357 TD62308AF man o Les 81830 dicta 2 ee RRR REE R188 P 1672 TA8428K gt 4825 2 R187 i 17 Wess 2 i Q 16 e 90 5 34 O f He 33 57580 ra o E e es R65 cag 1033 e 10 50 2 luc f x2 wa 5 044 37 20MH2 705 mr i a 21 41 5 55 4 He 1 Te s 2 ae e 65 H q 9 p e attest 1678 2227 10 50 wes 1 MU wu Oe Sue 207 TPS cis 609 BEd PEPER 4 10 50 WP ll 5 1 2 122 25 222222225 Obs 2 1 e e e al fe we 4 ci L 244 ie
72. D RAA CN10 8 51253 p we T 7 D TG C50 E ue TP20 10 SGND 49 RAIG 1 1 17 1 11 4 1500 2 1 CN10 11 REGS iT ANAN 2 D INTO eve san RAL Emh Em E DE gt ac em 1 dui ER C61 2 2 e T ie 5 711 10 1 MEENN AMOR Nene C62 CNI4 6 SGND Iciz 2 1 C42 wc p I CNI4 2 sw 2 SGND RIG cu4 3 A oa X C46 2 CN2 1 44 SGND R20 590 RM gt SHS 1 D PAS 51 1 2 w TP SGND 500 1 ie 1 COPS D P57 cle IV ot C44 R154 Y 165 P P 1 2 RIM 5 LAM SGND TP45 R135 3 EE LUE EE B D PAO 4 l cas 5 21 6 2 SEND 7 MET i C43 SGND T SGND e STUDIO550 650 810 RADF 16 70 JUNE 2002 TOSHIBA TEC 5V 5V R37 ela 2 CN2 6 CN2 5 D SSEN Small original reverse sensor D SSEN SGND SGND SGND SGND 21 D READS 24 READS_A SGND SGND SGND SGND TP23 lt READS DA Head sensor D LOUTS Large original exit XLOUTS Sensor cN12 1 LOUTLED H Q D LOUTS SCND SGND SCND SGND 25 lt LOUTS_DA Original length sensor SGND SGND SGND SGND TP34 SGNDI These are the input circuits from each photosensor JUNE 2002 TOSHIBA TEC 16 71 e STUDIO550
73. DA lt 4 D P5 R32 R30 2 SGND This is a circuit of the D A converter to converse the digital signal from CPU to the analog signal Controls of CPU are done by the serial communications of each DI CLK LD signal The analog output signals Ao1 to Ao4 are used to adjust the light intensity of the light emitting diode LED of the reflective sensor Also 5 and Ao6 output 5V or OV and are used as the output ports 10 Analog multiplexer circuit TP4 TP5 TP70 55 5 E 0 C1LNGS A SGND READS A e C1LOES 3 3 C155EN TP 2 SGND 4 5 2 ANO lt SGND This is circuit to connect to COM with one the four analog input signals As following table shows the digital signals input into IC7 11pin A IC7 10pin B and IC7 9pin C switch the corresponding channels and IC7 3pin COM at a high speed and they are input into the A D input terminal of CPU Each channel signal is an analog output signal of the reflective sensor and used to adjust the sensor automatically JUNE 2002 TOSHIBA 16 67 e STUDIO550 650 810 RADF 16 12 Input Output Signals 1 TXD ACK REQ signals SGND SGND SGND SGND CN1 2 REQ 4 SGND SGND This is an input circuit to communicate with the copier 1 substitutes 5V and 0 substitetes OV The same logic is used in both the connector and CPU input port e STUDIO550 650 81
74. G31 G17 Rear side Transport sleeve gear Idle gear G23 G19 TA REX Scattered toner Idle gear Idle gear Front paddle gear recovery roller gear G20 G30 16 G18 16 G20 Front side e STUDIO550 650 810 DEVELOPER UNIT 12 4 JUNE 2002 TOSHIBA TEC Developer unit drive Motor shaft Idle gear Paddle Developer unit Drive input gear G27 Rear side Rear paddle gear Idle gear 2 Raid A G31 G20 eve ua eeves m Transport Front paddle gear 2 sleeve v G18 G23 Front side 918 geal G16 Ide 930 gear G16 TEN Scattered toner 9 recovery roller G20 G20 JUNE 2002 TOSHIBA 12 5 e STUDIO550 650 810 DEVELOPER UNIT 12 4 Motor Drive Circuit 12 4 1 New toner supply motor The new toner supply motor brush motor is a motor for supplying toner to the developer unit from the toner cartridge It is driven by the motor driver IC38 and its circuit configuration is shown in the following TRSM1A 0 Motor driver New toner supply motor TRSM1B 0 IC38 Signal level for motor circuit TRSM1A 0 TRSM1B 0 OFF Level BE CW when supplying toner CCW detecting cartridge installation Brake e STUDIO550 650 810 DEVELOPER UNIT 12 6 JUNE 2002 TOSHIBA TEC 12 4 2 Developer motor FG pulse Wave shaping Phase Difference comparator DEVCK Reference Current detection
75. It is made of the material that prevents electrification caused by the friction with the paper e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 2 JUNE 2002 TOSHIBA TEC 8 Belt transport unit lock unlock mechanism The belt transport unit is locked inside the copier It is structured in such a way that it is locked when a paper jam is cleared and can be drawn out towards you The belt transport unit has a function for separating the transfer belt from the drum and a function for preventing erroneous operation of the handle when it is drawn out e When the handle is rotated clockwise when viewed from the front the belt transport unit can be drawn out horizontally e When the belt transport unit is inserted into the copier and the handle is rotated in counterclockwise as seen from the front the unit at the vertical position is locked e Ifthe belt transport unit is not completely inserted into the copier the handle cannot be rotated from the horizontal position 9 Damp heater for preventing condensation The damp heater is located under the transfer belt and is powered when the main power switch is turned OFF Standard accessories TWD SAD ASD AUD Options Other than the above 10 Transfer belt drive unit Drive is transferred from the transfer belt motor travels via the timing belt and the relay gears and is transmitted to the transfer belt drive gear to rotate the drive roller Drive is transmitted to the belt transport un
76. Remove 1 screw and release the bracket 4 Disconnect the connector b Release the latches from the back side of the tandem LCF cassette and take off the end fence home position sensor and standby side empty Sensor e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 IF Connector Standby side empty sensor End fence nome position sensor 24 JUNE 2002 TOSHIBA TEC G 7 End fence stop position sensor 1 Disconnect 1 connector remove 1 screw and release the bracket 2 Release the latches and take off the sensor Note Remember that the position where the end fence stop position sensor is installed depends on a paper size G 8 End fence motor 1 Disconnect 1 connector 2 Remove 3 screws and take off the end fence motor JUNE 2002 TOSHIBA TEC 9 25 A4 size LT size End fence stop position sensor Feed side Bracket
77. Tension spring 5 78 JUNE 2002 F Solenoids Small original solenoid 1 Small original exit solenoid 1 Remove the ADF rear cover 2 Remove the ADF board with the bracket 3 4 3 Remove the large original exit motor 4 Remove 1 screw and take off the small original exit solenoid with the bracket DR 5 Remove 2 screws and release the small us original exit solenoid from the bracket F 2 Large original exit solenoid Estrangement Connector 1 Remove the ADF front cover while keeping exit solenoid Solenoid link _ 2 3 the jam access cover open AA 2 Disconnect 1 connector 12 SN 3 Remove 1 screw and take off the large TS SK c 2 8 Original exit solenoid with the bracket 4 Remove 1 screw and release the large ED original exit solenoid from the bracket OUR Ws Disengagement solenoid m Te 3 4 F 3 Disengagement solenoid 1 Remove the ADF front cover 2 Remove the clip and take off the disengage ment solenoid link 3 Remove 1 screw fixing the harness duct release 2 latches and move the harness duct to the right side 4 Remove 1 screw fixing the disengagement
78. a specified number of counts is counted after the upper limit sensor has detected the top side of the original The empty sensor detects whether or not there is a next original when a specified time passes after the registration sensor has detected the trailing edge of the original With a next original separating of the next original begins e STUDIO550 650 810 RADF 16 22 JUNE 2002 TOSHIBA TEC When the trailing edge of the original has passed the scanning section the SCN STR turns OFF and both the read and large original exit motors start to accelerate The large original exit motor slows down when the trailing edge of the original has passed the 4th roller and proceeded a specified distance After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a specified distance Then the original is nipped by the large original exit roller 6 Start of 1st original back side registering Same operation as 16 5 2 6 7 Start of 1st original back side feeding Same operation as 16 5 2 7 8 Start of 1st original back side scanning Scanning begins after receiving the original
79. board One image processing ASIC is mounted on the PLG board realizing the following functions lt Functions gt Smoothing processing external input system interface image area control and laser related control e STUDIO550 650 810 IMAGE PROCESSING 1 52 JUNE 2002 TOSHIBA TEC 7 2 2 Configuration The following diagram shows the image processing section of this copier CCD board PWA F CCD 340 A D conversion Shading correction Image processing SLG board section PWA F SLG 340 Image processing ASIC for scanner section High quality image processing Image memory editing Editing processing Gamma correction Gradation processing External output system interface SYS board PWA F SYS 340 Sorting group copy magazine sorting 2in1 4in1 single sided double sided image composi PLG board PWA F PLG 340 i tion date insertion sheet insertion mode etc Image processing ASIC for printer sction Smoothing processing External input system interface Image area control Laser related control Laser drive board PWA F LDR 340 Image data flow Laser drive Configuration of image processing section JUNE 2002 TOSHIBA TEC 153 e STUDIO550 650 810 IMAGE PROCESSING 7 3 SLG Board PWA F SLG 340 7 3 1 Features 1 The image processing ASIC on the SLG board is controlled by the CPU on the SLG board 2 The image processing ASIC on th
80. board with the bracket 3 Remove the tension spring 4 Disconnect 1 connector remove 2 screws and take off the small original exit motor with the tension bracket 5 Remove 2 screws and release the small Original exit motor from the tension bracket Installing procedure gt 6 Install the small original exit motor to the tension bracket While hunging the timing belt around the pulley of the small original exit motor move the tension bracket fully to the right side and tack it there temporarily with 2 screws 7 Hook the tension spring on the tension brackets 8 Loosen the screws temporarily and tighten them up while stretching the timing belt Note Make sure that the timing belt is not moved to the edges E 5 Large original exit motor 1 Remove the ADF rear cover 2 Remove the ADF board with the bracket 3 Loosen 2 screws move the large original exit motor fully downward and tack it there temporarily 4 Remove 2 screws and take off the large Original exit motor Installing procedure gt 5 While hunging the timing belt around the pulley of the large original exit motor tack the large original exit motor to the tension bracket temporarily with 2 screws 6 Loosen the screws temporarily and tighten them up while stretching the timing belt Note Make sure that the timing belt is not moved to the edges e STUDIO550 650 810 RADF 16 Connector Iti
81. cassette feed roller 2nd cassette separation roller 2nd cassette pickup roller Tandem LCF transfer roller Tandem LCF feed roller Tandem LCF separation roller Tandem LCF cassette pickup roller 1st cassette 2nd cassette 2 Tandem LCF tray JUNE 2002 TOSHIBA TEC Rear side view Drive system D O Mm C O O A E O O JUNE 2002 TOSHIBA TEC 2 3 e STUDIO550 650 810 OUTLINE OF THE MACHINE Scanner motor Drive pulley Drive belt Driven pulley Drum motor Developer unit motor Registration motor 2 3 4 5 6 8 Fuser motor Web motor Exit motor Reverse motor LCF tray up motor LCF end fence motor e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 4 JUNE 2002 TOSHIBA TEC 2 2 Electric Parts Layout A Unit construction Fuser unit Transfer Transport unit Copier unit Hear side JUNE 2002 TOSHIBA TEC 2 5 e STUDIO550 650 810 OUTLINE OF THE MACHINE
82. changed to keep the P Tr output voltage to a certain level and the LED current is adjusted by a voltage current conversion circuit consisting of IC11 R65 Q6 etc Each machine has a different D A output voltage value which is stored in the volatile memory e STUDIO550 650 810 RADF 16 62 JUNE 2002 TOSHIBA TEC 2 Irruptive current control circuit 24 co E PGND PGND 19 PD D 24VOP This circuit controls the irruptive current flowing into the current regeneration condensers mounted on the drive circuits for the motors to a certain value The circuit consists of a posister PTH1 which controls the current and FET Q12 which supplies the current in normal conditions Base current is not supplied to Q2 and it becomes OFF after the RADF open close switch and cover open close switch are turned OFF till the cathode voltage of ZD3 reaches the zener voltage At this time both voltages are set by R36 and C107 012 is turned OFF correspondingly to supply the current to PTH1 and the current regeneration condensers are charged After the current regenerarion condensers are fully charged and when the cathode voltage of ZD3 exceeds the zener voltage after the time allowance given by C107 and R36 a base current is supplied to Q2 to turn it ON and Q12 comes ON correspondingly The current limitation is canceled and the current flowing in the PTH1 starts to be supplied to Q12 R66 R67 R68 and R
83. coil As a result the fuser roller temperature rises possibly activating the thermostat which is a safety protection device To prevent this CPU works to detect if the thermistor is open circuited or not The following is a circuit diagram of the thermistor open circuit detection circuit common with the center and side thermistors The input voltage is obtained by dividing the resistor 1 thermistor resistor 2 and resistor 3 The temperature of the fuser roller surface changes Y The resistance of the thermistor changes Y The input voltage changes Main CPU main CPU detects this change of the input voltage to decide if the thermistor is abnormal or not e STUDIO550 650 810 FUSER UNIT 14 10 JUNE 2002 TOSHIBA 14 5 Fuser Motor Drive 14 5 1 Outline of operation Control signal pulse Reference Current detecting circuit frequency HTRCK HTRML position detection Fuser motor M DC HTR 340N U VW Phase A B C Hall element The LGC transmits control signals for the fuser motor rotation HTRMT Motor rotation command The excited phase switching unit excites each phase on the fuser motor gt Fuser motor rotates Hall elements A to C are used to detect the rotation position of the motor or rotor The excited phase switching unit switches the excitation for each phase By repeating steps 2 through 4 above the motor keeps r
84. cut off the power supply to the IH coil when the fuser roller becomes abnormally hot as the result of a problem such as the thermistor malfunction The thermostats of this copier are used to prevent abnormal operations and when they detect any abnormality they must be replaced altogether with the other damaged parts of the fuser unit JUNE 2002 TOSHIBA TEC 14 3 e STUDIO550 650 810 FUSER UNIT 011U09 HJ pue jo 2 Od OV 44O NO HI 21 5 10 Ajddns esn E 1 indui indino IG 105 101511194 2002 14 4 14 4 Heater Control Circuit 14 4 1 Configuraton OSION 1911 a an 1691 JOJSIWISY SPIS amara 1u0JJ i J9 uo2 e STUDIO550 650 810 FUSER UNIT 14 4 2 Heating principle of IH coil The magnetic field is generated by applying a high frequency current to the IH coil inside the fuser roller which then produces the eddy current in it When the eddy current flows the Joule heat is generated by the resistance element of the fuser roller which is then heated In the IH coil method t
85. disconnect 1 connector 3 Remove 2 pins and lift the bypass feed unit with the feed side center cover to take off 4 Open the feed side bottom cover and lift it to take off 5 Pull out the cassette or tandem LCF completely Note With failing that sensors may be damaged 6 Disconnect 1 connector remove 3 screws and take off the feed unit JUNE 2002 TOSHIBA TEC 9 11 SINIZ PASTAN e STUDIO550 650 810 PAPER FEEDING SYSTEM 7 Remove 1 clip and take off the pickup roller 8 Remove 3 screws and take off the guide 9 Remove 1 clip and take off the feed roller Feed toler 10 Remove 1 clip and take off the separation roller QQ Separation roller e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 12 JUNE 2002 TOSHIBA T
86. end of E ring does not ride too much on the flat part of shaft Transport clutch 2 Transport clutch 1 H 2 Drive clutch 1 Remove 1 E ring and 3 screws and release the bracket 2 Disconnect 1 connector and take off the drive clutch Notes 1 When installing the clutches pay attention to the color of harness 2 When fitting the E rings on the clutches make sure that the latches of E ring do not protrude on the flat part of shaft Drive clutch JUNE 2002 TOSHIBA TEC 13 9 e STUDIO550 650 810 TRANSFER TRANSPORT UNIT Transfer belt drive motor unit Connector m 1 Remove the rear cover and take off the flywheel 4 2 Disconnect 1 connector remove 1 spring and 2 screws and take off the drive motor unit Note When installing the motor rotate it counterclock wise to fix J Transfer belt contact release cam drive unit 1 Remove the rear cover and take off the flywheel 2 Disconnect 1 connector remove 2 screws and
87. from the pickup position where the empty sensor detects the original to the original length sensor 2 Original jammed not reaching the registration sensor Jam detection This jam is detected during the time after an original comes to the position 10mm short of the registration sensor 24 6mm further from the original length sensor until it reaches the registration sensor Jam timer setting The setting value for the jam timer is three times as much time as it takes to transport an original from the middle position between the original length sensor and registration sensor to the registration sensor 16 6 2 Jams at transporting section 1 Original jammed at the original length sensor Jam detection This jam is detected during time after the feed motor starts to rotate in reverse so that the registration roller starts to transport an original to the read roller until the trailing edge of the Original passes through the original length sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for the longest original LD to pass through the original length sensor and proceed more 60mm 2 Original jammed at the registration sensor Jam detection This jam is detected during the time after the original passes through the original length sensor until it passes through the registration sensor Jam pulse setting The setting value for the jam pulse is the equivalent number
88. leading edge of the original then the original has proceeded a specified distance and been registered the large original exit motor stops rotating 7 Start of 1st original back side feeding Both the large original exit and read motors start to rotate forward and when the leading edge of the original has come to a specified distance before the read sensor they start to slow down They stop to rotate when the leading edge of the original has reached the read sensor then the original has been transported a specified distance by the read motor At the same time the original stop signal is set Sa 8 Start of 151 original back side scanning Scanning starts after receiving the original transport signal from the copier At the same time the Original stop signal is reset When the read motor starts to rotate forward the large original exit motor also starts to rotate forward and the disengagement solenoid turns ON The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor stops rotating when t
89. motor starts to rotate in reverse C When the trailing edge of the original has passed the scanning section the SCN STR turns OFF and at the same time both the read and large original exit motors start to accelerate Then the disengaEgement solenoid turns OFF With a next original feeding of the original begins when the trailing edge of the original has passed the 4th roller e STUDIO550 650 810 RADF 16 30 JUNE 2002 TOSHIBA TEC The large original exit motor starts to slow down when the trailing edge of the original has proceeded specified distance after passing the 4th roller At the same time the read motor stops rotating unless there is a next original The large original exit motor stops rotating when the trailing edge of the original has proceeded a specified distance after being detected by the large original exit sensor Then the original is discharged If this is the last original the operation ends when the large original exit solenoid turns OFF JUNE 2002 TOSHIBA TEC 16 31 e STUDIO550 650 810 RADF 16 6 Jams 16 6 1 Jams at feeding section 1 Original jammed not reaching the original length sensor Jam detection This jam is detected during the time after the feed motor begins to rotate forward to start separation until an original reaches the original length sensor Jam timer setting The setting value for the jam timer is three times as much time as it takes to transport an original
90. of paper in the cassette by using an actuator When there is no paper in the cassette the actuator blocks the light path of the sensor and the sensor determines that there is no paper 8 Feed sensor Transport sensor Feed sensor detects if the leading edge or trailing edge of paper passed the feed roller Transport sensor detects if the leading edge or trailing edge of paper passed the transport roller They also detects jams like misfeeding 9 Registration sensor This sensor detects that the leading edge of paper has reached the registration roller and the trailing edge of paper has passed the registration roller e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 2 JUNE 2002 TOSHIBA TEC 10 Tray up sensor This sensor detects the tray position when the trays of the cassette and tandem LCF go up 11 Bottom sensor This sensor detects the tray bottom position of the cassette and tandem LCF JUNE 2002 TOSHIBA TEC 9 3 e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 3 Operation 9 3 1 Operation of bypass pickup roller Bypass pickup solenoid Pickup arm EN 24 7 Bypass pickup roller Bypass feed roller When the bypass pickup solenoid is turned ON the plunger is pulled and the lever is revolved and brought down The pickup arm which is linked with the lever is also brought with the lever by its own weight When the bypass pickup solenoid is turned OFF the pickup arm is brought up by the spring force The
91. off the carriage home position sensor JUNE 2002 TOSHIBA TEC 6 Scanner motor Carriage home position sensor 19 e STUDIO550 650 810 SCANNING SECTION 7 IMAGE PROCESSING 7 1 General Description 7 2 Image Processing Circuit 7 2 1 General description 7 2 2 Configuration 7 3 SLG Board PWA F SLG 340 7 3 1 Features 7 3 2 Functions of image processing circuit 7 4 PLG Board PWA F PLG 340 7 4 1 Features 7 4 2 Functions of image processing circuit 7 5 Scanning Section 7 6 Writing Section 7 IMAGE PROCESSING 7 1 General Description The following diagram shows the process from scanning of the original to data writing on the photoconduc tive drum surface of the digital copier ASIC stands for Application Specific IC meaning an IC designed for a particular use Scanning section Image processing section Writing section Original ERNE NXE NEN Original glass 2 12 N System control section SYS Laser drive board lt mage processing Scanning ge writing control section processing section ee SLG Polygonal motor conductive Machine laser element control section LGC conductive drum High quality image processing image memory editing editing SL
92. sensor Jam timer setting The setting value for the jam timer is three times as much time as mentioned above 4 Original jammed at the small original exit sensor from the small original reverse side to the small original exit side Jam detection This jam is detected during the time after an original reaches the small original exit sensor until it passes through the small original reverse sensor Jam timer setting The setting value for the jam timer is 1 5 times as much time as It takes for an LT which is the longest original of all kinds of small sized paper when discharging small originals to pass through the small original reverse sensor 16 6 5 Jams at small original exit section 1 Original jammed not reaching the small original exit sensor from the intermediate transport section side Jam detection This jam is detected during the time after an original reaches the intermediate transport roller until it reaches the small original exit sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for an original to proceed the distance from the intermediate transport roller to the small original exit sensor plus 60mm 2 Original jammed at the small original exit sensor from the intermediate transport section side Jam detection This jam is detected during the time after the deceleration which is set to finish at the position 20mm short of the small origina
93. sensor The auto toner sensor is composed of the following circuits Drive winding Magnetic head primary side with a high frequency magnetic field which forms a magnetic circuit in the developer material Detection winding Receiving the changes in the magnetic resistance of the developer material via a magnetic circuit secondary side DC conversion circuit Converting the figh frequency output from the detection winding to a DC signal Magnetic resistance Drive winding Developer material DC Auto toner output conversion Main CPU winding circuit LGC ATS Detection Magnetic circuit e STUDIO550 650 810 DEVELOPER UNIT 12 10 JUNE 2002 TOSHIBA TEC When the toner density is low Toner ratio to the carrier in the developer material decreased gt Magnetic resistance decreased gt Detection output increased Auto toner output V increased When the toner density is high Toner ratio to the carrier in the developer material increased gt Magnetic resistance increased Detection output decreased Auto toner output V s decreased JUNE 2002 TOSHIBA TEC 12 11 e STUDIO550 650 810 DEVELOPER UNIT 12 6 Disassembly and Replacement A Toner cartridge drive unit 1 Open the front cover and take off the toner cartridge and front side inner cover 2 Loosen 1 screw and take off the bracket
94. the copying conditions Paper in the cassette has run out during printing READY Ready for scanning Printing is resumed by removing FINISHER FULL The copier is ready for scanning and waiting paper from the finisher for the operator to select the copying conditions The finisher is full of paper READY Ready for scanning Printing is resumed by removing HOLE PUNCH The copier is ready for scanning and waiting punching dust from the dust box DUST FULL for operator to select the copying conditions The punching dust box is full JUNE 2002 TOSHIBA TEC 5 3 e STUDIO550 650 810 CONTROL PANEL Ready for scanning Printing is resumed by removing paper SADDLE STITCH The copier is ready for scanning and waiting from the saddle stitcher unit TRAY FULL for the operator to select the copying conditions The saddle stitcher is full of paper READY Ready for scanning Printing is resumed by changing SET CORRECT The copier is ready for scanning and waiting the setting for cassette selection CASSETTE for the operator to select the copying conditions then pressing the START key Cassette not installed during printing READY ADDING Ready for scanning Printing is resumed automatically TONER The copier is ready for scanning and waiting when the toner supply is completed for the operator to select the copying conditions The receiving tray is full of paper READY CHECK Ready for scanning Printing is res
95. the display panel Misfeed in copier Misfeeding of cassette paper Fig 5 2 2 Press the HELP key and remove the Press HELP Paper fed from the cassette does not reach paper following the messages the feed sensor in a fixed time shown on the display panel Original jam Fig 5 2 2 Open the jam access cover and Original jamming in RADF RADF unit to remove the original Misfeed in finisher Paper jam in the finisher Fig 5 2 2 H Press the HELP key and remove the Press HELP paper following the messages shown on the display panel Misfeed in Paper jam in the inserter Fig 5 2 2 I Press the HELP key and remove the INSERTER paper following the messages shown on the display panel 10 Call for service Motors sensors switches etc do not work Turn OFF the power and solve the properly Fig 5 2 2 J problem then turn ON the power again 11 Time for periodic PM cycle Maintenance and inspection are per maintenance Time for maintenance formed by a qualified service techni Copying is possible cian 12 Check paper LCF Paper misloading in the tandem LCF Set the paper correctly Displayed when a paper is set out of alignment 13 Toner bag full Replace the toner bag with a new The toner bag is full of used toner one and close the front cover The copier stops its operation Fig 5 2 2 K 14 Select the same Displayed when the paper sizes for the tab Select the same size for
96. the high voltage transformer The high voltage transformer outputs the main grid voltage proportionate to the control voltage The surface potential sensor detects the potential on the photoconductive drum and gives it feedback to the main CPU The potential is compared to the control allowable level specified in the BC RAM f the potential is out of the control allowable level the main grid voltage to be changed is calculated from the difference between the targeted value and detection value The output value of the main grid voltage is changed e STUDIO550 650 810 PROCESS RELATED SECTION 10 6 JUNE 2002 TOSHIBA TEC 2 Conrol during warming up When the warming up begins the control is carried out following 1 the previous page and the warming up ends within the control allowable level 3 Control when finishing printing job When the printing job has finished the control is carried out following 1 at the previous page and the printing operation ends within the control allowable level JUNE 2002 TOSHIBA TEC 10 7 e STUDIO550 650 810 PROCESS RELATED SECTION Latch Terminal cover 98 a O au gt Terminal cover Main charger 277 27 7 LEU toner car
97. the photosensitive drum When printing starts the transfer belt is lifted and held in contact against the photoconductive drum 3 Voltage from the high voltage transformer unit is applied to the transfer belt via the power supply roller As the surface of the transfer belt is electrified by a plus voltage by dielectric polarization the paper is held in contact by static electricity and the processes of transfer separation and paper transport can be carried out continuously 5 After printing ends the transfer belt is lowered and separated from the photoconductive drum to stand by again JUNE 2002 TOSHIBA TEC 13 1 e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 3 Functions 1 Transfer belt unit The transfer belt is coated with a high precision flat rubber belt and has electrical resistance The transfer belt unit is divided into a belt support power supply section and a cleaning mechanism The belt support power supply section supports the belt and rotates to supply power and the cleaning mechanism scrapes of toner from the belt surface 2 Transfer belt support power supply mechanism As shown in Figure 1 the transfer belt is supported by 3 rollers transfer belt drive roller follower roller and power supply roller Voltage having a polarity opposite to that of the toner on the photoconductive drum is applied to the power supply roller The current flowing to the transfer belt is controlled to a constant current of
98. the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a specified distance The large original exit solenoid turns OFF when the large original exit motor stops rotating 10 Start of 2nd original back side registering Same operation as 6 11 Start of 2nd original back side feeding Same operation as 7 JUNE 2002 TOSHIBA TEC 16 15 e STUDIO550 650 810 RADF 12 Start of 2nd original back side scanning Scanning begins after receiving the original transport signal from the copier At the same time the Original transport signal turns OFF When the read motor starts to rotate forward the large original exit motor also starts to rotate forward and the disengagement solenoid turns ON The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor stops when the disengagement solenoid has turned ON When the leading edge of the original has been transported to the intermediate transport section and come to a specified distance before th
99. there is a next original with a specified delay after the original length sensor has detected the trailing edge of the original Without a next original the tray lift motor starts to lower the tray to turn the origianl set signal OFF When the lower limit sensor has detected the tray it stops rotating With a next original the separation begins at the same time the scanning begins When the original has been transported a specified distance by the read motor after the read sensor had detected the leading edge of the original the read motor stops rotating and the original stop signal turns ON 5 Start of 1st original scanning The scanning begins after receiving the original transport signal from the copier At the same time the Original stop signal is reset Then the read motor starts to rotate forward and to separate the next original The SCN STR turns ON when the leading edge of the original has reached the scanning section When it has been transported to the intermediate transport section and come to a specified distance before the intermediate transport roller the large original exit motor starts to rotate in reverse Feeding of 2nd original starts when the original has been transported a specified distance by the read motor after the original length sensor had detected the trailing edge of the original e STUDIO550 650 810 RADF 16 8 JUNE 2002 TOSHIBA TEC SCN STR turns OFF when the trailing edge of the origin
100. timing l Clear paper symbol 9 displayed E51 52 53 54 e When sheet of paper is fed B 2 B 3 B 4 Feed sensor not turned ON after feed clutch has been turned ON Clear paper A symbol displayed E13 14 15 16 18 19 Error codes change depending on the cassette used Add toner Toner density lowered l Toner empty detected Auto toner sensor 4 Control circuit Replace toner cartridge symbol displayed Copying cannot be started Solution Open the front cover and replace the toner cartridge Toner supply operation copying can be started Replace toner bag Toner bag becoming full with used toner l Used toner transport auger moving to feed side Toner bag full detection sensor ON i Replace toner bag symbol displayed e Toner bag full detection sensor turned ON during copying Copying stopped after the last sheet copied has been discharged Solution Replace to a new toner bag by a service technician Developer unit not installed properly Developer unit desconnected 2 Developer unit not installed properly displayed Solution Connect the developer unit connector and close the front cover Call for service When the CLEAR and 8 keys are pressed simultaneously when the Call for service symbol is blinking an error code appears on the message display For the contents of the error codes refer to the SERVICE HANDBOOK e STUDIO5
101. transport auger Drum recovery blade Image quality sensor Drum separation finger Sectional view G17 30 G25 Drive system JUNE 2002 TOSHIBA TEC 11 1 e STUDIO550 650 810 DRUM CLEANER UNIT 11 2 Functions 1 Drum cleaning blade It is pushed to the drum with a certain pressure by a weight and scrapes off the residual toner on the drum surface The pressure is released and the blade is separated from the drum by turning the cam manually 2 Drum recovery blade lt catches the toner scraped by the drum cleaning blade 3 Recovered toner transport auger It transports the scraped toner to the recycle unit 4 Drum separation finger It is pushed to the drum by a solenoid only when the leading edge of the paper passes in order to separate the paper which has not been separated by the transfer belt 5 Image quality sensor It assesses the relative reflective rate for the test pattern toner image formed on the drum in order to keep the image density and line width properly 6 Drum thermistor Since the charging amount changes depending on the temperature of the drum surface the drum thermistor detects the temperature of the drum surface and controls to unify the charging amount 7 Drum cleaning brush It eliminates the paper dusts and extraneous substance adhered to the drum surface after separating the paper and also decrease the friction of the drum cleaning blade to lengthen its life span w
102. when the tray unit is removed and is raised as soon as the tray unit is reinstalled it then checks if there is paper in the tray E 3 From the start to the end of copying 1 The drum motor of the copier is turned ON when the START key is pressed The transport motor is turned ON to drive 2 When the copier judges that the tandem LCF is ready for feeding paper it turns ON the tandem LCF feed clutch of the selected tray This clutch drives the pickup roller and feed roller to feed paper from the tray 3 a specified time after the feeding has started the tandem LCF transport clutch is turned ON to drive the transport roller 4 The leading edge of the paper turns the feed sensor ON These are located right next to the exit side of the selected tray The tandem LCF feed clutch is turned OFF and feeding from the tray is completed b The paper is transported to the copier by the tandem LCF transport roller If the trailing edge of the previously sent sheet still remains at the feed sensor when the leading edge of the paper reaches the feed sensor the tandem LCF transport clutch is turned OFF to stop the transport of the paper 6 The trailing edge of the paper turns the feed sensor OFF These are located right next to the exit side of the selected tray The tandem LCF then becomes ready for feeding the next sheet of paper and the procedures 2 to 5 are repeated 7 When the copying operation is completed the drum motor the ta
103. while moving it downward ADF board 1 Remove 4 screws and take off the rear cover 2 Disconnect all 15 connectors from the board 3 Remove 1 screw and 2 lock supports and take off the ADF board 4 Remove 2 screws release the harness from the clamp and take off the braket Note By disconnecting 15 connectors and removing 3 screws mentioned at the above 2 3 and 4 ADF board can be taken off with the bracket D Rollers D 1 Pickup roller Feed roller 1 Open the jam access cover 2 Remove 2 screws and take off the upper guide cover 3 Remove the clips at the pickup unit displace the bushings and take off the pickup unit e STUDIO550 650 810 RADF 16 74 ADF left cover ad T re 27 2002 4 Remove 3 clips and pull out the feed roller shaft pickup roller belt and pickup intermediate shaft Then take off the pickup Pickup belt belt and feed roller D 2 Separation roller 1 Open the jam access cover 1 2 Remove the pickup unit 3 Remove 2 screws and take off the
104. 0 0 ucro _ Xenon lamp IC16 lighting device WDTOUT 0 01 18518 WDTOUT jamaning Q2 RN1401 P23 WDTEN O IC16 IC17 SG Scanner CPU IC9 PWA F SLG 340 Working conditions EXPON 0 0 WDTEN O 5VSW Q2 Xenon lamp State of copier Lamp drive signal _ H H H Scanner CPU L K overdriving JUNE 2002 TOSHIBA 6 9 e STUDIO550 650 810 SCANNING SECTION 6 5 CCD Control 6 5 1 Opto electronic conversion CCD charge coupled device is used to produce electrical signal corresponding to the reflected light amount from the original The CCD is a one chip opto electronic conversion device comprised of several thousand light receiving elements arranged in a line each one of them is a few microns square This model is equipped with a CCD which has 7 500 light receiving elements Each element of the light receiving section consists of the semiconductive layers P and N When the light irradiates the element the light energy produces a charge in the layer P the amount of the charge produced is proportional to the energy and irradiating time The charges produced in the light receiving section are then sent to the transfer section where they are shifted by the transfer clock from left to right as shown in the figure below and are finally output from the CCD At this time to
105. 0 RADF 16 68 JUNE 2002 TOSHIBA TEC 2 RXD SCN STR DF_ACK DF_REQ signals CPU 5V CPU 5V C1 P64 C1 P63 C1 This is an input circuit to communicate with the copier 1 substitutes 5V and 0 substitetes OV The same logic is used in both the connector and CPU output port JUNE 2002 TOSHIBA TEC 16 69 e STUDIO550 650 810 RADF 3 Input circuits for each sensor RADF open close sensor APS operation sensor Original width sensor 1 Original width sensor 2 Original width sensor 3 Registration sensor Empty sensor Upper limit sensor Lower limit sensor Intermediate transport sensor Small original exit sensor Cover open close sensor Tray sensor Tray width sensor 5V CE C 7 1 IE SH ESS Se Ser 25529 gt gt gt gt gt 27 sorte te oe te 5 xx CET emm ih 2 2 2 2 2 2 2 2 e isf vec 3 TP42 60 0 117 4 1R e 9 8 CN11 8 DFOPNS D P30 1 C40 VC 2 TP41 DOM me UE 11 3 APS D PA4 wc TP10 8123 _ RAI7 4 3 5 6 1 fg 71 1 CN10 3 51251 E 3 E PD4 TCLo E t C59 mE 5 5 TPS saD 5 RE sa CNI0 6 51752 6 3 w ING D PDS TCHo C58 2 CNI0 12 is SGND
106. 00 dpi x 600 dpi primary scanning only 4 division smoothing Eliminated image width Leading edge 3 01 0 mm Trailig edge 2 01 0 mm Side edges 2 0 2 0 mm e Paper feeding Automatic feeding Copier cassettes 2 cassettes Paper stack height 55 mm equivalent to 550 sheets 64 to 80 g m 17 to 22 Ib Bond LCF Paper stack height 137 mm equivalent to 2500 sheets 64 to 80 17 to 22 Ib Bond Bypass feeding Paper stack height 11 mm equivalent to 100 sheets 64 to 80 g m 17 to 22 Ib Bond Capacity of originals in the automatic document feeder and A3 A5 R LD ST RH 100 sheets e Automatic duplexer Stackless Switchback type Toner supplying Automatic toner density detection supply Toner cartridge replacing method There is a recycle toner supplying system JUNE 2002 TOSHIBA TEC 13 e STUDIO550 650 810 SPECIFICATIONS e Density control Automatic density mode and manual density mode selectable in 11 steps Approx 200kg 44116 e Power requirements 115V 15A AC 220 240V 10A e Power consumption 2 0 kW or less 115V series 200V series The electric power is supplied to the finisher and external LCF optional through the copier e Total counter Electronic counter Dimensions of the copier See the figure below W698x D778 x H1207 mm 1207 mm e STUDIO
107. 015 1 peau H MO nA Josues NO Josues uone1 s159 440 IYEAJSIDOY Josues H MOO Josues 110 dois t piomdn NO 108095 18MO7 110 A 10suas fn 16 61 e STUDIO550 650 810 RADF JUNE 2002 TOSHIBA TEC 16 11 Circuits 1 Input circuits for read sensor large original exit sensor small original reverse sensor and original length sensor Since the read sensor large original exit sensor small original reverse sensor and original length sensor have almost the same circuitries only the input circuit for the read sensor is described as followed 5V 5 1 1 R79 1 2 RIS 5V 4 11 5 READS TP39 6 A CN11 6 READLED 1 1 R109 657 56 R74 j READS M READS DA SGNDI This circuit consists of the voltage current conversion circuit which adjusts the amount of light of the infrared LED and the voltage comparison circuit which compares the voltage output from a phototransistor P Tr with a reference voltage and converts the output voltage into digital signals The read sensor is a mirror reflection sensor and consists of a pair of emission elements infrared LEDs and light receiving element Both elements have a light axis running in the same direc tion There is a mirror on the extended light axis of these elements When th
108. 06 for LGC board J407 for PLG board J408 for SLG board J409 for Finisier 1pin 2pin Working with the door switch J402 for LGC board J403 for PLG board J404 for SLG board J409 for Finisher 3pin 6pin e STUDIO550 650 810 POWER SUPPLY UNIT JUNE 2002 TOSHIBA TEC 17 4 Fuse When the power supply secondary fuse is blown out confirm that there is no abnormality with each part using the following table 24 LGC F3 4A Semi time lag Drum separation finger solenoid Total counter Key copy counter Stack solenoid Heater fan motor 24VB LGC Main switch Auto toner sensor Drum surface potential sensor Discharge lamp High voltage developer bias Reverse motor Exit motor Transfer belt cam motor Charger wire cleaner drive motor Used toner transport motor Cleaning brush drive motor New toner supply motor Toner recycle hopper motor 24VC LGC Reversed paper transport section driving clutch 1 2 F5 4A Semi time lag 1st 2nd cassette transport clutch Tandem LCF transport clutch 1st 2nd cassette feed clutch Tandem LCF feed clutch Bypass feed clutch Reversed paper transport section driving clutch Intermediate transport clutch Bypass pickup solenoid Tandem LCF pickup solenoid End fence solenoid Duct out fan motor Exit fan motor Reverse section fan motor 1 2 JUNE 2002 TOSHIBA TEC 17 5 e STUDIO550 650 810 POWER SUPPLY UNIT F4 4A Semi time lag Voltage Board Uni Fuse type Registration motor F5 4A Semi ti
109. 0V 2 EEPROM error The EEPROM error occurs when the initialization value cannot be written on the EEPROM while carrying out the EEPROM initialization and all sensor adjustment at the adjustment mode or when data cannot be read out from the EEPROM after turning ON the power Tray lift motor error The tray lift motor error occurs when a feeding jam because of which the upper limit lower limit cannot be detected within a specified time while lifting lowering the tray takes place 3 times continuously JUNE 2002 TOSHIBA TEC 16 37 e STUDIO550 650 810 RADF 16 8 Original Size Detection The original position base code is transmitted to the copier during the time after the feed signal is sent until 1st original passes through the original width sensor The original size is detected whenever feeding an original and transmitted to the copier as a code before scanning starts 16 8 1 Original size detection method 1 Original position base code The tray guide width is measured and stored when the feed signl is received Altering of the tray guide position during the operation is ignored Width direction size 15 The status of the original width sensor 1 3 are stored when the leading edge of an original reaches the position 10mm further from the 1st roller after feeding has started with the original at the pre feeding position Feeding direction size When the leading edge of an original reaches the position 7mm further from
110. 1 Function 2 Construction 3 Operation 6 3 1 Scanner motor 6 3 2 Two phase motor drive circuit fixed current type 4 Control for Exposure Lamp 6 4 1 General description 6 4 2 Exposure lamp 6 4 3 Control circuit for exposure lamp 5 CCD control 6 5 1 Opto electronic conversion 6 5 2 Shading correction 6 6 Automatic Original Size Detection Circuit 6 6 1 Principle of original size detection 6 6 2 Process of original size detection 6 7 Disassembly and Replacement 6 SCANNING SECTION 6 1 Function In the scanning section of this copier the surface of an original is irradiated with a direct light and the reflected light is led through mirrors and lens to the CCD where the optical to electrical conversion is performed converting the optical image data into an electrical signal This analog signal is changed to a digital signal and then undertakes various corrective processes necessary for image formation After that an arithmetic operation is performed on the digital signal which is then sent to the data writing section Exposure lamp Carriage 1 Drive pulley Reflector 52 correction for carriage 1 Original glass Oley CCD board Carriage 2 alls CCD sensor SLG board Rail for carriage 2 JUNE 2002 TOSHIBA TEC 6 1 e STUDIO550 650 810 SCANNING SECTI
111. 1 e STUDIO550 650 810 GENERAL OPERATION 4 2 2 Standby state ready for copying e Keys on control panel enabled When no key is pressed for a certain period of time Set number 1 and reproduction ratio 100 displayed and copier returning to normal standby state 4 2 3 Cassette feed copying with START key ON 1 START key ON e READY display changed to COPYING e Main charger developer bias and discharge lamp turned ON Each fan rotating at a high speed Drum transfer belt fuser unit and developer unit rotating 15 Cassette paper feeding Feed motor and feed clutch turned ON Pickup roller feed roller and transport roller rotating Paper reaching transport roller Cassette transport sensor turned ON Feed clutch turned OFF after a certain period of time Paper reaching registration roller Registration sensor turned ON and aligning performed Feed motor stopping after a certain period of time operation e Exposure lamp turned ON White shading compensation is carried out e Scanning motor turned ON Carriages 1 and 2 start to advance e Copier entering toner supply operation with developer material toner density being lower than pre set value In certain time after carriage operation e Registration motor turned ON Paper is sent to the transfer section e Copies counted b Ina certain time after registration motor is turned ON Transfer charg
112. 2 screws and take off the solenoid Note When installing the solenoid put together both edges of the plate and solenoid While the solenoid is ordinarily screwed up at the A position it can be slided if screwed up at the B position E Reverse motor 1 Remove the reverse section drive unit 2 Disconnect 1 connector remove 6 screws and take off the transport guide Connector 3 Disconnect 1 connector remove 2 screws and Connector take off the reverse motor JUNE 2002 TOSHIBA TEC 15 7 e STUDIO550 650 810 EXIT REVERSE SECTION F O ring When installing the receiving tray add the O rings Bearing service parts to the exit roller in order to improve the paper stacking condition 1 Remove 6 screws and take off the exit side cover 2 Remove 2 E rings and move the 2 bearings toward the inside 3 Mo
113. 440 HLS N9S eu is pes 9015 MO peau H MO ie Josues NO Josues uone1 s169 440 12151094 he Josues ujbuaj H MOO 7 dos Josues dug 110 dois 1 108095 19M0 110 hee JOSUAS Jaddn JUNE 2002 16 58 e STUDIO550 650 810 RADF 0991 9808 7008 7682 72401 9270 16 8 598 6978 0218 69901 0458 6168 9608 7682 5098 5 0002 00011 00001 0006 0008 PIOUSIOS JO 5 Josues IO EUIDIJO S Josues jews H dois ews 71 M9 H MO NO Josues Josuas 110 NO 1 8105 440 5 1 440 H MOO M99 dois 71 MO MO plougjos x NO euDis ues 440 HLS N9S eu is pes 0015 H MO Jojow b Josues NO Josue
114. 50 650 810 GENERAL OPERATION 4 10 JUNE 2002 TOSHIBA TEC 4 4 Flowchart 4 4 1 Power ON to ready Main SW ON DC power supply ON YES Is cover opened NO IH coil ON Start initializing Scanner motor ON Cassette tray up motor ON Is registration YES sensor ON Is exit sensor ON Is __ 1 JUNE 2002 TOSHIBA 4 11 e STUDIO550 650 810 GENERAL OPERATION Polygonal motor rotating Scanning section initialization toner full detection sensor ON YES Drum motor ON used toner full clear operation YES Toner bag replacement for 6 sec NO Is toner empty Is toner full detection sensor ON YES Toner supply Is initialization NO finished YES Have 20sec passed after initialization started NO YES Call for service C26 Is fuser roller temperature high enough to start pre running YES Pre running started Htec m cut down Is heater N Is cut down pogona marar YES YES Call for service Call for service Call for service C41 C44 CA1 Is fuser roller temperature high enough to be ready YES Pre running finished e STUDIO550 650 810 GENERAL OPERATION 4 12 JUNE 2002 TOSHIBA TEC 4 4 2 Automatic feed copying Press START key Developer bias ON Fuser motor ON Main charger ON Developer unit m
115. 50 810 RADF 16 48 JUNE 2002 TOSHIBA TEC 9 Leading edge control during scanning Leading edge control during scanning started NO Original trailing edge Leading edge transported to NO on separation side large original exit side YES Original trailing edge passed 5 Large original exit motor Large original exit solenoid ON forward rotation original length sensor Original trailing edge on large NO original exit side Feed motor reverse rotation Disengagement solenoid ON 22 edge passed the 3rd roller ON completed NO Large original exit motor reverse rotation Large original exit motor stopped Read motor started The 3rd roller reached Scanning position reached YES Scanning start signal set JUNE 2002 TOSHIBA TEC 16 49 e STUDIO550 650 810 RADF Leading transported to large original exit side YES Large original exit motor used NO in RADF transporting operation YES Disengagement solenoid ON YES Large original exit motor started The 4th roller reached gt YES Large original exit sensor ON 5 Large original exit roller reached Leading control during scanning completed e STUDIO550 650 810 RADF 16 50 Large d EN motor stopped Leading edge control during transporting started JUNE 2002 TOSHIBA TEC 10 Trailing
116. 550 650 810 SPECIFICATIONS 1 4 JUNE 2002 TOSHIBA TEC 1 2 Accessories Unpacking setupinstrucon Operator s Manual 1 pc not available for MJD PM sticker 1 pc for MJD Setup report Customer satisfaction card 1 set for NAD and MJD 1 pc for MJD Operator s Manual pocket 1 pc Power cable 1 pc for ASD AUD and MJD Machine version NAD MJD AUD ASD North America Europe Australia Asia JUNE 2002 TOSHIBA TEC 5 e STUDIO550 650 810 SPECIFICATIONS 1 3 Options Hole punch unit MJ 6003N E F S Inserter MJ 7001 cartridge STAPLE 600 STAPLE 700 for saddle stitcher External large capacity feeder MP 4003A L Key copy counter Key copy counter socket MU 8 MU 10 1 4 Supplies OD 6510 Developer material D 6510 e STUDIO550 650 810 SPECIFICATIONS 1 6 JUNE 2002 TOSHIBA TEC 1 5 System List 00t dIN 191 8 OL NW 19005 Aam OVLL VD 0001 10 JOU 00 1 8 2009 810L fIN JUSIUI 4 LLOI TA JUSIUI 4 004 434 laVLS ajdeis 009 71dVLS ajdeis e STUDIO550 650 810 SPECIFICATIONS JUNE 2002 TOSHIBA TEC 2 OUTLINE OF THE MACHINE 2 1 Sectional View 2 2 Electric Parts Layout 2 3 Symbols and Functions of Vario
117. 69 are discharge resistors to capture charge stored in the current regeneration condensers right after either of the RADF open close switch or cover open close switch is opened The circuit consisted of PTH2 and D1 captures the charge stored in C107 right after either the RADF open close switch or the cover open close switch is opened and also controls incoming current for instantaneous opening closing of the cover JUNE 2002 TOSHIBA TEC 16 63 e STUDIO550 650 810 RADF 3 Drive circuit for read motor TP53 TP63 TP64 5 5 1 1 1 RMOT MOI lt B M D put RMOT gt du R99 RESET D l C38 C100 C102 C101 C39 2 2 2 2 PGND PGND 7 PGND R80 2 RMOT CU DD 5 1 2 1 C13 76 gt cal SGND SGND SGND This circuit controls the rotation stoppage and the direction of rotation excitation mode and motor current of the read motor A drive clock signal RMOT and rotation direction signal CWB are input to control the speed and direction of the motor rotation M1 and M2 are the exciting mode setting signals The PWM signal of RMOT CU is separated and smoothed at R80 R76 and C91 and it is input into IC10 7pin Vref to set the motor current value The motor current value can be changed by altering duties of the PWM signal 4 Drive circuit for feed motor i 1 1 SENE 2 E D d owes m ass AD E NT
118. 810 PC BOARDS 18 2 JUNE 2002 TOSHIBA 4899 10 3 PWA F SLG 340 07 KKN 6 90 56 50 50 50 50 58 58 58 56 222 em 191 6191 ul o7 amp 2628 2125 212 719 MONASH NA I I aw TPSLOHA TESLOHA TeSion 2691 8291 V 9 19619 Hii MH 22222 1 6691 2920202020202029 20 GSP AD aD aD AD SS 29 20 20 20 20 20 20 20 kis e i e 000 i e
119. E JUNE 2002 TOSHIBA TEC 16 9 e STUDIO550 650 810 RADF The SCN SCR turns OFF when the leading edge of the original has reached the scanning section When the trailing edge of the original has proceeded a specified distance after passing the 3rd roller the large original exit motor starts to accelerate cu flat S mS 7 After the original trailing edge has passed the 3rd roller When the leading edge of the original has come to a specified distance before the small original exit roller the small original exit motor starts to rotate forward When the intermediate transport sensor detects the trailing edge of 1st original the large original exit motor stops rotating unless the leading edge of 2nd original has come to a given place If it has the large original exit motor slows down to the speed of scanning When the trailing edge of the original has come to a specified distance before the small original exit roller the small original exit motor starts to slow down
120. EC 2 Empty sensor Tray up sensor Transport sensor Connector 1 Disconnect 1 connector and take off the empty tray up sensors Empty sensor Tray up sensor 2 Disconnect 1 connector remove 1 screw and take off the transport sensor Note Make sure to put on the spring properly after replacing the sensors JUNE 2002 TOSHIBA TEC 9 13 e STUDIO550 650 810 PAPER FEEDING SYSTEM A 3 Feed clutch Transport clutch 1 Release the harness from the harness clamp Then remove 1 screw and take off the clutch cover 2 Disconnect 1 connector remove 1 E ring for each clutch and take off the feed and transport Transport clutch clutches Harness purple Notes 1 When installing the clutches pay attention to the color of harness and fit the stoppers on them completely 2 Make sure that the E rings are tightly fit not to be loosen and one end of E ring does not ride too much on the flat part of shaft Harness black Bracket A 4 Pickup solenoid 1 2 3 Remove 2 screws and take off 2 brackets and Remove the feed unit for the tandem LCF Release the feed clutch and transport clutch 2 guides 4 Remove 1 screw and take off the bracket
121. ENERAL OPERATION 4 1 Overview of Operation Automatic feed copying by pressing S TART key Copier operation T Operation during warming up pre running and standby Copying operation Bypass copying Interrupt copying 4 2 Operation 4 2 1 Warming up 1 Initialization 15 Power turned ON IH coil turned ON Set number 1 and WAIT WARMING UP displayed Fan motors turned ON Scanning section initialization Carriage moving to home position and stopping there Carriage moving to peak detection position Exposure lamp turned ON Peak detection White color is detected by the shading correction plate Exposure lamp turned OFF Carriage moving to home position Feed unit initialization Each cassette tray going up Writng section initialization Polygonal motor rotating Beam position controlled Other Main charger cleaner operating Pre running operation Pre running operation is started when the temperature of the fuser roller reaches a certain temperature Pre running is not carried out when the fuser roller has been already hot enough Fuser roller rotating Drum rotating Drum motor used toner transport motor turned ON Image quality control Patch formed on drum and its reflective ratio read out to set an optimal condition 3 When fuser roller temperature becomes sufficient for fusing IH coil turned OFF Set number 1 and READY displayed JUNE 2002 TOSHIBA TEC 4
122. Forward rotation Limit Home position level level Brake Stop position switch input signal Signal otatus H level L level MCLSW 0 Stop position switch Not detected Detected JUNE 2002 TOSHIBA TEC 10 3 e STUDIO550 650 810 PROCESS RELATED SECTION 10 4 High voltage Transformer Output Control Circuit 10 4 1 General description The high voltage transformer output control circuit is a circuit that generates the output control voltage Vc for the main charger Main transfer belt power supply roller Transfer drum cleaning brush Brush and developer bias Developer It changes the output current lineary by changing the Vc 10 4 2 Operation PWA F LGC 340 341 342 PS HVT 340 Adjustment mode D A Main Main CPU gt Transfer conerter Developer e Each adjustment value of the Main Transfer and Developer in the BC RAM is output to the main CPU The Vc data is output to the D A converter from the main CPU e The data is converted into the analog data at D A converter e he Vc is output to the Main Transfer and Developer transformer The Main Transfer and Developer transformer generate an output current or voltage which is proportional to the Vc The adjustment of the Vc changing of the adjusted data is carried out at the adjustment mode The output value of the drum cleaning brush bias is fixed when the high voltage transformer is deli
123. G SECTION 6 10 JUNE 2002 6 6 Automatic Original Size Detection Circuit This circuit detects the size of original standard sizes only using the reflection type photosensors ar ranged on the base frame of the scanner unit 6 6 1 Principle of original size detection The reflection type photosensors are placed on the base frame of the scanner unit as shown in the Fig 6 6 1 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 1 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 size of the original is detected by checking which phototransistors are turned on or are not A4 Series m LT Series Original glass Original glass Original 5 4 APS 5 Original APS 5 APS 2 APS 3 APS 4 Fig 6 6 1 APS 2 5 1 5 3 6 6 2 Process of original size detection 1 When the copier is in the original size detection mode the carriage 1 is set at its home position 2 When the RADF is opened the sensors receive the light reflected from the original and if one of the matrix conditions shown in 4 for original sizes is satisfied the size of the original is instantly detected 3 The output signal from each sensor is input to the CPU on the scanner control PC board to determine the size of the original
124. G board PWA F SLG 340 processing gamma correction gradation processing external output system interface PLG board Smoothing processing external input system interface image area PWA F PLG 340 control laser related control JUNE 2002 TOSHIBA 7 1 e STUDIO550 650 810 IMAGE PROCESSING 7 2 Image Processing Circuit 7 2 1 General description The image of an original placed on the original glass is scanned by the carriage The CCD Charge Coupled Device reads the optical image signals and converts them into the electrical signal The electrical signals then undergo the analog to digital conversion and are changed into digital signal The shading correction correction of variance in CCD elements and the light source is performed on the digital signal then it is output as an image signal from the scanning section The image processing section receives this image signal from the scanning section and applies various types of image processing on it then sends the output result to the writing section Images are processed by the SLG board PWA F SLG 340 and PLG board PWA F PLG 340 1 Image processing circuit on the SLG board One image processing ASIC is mounted on the SLG board realizing the following functions lt Functions gt High quality image processing image memory editing edit processing gamma correction gradation processing and external output system interface 2 Image processing circuit on the PLG
125. ING displayed 2 START key pressed e READY FOR BYPASS FEEDING display changed to COPYING e Main charger developer bias and discharge lamp turned ON Each fan rotating at a high speed e Drum developer unit transfer belt and fuser roller rotating 3 Sheet bypass feeding e Bypass pickup solenoid turned ON and feed motor rotating in reverse Bypass pickup roller lowered e Bypass feed clutch turned ON Bypass feed roller paper feed roller and separation roller rotating e Aligning operation e Paper reaching registration roller e Bypass pickup solenoid feed motor and bypass feed clutch turned OFF in a certain period of time later 4 Same operations as 3 through 6 of cassette feed copying with START key ON carried out 4 2 5 Interrupt copying 1 INTERRUPT key pressed e Interruption lamp turned ON Copying operation temporarily halted and carriages 1 and 2 returning to their home position e JOB INTERRUPTED JOB 1 SAVED displayed Copying mode set to automatic density and 1 to 1 reproduction ratio and copy quantity indicator unchanged 2 Preferred copying modes specified 3 After an interrupt copying is terminated e PRESS INTERRUPT TO RESUME JOB 1 displayed e Interruption lamp turned OFF Copier returning to conditions before interruption when INTERRUPT key is pressed again e READY TO RESUME JOB 1 displayed 4 START key pressed e Back to copying operation before interruption
126. L 26 4 906 2N e a 9201 1149212849 2 x 6201 A08 143V9118S 6 91 lo 19 e 1121 092 2 t e Ls ge 69HA 8191 w 91 e 269H Old g 9291 e a e gt KOLASZIOHAPL 6 2 91 8 2 91 6 2 91 6 91 3 106 2 2 7691 91 91 91 3294906 KONA 118 4 2L 83 2191 809H Steer ae re a _ _559061 _ Taie zi 161 4 4 19HA 9 2 S 3 2291 219HA VLELTA31SL LSTOH 191 9191 R 191 E A e 5 VESLOATSL gt e c t 265 261 s 6 6 z 0501 a 448156154 448156164 mE mE ette NA VA 0221 EE ETOL V011 19 091482H1 V0L1 18 091482H1 on 9 97717 071 Soir 891 691 1107 94 Mae 62 4 05 TAS 6 7 1 59 859 860 e STUDIO550 650 810 BOARDS 18 1 JUNE 2002 TOSHIBA 2 PWA F LGC 340
127. NO Josues uone1 s169 440 IVEAJSIDSY bine Josues 7 dos Josues 110 dois 10104 i 108095 110 A 10suas jui JUNE 2002 TOSHIBA 16 60 e STUDIO550 650 810 RADF d Two sheets of A4 two sided original 6816 Lip 6589 8969 87 6 LySe rere 969 0646 8676 9220 0590 807 8767 7617 9076 9706 169 ctv 7001 249 CCE sw 0002 0009 0009 0007 000 0002 0001 0 PIOUSIOS JO 5 108095 jew IO JEUIDIO S Josues jews H MOO M99 dois JOJOW ews 71 MO H MO NO 10sues 14 ejeipeuueju NO Josues 110 NO louogjos 440 5 1 440 H MOO M99 dois 71 MO H MO plougjos x NO euDis els 440 HLS N9S eu is yes 0
128. ON 6 2 Construction The construction and purpose of the scanning system are described in this section 1 Original glass This is the glass on which originals to be copied are placed The light from the exposure lamp is irradiated to the original through this glass 2 Carriage 1 The carriage 1 consists of the exposure lamp lamp inverter reflector mirror 1 etc It is driven by the scanner motor and scans the original on the glass a Exposure lamp This lamp is the light source to irradiate the original on the glass one 29W Xenon lamp b Lamp inverter This inverter controls lighting of the Xenon lamp c Reflector This is a plate to direct the light from the exposure lamp efficiently to the surface of the original on the glass d Mirror 1 This is a mirror to direct the reflected light from the original to the mirror 2 that is described later Original Original glass Exposure lamp Reflector Mirror 1 e STUDIO550 650 810 SCANNING SECTION 6 2 JUNE 2002 TOSHIBA 3 2 carriage 2 consists of mirror 2 mirror 3 etc and directs the reflected light from the 1 through mirrors 2 and 3 to the lens This carriage 2 is driven by the scanner motor as the carriage 1 at half the scanning speed of carriage 1 the scanning distance is also half of carriage 1 4 Lens unit The light reflected from mirror 3 is
129. RADF Data sent to RADF from copier FA Ses 2 Data sent to copier from RADF SON Scanning start signal DECONT sanusa Detection signal of connection to DF The data communication RxD and TxD between the copier and RADF is adopting a serial communication system which makes it impossible to check with a testing device whether signals are sent received properly e STUDIO550 650 810 RADF 16 6 JUNE 2002 16 5 Operations 16 5 1 A4 single sided feeding Operational condition 4 original Reproduction ratio 10026 1 Original setting The empty sensor turns ON when the original has been set on the original feeding tray 2 Lifting of the lifting tray The tray lift motor rotates to lift the tray after receiving the original feeding signal from the copier With a specified delay after the upper limit sensor has detected a top side of the original the tray lift motor stops rotating 3 Start of separation The feed motor starts to rotate forward When the original length sensor d
130. TEC B 1 _ Misfeed in copier 8V e Paper leading edge jam detected by exit sensor Registration motor turned ON NA Registration Exit sensor not turned ON within 0 975 sec 3 Exit sensor MEM ME Clear paper symbol displayed E01 J Timer 0 0 975sec Copying stopped e Paper trailing edge jam deteced by exit sensor Misfeed copier E01 Registration motor OFF Registration motor ORE Exit sensor not turned OFF within 0 952 sec Eee 4 ON Clear paper symbol 9 displayed E02 d Timer Copying stopped 0 1 e Immediately after power is turned ON Misfeed in copier E02 Any of all sensors at transport path detecting paper ON Clear paper symbol displayed E03 e Front cover opened during copying V Clear paper symbol 9 displayed E41 e Paperleading edge jam detected by registration sensor Registration sensor not turned ON within a certain period of time after paper leading edge has passed transport roller V Clear paper symbol amp y displayed E20 22 25 30 34 3C When a sheet of paper 15 fed at reverse section Registration sensor not turned ON within a certain period of time after reverse motor has been turned ON Clear paper symbol 9 displayed E11 JUNE 2002 TOSHIBA TEC 4 9 e STUDIO550 650 810 GENERAL OPERATION Whenasheet of reversed paper is transported Transport sensor 1 not detecting paper in a certain
131. TOSHIBA SERVICE MANUAL DIGITAL PLAIN PAPER COPIER 570010550 650 810 DP 5510 6510 8110 File No 31100202 2002 06 Copyright 2002 TOSHIBA CORPORATION GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND SERVICE FOR THE COPIER e STUDIO550 650 810 The installation and service should be done by a qualified service technician Transportation Installation When transporting installing the copier move it by the casters while lifting the stoppers The copier is quite heavy and weighs approximately 200 kg 441 Ib therefore pay full attention when handling it Be sure to use a dedicated outlet with AC 115V or 120V 20A 220V 230V 240V 10A or more for its power source The copier must be grounded for safety Never ground it to a gas pipe or a water pipe Select a suitable place for installation Avoid excessive heat high humidity dust vibration and direct sunlight Also provide proper ventilation as the copier emits a slight amount of ozone To insure adequate working space for the copying operation keep a minimum clearance of 80 cm 327 on the left 80 cm 327 on the right and 10 cm 47 in the rear The socket outlet shall be installed near the copier and shall be easily accessible Service of Machines Basically be sure to turn the main switch off and unplug the power cord during service Be sure not to touch high temperature sections such as the exposure lamp the fuser unit the damp
132. USER UNIT 14 14 JUNE 2002 4 gt 4 Remove 2 E rings and take off the web pushing roller Cautions 1 Take up the cleaning web a little 3 5 rotations with hand after replacing the cleaning web and web pushing roller When installing the cleaning web unit to the fuser unit make sure that the web is not slacked off Turn the fuser unit jam access knob 10 15 times to adapt the cleaning web to the fuser roller At this time make sure that there is no defect caused by an installing inadequacy Make sure that the cleaning web is not riveled or slacked off Set up the PM support 65 and clear the cleaning web counter After clearing it the web motor automatically rotates for 65 seconds when turning the power ON Turn the power ON and make sure that READY is displayed Finally confirm the fuser unit is in a proper condition same as the above 6 Do not rotate the web motor for more than 2 min at the output check 03 124 since the cleaning web may be slacked off when rolled up Note Approximate remaining web can be seen JUNE 2002 TOSHIBA TEC 14 through the window at the fuser unit shown by the right figure 15 e STUDIO550 650 810 FUSER UNIT D IH 1 Remove the cleaning web unit 2 Remove 2 screws and take off the fuser cover front 3 Remove 2 screws and take off the bracket
133. VERSING AUTOMATIC DOCUMENT FEEDER RADF 16 1 General Description The Reversing Automatic Document Feeder RADF 1 a device that automatically feeds originals one by one to the ADF original glass and discharges them to the receiving tray after scanning is finished RADF consists of the following sections Original feeding section This section cosisting of the pickup belt feed roller separation roller registration roller etc feeds originals one by one to the ADF original glass Original transporting scanning section This section consisting of the read roller transport roller etc transports an original on the ADF original glass and scans it at the same time Original reverse exit section This section consisting of the exit roller reverse flapper reverse roller etc discharges an original to either the large or small receiving tray after scanning is finished When two sided scanning is carried out the original is reversed by switching the reverse flapper and fed again to the ADF original glass Original length sensor Tray sensor Registration sensor Separation roller Pickup belt Original width sensor Registration roller Feed roller Empty sensor Smal Large original exit flapper LU EC ENT y A A Intermidiate transport rolle QU Large original exit roller Giz ZA S WA gt 4 gt Large original exit senso ard roller 4th roller Intermidiate tr
134. ada 076 915 Jj I eues 5 TI ndo s 0 ISV 5 LLL eem nm E 3 dwy 2 WOH MSIE 5 2 5 System Block Layout f J JUNE 2002 TOSHIBA TEC 2 26 e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 6 Disassembly and Replacement of Covers and PC boards 2 6 1 Covers A Front cover Front side right inner cover 1 Open the front cover 2 Pull out 2 L shaped pins and take off the front cover 3 Remove 2 screws and take off the front side right inner cover B Feed side rear cover Feed side top cover Feed side Feed side Feed side center cover top cover rear cover 1 Remove 1 screw and take off the feed side rear cover 2 Remove 2 screws and take off the feed side E top cover 3 Open the bypass unit tray and remove 2 screws Then remove 6 screws and take off Feed side center cover the feed side center cover
135. age processing b Heaters and lamps DHR DNP HTR R Preventing of the condensation in the 36 11 Scanner damp heater H scanning section for mirrors DHL DNP HTR L Preventing of the condensation in the 36 9 Scanner damp heater L scanning section for lens DHD D HTR Keeping of the drum warm Drum damp heater IHCOIL IH COIL Heating up of the fuser roller IH coil 6 Solenoid SOL2 GATE SOL Switching of the gate at the reverse 15 2 F 2 Gate solenoid section SOL3 SEP FING SOL Driving of the drum separation finger 30 17 2 Drum separation finger solenoid SOL4 END F SOL Moving of the lever to detect the End fence solenoid paper mis stacking at the standby side tray SOL5 LCF PICK SOL Driving of the Tandem LCF pickup Tandem LCF pickup solenoid roller 7 Transformer Function PS HVT Generating of the voltages for the 51 19 4 High voltage transformer followings main charger wire e main charger grid developer bias drum cleaning brush e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 22 JUNE 2002 TOSHIBA TEC 8 Others Symbol Nama ame Romane Lamp inverter Hard disk Galvanometer mirror Switching power supply Center thermostat over heating Side thermostat over heating Dump heater thermostat over heating Expousre lamp thermostat over heating in scanner section THM1 THMS S HTR 26 6 Fuser roller side thermistor front at the drum edges Abnor
136. al has passed the scanning section and before the trailing edge of the original passes the 3rd roller 2nd original reaches the scanning waiting section and stops being transported 6 Start of 2nd original scanning Scanning begins after receiving the original transport signal from the copier At the same time the original stop signal is reset Then the read motor starts to rotate forward and the large original exit motor starts to rotate in reverse The SCN SCR turns ON when the leading edge of the original has reached the scanning section When the trailing edge of 1st original has proceeded a specified distance after passing the 3rd roller the large Original exit motor starts to accelerate BE E When the leading edge of the original has been transported to the intermediate transport section and come to a specified distance before the intermediate transport roller The large original exit motor starts to rotate in reverse c3 yg m E
137. anger of laser leakage during normal operation Note Laser beam is not visible pay the closest attention when handling the laser unit components or performing operations such as adjustment of the laser beam and this kind of operations which are very dangerous must be performed only by specially trained staff The warning label shown below is attached on the front side left inner cover DANGER INVISIBLE LASER RADIATION WHEN OPTICAL UNIT OPEN OR DRUM UNIT gt PS lt REMOVED AND INTERLOCK DEFEATED AVOID DIRECT EXPOSURE TO BEAM VO CHT UNSICHTBARE LASERSTRAHLUNG WENN DIE ABDECKUNG GEOFFNET ODER DIE TROMMEL ENTFERNT UND DIE VERRIEGELUNG UNWIRKSAM GEMACHT WIRD NICHT DIREKT DEM STRAHL AUSSETZEN DANGER RAYON LASER INVISIBLE LORSQUE LE BLOC OPTIQUE EST OUVERT LE TAMBOUR RETIRE ET LE VERROUILLAGE HORS D USAGE EVITER L EXPOSITION DIRECTE AU RAYON PELIGRO RADIACION INVISIBLE DE LASER CUANDO LA UNIDAD OPTICA ESTA ABIERTA O LA UNIDAD DEL CILINDRO ES RETIRADA Y CUANDO EL INTERRUPTOR DE SEGURIDAD ESTA DESACTIVADO EVITE EXPOSICION DIRECTA AL RAYO f amp lE F2 41 FE LY RIVAL Y F ERIES 8 TARU HB 90810 CAUTION e Do not approach tools near the path of the laser beam e Take off your watches rings bracelets etc when handling the unit JUNE 2002 TOSHIBA TEC 8 3 e STUDIO550 650 810 LASER OPTICAL UNIT 2 Polygonal motor unit This unit consists of the polygonal motor
138. ansport sensor OFF YES After counting specified pulse Specified pulse of original trailing edge NO lt 9 g eag small original exit motor stopped passed from intermediate transport roller YES Small original exit motor forward rotation Small original reversal Next original leading edge reached Large original exit Large original exit motor speed sensor ON motor stopped changed to scanning one YES NG Small sensor YES in cM Trailing edge control for small original discharging started YES Trailing edge control Specified pulse passed for small original discharging started YES Small original exit motor decelerated Trailing edge control during transporting completed JUNE 2002 TOSHIBA TEC 16 55 e STUDIO550 650 810 RADF 14 Leading edge trailing edge control for small original discharging Leading edge control for small Trailing edge control for small original discharging started original discharging started Specified pulse of original leading edge NO passed from intermediate transport roller Back side NO Small original exit motor forward rotation Small original exit Ne sensor ON Small original reversal sensor OFF im Specified pulse passed YES Leading edge control for small original discharging completed Small original exit motor decelerated Small original exit sensor OFF
139. ansport sensor Read sensor 2nd roller Small original reverse sensor Small original reverse flapper Reverse flapper Small original exit flapper Read roller Note Large sized original A3 B4 LD LG Small sized original A4 A4 R B5 B5 R A5 R LT LT R ST R JUNE 2002 TOSHIBA TEC 16 1 e STUDIO550 650 810 RADF 16 2 Construction Drive control section Original feeding tray Jam access cover 22 CZ lt RES Feeding transporting section E Large original recieving section Apparatus Electric parts Feeding transporting Jam access cover Empty sensor section Pickup belt Upper limit sensor Feed roller Lower limit sensor Separation roller Cover open close sensor Registration roller Original length sensor Read roller Registration sensor Exit Reverse roller Original width sensor Intermediate transport roller Read sensor Small original reverse roller Intermediate transport sensor e Small original exit roller Large original exit sensor e Small original reverse sensor Small original exit sensor Original feeding tray Original feeding tray Tray sensor Tray width sensor Drive control section Feed motor Tray lift motor Read motor Large original exit motor Disengagement solenoid Large original exit solenoid e Small o
140. ansport unit remove each unit after removing the fuser and transfer belt units 3 Remove 2 shoulder screws fixed at both sides slide rails c o 4 Hold the A shaft B stay section with the left hand and the right slide rail with the right hand JUNE 2002 TOSHIBA TEC 13 7 e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 5 Lift the transfer transport belt unit and take off the catch up section Slack off the right slide rail a little Push the rail to the inside of the unit 6 Change the A or B section to the right hand and hold the C section with the left hand Then lift the transfer transport unit and take it off Notes 1 Since the guide is sometimes transformed when being pressured be careful not to hold the D section when lifting the transfer transport unit 2 Take the following steps when installing the transfer transport unit 1 Pull out only the left slide rail 2 Hang the transfer transport unit on the left slide rail firmly 3 Extend the right slide rail fully esp
141. ation 5 4 1 Dot matrix LCD circuit 5 4 2 LED display circuit 5 5 Disassembly and Replacement 5 CONTROL PANEL 5 1 Control Panel and Display Panel The display unit consists of key switches and touch panel switches to operate the copier and select various modes and LEDs and an LCD to display the state of the copier or the messages When the operator s attention is reguired graphic symbols appear with messages explaining the condition of the copier in the LCD panel JUNE 2002 TOSHIBA TEC HELP C amp NETWORK 4 gt 5 oc B SAVER JOB STATUS Control Panel Exterior View 5 1 e STUDIO550 650 810 CONTROL PANEL 5 2 Items Shown on Display Panel Fig 5 2 1 G J D H F e STUDIO550 650 810 CONTROL PANEL 52 JUNE 2002 TOSHIBA TEC 5 2 1 Display during normal copying WAIT WARMING UP Scanner warming up The set number 1 and the repro Displayed when the power is turned ON un duction ratio 100 are displayed til the copier becomes ready to start scan when the power is turned ON ning 2 READY WARMING for scanning The set number 1 is displayed Press UP The copier is ready for scanning and waiting the digital key to change the number for operator to select the copying conditions The number is reset to 1 by pressing Returns to default setting if no key is the CLEAR key operated wit
142. ation roller When two sheets enter between the rollers at the same time Since the transporting force of the feed roller and the breaking force of the separation roller are greater than the frictional force between two sheets the pa per A is transported to the direction of the arrow mmm and the paper is braked by the separation roller and 15 not transported any further JUNE 2002 TOSHIBA TEC 5 Feed roller A Torque limitter Separation roller Feed roller Separation roller e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 3 4 General operation A From power ON to standby status 1 When the copier is turned ON the tray up motor is activated and 1st cassette tray starts to rise When the tray up sensor is turned ON L the tray up motor is turned OFF and the tray is stopped At this time if the empty sensor is OFF L it is judged that there is no paper in the cassette With the empty sensor being ON H there is paper in the cassette The tray stops at the raised position regardless of availabilty of paper Then the tray up motor starts to rotate in reverse and 2nd cassette starts to be lifted 2nd cassette tray is stopped in the same manner as 1st cassette tray and the empty sensor detects if there is paper in the cassette 2 When the cassette is not completely inserted when the copier is turned ON the tray for that cassette is not raised When the cassette is inserted completely the tray is ra
143. atteries en lithium selon ce manuel Vorsicht Entsorgung des gebrauchten Batterien und RAM ICs inklusive der Lithium Batterie nach diesem Handbuch 1 1 2 1 3 1 4 1 5 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES Specifications Accessories Options Supplies system List 1 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 1 Specifications Copy process Indirect lectrophotographic process dry system IV OG sans Console type e Original table Fixed type left rear corner used as a guide to place originals Acceptable originals Sheets books and 3 dimensional objects The automatic document feeder only accepts paper single sided originals 50 127g m 13 341b Bond double sided originals 50 104g m 13 28lb Bond excluding carbon paper pasted sheet and stapled sheet Maximum size AS LD Copy speed e S TUDIO550 Copies min Paper supply paper se PY Cassata e S TUDIO650 Copies min ie paper ozo Cassete JUNE 2002 11 e STUDIO550 650 810 SPECIFICATIONS 4 4 4 9 e Ce 9 e 9 Co s 3 a e STUDIO810 A4 LT 5 4 5 B4 LG Top side discharging Back side discharging A3 LD Top side discharging Back side discharging hoc
144. board 2 The image processing functions of the PLG board realizes the following functions e Smoothing processing External input system interface Image area control Laser related control 7 4 2 Functions of image processing circuit An image processing ASIC mounted on the PLG board enables the following functions 1 Smoothing processing This function removes jagginess and smoothes character outline of the text images input from the external input system interface and output them 2 External input system interface This function controls the input interface between the PLG board and the SYS board PWA F SYS 340 3 Image area control This function sets the effective image area of four directions for the image to be output 4 Laser related control This function controls the APC Auto Power Control JUNE 2002 TOSHIBA TEC 7 7 e STUDIO550 650 810 IMAGE PROCESSING 7 5 Scanning Section Light reflected from original surface is directed to the CCD which performs the opto electronic conversion and the optical image data are converted into an electrical signal This analog signal undergoes the A D conversion processing and is changed into a digital signal The signal then undertakes various corrective processes necessary for image formation Signal A D Shading amplification conversion correction Next stage 1 Opto electronic conversion The CCD elements convert the optical signal into electr
145. board Drum Drum thermistor Charger wire cleaner Main charger Discharge LED Drum cleaning blade Drum cleaning brush Drum recoverly blade Image quality sensor Drum separation finger Upper developer sleeve Magnetic roller Lower developer sleeve Magnetic roller Doctor blade Scattered toner recovery roller Auto toner sensor Transfer belt driven roller Transfer belt power supply roller Transfer belt Transfer belt drive roller Transfer belt cleaning blade Transfer belt cleaning brush Cleaning web Cleaning web pushing roller Fuser roller Separation finger Fuser exit roller Pressure roller Cleaning roller metal Cleaning roller felt Fuser roller thermistor e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 Thermostat Pressure roller thermistor Exit roller Reverse exit switching gate Reverse path roller 1 Reverse path roller 2 Transfer roller 1 Transfer roller 2 Transfer roller 3 Transfer roller 4 Registration roller Bypass transfer roller Bypass separation roller Bypass feed roller Bypass pickup roller Intermiditate transfer roller 1st cassette transfer roller 151 cassette feed roller 1st cassette separation roller 151 cassette pickup roller 2nd cassette transfer roller 2nd
146. boards Symbol DFLG PWA F ADF Control of the ADF P88 113 ADF PC control board ADF board e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 24 JUNE 2002 TOSHIBA TEC 4 Switches sensors Symbol COPSW COV OPN SW Detecting if the jam access cover is switch DFOPSW DF OPN SW Detecting if RADF is opened closed Micro switch DFOPNS DF OPN SNS Detecting if RADF is opened closed Semiconductive APS AUTO PS SNS Detecting the angle opened and Semiconductive COPS COV OPN SNS Detecting if the jam access cover is Semiconductive Cover open close sensor photosensor P81 129 EMPS EMP SNS Detecting the presence or absence of Semiconductive ULMTS UP LMT SNS Detecting the upper limit of the lifting tray Semiconductive eris fn paneer Par SIZES1 SIZE SNS1 Detecting the original width Semiconductive SIZES2 SIZE SNS2 Detecting the original width Semiconductive SIZES3 SIZE SNS3 Detecting the original width Semiconductive REGS REG SNS Detecting original at the registering Semiconductive TRYS TRY SNS Detecting the original length on the tray Semiconductive ero LLMTS LO LMT SNS Detecting the lower limit of the lifting tray Semiconductive INT F SNS Detecting original on the small original Semiconductive SOES SO EX SNS Detecting original at the small original Semiconductive READS READ SNS Detecting original at the scanning Semiconductive LNGS LENG SNS Detecting the original length Semiconducti
147. by temperature b Laser ON OFF function c Function to generate the primary scanning synchronizing signals 6 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 STUDIO550 650 810 LASER OPTICAL UNIT 8 6 JUNE 2002 TOSHIBA TEC 8 3 Laser Diode The laser used this copier is a A1 GaAs type semiconductive laser It is generated in the single horizontal mode and its wavelength is approx 780nm This semiconductive laser outputs 15mW with standard DC power supply Laser intensity is controlled by using the output from the PIN diode for monitoring light output in the semiconductive laser The relation between the current and optical output of the semiconductive laser is as shown at right Light emission is started when the forward current High temp reaches or becomes greater than the threshold current and outputs the monitor current which is propostioned to the optical output The threshold Optical Output mW current and monitor current differs depending on the semiconductive lasers due to their individual nature Forward current Optical output has to be adjusted to maintain a constant value Current mA Since the optical output of the semiconductive la Threshold current ser is decreased when the temperature of the laser rises APC control needs to be performed to maintain Fig 8 3 1 a constant optical output Power
148. ce from the large original exit roller to the large original exit sensor plus 60mm 16 6 4 Jams at small original reverse section 1 Original jammed not reaching the small original reverse sensor to the small original reverse side Jam detection This jam is detected during the time after an original reaches the intermediate transport roller until it reaches the small original reverse sensor Jam pulse setting The setting value of the jam pulse is equivalent number of pulses it takes for an original to proceed the distance from the intermediate transport roller to the small original reverse sensor plus 60mm 2 Original jammed at the small original reverse sensor to the small original reverse side Jam detection This jam is detected during the time after the deceleration which is set to finish at the position 20mm short of the small original reverse sensor starts until an original passes through the small original reverse sensor Jam timer setting The setting value for the jam timer is the time mentioned above plus necessary time for an original to proceed 60mm e STUDIO550 650 810 RADF 16 34 JUNE 2002 3 Original jammed not reaching the small original reverse sensor from the small original reverse side to the small original ekit side Jam detection This jam is detected during the time after discharging starts at the small original reverse section until an original reaches the small original reverse
149. d paper dust on the pressure roller 7 Exit roller The exit roller of the fuser unit discharges the paper separated from the fuser and pressure rollers with the separation fingers through the fuser unit 8 Fuser unit exit sensor e STUDIO550 650 810 FUSER UNIT 14 2 JUNE 2002 TOSHIBA TEC This sensor is for detecting that the trailing edge of the paper has reached the fuser unit exit sensor and also for detecting of paper jams at the fuser unit exit section 9 Fuser roller center thermistor Fuser roller side thermistor rear This thermistor detects the temperature of the fuser roller to maintain it in a certain range which is higher than the lower limit causing the poor fusing and lower than the upper limit causing the high temperature offset When the temperature of the fuser roller is lower than the preset temperature it turns ON the power supply to the IH coil and when it is higher than the preset temperature it cuts OFF the supply It also detects the slight different of the temperatures at the center and rear end of the fuser roller to control ON OFF of the center and side IH coil to keep the fuser roller at a certain temperature Fuser roller side thermistor front This thermistor cannot be used for the temperature control detects a temperature abnormality at the side area of the fuser roller where paper does not pass through Thermostats center front The center and front thermostats
150. d the leading edge of the original 5 D s py gt EG The small original exit motor stops rotating when the trailing edge the original has been detected by the small original exit sensor then proceeded a specified distance The small original exit solenoid turns OFF and the operation ends when the original has been discharged JUNE 2002 TOSHIBA TEC 16 17 e STUDIO550 650 810 RADF 16 5 3 A4 single sided feeding Operational condition A3 original Reproduction ratio 100 1 Original setting Same operation as 16 5 1 1 2 Lifting of the lifting tray Same operation as 16 5 1 2 3 Start of separating Same operation as 16 5 1 3 4 Start of feeding The feed motor starts to rotate in reverse When the feed motor has completed acceleration the read motor starts to rotate forward Both the feed and read motors start to slow down when the leading edge of the original has come to a specified distance before the read sensor They stop rotating and the original stop signal turns ON when the leading edge of the ori
151. d to have become lower The level of IC5 6pin OUT is normally after the power is turned ON However when the power is turned OFF or the voltage of the 5V power supply is decreased to 4 25V or lower for some reason the level of IC5 6pin becomes L and the CPU is reset 8 EEPROM circuit DO NC 59 TP60 TP57 TP58 T 2 DO D l 2 DI D 5 DI E2R CS gt 8 CS 2 E2R SK D SK 2 2 2 R156 2 51575 51585 This circuit is an EEPROM to store ADF data and its peripheral circuit 163 IC3 is a memory to store the adjustment value for reflection type sensors and data are sent received between IC3 and CPU using a 4 line type serial interface Data saved in the IC3 is not erased even if the power is turned OFF IC3 1pin CS is a chip selection terminal and its level is H when data are being sent received IC3 2pin SK is a serial clock terminal and the serial data are sent in synchronization with the clock input which is input to this terminal IC3 3pin 01 is a input terminal for serial data and IC3 4pin DO is an output terminal for serial data e STUDIO550 650 810 RADF 16 66 JUNE 2002 TOSHIBA TEC 9 Conversion circuit for D A 5 LED C 2 E TP54 55 TP56 03 le R27 d jP FAN lt ke J SSEN DA lt SGD es 2 147 ni READS
152. developer material is absorbed to form the magnetic brush The magnet is fixed so only its ambient sleeve rotates By this rotation the developer material is transported to the developer sleeve from the transport sleeve Then the magnetic brush formed at the developer sleeve moves on the drum surface like a sweeping broom and the development is carried out e Doctor blade This is for controlling the amount of the developer material which is to be transported from the transport sleeve so that the magnetic brush can get in touch with the drum surface properly f Auto toner sensor To output a normal image the proportion toner density ratio of the carrier and toner in the developer material needs to be always constant The auto toner sensor detects the toner ratio in the developer material with applying the magnetic bridge circuit and suppies the toner from the toner cartridge and recycle toner hopper by driving the new toner supply motor and recycle toner hopper motor when the toner becomes to be run short e STUDIO550 650 810 DEVELOPER UNIT 12 2 JUNE 2002 TOSHIBA TEC g Scattered toner recovery roller This is a roller for trapping and recovering the toner scattered from the developer sleeve not to get outside of the developer unit JUNE 2002 TOSHIBA TEC 12 3 e STUDIO550 650 810 DEVELOPER UNIT 12 3 Developer Unit Drive Idle gear Upper developer sleeve gear Mixer gear 1 G24 me gear G17 G45 G24 Drive input gear G45
153. diate transport clutch Bypass feed clutch 1st cassette transport clutch 1st cassette feed clutch 2nd cassetie transport clutch 2nd cassette feed clutch Tandem LCF transport clutch Tandem LCF feed clutch roller 4 PC boards Symbol Fania PWA F SLG Control of the scanning section and 36 1 B 3 Scanning section control PC board SLG board image processing PWA F CCD Preprocessing control of the CCD 32 17 B 3 CCD driving PC board CCD board image data PWA F SYS Control of the whole copier 52 10 4 System PC board SYS board Data processing PWA F LGC Control of the whole copier 52 14 4 Logic PC board LGC board LDR1 PWA F LDR1 Driving of the laser diode 31 10 C Laser driving PC board 1 LDR board 1 LDR2 PWA F LDR2 Driving of the laser diode 31 10 C Laser driving PC board 2 LDR board 2 PWA F SNS Detection of the laser beam position 31 10 C H Sync detection PC board PS IH Control of the fuser unit IH coil 24 16 E IH control board FUSE PWA F FUS Cutting of the electric current to the 21 30 Fuse PC board damp heater JUNE 2002 TOSHIBA TEC 2 21 e STUDIO550 650 810 OUTLINE OF THE MACHINE Funcion Remarks MOT PWA F MOT Driving of the drum motor and 24 21 F 4 Motor driving PC board transfer belt motor MOT2 PWA F MOT2 13 191 4 Bl CN PLG PWA F PLG Control of the printing section and 31 16 C Laser control PC board PLG board im
154. driving force transmitted through the bypass feed clutch is also transmitted to the bypass feed roller through the shaft and then to the bypass pickup roller through the timing belt The roller is rotated by this driving force 9 3 2 Operation of cassette pickup roller When the cassette is inserted the protrusion at the rear side of the cassette pushes the lever a to the direction of A Then the pickup roller and roller holder are lowered by the spring force of B e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 4 JUNE 2002 TOSHIBA TEC 9 3 3 Paper separation This model is equipped with a separation roller which works to prevent multiple paper feeding The sepa ration roller unit consists of the feed roller separa tion roller torque limitter etc as shown at right The feed roller is rotated by the feed clutch in the direction of the arrow 4 53 at the same timing as the pick up roller rotation The figure at lower right shows how duplicate feed ing is prevented Since the friction between two sheets is small the lower sheet is not transported any further while the upper sheet is transported by the feed roller in the direction of the arrow a Example When only one sheet enters between the rollers Since the transporting force of the feed roller is greater than the braking force of the separation roller the separation roller follows the feed roller making the sheet go forward to the registr
155. e front side 3 Open the scanning guide unjoint the inlets at both sides and take off the guide upward while holding both sides 4 Remove 2 screws and take off the large original exit guide JUNE 2002 TOSHIBA TEC 16 83 Intermediate transport sensor Blue Orange Brown ec RD lt cl Ve LIT eo 7 A E g TU 50000000 e STUDIO550 650 810 RADF 5 Remove 1 screw disconnect 1 connector and take off the large original exit sensor with the bracket 6 Remove 1 screw and release the large Original exit sensor from the bracket G 11 Read sensor 1 Remove the ADF left cover 2 Remove 1 screw disconnect 1 connector and take off the read sensor with the bracket 3 Remove 1 screw and release the read sensor from the bracket G 12 Registration sensor Original length sensor 1 Remove the ADF left cover 2 Open the jam access cover remove 5 screws and take off the upper trans
156. e SLG board realizes the following functions e High quality image processing Image memory editing Editing processing e Gamma correction e Gradation processing e External output system interface 7 3 2 Functions of image processing circuit An image processing ASIC mounted on the SLG board realizes the following functions 1 High quality image processing a Range correction This function corrects the density range of the image signals and adjusts it so that it is suited to each original image It is possible to eliminate undesirable background density when an original with a certain level of density on the background for example a newspaper is copied lt Example gt Dynamic range Extended dynamic range 5 gt After range ao A correction 0 5 2 0 0 lt Density gt lt Density gt Low High Low High Histogram e STUDIO550 650 810 IMAGE PROCESSING 7 4 JUNE 2002 TOSHIBA b Filtering This function is enabled by a low pass filter circuit and a high pass filter circuit e Low pass filter circuit This circuit removes image noise and electrical noise decreases moire and realizes high reproducibility of original by applying an averaging operation on the image signal of the targeted pixel and those of the pixels positioning next to it lt Example gt The density of the targeted pixel position is x The density of the pixel pos
157. e at a fixed speed The frequency of the reference clock is 821 2Hz When the cycle of the FG pulse deviation from the reference frequency is within 6 25 this state is specified as lock range normal rotation Also at this time the LED D4 light comes ON 2 DEVON signal LGC DEV MOT input This signal is the motor ON OFF control signal When it becomes L level the motor rotates Signal level for motor circuit DEVCK Reference clock 821 2Hz DEVON Motor OFF Motor ON e STUDIO550 650 810 DEVELOPER UNIT 12 8 JUNE 2002 TOSHIBA TEC 12 5 Auto toner Sensor Circuit 12 5 1 General description 1 Functions of auto toner circuit Detection of the toner density in the developer material density lowered toner supplied Detection of the toner being empty in the toner cartridge 2 Configuration of auto toner circuit Auto toner sensor Detecting the toner density Control section Controlling to keep the developer material toner density constant New toner supply motor Supplying new toner to the developer material Display unit Displaying the toner empty status e Recycle toner hopper motor Supplying the recycle toner to the developer material Operation control section PWA SYS BC RAM Control panel lt 9 gt Recycle toner hopper Toner cartridge Hopper Recycle New Toner D A PWA LGC motor toner toner motor IC18 IC56 Control MB88347 LCA301 voltage
158. e catching N section STS ae DAV 2 SN N IN P 74 C ring rear 4 Remove 2 screws and disconnect 1 connector 5 Remove 1 C ring rear 6 Remove 1 E ring and take off the gear 7 Remove 2 screws and take off the bearing rear Bearing rear 8 Remove 1 C ring front e STUDIO550 650 810 FUSER UNIT 14 20 JUNE 2002 TOSHIBA TEC 9 Take off the fuser roller covering it with paper and such not to make scars on it J Pressure roller 1 Remove the fuser roller and take off pressure roller K Web detection sensor 1 Remove the fuser unit cover front 2 Remove 1 screw and take off the web detection sensor with the bracket JUNE 2002 TOSHIBA TEC 14 21 e STUDIO550 650 810 FUSER UNIT 15 EXIT REVERSE SECTION 15 1 General Description 15 2 Operation 15 3 Disassembly and Replacement 15 EXIT REVERSE SECTION 15 1 General Description This copier conducts a paper reverse operation when printing more than 2 sheet of paper or carrying out a duplex printing 15 reversing device once transports the pa
159. e displayed on the LCD into the RAM d The LCD controller driver reads the display data from the RAM and out puts the data to the LCD driver KEY CPU Key switches and touch panel PWA F DSP 340 PWA F MKEY 340 PWA F SKEY 340 4 Data transmission FRAME LOAD l LOAD ur CP x 320 4 pulses Do D3 X X XIX X X X X X XX OX X X XIX X X JUNE 2002 TOSHIBA TEC 959 e STUDIO550 650 810 CONTROL PANEL 5 4 2 LED display circuit 1 Method of LED display ex Displaying COPY Current LDONO D7 IC8 7932 The transistor is turned ON when the LDON 0 signal becomes L level Also when 8 17 D7 changes to L the current flows from 5VL the transistor to LED4 COP Y to turn ON LED4 COPY Conditions to turn ON the LED a The transistor Q3 connected to the LED anode is ON 6 The output from the cathode side of the LED is L level The LED is turned ON when a and b are satisfied e STUDIO550 650 810 CONTROL PANEL 5 10 JUNE 2002 5 5 Disassembly and Replacement A Control panel unit 1 Open the front cover and take off the front side right inner cover toner cartridge drive unit and toner recycle unit
160. e intermediate transport roller both the large and small original exit motors start to rotate in reverse The small original exit solenoid has been ON from 1st original Both the SCN STR and the disengagement solenoid turn OFF when the trailing edge of the original has passed the scanning section The large original exit motor starts to accelerate when the trailing edge of the original has passed the 3rd roller and proceeded a specified distance E 16 097 13 After the original trailing edge has passed the roller The large original exit motor stops rotating when the trailing edge of the original has been detected by the intermediate transport sensor then proceeded a specified distance The small original exit motor starts to slow down when the trailing edge of the original has come to a specified distance before the small original reverse sensor Then it stops rotating when the trailing edge of the original has been detected by the small original reverse sensor and proceeded a specified distance e STUDIO550 650 810 RADF 16 16 JUNE 2002 The small original exit motor starts to rotate forward Then it starts to slow down with a specified time delay after the small original reverse sensor has detecte
161. e large original exit sensor and proceeded a specified distance The large original exit solenoid turns OFF and the operation ends when the original has been discharged JUNE 2002 TOSHIBA TEC 16 27 e STUDIO550 650 810 RADF 16 5 5 Single sided feeding at mixed original mode Operational condition A4 R and FOLIO originals Reproduction rario 100 1 Original setting Same operation as 16 5 1 1 2 Lift of the lifting tray Same operation as 16 5 1 2 3 Start of separation Same operation as 16 5 1 3 4 Start of feeding The feed motor starts to rotate in reverse After the feed motor has finished accelerating the read motor starts to rotate forward Both the feed and read motors start to slow down when the leading edge of the original has come to a specified distance before the read sensor The original is transported a specified distance by the read motor after the read sensor detects the leading edge of the original Then after the original size is detected and the idle reversing is judged to be necessary both the feed and read motors start to accelerate and the large original exit solenoid turns ON The large original exit motor starts to rotate in reverse when the leading edge of the original has been transported to the large original exit side and passed the 3rd roller When the registration sensor detects the trailing edge of the original the feed motor stops rotating and the tray lift motor start
162. e paper source Displayed when the tab paper mode is valid Select the 2nd cassette property to for Tab sheet and the tab cassette is not selected the tab to release this state 22 Cannot use OHP Displayed when the paper is OHP and display released when duplex printing is carried out either the setting for OHP or for dupulex printing is released 23 Wait Saving form Displayed during inputting the form The display is released when the combination original saving has finished 24 Fuser cleaning web Displayed when the fuser unit cleaning Replace the cleaning web decreased web gets decreased This message is set not to be displayed at shipment but the setting can be changed at the setting mode 08 938 Time for periodic Displayed when the fuser unit cleaning Replace the cleaning web maintenance Fuser web gets run out cleaning web 26 Tab size A4 LT only Displayed when the tab paper mode is Select A4 or LT for tab paper valid and other than A4 LT is selected for the tab paper size Please divide and set Displayed when originals on the RADF are Remove originals from RADF the documents which loading over is loading over Service Displayed when the surface potential The condition is released when the recommended for surface potential control has SPC control error occurs finished normally e STUDIO550 650 810 CONTROL PANEL 5 6 JUNE 2002 TOSHIBA ion
163. e rear and front flame window and take off the carriage 1 upward while tilting it 5 Attach the wire holder jigs to the wire pulleys not to uncoil the wire 6 Release 2 tension springs e STUDIO550 650 810 SCANNING SECTION 6 Carriage 1 Tension spring JUNE 2002 TOSHIBA TEC 7 Remove the wires and take off the carriage 2 upward while tilting it Scanner motor 1 Remove the feed side cover and disconnect the connector of scanner motor 2 Release 1 spring remove 2 screws and take off the scanner motor with bracket Note Take the following steps when installing the scanner motor 1 Temporarily tack the bracket to the frame 2 Put the spring on the motor and fix it with the screws at a balanced position J Carriage home position sensor 1 Disconnect 1 connector release latches and take
164. ecially its leading edge 4 Hang the transfer transport unit on the right slide rail firmly 5 Fix the transfer transport unit with 2 shoulder screws 6 Follow the reverse procedure of disassembling afterwards e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 8 JUNE 2002 TOSHIBA TEC Transport detection sensor 1 Remove the transfer belt and fuser unit 2 Disconnect 1 connector remove 1 screw and take off each sensor E31 C gt lt ym Transport clutch H 1 Transport clutch 1 2 1 Disconnect 1 connector remove 1 E ring and take off each transport clutch Notes 1 When installing the clutches pay attention to the color of harness 2 Make sure that the E rings are tightly fit not to be loosen and one
165. ection of the white arrow 2 Lift the paper guide a little and insert it in the groove of the paper size marking Then tighten up the screw after confirming the screw hole position G 4 Standby side rear guide 1 Remove 1 screw fixing the standby side rear guide and move the guide toward the direction of the white arrow 2 Lift the paper guide a little and insert it in the groove of the paper size marking Then tighten up the screw after confirming the screw hole position JUNE 2002 TOSHIBA TEC 9 23 e STUDIO550 650 810 PAPER FEEDING SYSTEM G 5 Standby side paper mis stacking detection sensor 1 Remove 2 screws and release the sensor bracket 2 Disconnect 1 connector 3 Release the latches and take off the sensor G 6 End fence home position sensor Standby side empty sensor 1 Disconnect 1 connector and release the harness from the clamp 2 Remove 1 screw fixing the standby side rear guide Then move the guide toward the direction of the white arrow and take it off 3
166. ed ON and either of the error code C41 to C45 is still displayed even thougth the thermistor thermostat and IH coil have been repaired and the power is turned ON check the code 400 in the mode 08 to set the thermistor heater status counter to 0 Reference The fuser roller thermistor error status counter does never have values other than 0 19 entered Ifthe fuser lamp does not turn ON and the Call for service C41 is displayed immediately after the power is turned ON check the fuser roller thermistor error status counter If it is 2 or over be sure to check the thermistor thermostat and IH coil Reset the counter to 07 code 400 in the 08 mode after repairing them then turn ON the power If the fuser roller thermistor error status counter is 20 or over 21 there is a possibility that data in or BCRAM itself may have been ruined due to causes such as leakage from the chargers Check the bias high voltage transformers and charge wires to see if any of them is defective and also look through all the data in the JUNE 2002 TOSHIBA TEC 14 9 e STUDIO550 650 810 FUSER UNIT 14 4 6 Detection of open circuited thermistors A thermistor is a device which resistance decreases when it detects a high temperature If the fuser roller thermistor is open circuited the control circuit finds that the fuser roller temperature is extremely low and keeps turning ON the IH
167. enoid has been ON from 1st original The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor starts to rotate in reverse when the leading edge of the original has been transported to the large original exit side and come to the 3rd roller When the registration sensor has detected the trailing edge of the original the feed motor stops rotating and the tray lift motor starts to rotate to lift the tray The tray lift motor stops rotating when a specified number of counts is counter after the upper limit sensor has detected the top side of the original The empty sensor detects whether or not there is a next original when a specified time passes after the registration sensor has detected the trailing edge of the original If not the tray lift motor starts to rotate to lower the tray and the original set signal is reset The tray lift motor stops rotating when the lower limit sensor has detected the tray When the trailing edge of the original has passed the scanning section the SCN STR turns OFF and both the read and large original exit motors start to accelerate The large original exit motor slows down when the trailing edge of the original has passed the 4th roller and proceeded a specified distance After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when t
168. ensor Feed cover sensor 1st cassette transport sensor 1st cassette tray up sensor 1st cassette feed sensor 1st cassette empty sensor presence or absence 1st cassette bottom sensor detection 1st cassette detection sensor absence 2nd cassette transport sensor 2nd cassette tray up sensor 2nd cassette feed sensor 2nd cassette empty sensor presence or absence 2nd cassette bottom sensor detection 2nd cassette detection sensor or absence Tandem LCF transport sensor feeder section Tandem LCF tray up sensor Tandem LCF feed sensor feeder section Tandem LCF empty sensor absence at tandem LCF Tandem LCF detection sensor presence or absence Tandem LCF bottom sensor S44 END F STP SNR End fence stop position detection 8 14 F 3 IM APP IT JUNE 2002 TOSHIBA TEC 2 19 e STUDIO550 650 810 OUTLINE OF THE MACHINE END F HP SNR End fence home position detection m Standby side paper mis stacking sensor at the standby side Detection of the fuser unit presence Bypass feed unit cover sensor feed unit cover SFB SIZE SNR Paper size detection at the bypass feed width detection TEMP HUMI SNR Detection of the temperature and Temperature humidity sensor e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 20 JUNE 2002 TOSHIBA TEC 3 Electromagnetic spring clutches Name PI eq Reversed paper transport driving clutch transport section Eeoa ES Reversed paper transport clutch 1 Reversed paper transport clutch 2 Interme
169. ensor is turned ON regardless of the state of the APS sensor output signals JUNE 2002 TOSHIBA TEC 6 13 e STUDIO550 650 810 SCANNING SECTION About reflection type photosensor The reflection type photosensor is comprised of an infrared light emitting diode and a phototransistor It uses the pulse modulation to detect an original Original Ln 8usec 130usec Phototransistor 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 STUDIO550 650 810 SCANNING SECTION 6 14 JUNE 2002 TOSHIBA TEC 6 7 Disassembly and Replacement A Original glass 1 Take off the right top cover 2 Remove 2 screws and take off the glass retainer 3 Lift the feed side of the original glass and take it off toward the feed side Lens cover 1 Remove the original glass 2 Remove 9 screws and take off the lens cover Disconnect 1 connector of APS sensor at this time Automatic original detection sensor APS sensor C 1 A4 series 1 Remove the original glass 2 Take off 4 APS sensors each with disconnecting 1 connector and removing 1 screw 3 Remove the lens cover 4 Remove 2 screws and take off the APS sensors with brackets 5 Remove 1 screw and release the APS sensors from
170. er ON 9 Carriage scanning termination e Scanning motor turned OFF e Exposure lamp turned OFF e Registration motor turned OFF after paper trailing edge has passed registration sensor e STUDIO550 650 810 GENERAL OPERATION 4 2 JUNE 2002 TOSHIBA TEC 7 Paper discharging e Exit sensor detecting passing of paper trailing edge e Main charger developer bias and discharge lamp turned OFF e Each operation of drum transfer belt fuser unit and developer unit stopping and each fan returning to standby mode rotation e READY displayed and copier entering standby mode JUNE 2002 TOSHIBA TEC 4 3 e STUDIO550 650 810 GENERAL OPERATION Timing chart for copying 4 sized sheet fed from 151 cassette oror 092 JH gg 0 26 092 _ _ 082 0221 54 5 0681 0921 0621 068 _ _______ __ _ _ _ _ __ 058 092 o 058 022 086 0 G961 959 10808 1X3 abueyosiq seiq Jedojo eq 2461 JOJOW Josues uomneJisiboH JOSUSS 911955622 151 eijesseo 15 2518184 due eynsodx3 JOJOW JSUUE9S JUNE 2002 TOSHIBA TEC 4 4 e STUDIO550 650 810 GENERAL OPERATION 4 2 4 Bypass copying 1 Paper inserted into bypass feed tray e SFB feed sensor turned ON READY FOR BYPASS FEED
171. er scrapes off the toner on the brush Also too pervent the cleaning blade from scratching the surface of the drum to make a circumferential streak the varistor is attached between the brush and earth 2 Cleaning blade scrapes off the residual toner on the drum 3 recovery blade picks up the scraped toner e STUDIO550 650 810 COPY PROCESS Fuser roller US IH coil Pressure Fuser roller Pressure roller Cleaning blade Flicker e Drum rotation Cleaning brush Recovery blade JUNE 2002 TOSHIBA 9 Discharging Discharging is a process of eliminating the charge remaining on the photoconductive drum before the next charging process begins If discharging does not occur the following phenomenon will occur The charge remains on the photoconductive drum Y Uneven charge is applied to the drum during the next copy Y The next copy has a double image Preceding image appears Solution Expose the entire surface of the photoconductive drum to the light by the discharge LED array Y The photoconductive drum becomes electrically conductive Y All the charges remaining on the photoconductive drum are conducted to the ground Y The preparation for the next copy is completed JUNE 2002 TOSHIBA TEC 3 Dischage LED array e STUDIO550 650 810 COPY PROCESS 3 3 Comparison of Copy Process
172. ere is no original between the elements and the mirror infrared light emitted from LED is reflected by PTr in high reflectance If there is an original light emission to the mirror and reflected light from the mirror are blocked by the original and the reflected light entering P Tr becomes extremely small When a large amount of light is entering PTr this means there is no original the optical current flowing in the PTr is increased and the voltage of IC6 8pin becomes higher due to a drop in voltage caused by H109 IC6 is a comparator which compares the reference voltage input to 9pin non reverse input terminal with the signal voltage of 8pin reverse input terminal If the voltage of 8pin is higher the output level IC6 14pin is L On the contrary when the amount of the incoming light is small this means there is an original the voltage of 14pin is low and the voltage of IC6 14pin becomes H R56 C56 and C57 are noise filters This circuit has an automatic sensitivity adjustment function to control the unevenness of the sensor sensitivity Uneven sensor sensitivity is corrected by controlling the machine to have a constant P Tr voltage when there is no original The intensity of the infrared light emitted from the LEDs is changed to adjust the P Tr voltage When the sensor sensitivity adjustment mode is selected the P Tr output voltage analog value is measured by the A D input terminals of CPU The output voltage of the D A converter is
173. es and take off the bypass tray upper cover e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 18 JUNE 2002 TOSHIBA TEC 13 Remove 1 screw and take off the plate spring 14 Remove 1 screw as shown with the white arrow from the back side and release the bracket Bracket Earth plate spring 15 Disconnect 1 connector remove 1 screw and Paper size detection sensor board take off the paper size detection sensor board Connector Note When installing the bracket install it so that the Pointer pointer of the bracket comes to the position where it has been before being removed Notes Pay attention to the following things when setting up the bypass feed roller and pickup roller 1 Put the clip in the groove of the shaft Feed roller Feeding completely direction 2 Make sure there is no adhesion of oil and such the timing belt pulley roller 3 careful not to install the bypass pickup Pickup roller roller and feed roller in a wrong direction Separation roller 4 Install the feed roller for the one way clutch to come to the rear side JUNE 2002 TOSHIBA TEC 9 19 e STUDIO550 650 810 PAPER FEEDING SYSTEM Tray drive unit 1 Remove the rear cover and take off the power s
174. etects the leading edge of the original the tray lift motor starts to rotate to lower the tray to a specified level The feed motor stops rotating when the original has been transported a specified distance after the registration sensor had detected the leading edge of the original From 2nd original feeding starts after the admission signal to start feeding is received JUNE 2002 TOSHIBA TEC 16 7 e STUDIO550 650 810 RADF 4 Start of feeding The feed motor starts to rotate in reverse After the feed motor has finished accelerating the read motor Starts to rotate forward With 1st original both the feed and read motors start to slow down when the leading edge of the original has come to a specified distance before the read sensor From 2nd original the feed motor starts to slow down when the leading edge of the original has come to a specified distance before the 1st roller The feed motor stops rotating when the original length sensor has detected the trailing edge of the original At the same time the tray lift motor starts to rotate to lift the tray When the tray has come to a specified level after the upper limit sensor had detected the top side of the original it stops rotating The empty sensor detects whether or not
175. f the solenoid Notes 1 When installing the solenoid install it for the edge of the solenoid to get in phase with the edges of the plate 2 When installing the solenoid fix it at the position where the bosses of two gears are put each other 3 Put on the spring in the place shown by the figure JUNE 2002 TOSHIBA TEC 917 e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 Remove 4 screws and take off the guide 10 Remove 1 clip displace the shaft and take off the separation roller 11 Remove 2 screws for each bracket and release 2 fixing brackets Then take off the bypass tray TH D bracket 12 Remove 3 screws release 4 latch
176. f tone White backgrou Magnetic roller Solid d Image not developed Bias GEER potential Image is developed b toner NNNN JUNE 2002 TOSHIBA TEC Developer material The developer material is a mikture of toner and carrier The toner is charged to negative polarity and the carrier to positive polarity due to the friction with each other caused by mixing Toner Mainly consists of resin and carbon Carrier Consists of ferrite and resin coating on its surface to provide consistent frictional elec trification Note If the developer material is used for a long time be yond its normal life span the toner is caked onto the carrier Y The carriers charging performance is lowered Symptom 1 Image density is decreased 2 Toner scattering occurs 3 Background fogging occurs Solution Replace new developer material Magnetic roller Magnetic brush development The south and north poles are arranged inside the magnetic rollers as shown in the right figure The developer material forms a brush like fluff which con tacts the photoconductive drum surface Y This is caused by the lines of magnetic force be tween the south and north poles JUNE 2002 TOSHIBA TEC 3 Carbon EK 5 10 Ferrite NG 5 20um Resin 90 95 Toner 30 100 Carrier Carrier No frictional electrification on the area where the toner is caked on Lines of magnetic force Phot
177. fter transporting the specified pulse large original exit motor stopped YES YES Large original exit roller pass margin passed NO Read motor stopped Back side aligned Specified pulse passed Large original exit motor stopped Io Large original exit The 1st roller reached motor stopped Discharged on large Original exit side Large original exit solenoid OFF Pre feeding control Large original exit NO from the 1st roller started motor stopped Trailing edge control for large original discharging completed JUNE 2002 TOSHIBA TEC 16 53 e STUDIO550 650 810 RADF 12 Leading edge control during transporting Leading edge control during transporting started NO Specified pulse of original leading edge passed from the 3rd roller YES Large original exit motor reverse rotation NO Back side Small original exit solenoid ON Small original exit motor reverse rotation Intermediate transport Ne sensor ON YES e STUDIO550 650 810 RADF 16 54 Intermediate transport mE roller reached Back side Small original exit motor c reversal sensor ON Leading edge control during transporting completed JUNE 2002 TOSHIBA TEC 13 Trailing control during transporting Trailing edge control during 59 transporting started Small original reversal M sensor OFF Intermediate tr
178. ge on the drum formed by the negative potential is invisible it is called an electrostatic la tent image 2 Charging Charging is a process of uniformly applying a charge uniformly to the photoconductive drum surface The charger wire produces a negative corona dis charge which is controlled by the grid so that the drum surface is uniformly charged with negative po tential The surface potential on the drum is determined by the grid potential and controlled to a certain value by the grid control circuit e STUDIO550 650 810 COPY PROCESS 3 Photoconductive layer Aluminum conductive base Structure of the photoconductive drum OPC Time t 0 gt iss 3 8 _ 500 Black area of original 5 D White area of original process process 1000 Electric potential on the photoconductive drum Main charger Grid control circuit Discharge transformer 2 JUNE 2002 TOSHIBA TEC 3 Scanning Scanning is a process of exposing the original to the light and converting the reflection into electrical signals The light reflected from the original is imported to the charge coupled device CCD and this optical image information is converted into electrical sig nals image signals which are then sent to the image processing section 4 Writing Writing is a process of converting the image signals sent from the image processing section into optical signals and exposing the drum surface
179. ginal has been detected by the read sensor then proceeded a specified distance e STUDIO550 650 810 RADF 16 18 JUNE 2002 TOSHIBA TEC 5 Start of 1st original scanning Scanning begins after receiving the original transport signal from the copier At the same time the original stop signal is reset When the read motor starts to rotate forward the feed motor also starts to rotate in reverse and the large original exit solenoid turns ON The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor starts to rotate in reverse when the leading edge of the original has been transported to the large original exit side and come to the 3rd roller When the registration sensor has detected the trailing edge of the original the feed motor stops rotating and the tray lift motor starts to rotate to lift the tray The tray lift motor stops rotating when a specified number of counts is counted after the upper limit sensor has detected the top side of the original The empty sensor detects whether or not there is a next original when a specified time passes after the registration sensor has detected the trailing edge of the original With a next original separating of the next original begins When the trailing edge
180. ginal has been transported to the large original exit side and reached to the 3rd roller the large original exit motor starts to rotate in reverse The SCN STR turns OFF after the trailing edge of the original has passed the scanning section and at the same time both the read and large original exit motors start to accelerate After the trailing edge of the original has passed the 4th roller and proceeded a specified distance the large original exit motor slows down After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a speci fied distance Then the original is nipped by the large original exit roller e STUDIO550 650 810 RADF 16 12 JUNE 2002 TOSHIBA TEC The large original exit solenoid turns OFF when the large original exit motor stops rotating 6 Start of 1st original back side registering The large original exit motor starts to rotate forward After the large original exit sensor has detected the
181. ging of 1st original Both the large original exit and read motors start to rotate foward When the leading edge of the original has reached the read sensor then been transported a specified distance by the read motor the disengagement solenoid turns ON The large original exit motor stops when the disengagement sole noid has turned ON When the leading edge of the original has been transported to the large original exit and reached the 3rd roller and the large original exit motor starts to rotate in reverse Feeding of 2nd original begins when the trailing edge of the original has passed the 4th roller Same operation as 16 5 1 4 When the trailing edge of the original has passed the 4th roller and proceeded a specified distance the large original exit motor starts to slow down When the trailing edge of the original has been detected by the large original exit sensor and proceeded a specified distance it stops rotating Then the original is discharged Both the read and feed motors stop rotating when 2nd original has reached the scanning waiting position JUNE 2002 TOSHIBA TEC 16 25 e STUDIO550 650 810 RADF 10 Start of 2nd original top side scanning Scanning begins after receiving the original transport signal from the copier At the same time the Original stop signal is reset When the read motor starts to rotate forward the feed motor also starts to rotate in reverse The large original exit sol
182. he Original has proceeded a specified distance Then the original is nipped by the large original exit roller e STUDIO550 650 810 RADF 16 26 JUNE 2002 TOSHIBA TEC 11 Startof 2nd original back side registering Same operation as 16 5 2 6 12 Start of 2nd original back side feeding Same operation as 16 5 2 7 13 Start of 2nd original back side scanning Same operation as 16 5 2 8 14 Idle reversing and discharging of 2nd original Both the large original exit and read motors start to rotate foward When the leading edge of the original has reached the read sensor then been transported a specified distance by the read motor the disengagement solenoid turns ON The large original exit motor stops when the disengagement sole noid has turned ON When the leading edge of the original has been transported to the large original exit side and reached the 3rd roller and the large original exit motor starts to rotate in reverse The large original exit motor starts to slow down when the trailing edge of the original has passed the 4th roller and proceeded a specified distance The read motor stops rotating without a next original The large original exit motor stops rotating when the trailing edge of the original has been detected by th
183. he thermal efficiency is higher than the lamp method because the fuser roller is directly heated IH coil is divided into two parts to decrease the temperature difference between the center and both ends of the fuser roller Current flowing on the surface of the fuser roller Center IH coil High frequency power source Side IH coil Current flowing inside the Magnetic field Eddy current fuser roller Image of current flowing from A to B 24 circuit for high frequency current Current input JUNE 2002 TOSHIBA TEC 14 5 e STUDIO550 650 810 FUSER UNIT 14 4 3 IH control circuit interface The IH control circuit uses a photocoupler as an insulator against the secondary circuit The interface signals are as followed ow SCS HOST to IH Electric power setting J552 1 J552 2 J552 3 J552 4 J552 5 J552 6 J552 7 J552 8 J553 1 J553 2 J553 3 J553 4 9 E HOST to IH Error signal J553 5 IHERR2 e STUDIO550 650 810 FUSER UNIT 14 6 JUNE 2002 TOSHIBA TEC 14 4 4 IH control circuit abnormalities The IH output is stopped when an abnomlity occurs in the IH control circuit 1 When the power voltage of the copier is too high or too low IH output is stopped to protect the IGBT when the input voltage which is higher or lower than specified range is applied to the copier This is an error C47 2 When the AC is not applied to the IH control circuit The error that the AC is not applied to t
184. he IH control circuit properly is C47 The same error occurs when the thermostat is either activated or blown 3 When the temperature of the IGBT is too high Normally the IGBT is forcibly cooled down as it becomes hot while the power is supplied to the IH control circuit The error C48 is occurred when this cooling operation is not sufficient and the IGBT becomes too hot 4 When the temperature detection sensor of the IH control circuit is malfunctioning The error C49 occurs when the temperature detection sensor is malfunctioning or the IH coil is not connected properly 5 When the ON OFF of IH coil becomes out of control When an abnormality occurs at the IH control circuit and the ON OFF of the IH coil becomes out of control CPU decides the error code and counter value of the fuser roller thermistor error status after detecting the abnormal temperature at the thermistor Abnormal temperature Center thermistor 230 C Side thermistor rear 240 C Side thermistor front 270 C JUNE 2002 TOSHIBA TEC 14 7 e STUDIO550 650 810 FUSER UNIT 14 4 5 Temperature detecting section To keep the fuser roller at a certain temperature the center thermistor and side thermistor rear detect the temperature of the fuser roller and control ON OFF of the IH coil Outputs from the thermistors are used to detect abnormalities of the fuser roller temperature 1 Relation between the thermistor output voltage and surface temperature of t
185. he disengagement solenoid has turned ON JUNE 2002 TOSHIBA TEC 16 13 e STUDIO550 650 810 RADF When the leading edge of the original has been transported to the intermediate transport section and come to a specified distance before the intermediate transport roller the large original exit motor starts to rotate in reverse and the small original exit motor also starts to rotate in reverse and the small Original exit solenoid turns ON Feeding of the next original starts when the read motor has counted a specified time since the start of the scanning operation C DG The SCN STH turns OFF when the trailing edge of the original has passed the scanning section At the same time the disengagement solenoid also turns OFF The next original reaches the scanning waiting position and stops before the trailing edge of the original passes the 3rd roller e 5 M LG Sa DS 9 Start of 2nd original back side scanning Scanning begins after receiving the original transport signal from the copier At the same time the original stop signal is reset The read motor starts to rotate forward and the large original exit motor starts to rotate in reverse The SCN STR turns ON when the leading edge of the original has reached the scan
186. he front side gear E ring and bearing and pull out the transport sleeve 3 If necessary replace the oil seal that is pressed in the front side of the frame Procedure for replacing an oil seal Be Page 12 20 e STUDIO550 650 810 DEVELOPER UNIT 12 18 JUNE 2002 TOSHIBA TEC Mixer 1 Remove the auto toner sensor 2 Remove 2 E rings and take off 2 rear side gears 3 If necessary remove 2 bearings and replace 2 oil seals that is pressed in the frame Note When installing the bearing install it after spreading the grease Albania No 2 all round the mixer shaft 4 Remove 2 E rings and 2 screws and take off the front side mixer nozzle 5 Pull out 2 mixers 6 If necessary replace the oil seal that is pressed in the mixer nozzle Procedure for replacing an oil seal Be Page 12 20 L Paddle 1 Remove 1 E ring and take off the rear side gear and parallel pin 2 Remove 1 E ring and pull out the rear side paddle bushing 3 If necessary replace the oil seal that is pressed in the paddle bushing JUNE 2002 TOSHIBA TEC Mixer nozzle 12 19 e STUDIO550 650 810 DEVELOPER UNIT 4 Remove the gear and 1 E ring and take off the front side paddle bushing 5 If necessary replace the oil seal that is pressed in the paddle bushing 6 Pull out the paddle Procedure for replacing an oil seal Be Page 12 20 lt lt Procedure for rep
187. he fuser roller Approx 4 0V when the temperature is 200 C Approx 3 8V when the temperature is 183 C and approx 3 7V when the temperature is 177 C 2 Temperature control for the surface of the fuser roller Temperature Fusing control 200 C and above IH coil turned OFF 183 200 C IH coil turned ON Normal copy speed 177 183 Copying continued but the copy speed lowered e STUDIO810 only Below 177 C Copying interrupted and back to the ready Durin Durin Ready Warming up Ready 200 C During copying copying waiting C 200 Temperature 183 of fuser roller 177 Herter ON ON OFF ON Copy speed A4 LT e STUDIO810 Temperature control for both ends of the fuser roller During the multiple copying the temperature of both ends of the fuser roller where a paper does not pass on generally becomes higher than that of the other areas where a paper does pass on The side thermistor front detects the temperature of the ends in this case it controls the center IH coil and side IH coil to unify the fuser roller temperature Error detection during warming up 1 If the output voltage of either the center thermistor or side thermistor rear does not go over approx 0 5V 40 C even in a certain period of time after the heater has turned ON the Call for service C41 is displayed e STUDIO550 650 810 FUSER UNIT 14 8 JUNE 2002 TOSHIBA TEC 5 Erro
188. heater and their periphery Be sure not to touch high voltage sections such as the chargers high voltage transformer exposure lamp control inverter inverter for the LCD backlight and power supply unit Especially the board of these components should not be touched since the electirc charge may remain in the condensers etc on them even after the power is turned OFF Be sure not to touch rotating operating sections such as gears belts pulleys fan etc Be careful when removing the covers since there might be the parts with very sharp edges underneath When servicing the machines with the main switch turned on be sure not to touch live sections and rotating operating sections Avoid exposure to laser radiation Use suitable measuring instruments and tools Avoid exposure to laser radiation during servicing Avoid direct exposure to the beam Do not insert tools parts etc that are reflective into the path of the laser beam Remove all watches rings bracelets etc that are reflective Main Service Parts for Safety The breaker door switch fuse thermostat thermofuse thermistor etc are particularly important for safety Be sure to handle install them properly If these parts are shorted circuit and or made their functions out they may burn down for instance and may result in fatal accidents Do not allow a short circuit to occur Do not use the parts not recommended by Toshiba TEC Corporation Cautionary Labels Dur
189. hich improves the image reliability 11 3 Drum Temperature Detection Circuit 45V Main CPU 58 Drum temperature detection circuit Thermistor At this detection circuit the voltage gained by the R33 and thermistor is input into the A D converter of IC 58 to detect the drum surface temperature e STUDIO550 650 810 DRUM CLEANER UNIT 11 2 JUNE 2002 TOSHIBA TEC 11 4 Image Quality Control 11 4 1 General description This copier carries out the image quality control with the image quality sensor The image quality control is for changing the image formation condition to minimize the changing of the image density and line width caused by the environment and life The image quality sensor detects the density of the test pattern developed on the drum and the image formation condition is changed depending on the result 11 4 2 Principle of sensor The image quality sensor applies the light to the drum and toner image test pattern developed on the drum and outputs the voltage corresponding to its reflected light amount A relative reflectivity is assessed by the reflected light amount obtained by the image quality sensor Image quality sensor Light source intensity signal Reflected light intensity signal Light emitting element Light sensing element Test pattern toner image a c 4 000006000000 Drum JUNE 2002 TOSHIBA 11 3 e STUDIO550 650 810 DRUM CLEANER UNIT 11 4 3 Outline of co
190. hich has been gener ated through the corone discharge of the main charger by the exhaust fan and letting it through the ozone filter 6 Surface potential sensor The surface potential sensor detects the surface potential of the photoconductive drum and controls it to keep constant e STUDIO550 650 810 PROCESS RELATED SECTION 10 2 JUNE 2002 TOSHIBA TEC 10 3 Charger Wire Cleaner Operational Circuit 1 Role of the charger wire cleaner circuit This circuit is for cleaning the main charger wire It reciprocates the wire cleaner regulary to avoid a poor charging and irregularities of the drum 2 Configuration of the chager wire cleaning circuit Wire cleaner drive motor Driving of the wire cleaner Wire cleaner stop position switch Detection of the wire cleaner reaching the limit rear side Control section Controlling of the cleaner drive unit and cleaning of the wire Front side Rear side Control section PWA F LGC 340 341 342 Wire cleaner Wire cleaner drive motor MCLSW 0 stop position a ian Kanan nahi O T TEE me a 4 S Os umm Em mm get dmi ua Motor CLMTA 0 CLMTB 0 driver Wire cleaner Main charger wire 9 Drive unit control signal Signal Status CLMTA 0 CLMTB O drive motor level L level Reverse rotation Home position limit level H level
191. hin 45 seconds Bypass feed copying is enabled 3 READY Ready for copying The set number 1 is displayed Press The copier is ready for copying and waiting 1 the digital key to change the number the operator to select the copying conditions The number is reset to 1 by pressing Returns to default setting if no key is operated the CLEAR key within 45 seconds Bypass feed copying is enabled 4 COPYING The original is being scanned After scanning is completed the copier Displayed by pressing the START key becomes ready for the next scanning 5 Saving energy The copier is in the energy saver mode Can be cleared by pressing the Press START START key function select key Place next original Ready for the next original Displayed for SADF and manually Press START to Displayed by pressing the Next original placed originals YES key Power is OFF Press the START key or function Nothing is displayed in the display panel select key Timer LED is lit READY PRINTING Ready for scanning Since background printing is in The copier is ready for scanning and waiting progress the scanned image is not for the operator to select the copying conditions output immediately Background printing is in progress READY Ready for scanning Printing is resumed by adding paper ADD PAPER The copier is ready for scanning and waliting to the cassette for the operator to select
192. ical signal amp Chap 6 5 1 2 Signal amplification Amplifies the electrical signals converted in the CCD 3 A D conversion Converts the analog signal into the digital signal 4 Shading correction The shading correction is applied on the signal read by CCD Chap 6 5 2 7 6 Writing Section The image signal processed by the PLG board is processed by the ASIC for writing control and laser drive board The laser is controlled based on the signal writing data on the drum 1 Setting the effective image area Top bottom left and right margins 2 Horizontal synchronization signal H Sync he reference clock signal in the printer section clock generation section synchronized with the H Sync and its signal 3 Laser drive section ON OFF control of the semiconductive laser and APC Auto Power Control control e STUDIO550 650 810 IMAGE PROCESSING 7 8 JUNE 2002 8 8 1 8 2 8 3 8 4 LASER OPTICAL UNIT General Description Structure Laser Diode Disassembly and Replacement 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 which have been sent from the scanner printer controller etc to create a latent image The Image signal are converted into the light emission signal of the laser di
193. ide roller Note When installing the guide roller pay attention to its color upside white downside black Bias plate e STUDIO550 650 810 DEVELOPER UNIT 12 16 JUNE 2002 I Scattered toner recovery roller Developer sleeves magnetic roller 1 Remove 3 screws and take off the front side plate 2 Remove the scattered toner recovery roller 3 Remove 2 screws of the front side developer sleeve holder 4 Remove the bearing and E ring and take off the gear and parallel pin 5 Remove 2 screws of the rear side developer sleeve holder 6 Remove both the upper and lower developer sleeves with the holders 7 Take off 2 pole position fixing bushings and remove 2 E rings 0 i SS M On JUNE 2002 TOSHIBA TEC 12 17 e STUDIO550 650 810 DEVELOPER UNIT 8 Remove 4 E rings and take off 2 gears Developer sleeve holder 9 Take off the developer sleeve holders at both the front and rear sides 10 Remove 2 seals 4 shield bushings and the Seal Shieled bushing Scraper scraper and take off both the upper and lower side developer sleeves 11 If necessary replace the oil seals that are pressed in 2 rear side shield bushings Procedure for replacing an oil seal Be Page 12 20 J Transport sleeve 1 Remove 1 screw and take off the rear side pole position fixing bushing 2 Remove t
194. iling edge of the original the feed motor stops rotating and the tray lift motor starts to rotate to lift the tray The tray lift motor stops rotating when a specified number of counts is counted after the upper limit sensor has detected the top side of the original The empty sensor detects whether or not there 1 a next original when a specified time passes after the registration sensor has detected the trailing edge of the original If not the tray lift motor starts to rotate to lower the tray and the original set signal turns OFF The tray lift motor stops rotating when the lower limit sensor has detected the tray When the trailing edge of the original has passed the scanning section the SCN STR turns OFF and both the read and large original exit motors start to accelerate e STUDIO550 650 810 RADF 16 20 JUNE 2002 TOSHIBA TEC When the trailing edge of the original has passed the 4th roller then proceeded a specified distance the large original exit motor starts to slow down and the read motor stops rotating The large original exit motor stops rotating when the trailing edge of the original has been detected by the large original exit sensor then proceeded a specified distance The large original exit solenoid turns OFF and the operation ends when the original has been discharged
195. increase the transfer speed of the CCD image signals in the even number and odd number elements are separated and output in parallel via two channels Transfer clock Light energy ayer N 9 7500 layerP WIE Details of light receiving element Transfer section Light receiving section Transfer section Shift register Transfer clock Principle of the opto electronic conversion by CCD 6 5 2 Shading correction Signal voltages read by the CCD have the following characteristics 1 Light source has variation in its light distribution 2 Since the light beam reflected from the original is converged using a lens the light path is the shortest at the center of the CCD and the longest at ends This causes difference in the amount of light reaching the CCD i e the light amount is maximum at the CCD center gradually decreases toward ends 3 Each of the 7 500 elements varies in the opto electronic conversion efficiency These variations need to be corrected and this correction is referred to as shading correction Based on the black and white data obtained in advance a normalization process using the following formula is applied to the raw image data to correct lighting variance and element variation of the image data k x W Coefficient Image data before correction Black data stored in black memory White data stored in white memory SANA e STUDIO550 650 810 SCANNIN
196. ing toner in the toner cartridge is decreased B 2 Recycle toner transport motor Hopper motor 1 Disconnect 2 connectors 2 Remove 2 screws and take off the transport motor 3 Remove 2 screws and take off the hopper motor Protrusion Hopper motor JUNE 2002 TOSHIBA TEC 12 13 e STUDIO550 650 810 DEVELOPER UNIT D Developer unit Developer unit 1 Remove the toner cartridge drive unit and toner recycle unit 2 Turn the L shaped shaft upward to release the lock 3 Disconnect 1 connector and pull out the developer unit to the front side E Developer material 1 Remove the developer unit 2 Remove 2 screws and take off the top cover 3 Tilt the developer unit and get out the developer material with turning the rear side gear 4 Putin anew material 5 Turn the rear side gear several times to uniform the material e STUDIO550 650 810 DEVELOPER UNIT 12 14 JUNE 2002 Note When installing the top cover insert the latches completely and be careful not to catch up the urethane seal Also pay attention to the lap of the urethane sheets
197. ing servicing be sure to check the rating plate and the cautionary labels such as Unplug the power cord during service Hot area Laser warning label etc to see if there is any dirt on their surface and whether they are properly stuck to the copier Disposition of Consumable Parts Packing Materials Used batteries and RAM ICs Regarding the recovery and disposal of the copier supplies consumable parts packing materials used batteries and RAM ICs including litium batteries it is recommended to follow the relevant local regulations or rules When parts are disassembled reassembly is basically the reverse of disassembly unless otherwise noted in this manual or other related documents Be careful not to reassemble small parts such as screws washers pins E rings star washers in the wrong places Basically the machine should not be operated with any parts removed or disassembled Precautions Against Static Electricity The PC board must be stored in an anti electrostatic bag and handled carefully using a wrist band because the ICs on it may become damaged due to static electricity Caution Before using the wristband pull out the power cord plug of the copier and make sure that there are no uninsulated charged objects in the vicinity Caution Dispose of used batteries and RAM ICs including lithium batter les according to this manual Attention Se d barrasser de batteries et RAM ICs us s y compris les b
198. ion mode 1 3 SCNRST Reset Sets the excitation mode Note Do not change the setting wihin 5us before and after the rising and falling edge of the pulse of SCNCLK O Internal circuit of the driver is initialized by setting the motor to L level pulse interval 10us or The motor drive circuit is automatically reset when the power is turned ON H Normal operation The motor has been excited SCNEN O L Excitation drive output is forcibly shut OFF the motor has not drive output been excited e STUDIO550 650 810 SCANNING SECTION 6 6 JUNE 2002 TOSHIBA TEC 6 4 Control for Lamp 6 4 1 General description Control circuit of the exposure lamp consists of the following 3 blocks 1 Lighting device for the Xenon lamp Inverter Turns the exposure lamp ON OFF 2 CCD sensor circuit This circuit works to the convert the reflected light amount from the original surface and the shading correction plate to the electrical signals The reflected light amount from the shading correction plate is read to control the exposure amount 3 Image processing circuit The output signals from the CCD are digitized and the image processing such as gamma Correction and shading correction is applied to them Original Shading correction plate Exposure lamp Xenon lamp Lighting device for Kenon lamp Inverter PWA CCD CCD sensor PWA CCD PWA SLG Sca
199. is condition When tray up sensor is turned ON within a certain period of time Tray motor stopping At this time if empty sensor is ON Determined there is a paper if empty sensor is OFF Determined there is no paper l Add paper display blinked e Whenthe remaining sheets of paper are getting short during copying Tray up sensor turned OFF Tray up motor turned ON Tray going up Tray up sensor turned ON Tray motor stopping e When empty sensor is turned OFF despite tray up sensor being ON during copying 2 Determined there is paper 4 Add paper display blinked 2 Copying stopped JUNE 2002 TOSHIBA TEC 4 7 e STUDIO550 650 810 GENERAL OPERATION A 2 Bypass misfeed amp V e When doing a bypass feeding Bypass feed pickup solenoid turned ON 2 Registration sensor turned ON When the registration sensor is not turned ON after a certain period of time E12 2 Bypass misfeeding 2 Clear paper symbol 9 displayed Copying operation disabled Solution Remove paper from the bypass tray and the bypass sensor will be turned OFF A 3 Set key copy counter e When the key copy counter optional is pulled out from the copier which installs it Set key copy counter displayed Copying operation disabled e When the counter is pulled out during copying Copying is stopped when the key copy counter is pulled out e STUDIO550 650 810 GENERAL OPERATION 4 8 JUNE 2002 TOSHIBA
200. ised and checks the availability of the paper 3 When either of the sensors at the transport path is ON meaning there is paper on the transport path when the copier is turned ON it is determined that a paper jam has occurred and no operation is enabled until the paper is removed Standby status 1 After the tray is moved up and availability of paper is checked as described above the copier enters the standby state In the standby mode the tray remains at raised position 2 When a cassette is inserted or removed in the standby state the tray is raised again to check the availability of paper Bypass feeding e The bypass sensor detects the availability of paper e The bypass feed clutch is turned ON and the bypass pickup roller and bypass feed roller rotate e The bypass pickup solenoid is turned ON and the bypass pickup roller is lowered to start feeding The leading edge of the paper turns ON the registration sensor and the paper is aligned with the registration roller e The bypass feed clutch is turned OFF and the bypass pickup roller and the bypass feed roller are stopped and then the bypass pickup roller is raised The registration motor is turned ON and paper is transported to the transfer unit D Cassette feeding e The feed clutch is turned ON and the pickup roller and feed roller rotate to start feeding The leading edge of paper turns ON the transport sensor the feed clutch is turned OFF and the tran
201. it motor stops rotating The large original exit motor starts to rotate in reverse after the original has been transported to the large original exit and the leading edge of the original has reached the 3rd roller CA The large original exit motor starts to slow down when the trailing edge of the original has proceeded a specified distance after passing the 4th roller After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a specified distance The original is nipped by the large original exit roller JUNE 2002 TOSHIBA TEC 16 29 e STUDIO550 650 810 RADF 7 Back side registering to set the top side Same operation as 16 5 2 6 8 Start of top side feeding Same operation as 16 5 2 7 9 Start of scanning Scanning begins after receiving the original transport signal from the copier and at the same time the original stop signal is reset The read motor starts to rotate foward and so does the large original exit motor Then the disengagement solenoid turns ON The large original exit solenoid has been ON since the original was idle reversed The SCN STR turns ON when the leading edge of the original has reached the scanning section When the leading edge of the original is transported to the large original exit and reaches the 3rd roller the large original exit
202. it via a gear having a planetary joint 11 Transfer belt contact release mechanism This mechanism has two functions separating the transfer belt from the photoconductive drum when a jam occurs and bringing the transfer belt in touch with it when copying is started e The rotation of cam by a driving force which has been transmitted by the gear from the cam motor makes the rear side lever in the transfer belt move up and down e The transfer is separated from brought in touch with the photoconductive drum by handling the lever vertically e The cam phases are controlled by two sensors 12 Duplex printing transport section When carrying out a duplex printing reversed paper goes through this section JUNE 2002 TOSHIBA TEC 13 3 e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 4 Disassembly and Replacement A Transfer belt unit 1 Open the front cover turn the handle clockwise and pull out the transfer transport unit 2 Remove 1 screw and take off the hundle 3 Remove 2 screws and take off the cover 4 Disconnect 2 connectors remove 1 clip and take Clip Connector off the front side bearing Then remove 4 screws and take off the transfer belt unit
203. itions at the front and back of the targeted pixel are a and b respectively x is converted to x through low pass filtering When the matrix is 3 x 1 a b x X The above averaging operation is performed for all the pixel positions to accomplish the high reproducibility of the original The following is when low pass filtering is applied on the primary scanning pixel Density Density After low pass filtering 012345 6 7 89 012345 6 7 89 Primary scanning pixel positions Primary scanning pixel positions e High pass filter circuit The change of the density at the character outline becomes smooth when an original such as text with a great difference in density between the pixels placed next to one another is optically scanned and output from the CCD This is caused by the characteristic of the lens and other factors In this copier the process such as the edge enhancement is applied on the targeted pixel and the pixels around it to eliminate this phenomenon and realize high reproducibility of the original Solid black area Low contrast area Original Image signal After correction JUNE 2002 TOSHIBA LD e STUDIO550 650 810 IMAGE PROCESSING 2 Image memory editing This function performs editing such as enlargement reduction mirror imaging etc using the line memory Pixel data for one line in the primary scanning direction are stored in the line memory and the mem
204. jBue H MOO e pee MO NO Josues 440 dois 1010 10SUSS JOMO7 330 0 Josues eddy e STUDIO550 650 810 RADF 16 57 JUNE 2002 b Two sheets of two sided original 0292 0152 Lug 5726 arta 8108 2997 9218 0 18 1984 006 6 gu 0218 987 9608 7682 97 7 8697 N N N 0092 OD e LO CN Y PIOUSIOS JO I 5 108095 IO EUIDIJO S bins Josues jews H MOO M99 dois 1010 ews 71 MO H MO NO 10suas 1 ejyeipeuueju Josuas 110 NO louogjos 440 5 1 440 H MOO M99 dois pIeT 71 MO H MO plougjos 1 NO euDis els
205. l exit sensor starts until an original passes through the small Original exit sensor Jam timer setting The setting value for the jam timer is the time mentioned above plus necessary time for an original to proceed 60mm JUNE 2002 TOSHIBA TEC 16 35 e STUDIO550 650 810 RADF 3 Original jammed not reaching the small original exit sensor from the small original reverse side Jam detection This jam is detected during the time after an original reaches the small original reverse sensor until it reaches the small original exit sensor Jam timer setting The setting value for the jam timer is the time mentioned above plus necessary time for an original to proceed 60mm 4 Original jammed at the small original exit sensor from the small original reverse side Jam detection This jam is detected during the time after the deceleration which is set to finish at the position 20mm short of the small original exit sensor starts until an original passes through the small original exit sensor Jam timer setting The setting value for the jam timer is the time mentioned above plus necessary time for an original to proceed 60mm 16 6 6 Jams at intermediate transport section 1 Original jammed not reaching the intermediate transport sensor Jam detection This jam is detected during the time after an original reaches the 3rd roller until it reaches the intermediate transport sensor Jam pulse setting The setting value f
206. l original exit roller Small original reverse roller X S e w 79 NC roller Large original exit motor eO EN KR rotates countericlockwise gt to discharge and reverse 4 originals Front e STUDIO550 650 810 RADF 16 4 JUNE 2002 5 Tray lift motor rotating forward seen in front Tray lift motor Tray lift motor rotates clockwise to lower the tray Lifting tray 6 Tray lift motor rotating in reverse seen in front Tray lift motor Tray lift motor rotates counterclockwise to lift the tray Lifting tray JUNE 2002 TOSHIBA TEC 16 5 e STUDIO550 650 810 RADF 16 4 Signal Block Diagram Reversing automatic document reader COP SW COPSW fica DFOP SW DFOPSW DFOPN SNS AP SNS APS SIZE1 SNS SIZE2 SNS SIZE3 SNS REGS SNS EMPS SNS ULMTS SNS LLMTS SNS IMT F SNS m SOE SNS COPS SNS TRYS SNS TRVR SNS SSBS SNS READS SNS ESSOL LOE SNS LNGS SNS RXD SGND TXD ACK Commu REQ nication SCN STR circuit DF ACK DF REQ DF CNT Driver Irruptive current DC 24V control circuit wn ites Ascent Communication request signal copier to RADF DFSREQ Communication request signal to copier IDDESACIS Response signal to communication request signal RADF to copier BOIS orb Response signal to communication request signal copier to
207. lacing an oil seal gt gt In the developer unit the oil seals are used at the following 9 places Rear side of the upper and lower developmer sleeves 1pc for each e Front side transport sleeve 1pc Rear and front sides of the mixer 2pcs for each Rear and front sides of the paddle 1pc for each An oil seal is replaced by the following steps 1 Take off the oil seal by hooking out its inside with a fine driver and such 2 Pushin a new oil seal parallel to the frame bushing and so on with paying attention to its direction as shown by the right figure 3 Spread the grease Albania No 2 about 2 rice grain s amount all round the inside diameter Note Wipe off the grease which has run off to the inner side of the oil seal Paddle bushing Inside lt Grease e STUDIO550 650 810 DEVELOPER UNIT 12 20 gt Outside Oil seal JUNE 2002 TOSHIBA TEC Developer unit motor 1 Remove the rear cover 2 Remove the SYS board and hard disk with the bracket 3 Disconnect 1 connector remove 3 screws and take off the developer unit motor with the bracket 4 Remove 2 screws and release the motor from the bracket N Developer unit switch 1 Remove the developer unit main charger
208. lade Recovery blade 1 Remove the recovery blade Notes 1 The recovery blade is attached with double faced tape so remove the tape compeletely before attaching a new blade 2 Attach the recovery blade fitting its bottom edge into the notch of the cleaner frame E Cleaning brush 1 Pull out the rear side holding shaft and take off the cleaning brush F Drum separation finger 1 Remove 2 screws and take off the plate at the rear side Recovery blade e STUDIO550 650 810 DRUM CLEANER UNIT 11 8 JUNE 2002 TOSHIBA TEC 2 Remove 1 E ring and take offthe MC 3 Move the shaft of the separation finger toward the rear side and pull it out 4 Remove the screws and pull out the separation fingers from the shaft G Image quality sensor 1 Remove 2 screws and take off the sensor with the bracket 2 Remove 2 screws and take off the image quality sensor JUNE 2002 TOSHIBA TEC 11 9 Connector e STUDIO550 650 810 CLEANER UNIT H Drum motor 89 1 Remove the rear cover and take off the SYS Drum wheel board and hard disk with the bracket 2 Remove 3 screws and take off the drum
209. led to the CCD placed at the focal point of the lens which is fixed in position 5 CCD board Processes such as the signal amplification signal integration A D conversion and shading correction are applied on the electrical signal which has been converted by the CCD 6 Automatic original detection sensor The size of the original placed on the glass is instantly detected using the automatic original detection sensors APS sensor fixed on the base frame without carriage 1 having to move JUNE 2002 TOSHIBA TEC 6 3 e STUDIO550 650 810 SCANNING SECTION 6 3 Operation 6 3 1 Scanner motor Scanner motor Carriage wire Carriage 1 Pulley for carriage 2 020 iud OO Motor pulley Idler pulley 020 2GT Z24 Carriage 2 Wire pulley 030 831 2GT Z84 a Scanning original on original glass This motor drives the carriages 1 and 2 through the timing belt and carriage wire The scanner motor first drives carriages 1 and 2 to their respective home positions The home positions are detected when carriage 1 passes the home position sensor When the START key is pressed both carriages start to move and scan the original on the glass 6 Scanning original on RADF Carriage 1 stays at the shading position during the shading correction and at the scanning position during the scanning operation e STUDIO550 650 810 SCANNING SECTION 6 4 JUNE 2002 TOSHIBA TEC 6 3
210. mal detection Fuser roller center thermistor at the drum center THM3 THMS S HTR 26 6 Fuser roller side thermistor rear at the drum edges 49 12 26 28 51 7 51 6 51 6 37 11 THM5 THMS L HTR Detection of the surface temperature NF 1 NOIZ FILTER1 Noize cut BRK1 BREAKER1 Safety switch ka O O BRK2 BREAKER2 Safety switch inaa Discharge lamp the drum surface THM4 THMS DRM Detection of the drum surface Drum thermistor B 4 E E E F 5 E F 5 F 5 F 5 F 5 JUNE 2002 TOSHIBA TEC 2 23 e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 4 Symbols and Functions of RADF Various Components 1 Motors Symbo RMOT RMOT Driving of the transport roller Stepping motor CT reine NU _ SMOT Driving of the small original exit roller Stepping motor UDMOT Driving of the tray lift motor Stepping motor M CEN REN NE FMOT FMOT Driving of the feed roller pickup roller Stepping motor ll Edd NE LMOT Driving of the large original exit roller Stepping motor CN and large original reverse roller 2 Solenoids Symbol ESSOL ESSOL Disengagement of the large original DC solenoid LSOL LSOL Switching of the large original exit DC solenoid Large original exit solenoid flapper SSOL 5501 Switching of the small original exit DC solenoid Small original exit solenoid flapper and reverse flapper 3 PC
211. me lag LCF unit IH fan motor Cassette tray up motor 1 2 LCF tray up motor Feed motor bad Drum motor Transfer beli motor 24VD PLG Polygonal motor F7 4A Semi time lag OPT Laser unit fan motor 24VE SLG SLG fan motor Scanner 5 fan motor driver circuit SLG board Lamp inverter 36VC SLG Scanner motor F8 4A Semi time lag Scanner Scanner motor driver circuit SLG board 24VH Finisher F9 8A Semi time lag 24VF RADF F10 5A Semi time lag 24VG LGC Monitering system e STUDIO550 650 810 POWER SUPPLY UNIT 17 6 JUNE 2002 TOSHIBA 17 5 Configuration of Power Supply Unit GN 24VA LGC Breaker Frequency reactor o pil 24VB LGC Main switch o o F9 24VC LGC 1 8 70 Noise ape 36VA LGC O7 O filter 36VB LGC Door switch 28 F9 Switching power 3 3VC SYS 5 1VB SYS 12VA SYS reactor 5 1VD LGC 12VD LGC Fo 24VG LGC az Noise dl 4X oETO 24VF RADF filter 3 3VB SLG l 5 1VE SLG 12VC SLG 5 1VF PLG 5 1VG PLG 3 3VA PLG 12VB PLG 5 1VH FIN JUNE 2002 TOSHIBA TEC 17 7 e STUDIO550 650 810 POWER SUPPLY UNIT 17 6 Power Supply Sequence ON 0 200 20ms 10ms 20 5 1 4 95V or more Of PWR DN r more more more Ba A more Within 10ms 3 2V or more f 8 gt or 0 200
212. nd the gate has been switched it is discharged to the outside of the copier by the exit roller without being transported to the reverse path JUNE 2002 TOSHIBA TEC 15 1 e STUDIO550 650 810 EXIT REVERSE SECTION a 3 sheets x 1 copy Single sided printing operation A4 LT y gg 8 87 EO C 1 gt 8 8 8 8 P Step 2 2 8 8 5 0 oo Step 3 2 1 9 8 5 5 58 A 4 85 0 9 2 88881 5 e STUDIO550 650 810 EXIT REVERSE SECTION 15 uo 888 Step 6 98 Qe 3 8889 Step 7 En 9 8 8 8 8 4 Step 8 JUNE 2002 TOSHIBA TEC 6 5 sheets x 1 copy Duplex printing operation A4 LT L 8 8 7 97 8 5 8 2 7 1 Step 6 64 8 E 8 4 D 51 Ej 2 E ye gt 4 3 8 1 8 Po Q 9 9 co ue pose 8 9 8 5 P Step 9 4 4 5 1 4 lt ham lt 8 8 JUNE 2002 TOSHIBA 15 3 e STUDIO550 650 810 EXIT REVERSE SECTION sheets x 1 copy Single sided printing operation A3 LD B4 LG A4 R LT R Co OO 4 2 e STUDIO550 650 810 EXIT REVERSE SECTION 3 8 2 3 6 6 87 Step 6 15 4 JUNE 2002 TOSHIBA TEC 4 sheets x 1 copy Duplex printing operation A3 LD B4 LG A4 R LI R 3 OO F 8958 2
213. ndem LCF transport motor and transport clutch are turned OFF and the transport roller is stopped E 4 Error detection a Jam detection 1 A paper jam occurs in the following cases a Feed sensor is not turned ON within a specified time after the feeding has started b The leading edge of the paper does not pass the feed sensor in the transport path within a fixed time 2 Open the feed side lower cover and remove all the paper remaining on the transport path and close the cover to clear the jammed paper If either of the feed sensors is still ON when the cover is closed it is determined that there is still paper on the transport path and the paper jam status is not canceled 3 When a paper jam occurs in the paper feeder during multiple copying the sheet that was fed before the jam is copied normally e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 8 JUNE 2002 TOSHIBA TEC b Call for service 1 When the tandem LCF tray up sensor is not turned ON even through a specified time has passed since the tray started to be raised it is assumed that the tray cannot be used there is no paper and the corresponding message is displayed on the control panel 2 When the tandem LCF tray bottom sensor is not turned ON even through a specified time has passed since the tray started to be lowered it is assumed that the tray cannot be used there is no paper and the corresponding message is displayed on the control panel 3 When the end fence s
214. ng I es 010 861 vie z 6 YES A8 2 12 es7 EE gt gt 332 gt mM DE BPi gt se 93993 2 f css ups 22 zou 10 0 5 Sit prem ee A eq c C418 ____ E e m 10 50 1623 7407 ee e F R648 rsss EIS L PL gt a 952 e 3 E EE 1C34 TD62503F q11 09 2 gt 4 8659 URBES HS gi a i 1608 2 415 18 pig 011 ase 1654 TD62308AF I bed R670 resa 1 5 ez pme n 18393 4 411 817 z HC244 a R12 o Q gt os 1685 1081 TD82385AF I J pls 4 2 9 ue NN 2 1672 5 ZEE ieee 222 sS Ld 4 r 57 015 z 2 2 VHCO4 22 25 me memel ir 5 HC278 et aaan ga 1688 e ie 4 162 05 e gt eo 2 b 1 32 TD62308AF TD62385AF 22222 gr 1 5 Nees 8 25 2 els a HHH 03441 44 HF T 91 LD 772 ge ae ee 1 1053 man Deven pic TECH 1056 RIES nens 1 1 2 1625 ASS 41 HTRCK RieI 2222 7 7407 Os eh CEEE e 2 5 LE cin I 1661 R168 e ale a je HC273MTCX 3 O 6 WRRAM S 1640 a __
215. ning section and the large original exit solenoid turns ON too The large original exit motor starts to accelerate when the trailing edge of 1st original has passed the 3rd roller and prceeded a specified distance When the leading edge of the original has been transported to the large original exit side and come to the 3rd roller the disengagement solenoid turns ON The large original exit motor starts to slow down when the trailing edge of 1st original has passed the intermediate transport roller e STUDIO550 650 810 RADF 16 14 JUNE 2002 TOSHIBA TEC The SCN STR turns OFF when the trailing edge of the original has passed the scanning section At the same time both the read and the large original exit motors start to accelerate and the disengagement wel NG solenoid turns OFF 5 E e RL ET _ ONES 1 DPA gt When the trailing edge of the original has passed the 4th roller then proceeded a specified distance the large original exit motor starts to slow down After the large original exit sensor has detected the trailing edge of the original
216. nner CPU Image processing circuit Construction of exposure lamp control circuit JUNE 2002 TOSHIBA TEC 6 7 e STUDIO550 650 810 SCANNING SECTION 6 4 2 lamp External electrode type Xenon fluorescent lamp is used as exposure lamp in this copier 1 Structure The fluorescer is applied to the in side surface of the lamp pipe ex cept for a part which serves as an opening which is filled with the Xe non gas A pair of the external electrodes covered by film with adhesive agent is attached around the pipe 2 Behavior inside the lamp The electron inside the pipe is led to the electric field by applying volt age to the pair of the external elec trodes and the discharge is started The electrons then flow and clash with the Xenon atoms inside the pipe to excite them and allow them to generate ultraviolet rays This ultra violet rays convert the fluorescer into visible light e STUDIO550 650 810 SCANNING SECTION 6 8 PET film Aluminum tape electrode Glass valve Fluorescer Adhesive agent Xenon gas 7 SM f 2 4 A 1 Electrode 2 Electron 3 atom 4 Ultraviolet 5 Fluorescer 6 Visible light irradiated from the opening to outside the pipe 7 Opening 8 Harness JUNE 2002 TOSHIBA TEC 6 4 3 Control circuit for lamp Kenon lamp 5V 5VSW Q3 RN2401 es HCTO
217. ntrol Start controlling e g during the pre running after the power has been turned 1 Setting of the reference image formation condition 2 Adjustment of the sensor light source 3 Formation of the test pattern 4 Reading of the value for the image quality sensor 5 Determination Back to 3 Is the toner amount of the test pattern within the permissible amount NO 6 Changing of the image formation condition YES 7 Finish controlling Reflecting the determined image formation condition to the following printing e STUDIO550 650 810 DRUM CLEANER UNIT 11 4 JUNE 2002 11 4 4 Construction Image quality sensor Emitting of the light which corresponds to the light control voltage to output the voltage which corresponds to the reflective light amount for the toner image on the drum e D A converter Outputting of the light source light control voltage Laser optical unit Carrying out the test pattern exposere to form the toner image A D converter Converting of the sensor output voltage into the digital value e Image formation process system Charging Laser exposuring Developing e CPU Carrying out of the procedure 1 7 described in the previous page Image formation process system Laser exposure Main charger Developing Image quality sensor Test pattern Reflected light amount signal Light source amount signal
218. oconductive gt drum Magnetic roller 5 e STUDIO550 650 810 COPY PROCESS e Additional Explanation The life of the toner cartridge number of copies varies depending on the following conditions Coverage of originals printing image ratio of the original size and density of original background 2 Size and density of originals 3 he existence of solid black when making copies when a book is copied and the original cover is partially open 4 Temperature and humidity in the room when making copies 5 Copy 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 Type of originals Wa ov 4 Tam EUM IEZZZZZZZZZZZZZEEEEEEEEEIEEIEEEHEEEEERERIEENEEE 5 555555555555555557557555554557 e STUDIO550 650 810 COPY PROCESS 3 6 JUNE 2002 6 Transfer Separation Transfer Transfer is a process of transfering the toner image visible image formed on the drum surface onto the paper An electric charge applied by the high voltage power supply flows to the transfer belt from the power supply roller Then it flows to the paper and photo conductor The toner which has been developed on the photo conductor is transfered to this paper with an electric charge Separation The paper is absorbed to the belt and separated from the drum by the electrostatic attraction ac
219. ode on the laser driver board and it is rediated on the drum through the optical elements such as cylinder lenses polygonal mirror and 18 lens This unit must not be disassembled in the field since it is finely adjusted and very sensitive to dust Laser optical unit exterior view JUNE 2002 TOSHIBA TEC 8 1 e STUDIO550 650 810 LASER OPTICAL UNIT Laser emission unit 1st laser drive PC board 18 laser diode Finite focus lens 2nd laser drive PC board f lens 2 2nd laser diode Finite focus lens Slit glass Laser light exit Hear side Laser optical unit overview e STUDIO550 650 810 LASER OPTICAL UNIT 8 2 JUNE 2002 TOSHIBA TEC 8 2 Structure 1 Laser emission Unit This unit consists of the laser diode finite focus lens and aperture a 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 Laser diode radiates the laser beams responding to the laser emission control ON OFF signals from the laser drive board Laser beams which passed through the finite focus lens are focused on the drum surface b Caution The beam of the semiconductor laser is very weak about 5 mW but focused parallel rays creates great energy which is hazardous Some material of the components of the laser optical unit are metal Since the unit is in a sealed container there is no d
220. of pulses it takes for an original to proceed the distance from the original length sensor to the registration sensor plus 60mm e STUDIO550 650 810 RADF 16 32 JUNE 2002 TOSHIBA TEC 3 Original jammed not reaching the read sensor Jam detection This jam is detected during the time after an original comes to the 1st roller until it reaches the read sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for an original to proceed the distance from the 1st roller to the read sensor plus 60mm 4 Original jammed at the read sensor from the feeding side Jam detection This jam is detected during the time after an original passes through the 1st roller until it passes through the read sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for an original to proceed the distance from the 1st roller to the read sensor plus 30mm 5 Original jammed at the read sensor from the large original exit side Jam detection This jam is detected during the time after the scanning of an original from the large original exit side set at the scanning position until the original passes through the read sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for the longest original LD to pass through the read sensor and proceed more 30mm 16 6 3 Jams at large original exit secti
221. of the large original exit motor and the motor circuit The drive pattern signal is input into IC2 5 6 16 17 to control the speed and direction of the motor rotation The PWM signal is input into LMOT CU and separated and smoothed at R90 R85 and C86 and it is input into IC2 3pin RefA and14pin RefB to set the motor current value The motor current value can be changed by altering duties of the PWM signal 6 Drive circuit for disengagement solenoid small original exit solenoid and large original exit solenoid This circuit controls the closing opening of the flappers of the disengagement small original exit and large original exit solenoids When the level of ESSOL SSOL LSOL is H Q9 010 Q11 are turned ON and the are closed The drive signal for the disengagement solenoid is a PWM signal The flappers are closed in the maximum torque of the solenoids and the duty value becomes 10096 when the flappers start to be closed After finishing closing the duty value is decreased down to 50 and the flappers are kept closed while the temperature rise of the solenoids is being lowered TP32 5501 D 1 35 RSOL D TP69 LSOL D JUNE 2002 TOSHIBA 16 65 e STUDIO550 650 810 RADF 7 Reset circuit 5V VOL Sse C24 GND C89 4 SGND 5 Wa R9 SGND gt RESETIN This circuit generates a CPU reset signal when the power is turned ON and the power voltage is detecte
222. of the original has passed the scanning section the SCN STR turns OFF and both the read and large original exit motors start to accelerate Feeding of 2nd original begins when the trailing edge of the original has passed the 4th roller JUNE 2002 TOSHIBA TEC 16 19 e STUDIO550 650 810 RADF When the trailing edge of the original has passed the 4th roller then proceeded a specified distance the large original exit motor starts to slow down After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a specified distance Then the original is discharged Both the read and feed motors stop when 2nd original has reached the scanning waiting section 6 Start of 2nd original scanning Scanning begins after receiving the original transport signal from the copier At the same time the Original stop signal is reset When the read motor starts to rotate forward the feed motor also starts to rotate in reverse The large original exit solenoid has been ON from 1st original The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor starts to rotate in reverse when the leading edge of the original has been transported to the large original exit side and come to the 3rd roller When the registration sensor has detected the tra
223. on 1 Original jammed not reaching the large original exit sensor while discharging Jam detection This jam is detected during the time after an original comes to the 4th roller until it reaches the large original exit sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for an original to proceed the distance from the 4th roller to the large original exit sensor plus 30mm JUNE 2002 TOSHIBA TEC 16 33 e STUDIO550 650 810 RADF 2 Original jammed at the large original exit sensor while discharging Jam detection This jam is detected during the time after the leading edge of an original passes the position 20mm further from the 4th roller until it passes through the large original exit sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for the leading edge of an original to proceed the distance from the position 20mm further from the 4th roller to the end of the large original exit sensor plus 60mm 3 Original jammed not reaching the large original exit sensor while registering the back side Jam detection This jam is detected during the time after the back side registration or transportation to the 1st roller starts untill an original reaches the large original exit sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for an original to proceed the distan
224. onal view 14 2 Operation At the fuser unit the toner is fused on the paper which has been separated and transported from the photoconductive drum by applying heat and pressure to it The fuser roller is rotated by the driving of the fuser motor and has an IH coil inside which does not rotate itself The fuser and pressure rollers are always pressured by a spring force After being fused the paper is separated smoothly from the fuser roller by the separation fingers The thermistor detects the fuser roller temperature to control it and when the temperature becomes abnormally high which is detected by the thermostat the power supply to the IH coil is cut off JUNE 2002 TOSHIBA TEC 14 1 e STUDIO550 650 810 FUSER UNIT 14 3 Functions 1 IH coil IH Induction heating The IH coil is inside the fuser roller and applies the induction heat to the fuser roller This IH coil is divided into two parts the center IH coil heating the center of the fuser roller and the side IH coil heating both ends of the fuser roller Those parts become ON OFF separately to always keep the fuser roller at a certain temperature without wasting excessive electric power 2 Fuser roller The fuser roller is made of iron and induction heated by the IH coil It is pressed by the pressure roller which is mentioned below and the toner is fused on the peper while the paper is passing through between these two rollers with the toner image on the paper facing
225. or is turned OFF to stop the tray The end fence solenoid and pickup solenoid are then turned ON The end fence motor rotates forward and the paper on the standby side tray is moved onto the feed side tray The end fence motor is stopped for a second when the end fence stop position sensor is turned ON and the motor immediately starts to rotate in reverse to return the end fence to the position where the end fence home position sensor is turned ON When the returning operation is started the end fence solenoid and pickup solenoid are turned OFF and the tandem LCF tray up motor is rotated forward to raise the tray The tandem LCF tray up motor is turned OFF when the tray being raised turns ON the tandem LCF tray up sensor and stops the tray At this time the presence of paper is judged when the tandem LCF empty sensor is ON 2 Whe the power is turned ON after the tray unit is removed the tandem LCF tray up motor for that tray is not turned ON The tray is raised as soon as the tray unit detects that there is paper on the tray When either of the tandem LCF feed sensors is ON there is paper at the transportation path in turning ON the power a paper jam is occuring and the operation is disabled until the paper is removed JUNE 2002 TOSHIBA TEC 9 7 e STUDIO550 650 810 PAPER FEEDING SYSTEM E 2 Standby status 1 Trays detect the paper as described above and the copier goes into the standby status 2 The tray goes down automatically
226. or the jam pulse is the equivalent number of pulses it takes for an original to proceed the distance from the 3rd roller to the intermediate transport sensor plus 30mm 2 Original jammed at the intermediate transport sensor Jam detection This jam is detected during the time after the trailing edge of an original passes the position 20mm further from the 3rd roller until it has passed through the intermediate transport sensor Jam pulse setting The setting value for the jam pulse is the equivalent number of pulses it takes for the trailing edge of an original to proceed the distance from the position 20mm further from the 3rd roller to the intermediate transport sensor plus 60mm e STUDIO550 650 810 RADF 16 36 JUNE 2002 TOSHIBA TEC 16 7 Errors Errors be divided into the sensor adjustment error EEPROM error and tray lift motor error 1 Sensor adjustment error There are 4 kinds of sensor adjustment errors 1 Original length sensor adjustment error 2 Read sensor adjustment error 3 Large original exit sensor adjustment error 4 Small original reverse sensor adjustment error The D A output voltage is adjusted so that the A D input voltage for each sensor is kept within the range between 3 16V 3 55V while carrying out the EEPROM initialization and all sensor adjust ment at the adjustment mode At this time the sensor adjustment error occurs when the D A output voltage cannot be adjusted within the range between 0 04V 2 9
227. ory is renewed at each line a Enlargement reduction The enlargment reduction is accomplished by using the line memory control function in the process of the image processing operation Example Enlargement Example Reduction b Mirror imaging This is accomplished by reading and outputting data from its end 3 Edit processing This function performs trimming masking and negative positive reversing a Trimming Using rectangular area signals the image signals inside the rectangular area are left and the other image signals outside the area are eliminated b Masking Using rectangular area signals the image data inside the rectangular area are erased c Negative positive reversing This function reverses the entire data from negative to positive or vice versa 4 Gamma correction This function corrects the input output characteristics of the scanner printer and adjusts the image signals so that their input output characteristics match with the copy mode b Gradation processing This function works for genuine reproduction of halftone image such as photographs 6 External output system interface This function controls the output of the output interface between the SLG board and the SYS board PWA F SYS 340 e STUDIO550 650 810 IMAGE PROCESSING 7 6 JUNE 2002 7 4 Board PWA F PLG 340 7 4 1 Features The image processing ASIC on the PLG board is controlled by the CPU on the PLG
228. otating An FG pulse is generated by the rotation of the fuser motor The phases and velocities of the FG pulse and the reference frequency from the LGC are compared and the differences are added up In addition to this are added the fluctuations in the supply voltage Signal generation The switching timing for the excited phase switching unit is changed to match the signal obtained in step 6 That is control ensures that the FG pulse and reference frequency are equal gt The fuser motor rotates at a constant speed locked range state When the HTRML signal changes to H level the fuser motor stops rotating During standby the HTRML level changes LU if the temperature of the pressure roller drops below the reference temperature and the fuser motor rotates at a low speed JUNE 2002 TOSHIBA TEC 14 11 e STUDIO550 650 810 FUSER UNIT 14 5 2 Control signals 1 HTRCK signal LGC MOT Input This signal is a reference clock signal for the fuser motor to rotate at fixed speed The frequency of the reference clock is 1247 6Hz 2 HTRML signal LGC MOT Input This signal switches low speed fuser motor rotation ON OFF When the signal is L the fuser motor rotates at a low speed 3 HTRMT signal LGC gt MOT Input This signal is the fuser motor ON OFF control signal When the signal changes to the fuser motor is turned ON Signal level for motor circuit HTRCK Reference clock 1247 6Hz
229. otor ON Discharge lamp ON Transfer belt motor ON Drum motor ON Used toner transport motor ON Recycle toner transport motor ON Process system Transport system Scanning system control control control NO polygonal motor ON YES Call for service Laser ON Intermediate transport clutch Intermediate transport Transfer beli bias clutch OFF Registration motor Carriage stopped lamp OFF Drum separation finger solenoid ON Drum separation finger solenoid OFF Registration motor OFF Transfer belt bias OFF Carriage moving backward Call for service remaining set number 0 Carriage stopped Scanning system control finished YES Laser OFF Process system control finished B Paper jam E01 JUNE 2002 TOSHIBA TEC 4 13 e STUDIO550 650 810 GENERAL OPERATION fuser unit exit sensor E02 Main charger OFF Discharge lamp OFF Developer bias OFF Drum motor OFF Transfer belt motor OFF Fuser motor OFF Developer unit motor OFF Recycle toner transport motor OFF Used toner transport motor OFF Standby e STUDIO550 650 810 GENERAL OPERATION 4 14 JUNE 2002 TOSHIBA TEC 5 CONTROL PANEL 5 1 Control Panel and Display Panel 5 2 Items Shown on Display Panel 5 2 1 Display during normal copying 5 2 2 Display in abnormal condition 5 3 Relation between Copier State and Operator s Action 5 4 Oper
230. over and open Connector the exit cover 2 Disconnect 3 connectors and release the harnesses from 4 clamps 3 Unhook the exhaust duct with sliding it toward t the front side and pull it out 70 VA i 4 Disconnect 1 connector pull out the duct Duct out fan out fan 5 Remove 2 screws and take off the exit fan with the bracket 6 Remove 2 screws and release the exit fan from the bracket Exit fan e STUDIO550 650 810 PROCESS RELATED SECTION 10 12 JUNE 2002 TOSHIBA TEC 11 DRUM CLEANER UNIT 11 1 Construction 11 2 Functions 11 3 Drum Temperature Detection Circuit 11 4 Image Quality Control 11 4 1 General description 11 4 2 Principle of sensor 11 4 3 Outline of control 11 4 4 Construction 11 5 Disassembly and Replacement 11 DRUM CLEANER UNIT 11 1 Construction This chapter describes about the drum and cleaner unit related units parts control circuit etc The cleaner unit consists of the drive section cleaning section recovered toner transport section image quality sensor drum separation finger etc Drum cleaning blade Drum thermistor Drum cleaning brush Recovered toner
231. per from the fuser unit to the reverse path where the paper is switched back and reversed and then transports it to the exit roller or transfer section 2 Name 6 Horizontaltransportroler2 8 Horizontal ransportoler 4 sectional view 15 2 Operation The paper from the fuser unit is transported to the reverse path by the gate which is usually directed toward the reverse path and switched by the solenoid only when the reverse operation is not carried out When the trailing edge of the paper has passed through the exit sensor at the fuser unit the paper transport speed at the transport path is switched to a high one and switched back in a specified time after that The paper is transported to the exit roller with keeping the high speed and discharged to the outside of the copier When carrying out a duplex printing the paper switched back at the reverse path is transported to the horizontal transport section which is under the transfer transport unit and switches the paper transport speed to a normal one at this time and it is again transported to the transfer section and fused there Then after the duplex paper has passed through the fuser unit a
232. port guide 3 Release each latch disconnect each connector and take off the registration sensor and original width sensors e STUDIO550 650 810 RADF 84 Read sensor A we Upper transport guide 9 Original width sensor JUNE 2002 TOSHIBA TEC Platen guide Platen guide 1 Remove 2 screws fixing the platen guide 2 Move the platen guide toward the direction of the white arrow until the right side edge of the guide can be seen 3 Remove the platen guide toward the direction of the white arrow
233. r detection during warming 2 0 If the output voltage of either the center thermistor or side thermistor rear does not go over approx 1 9V 100 C even in a certain period of time after it has exceeded 40 C if it does not go over approx 3 2V 150 C even in a certain period of time after it has exceeded 100 C the Call for service C44 is displayed 6 Error detection during warming up 3 If the output voltage of the thermistor does not go over approx 4 0V 200 C even in a certain period of time after it has exceeded 150 C the Call for service C44 is displayed 7 Abnormality detection during standby copying If the output voltage of either the center thermistor or side thermistor rear becames 0 5V or lower for more than 0 5 sec the Call for service C43 is displayed and if that of the side thermistor front becomes 0 5V or lower for more than 0 5 sec the Call for service C45 is displayed 8 Fuser roller thermistor error status counter To enhance the safety of the fuser unit CPU provides the following protection When the third C41 error has occurred after two consecutive C41 errors even if an operator turns OFF the power and back ON the IH coil is not turned ON and error C41 is displayed immediately However if the copier becomes ready successfully with the fuser roller thermistor error status counter 1 or below the counter is cleared to 0 Note If the heater is not turn
234. r scanning and waiting key is pressed under the condition the for the operator to select the copying printing Ul is displayed JOB conditions STATUS key pressed after adding No tab paper tab paper READY FINISHER Ready for scanning Printing is started when pressing the IN USE The copier is ready for scanning and waiting START key for the operator to select the copying conditions Finisher manual operating e STUDIO550 650 810 CONTROL PANEL 5 4 JUNE 2002 5 2 2 Display abnormal condition 1 Add paper Paper out Fig 5 2 1 Add paper to the cassette The cassette with no more paper flashes Select a different cassette 2 Add toner Toner run out Fig 5 2 2 Replace the toner cartridge and close Press HELP The toner cartridge is empty the front door The message is displayed and the copier is stopped Set key copy Key copy counter not installed Fig 5 2 1 C Insert the key copy counter option counter The key copy counter was pulled out when copier was ready for scanning The copier is stopped when the key copy counter is pulled out after the START key was pressed 4 Paper misfeed in Bypass paper jam Fig 5 2 2 D Remove the paper from the bypass bypass Paper jam at the bypass tray tray 5 Misfeed in copier Paper jam in the copier Fig 5 2 2 E Press the HELP key and remove the Press HELP paper following the messages shown on
235. r seal aligning the double sided tape edge with the guide window edge Double sided tape must not be out of the guide window edge Double sided tape on the back e STUDIO550 650 810 RADF Mirror seal 16 88 Ref Large original exit guide Attatch the mirror seal passing through the guide window to prevent twisting and too strong contact on the edge of the guide window JUNE 2002 TOSHIBA TEC l 4 Mirror seal for small original reversal sensor Ref Attatch the mirror seal 0 0 5 mm with fitting the edge of it to the rib Do not interfere the rib Under transport guide for small original
236. r stop position switch Note When installing the switch fix it with pushing it toward the arrow Also pay attention to the color of the harness when connecting the connectors to the terminals and then bend the terminals 45 degrees C Discharge lamp 1 Remove the main charger and cleaner unit 2 Disconnect 1 connector remove 1 screw and take off the discharge lamp D Ozone filter 1 Remove 1 screw and pull out the ozone filter at the exit side Connector e STUDIO550 650 810 PROCESS RELATED SECTION 10 10 JUNE 2002 TOSHIBA TEC Surface potential sensor 1 Take off the developer unit main charger cleaner unit and control panel bottom cover 2 Disconnect 1 connector remove 1 screw and take off the bracket Bracket 3 Disconnect 1 connector remove 1 screw and take off the surfave potential sensor Connector Surfave potential sensor F Temperature humidity sensor 1 Take off the control panel unit Chap 5 5 2 Disconnect 1 connector remove 1 screw and take off the temperature humidity sensor Temperature humidity sensor JUNE 2002 TOSHIBA TEC 10 11 e STUDIO550 650 810 PROCESS RELATED SECTION Exhaust duct 1 Take off the exit side upper c
237. r unit sectional view JUNE 2002 TOSHIBA TEC 12 1 e STUDIO550 650 810 DEVELOPER UNIT 12 2 Functions 1 Toner cartridge drive unit The toner cartridge is filled with toner and supplies it to the developer unit with the driving the new toner supply motor 15 Toner recycle unit This copier takes a toner recycle method The toner recovered from the drum surface with the cleaner is transported to the developer unit by the toner recycle unit and then reused Developer unit a Developer material The developer material consists of the carrier and toner The carrier is made up with the electrically conductive ferrites which size is as big as 30 100um and the toner is made up with the resin particles which size is as big as 5 20um Since the developer material gets deteriorated after a long time of use regular replacements are needed b Mixer unit When stirring the developer material the carrier and toner are frictionized each other causing the carrier to have a positive charge and the toner to have a minus charge The toner adheres to the drum surface as a result of the electrostatic force c Paddle The paadle supplies the developer material stirred with the mixer unit to the transport sleeve and gets the material separated from the lower developer sleeve back to the mixer d Transport sleeve Developer sleeve magnetic roller These rollers are made of aluminum each having a magnet inside With this magnet the
238. reading reading Width Size receiving receiving i 1196 0 mm mode receiving pro length 2882 decided ORG IN 1ORG IN lor over ORG IN hibited detected decided over e STUDIO550 650 810 RADF 16 40 JUNE 2002 TOSHIBA TEC 16 9 Flow Chart 1 Power Start of communication line Jig board installed gt YES Program rewritten Data read from EEPROM NO Cover closed Sensor adjusted Communication started JUNE 2002 TOSHIBA TEC 16 41 e STUDIO550 650 810 RADF 2 Rewriting of flash ROM Normal ROM installed on jig board NO ROM abnormality Flash ROM deleted displayed on LED Flash ROM succeeded to delete Failure of deleting flash ROM Flash ROM rewritten displayed on LED Flash ROM rewriting succeeded Success of rewriting Failure of rewriting displayed on LED displayed on LED Flash ROM rewriting completed e STUDIO550 650 810 RADF 16 42 JUNE 2002 TOSHIBA TEC 3 Start of communication line Operation monitoring a Operation started Cover closed YES NO All sensors OFF Operation completed YES Initialization Cover opened YES Initialization detected jam Finished due to jam YES Cover open Original setting signal received YES Cover opened JUNE 2002 TOSHIBA TEC 16 43 e STUDIO550 650 810 RADF 4 Initiali
239. riginal exit solenoid RADF open close sensor APS operation sensor Cover open close switch RADF open close switch e STUDIO550 650 810 RADF 16 2 JUNE 2002 TOSHIBA TEC 16 3 Drive System 1 Feed motor rotating forward seen in front One way pulley lock c t One way pulley idling As C OR Feed motor Y REN 42 Feed motor rotates Registration roller clockwise to feed originals Front 2 Feed motor rotating in reverse seen in front One way pulley idling One way pulley lock 20 AR SET Ne 274 Hear BON ee Feed motor rotates a counterclockwise to feed originals Front 2002 16 3 e STUDIO550 650 810 RADF 3 Read motor rotating in reverse seen in front Large original Large original exit motor Rear exit roller Large original exit motor swiches to the backside of an original by rotating clockwise and registers Read mot NG ead motor at that side SEN D gt UK OY Intermediate transport roller Head motor rotates counterclockwise to transport scan and Front discharge originals Read roller 4 large original exit motor rotating in reverse seen in front One way pulley Small original exit motor Large original exit motor Small original exit motor rotates clockeise to transport and discharge originals A 5 Smal
240. rm 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 1 wider at both ends than at the center of the scanning range The f lenses help to correct this difference making all the dot to dot pitches equal on the drum surface Face tilt connection Thereflecting face of the polygonal mirror is tilted slightly to one side against the perfect vertical Horizontal deviation of the laser light which is caused by the tilt is corrected Sectional shape of laser beam The shape of the laser beam spotted on the drum is adjusted H Sync detection PC board Narrower Same intervals Fig 8 2 2 Mirror plane is tilted Deviation Fig 8 2 3 The laser light which is started to be scanned from one of the reflected face of the polygonal mirror is reflected by the H Sync detection mirror and goes into the PIN diode on the H Sync detection PC board The primary scanning synchronizing signal is generated based on this reflected laser light The rudder sensor is attached to the H Sync sensor to evenly space 42 3um by its detection value the intervals of the secondary scanning of the first and second beams JUNE 2002 TOSHIBA TEC e STUDIO550 650 810 LASER OPTICAL UNIT 5 Laser drive board This control board has the following functions a control function adjusts disparity of the laser intensity caused
241. s to rotate to lift the tray Then the tray lift motor stops lifting the tray when a specified number of counts is counted after the upper limit sensor has detected the top side of the original The empty sensor detects whether or not there is a next original when a specified time passes after the the registration sensor has detected the trailing edge of the original With a next original separating begins Without it the tray lift motor starts to rotate to lower the tray and the original set signal is reset The tray lift motor stops rotating when the lower limit sensor has detected the tray e STUDIO550 650 810 RADF 16 28 JUNE 2002 TOSHIBA TEC The large original exit motor starts to slow down when the trailing edge of the original has proceeded specified distance after passing the 4th roller After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the original has proceeded a specified distance The original is nipped by the large original exit roller WA 5 Start of back side registering Same operation as 16 5 2 6 6 Start of back side feeding Both the large original exit and read motors start to rotate forward After the leading edge of the original has reached the read sensor and been transported a specified distance by the read motor the disengagement solenoid turns ON Then the large original ex
242. s uone1 s169 440 440 MOO 7 dois MO Josues Josues 110 dois 10104 i 108095 19M0 110 NO 440 Josues jiu e STUDIO550 650 810 RADF 16 59 JUNE 2002 TOSHIBA TEC Two sheets of 4 single sided original _ 6212 6092 9092 892 6692 9870 _ 6 12 0246 ovez L1 9902 226 0191 __ ___ _ mi LO 0 61 7801 ELE sw 0002 0009 0009 0007 000 0002 0001 0 PIOUSIOS eus NO 108095 IO S We Josues jews H MOO M99 dois ews 71 MO H MO NO Josuas 1 Josues 110 NO Iouogjos 440 5 1 440 H MOO M99 dois 71 MO H MO NO AAO dois 7 MO H MO plougjos x HLS N9S reubiIs pes ie Josues
243. scharge None Same as 6570 5570 10 Cleaning 1 System Blade Brush Same as 6570 5570 2 Recovered toner Not acceptable Reuse by the toner recycle system 11 Cleaning brush bias Varistor 430V e STUDIO550 650 810 COPY PROCESS 3 10 JUNE 2002 TOSHIBA TEC Process 6570 5570 e STUDIO550 650 810 12 Fusing 1 System Long life heat roller system Same as 6570 5570 Fuser roller Fuser roller Fluoroplastic coated roller 60 Fluoroplastic coated roller 960 Pressure roller Pressure roller PFA tube roller 60 PFA tube roller 960 2 Cleaning Fuser roller cleaning roller 033 Cleaning web for fuser roller cleaning Cleaning felt roller 227 Pressure roller cleaning felt roller 228 Pressure roller cleaning felt roller Cleaning metal roller Pressure roller cleaning metal roller 3 Heater Halogen lamp Lamp system IH coil Induction heating system Lamp rating 800W 300W ON OFF control by thermistor Same as 6570 5570 JUNE 2002 TOSHIBA TEC 3 11 e STUDIO550 650 810 COPY PROCESS 4 GENERAL OPERATION 4 1 Overview of Operation 4 2 Operation 4 2 1 Warming up 4 2 2 Standby state ready for copying 4 2 3 Cassette feed copying with START key ON 4 2 4 Bypass copying 4 2 5 Interrupt copying 4 3 Abnormality Detection 4 3 1 Abnormality classification 4 3 2 Abnormality description 4 4 Flow Chart 4 4 1 Power ON to ready 4 4 2 Automatic feed copying 4 G
244. sion spring on the tension bracket and frame Then tighten up the screws while stretching the timing belt Note Make sure that the timing belt is not moved to the edges e STUDIO550 650 810 RADF 16 76 JUNE 2002 TOSHIBA TEC E 2 Tray lift motor 1 Remove the ADF rear cover 2 Remove the ADF board with the bracket 3 Remove 2 screws and take off the tray lift motor with the bracket 4 Pull out 2 pullies from the shaft and release the tray lift motor from the bracket E 3 Read motor 4 1 Remove the ADF rear cover 2 Remove the tension spring 3 Disconnect 1 connector 4 Remove 2 screws and take off the read motor with the bracket 5 Remove 2 screws and release the read motor from the bracket __ 2 Tension s N ARN Installing procedure 6 Install the read motor to the bracket While hunging the timing belt around both pullies at the RADF unit and read motor move the bracket downward and tack it there temporarily with 2 screws 7 Hook the tension spring on the brackets 8 Loosen the screws temporarily and tighten them up while stretching the timing belt Note Make sure that the timing belt is not moved to the edges JUNE 2002 TOSHIBA TEC 16 77 e STUDIO550 650 810 4 Small original ekit motor 1 Remove the ADF rear cover 2 Remove the ADF
245. sized original are set on RADF and one of the copy modes in the left table is selected 1st cassette is selected and copying is at the sort mode Finisher hole punch unit and inserter are installed Measurement deviation is included since the system copy speed was measured by actual measurement JUNE 2002 TOSHIBA TEC Copy paper __ Cassette Duplexcopy LCF Bypass copy Remarks A3 A5R A3 A5 R LD ST R guarantee for 8K LD ST R 13 LG 8 5 x8 5 8 5 x8 5 8K 16K 16K R 16K 16K R at duplex 8K 16K 16K R Non standard or user copy specified sizes can be set Weight 64 209g m 17 1101 index 64 209g m 176 1106 index Special Tab paper Tracing paper labels Special types of paper paper 2nd casette only OHP film thickness should be recommanded 80um or thicker tab paper by Toshiba First copy time 3 3 seconds or less A4 LT LCF 100 original placed manually e Warming up time Approx 160 seconds e STUDIO550 650 810 Temperature 20 C Notes 1 This is at the condition not entering the toner supply operation 2 The auto job start is not operated e Multiple copying Up to 9999 copies set number entered with digital keys e Reproduction ratio Actual ratio 100 0 5 Zooming 25 400 in increments of 1 25 200 when using the RADF e Resolution Gradation Read 600 dpi Write Equivalent to 24
246. solenoid bracket disconnect 1 connector and take off the disengagement solenoid with the bracket 5 Remove 2 screws and release the disengage ment solenoid from the bracket JUNE 2002 TOSHIBA TEC 16 79 e STUDIO550 650 810 RADF Sensors Switches G 1 Lifting tray upper limit sensor Empty sensor Cover open close sensor 1 Open the jam access cover remove 2 screws and take off the upper guide cover 2 Disconnect the connectors and release the latches and take off the lifting tray upper limit sensor empty sensor and cover open close sensor G 2 Lifting tray lower limit sensor 1 Remove the upper guide unit 2 Remove 2 screws and take off the upper guide stay 3 Open the reverse guide unjoint the front side inlet and take off the guide toward the front side 4 Remove 4 screws and take off the lower guide 5 Disconnect 1 connector and take off the lifting tray lower limit sensor e STUDIO550 650 810 RADF 16 80 Cover open close sensor ay e JAVA 29 5 Empty sensor Ca amp NG y p S Lifting tray upper limit sensor Kor uu Upper guide stay 1 i LL to wise EEE Reverse guide b 1 ze E
247. source Semiconductive laser Laser power com Laser driver circuit circuit Constant optical output Monitor effi ciency regula Monitor output tion circuit Fig 8 3 2 Block diagram Fig 8 3 2 shows a block diagram of the semiconductive laser control circuit The semiconductive laser performs monitor efficiency regulation a process to control monitor current for the light amount and laser itself is adjusted to initially output emission of approx 2 6mW 3895uW the drum surface The regulated voltage of the monitor output is given feedback to the laser power comparison circuit This monitor output voltage is compared with the laser power voltage set for the control circuit for every scanning Laser driver circuit increases the forward current if the laser power is insufficent and drecreases the current when the power is excessive to maintain a constant optical output JUNE 2002 TOSHIBA TEC 8 7 e STUDIO550 650 810 LASER OPTICAL UNIT 8 4 Disassembly and Replacement A Laser fan motor 1 Remove the top right cover feed side upper cover and feed side center cover Remove 1 screw and loosen 10 screws and take off the plate cover 2 Remove 2 screws and take off the optical unit fixing stay 3 Disconnect 1 connector and remove 2 screws to take off the laser fan motor e STUDIO550 650 810 LASER OPTICAL UNIT 8
248. sport clutch is turned ON e The leading edge of paper turns ON the registration sensor and paper is aligned with the registration roller e The transport clutch is turned OFF and the transport roller is stopped e The registration motor and transport clutch are turned ON and paper is transported to the transfer unit e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 6 JUNE 2002 TOSHIBA TEC Tandem LCF E 1 From power ON to standby status 1 When the copier is turned ON the power is supplied to start the pre running operation The tandem LCF tray up motor starts to rotate forward and raises the tray The tandem LCF tray up motor is turned OFF when the tray turns ON the tandem LCF tray up sensor and the tray is then stopped At this time it is judged whether there is paper on the feed side tray when the tandem LCF empty sensor is ON On the other hand the absence of paper on the feed side tray is assumed when the sensor is OFF and the tandem LCF standby side empty sensor is subsequently checked When the tandem LCF standby side empty sensor is OFF paper is absent on the standby side tray and it is therefore assumed that there is NO paper in the tandem LCF When the tandem LCF standby side empty sensor is ON paper on the standby side tray is moved onto the feed side tray The tandem LCF tray up motor is rotated in reverse and lowers the feed side tray The tray lowered turns ON the tandem LCF tray bottom sensor and the tandem LCF tray up mot
249. t side inner cover plate cover 5 Disconnect 7 connectors remove 6 screws and take off the SYS board 6 Disconnect 2 connectors remove 4 screws and take off the hard disk with the bracket 7 Remove 4 screws and release the hard disk from the bracket 8 Disconnect 19 connectors remove 6 screws and take off the LGC board High voltage transformer 1 Disconnect 7 connectors to the SYS board and hard disk 2 Remove 9 screws and take off the bracket with the LGC board and hard disk JUNE 2002 TOSHIBA TEC Rear feed side inner cover Rear exit side inner cover PN T
250. tab sheets sized Tab sheets Sheets and originals are different and originals the originals JUNE 2002 TOSHIBA TEC 9 9 e STUDIO550 650 810 CONTROL PANEL Abnormal state indication on display panel Solution 15 Select the same Displayed when the paper sizes for Select the same size for the inserter sized Inserter sheets inserter paper and original are different sheets and originals as the originals 16 Set Tab sheets in the Displayed when the paper directions for Set the tab sheets in the same same direction as tab paper and original are different direction as the originals the originals 17 Set Inserter sheets Displayed when the paper directions for Set the inserter sheets in the same the same direction as inserter paper and original are different direction as the originals the originals 18 Only one paper Displayed when both the cover mode and Release either the cover mode source can be used inserter cover mode are selected inserter cover mode with Cover Sheet feature 19 Only two paper Displayed when all the sheet insertion Release any of three modes sources can be used mode tab insertion mode and inserter with Sheet Insertion sheet insertion mode are selected feature 20 ADD PAPER TO Displayed when the inserter mode is valid Release the inserter mode INSERTER FEEDER and the START key is pressed without Set papers on the inserter tray papers on the tray 21 Setth
251. take off the cam drive unit 3 Disconnect the connector and take off 2 sensors Note When replacing each sensor pay attention to the board color shown in the right figure and direction e STUDIO550 650 810 TRANSFER TRANSPORT UNIT 13 10 JUNE 2002 TOSHIBA TEC 14 FUSER UNIT 14 1 General Description 14 2 Operation 14 3 Functions 14 4 Heater Control Circuit 14 4 1 Configuration 14 4 2 Heating principle of IH coil 14 4 3 IH control circuit interface 14 4 4 IH control circuit abnormalities 14 4 5 Temperature detecting section 14 4 6 Detection of open circuited thermistors 14 5 Fuser Motor Drive 14 5 1 Outline of operation 14 5 2 Control signals 14 6 Disassembly and Replacement 14 FUSER UNIT 14 1 General Description The toner is fused on the paper separated from the photoconductive drum by applying heat and pressure to it The paper is then discharged through the paper exit section The fuser unit consists of the IH coil fuser roller pressure roller separation fingers cleaning web cleaning rollers thermistors thermostat exit rollers exit sensor etc Web pushing roller Cleaning web Web motor Exit roller Thermostat IH coil Fuser roller Pressure roller thermistor Cleaning roller metal Pressure roller Cleaning roller felt Secti
252. the brackets JUNE 2002 TOSHIBA TEC 6 Glass retainer w MN 9 SSS SSS e STUDIO550 650 810 SCANNING SECTION 2 LT series APS sensor 1 the original glass 2 Take off 3 APS sensors each with disconnecting 1 connector and removing 1 screw 3 Remove the lens cover 4 Remove 1 screw and take off the APS sensors with brackets 5 Remove 1 screw and release the APS sensors from the brackets D SLG fan motor 1 Remove the lens cover 2 Disconnect 1 connector remove 2 screws and take off the SLG fan motor SLG fan motor E Exposure lamp 1 Move the carriages toward the exit side disconnect 1 connector of the exposure lamp and remove 1 screw e STUDIO550 650 810 SCANNING SECTION 6 16 JUNE 2002 2 Move the carriages to the notches the frame and take off the exposure lamp with lifting the rear side of it
253. the fuser roller So the toner soaks into the fibers of the paper by melting it with the heat of the fuser roller and improving the heat conductivity by the pressure from the pressure roller The surface of the fuser roller is coated with fluoroplastic to prevent the toner adhering to the roller the phonomenon called offset and help it separate from the fuser roller 3 Pressure roller The pressure roller is made of rubber to make it easier to press the fuser roller and always pressed by a spring force 4 Separation fingers The separation fingers take off the paper that has stuck to the fuser and pressure rollers 5 Cleaning web The cleaning web is attached in touch with the fuser roller by the web pushing roller to remove the toner and paper dust that have stuck to the fuser roller during the fusing process It is rolled up by the motor so that its clean surface always touches the fuser roller and also it contains silicon oil for coating the surface of the fuser roller which makes it easier to clean up the toner and paper dust on the fuser roller 6 Cleaning rollers The cleaning rollers are attached in touch with the pressure roller to remove the toner and paper dust that have stuck to the pressure roller during the fusing process There are two kinds of rollers a metal roller and felt roller The felt cleaning roller contains silicon oil for coating the surface of the pressure roller which makes it easier to clean up the toner an
254. the read sensor the Original size is decided by considering the information whether or not the original length sensor is ON original position base code and status of the original width sensor 1 3 Then it is transmitted to the copier However when the original length sensor is ON at the mixed original mode the original size for some combinations cannot be decided In this case the size is decided by taking into consideration the feed motor pulses counted during the time after the original is idle reversed until it passes through the original length sensor and transmitted to the copier e STUDIO550 650 810 RADF 16 38 2002 16 8 2 Original size detection chart A4 series Tray guide Tray guide Original Reversal Reversal width I width length I Size 1 Mixed Tray Switch without without Size detected decided sensor at Width originals Sensor reading reading 288 2 mm Size receiving receiving scanning 1268 4 mm 196 0 mm mode receiving length length over decided ORG IN ORG IN standby over i Over hibited detected decided mm position mm mm Le AN 196 182 eo EET OFF TOFF JUNE 2002 TOSHIBA 16 39 e STUDIO550 650 810 RADF series Reversal Reversal I width ISize 1 Mixed Tray Switch without without Size detected decided Width originals sensor back
255. ting between the belt plus charge and the polarization charge minus charge on the bottom surface of the paper Reference Combined use of transfer belt and separation finger To prevent the copy paper from failing to be separated during the operation due to incomplete transfer belt charging or absorption of moisture and thus jamming up the cleaner a separation finger mechanically separates any copy paper which fails to be separated JUNE 2002 TOSHIBA TEC 3 Transfer belt Paper Transfer belt Power supply roller Separation finger LN See san Tu ae Paper movement Transfer belt Rotation of drum 7 e STUDIO550 650 810 COPY PROCESS 7 Fusing Fusing is a process of melting and fixing the toner on the paper Method The melting point of the toner main ingredient resin is 100 110 C Heat Pressure Fusing Y The toner is melted by the heat of the surface of the fuser roller The pressure roller is pressed against the fuser roller by the springs to increase adherence of the melted toner to the paper Y Heat and pressure are applied to the paper when it passes between the fuser roller and pressure roller Thetonerisfikedon the paper 8 Cleaning Cleaning is a process of recovering the residual toner on the photoconductive drum 1 The cleaning brush scrapes off the excessive toner and paper wastes The flick
256. to 6570 5570 Process 6570 5570 1 Photoconductive drum OD 6570 OPC drum e STUDIO550 650 810 OD 6510 OPC drum Same as 6570 5570 Surface potential 650 V grid voltage 720V 700 V grid voltage 733V 2 Scolotron method constant current Same as 6570 5570 Grid output variable Same as 6570 5570 3 Surface potential controlling Surface potential sensor 2 Sensitivity Highly sensitized drum 4 Writing 1 Light source Semiconductor laser adjustment Same as 6570 5570 not required 2 Light amount 4 0 nJ mm 3 8nJ mm 6 Development 1 Magnetic roller Two magnetic rollers Same as 6570 5570 2 Auto toner Magnetic bridge circuit method Same as 6570 5570 3 Toner supply Toner hopper system Toner cartridge system There is a toner recycle system 4 Toner empty detection Density detection method lever joint Density detection system use 5 Toner 1 6570 6570 1 6510 6510 6 5100 6 Developer material D 6570J D 6510 7 Developer bias DC 400V AC DC 500V AC 7 Transfer 1 Transfer Transfer belt Transfer belt Electrical resistance is lower than 6570 5570 2 Power supply roller Power supply roller Power supply roller Separation auxiliary roller Separation auxiliary roller 8 Separation Transfer belt charging 9 Discharging 1 Discharging position Discharge by exposure after cleaning Same as 6570 5570 2 Discharge lamp Discharge by red LED Same as 6570 5570 3 Pre cleaning di
257. to the light Semiconductor laser element converts image sig nals sent from the image processing section into optical signals laser emission and exposes the drum surface to the light to form an electrostatic latent image on it JUNE 2002 TOSHIBA TEC 3 Image processing section Example CCD light Value of receiving image signals amount to be output Light 255 Difference between light and dark is divided into 256 steps Dark 0 Image processing section Laser Drive board Semiconductor laser element 8 e STUDIO550 650 810 COPY PROCESS 5 Developmeni Development is a process of making the electro Static latent images visible to the eye visible im ages Developer material is supplied to the photoconduc tive drum surface by 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 Toner Carrier always attracted onto the magnet Toner The potential 700 of the drum being 7 _ Bias voltage higher than the 500 VDC developer bias 500V 400V The potential of the drum being 4 300V oner lower than the Protocon F NE developer bias 200 SHE esce 100V drum 27777 Photoconductive layer Aluminum conductive base e STUDIO550 650 810 COPY PROCESS 3 4 Drum White background Hal
258. top position sensor is not turned ON even through a specified time has passed since the end fence started to move the paper in the standby side tray it is assumed that the tray cannot be used there is no paper and the corresponding message is displayed on the control panel 4 When the end fence home position sensor is not turned ON even through a specified time has passed since the end fence started to move the paper in the standby side it is assumed that the tray cannot be used there is no paper and the corresponding message Is displayed on the control panel 5 The states 1 to 4 are cleared by removing the tray unit JUNE 2002 TOSHIBA TEC 9 9 e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 4 Drive Circuit for Tray up Motor Cassette tray up motor MOT Driven by IC72 tray up motor 1 and IC36 tray up motor 2 LGC TA8428 Block diagram of TA8428 Thermal shut down over current protec tion circuit 1 and IN2 are input terminals to receive the signals from the microcomputer The control logic based on the signals from the microcomputer controls the rotation direction and ON OFF of the motor ws H L L JBRKE A TT L EE mon stop e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 10 JUNE 2002 TOSHIBA TEC 9 5 Disassembly and Replacement A Feed unit A 1 Pickup roller Feed roller Separation roller 1 Remove the feed side rear cover 2 Open the feed side center cover and
259. transport signal from the copier At the same time the original transport signal is reset When the read motor starts to rotate forward the large original exit motor also starts to rotate forward and the disengagement solenoid turns ON The large original exit solenoid has been ON from 1st original The SCN STR turns ON when the leading edge of the original has reached the scanning section The large original exit motor stops when the disengagement solenoid has turned ON JUNE 2002 TOSHIBA TEC 16 23 e STUDIO550 650 810 RADF When the leading edge of the original has been transported to the large original exit side and come the 3rd roller the large original exit motor starts to rotate in reverse The SCN STR turns OFF when the trailing edge of the original has passed the scanning section At the same time both the read and large original exit motors start to accelerate and the disengagement solenoid turns OFF The large original exit motor slows down when the trailing edge of the original has passed the 4th roller and proceeded a specified distance After the large original exit sensor has detected the trailing edge of the original the read motor stops rotating soon and the large original exit motor stops rotating when the Original has proceeded a specified distance Then the original is nipped by the large original exit roller e STUDIO550 650 810 RADF 16 24 JUNE 2002 TOSHIBA TEC 9 Reversing and dischar
260. tridge drive unit and toner recycle unit B Chap 12 6 Open the front cover and take off the front 2 Remove 1 screw and pull out the main main charger grid and take off the grid side right inner cover terminal cover terminal cover 10 6 Disassembly and Replacement charger A Main charger 1 3 Push the button to release the tension of the 4 Release 1 latch and take off the front side 5 Release 2 latches and take off the rear side JUNE 2002 TOSHIBA TEC 10 8 e STUDIO550 650 810 PROCESS RELATED SECTION 6 Pullup the terminal release the spring Terminal unhook the rear side hook and take off the charger wire 7 Remove 1 screw and take off the cleaning Cleaning pad pad Note When installing the cleaning pad install it so that the charger wire go through the pad side Wire B Wire cleaner drive unit Main charger 1 Removethe main charger and cleaner unit 2 Disconnect 1 connector remove 1 screw take off the charger guide Cleaner unit JUNE 2002 TOSHIBA TEC 10 9 e STUDIO550 650 810 PROCESS RELATED SECTION 3 Disconnect 1 connector remove 2 screws and take off the wire cleaner drive motor with the bracket 4 Remove 2 screws and take off the motor 5 Disconnect 2 connectors remove 1 screw and take off the wire cleane
261. u DIRE 1618 1095 2291 E 4 OSIY H 2 29 T N 269 H RS LEE a 5 _ 22222222 S oi azz 22 1 JED me 86 we I 5 XSNSZT 91419 2 O32 I H 08 eae ee ZSLON 00 Ses e L4 2 891 a oa 6291 H Ory He 2221 44 8 i es eS i H 29 20 20 20 20 20 20 20 8 12HA s 42 gt 52525459 191 lt en e 891 B 819 gt 2 01 o 9 e 3030 30 0 20 0 20 POSLON t i f gt gt 5 SOI 8 8 8 1 2 S 39 en Oo sense wre 12 t AWS 9 i Ga M i gt 2 s 2028 20 20 20 me se amp 3 Ler 21 2126 m eS 36 18 4 e STUDIO550 650 810 PC BOARDS 5 PWA F CCD2 340 PWB F CCD2 340 6LA07000000 TOSHIBA TP12 44 23E2251AF 02 167 V TC2 e JUNE 2002 TOSHIBA 18 5 e STUDIO550 650 810 PC BOARDS 6 PWA F LDR 340 TOSH JSHIBA 8i PUB F LDR 846 7 PWA F SNS 340
262. uctive high electric resistance under the light so it is called a photoconductor 2 Main charger The main charger is configured by stretching a charger wire between two insulation blocks provided at both ends of the U shaped metal rod When a high voltage is applied to the charger wire the air around the wire is ionized electrostatically charged and this ionized air is attracted onto the drum s surface This phenomenon is referred to as the corona discharge In the dark the surface of the drum is negatively charged by the corona discharge of the main charger 3 Charger wire cleaner The charger wire cleaner is for removing stain on the charger wire It moves backward and forward to clean the charger wire after the power is turned ON and more than 2000 continuous copies have been made since the door switch was turned ON or the previous cleaning operation 4 Discharge lamp Discharging is a process of reducing or eliminating the electrostatic charges on the drum The discharge lamp has two effects a cleaning effect and pre exposure effect By the cleaning effect it neutralizes and eliminates the residual charges on the drum surface by lowering the electrical resis tance of the photosensitive surface by exposing it to the light and by the pre exposure effect it keeps a fixed drum surface potential before the charging process 5 Ozone filter The ozone filter decomposes ozone with its catalyst by absorbing the ozone w
263. umed automatically STAPLER The copier is ready for scanning and waiting for when the staple cartridge is the operator to select the copying conditions replaced with a new one The finisher unit runs out of the staples READY CHECK Ready for scanning Printing is resumed automatically SADDLE STITCH The copier is ready for scanning and when the staple cartridge is STAPLER waiting for the operator to select the replaced with a new one copying conditions The saddle stitcher unit runs out of the staples READY USE Ready for scanning The display is made to disappear by GENUINE TOSHIBA The copier is ready for scanning and using the toner provided by Toshiba TONER waiting for the operator to select the copying conditions Toner other than Toshiba s has been used ENTER DEPART The copier is waiting for the operator to The copier becomes ready to start MENT CODE enter the department code copying when the correct depart Displayed when the department manage ment code is entered ment function has been used READY ADD Ready for scanning Printing is resumed when the INSERTER PAPER The copier is ready for scanning and START key is pressed under the waiting for the operator to select the condition the printing UT is displayed copying conditions STATUS key pressed after No inserter paper adding inserter paper READY ADD TAB Ready for scanning Printing is resumed when the START SHEET The copier is ready fo
264. upper guide unit 4 Remove 2 screws and take off the separation unit 5 Remove the clip at the rear side displace the bushing and take off the separation roller from the holder Separation roller JUNE 2002 TOSHIBA TEC 16 75 Clip Bushing e STUDIO550 650 810 RADF 6 Remove the clip and pull out the pulley parallel Pulley Parallel and separation roller from the shaft Separation roller E Motors E 1 Feed motor 1 Open the jam access cover 2 Remove the ADF rear cover 3 Remove 2 screws of the harness cover and slack off the harness 4 Disconnect 1 connector take off the tension spring remove 2 screws and take off the feed SS C Feed motor SH Tension spring motor with the tension bracket 5 Remove 2 screws and release the feed motor from the tension bracket Installing procedure gt 6 After installing the feed motor to the tension bracket move it toward the direction of the white arrow and tack it temporarily to the feed motor bracket with 2 screws 7 Hang the timing belt around the pulley of the feed motor 8 Loosen 2 belt tension screws temporarily and hook the motor ten
265. upply unit 2 Remove 4 screws and take off the tray drive unit 3 Turn over the tray drive unit Then release 6 latches and take off the cover Note Since the spring inside the tray drive unit is forcing the cover to extend be careful when taking off the cover 4 Remove the tray up motor Note Make sure the bosses of the gear fit into the hole of the cover when installing the unit E Feed motor 1 Remove the rear cover 2 Disconnect 1 connector remove 2 screws and take off the feed motor e STUDIO550 650 810 PAPER FEEDING SYSTEM 9 20 N NS 74 ge ON n 6 T v C3 AA xy 52 B 609 Ss gt Ti a motor JUNE 2002 TOSHIBA TEC F Feed drive unit 1 Remove the power supply unit 2 Remove 3 screws and take off the power cable connecting section 3 Remove 6 screws and take off the feed drive unit
266. us Components 2 4 Symbols and Functions of RADF Various Components 2 5 System Block Layout 2 6 Disassembly and Replacement of Covers and PC Boards 2 6 1 Covers 2 6 2 PC boards 2 OUTLINE OF THE MACHINE 2 1 Sectional View A Front side view 15 13 12 10 11 5 4 123 6 7 8 9 O S r 32 E m 23 33 22 34 40 41 NI 24 r1 20 21 E 35 17 25 36 52 43 54 55 53 44 37 99 38 45 58 59 46 61 62 63 65 69 66 67 70 71 JUNE 2002 TOSHIBA 54 e STUDIO550 650 810 OUTLINE OF THE MACHINE lamp Reflector Mirror 1 Mirror 2 Mirror 3 Original glass Lens NID BR NM CCD driving PC board Scanner control PC
267. ve SSBS SO SB SNS Detecting original at the small original Semiconductive Small original reverse sensor TRY VR Detecting the original width on the tray Rotary volume Tray width sensor LO EX SNS Detecting original at the large original Semiconductive B E j JJ 52 Large original exit sensor exit photosensor P85 115 JUNE 2002 TOSHIBA TEC 2 25 e STUDIO550 650 810 OUTLINE OF THE MACHINE a 2 geq ce OYE SAS 1 VMd 1 195 di gt NdOW eus NVHAN lt gt JOMIN Aud gt gt OUBARE J use ag gt 497 2 use w 4 ee wus gt 21 lt 401 lt gt nvus Nd9 1 2 5 5 4 0 991 1 vMd E Josuag gt 5 U 19527 2 ejeg obeu 5 A UJ o O E NOS 1 VMd OOO C 000 CO OISV 26 oo Ov HQ T H VMd Peg soan gt 2 gt 0 000 yun Jose 0 e cQ99 1 vMd 3 3dl OISV eje he gt ON fo sng M
268. ve the exit roller to the near side and install 2 O rings to the grooves of the exit roller Note O ring Refer to the parts list for the parts number and so on e STUDIO550 650 810 EXIT REVERSE SECTION 15 8 JUNE 2002 TOSHIBA TEC 16 REVERSING AUTOMATIC DOCUMENT FEEDER RADF 16 1 General Description 16 2 Construction 16 3 Drive System 16 4 Signal Diagram 16 5 Operations 16 5 1 4 single sided feeding Operational condition A4 paper Rreproduction ratio 100 16 5 2 A4 double sided feeding Operational condition A4 paper Reproduction ratio 100 16 5 3 A3 single sided feeding Operational condition paper Reproduction ratio 100 16 5 4 double sided feeding Operational condition paper Reproduction ratio 100 16 5 5 Single sided feeding at mixed original mode Operational condition A4 R and FOLIO papers Reproduction ratio 100 16 6 Jams 16 6 1 Jams at feeding section 16 6 2 Jams at transporting section 16 6 3 Jams at large original exit section 16 6 4 Jams at small original reverse section 16 6 5 Jams at small original exit section 16 6 6 Jams at intermediate transport section 16 7 Erros 16 8 Original Size Detection 16 8 1 Original size detection method 16 8 2 Original size detection chart 16 9 Flow Chart 16 10 Timing Chart 16 11 Circuits 16 12 Input Output Signals 16 13 Disassembly and Replacement 16 RE
269. vered to the market e STUDIO550 650 810 PROCESS RELATED SECTION 10 4 JUNE 2002 J347 2 HVTVR O Transfer J347 8 HVDVR D A O Developer converter LL J347 5 HVMVR SE Gate array IC18 IC56 Main CPU BC RAM IC58 IC27 JUNE 2002 TOSHIBA TEC 10 5 e STUDIO550 650 810 PROCESS RELATED SECTION 10 5 Surface Potential Sensor 10 5 1 General description The surface potential sensor detects the surface potential of the photoconductive drum and controls it to keep constant 10 5 2 Construction The surface potential is controlled by the following construction Surface potential sensor Detecting the surface potential of the photoconductive drum Control section Controlling to keep the surface potential constant High voltage transformer Supplying voltage to the main charger grid PWA F LGC 340 341 342 Main charger grid Control Surface potential sensor voltage High voltage Signal D A converter Main CPU transformer IC18 58 BC RAM 27 conductive 10 5 3 Control method 1 Surface potential correction control The adjusted output value of the main grid voltage in the BC RAM is output to the main CPU Then control voltage data is output to the D A converter from the main CPU through the gate array The data is converted into the analog data by the D A converter and then amplified The control voltage of the main output is output to
270. zation Initialization started Feed motor reverse rotation Read motor forward rotation Large original exit motor reverse rotation Small original exit motor forward rotation For paper no removal detection specified time passed Original found on the transporting path YES NO Paper no removal detection Initialization completed Jam e STUDIO550 650 810 RADF 16 44 JUNE 2002 TOSHIBA TEC 5 Control for separation Control Separation started Lifting tray up Lifting tray up completed YES Feed motor forward rotation Original length sensor ON 5 Lifting tray down JUNE 2002 TOSHIBA TEC Registration sensor ON Feed motor stopped Registration sensor OFF m Feed motor forward rotation 16 45 From original length sensor NO specified pulse passed YES Registration sensor ON 5 Specified pulse passed am Feed motor stopped Pre feeding control from registration roller started Pre feeding trailing edge control started Control f 6eparation completed e STUDIO550 650 810 RADF 6 Control for pre feeding from registration roller Control for pre feeding from Control for pre feeding from registration roller started the ist roller started Read sensor ON Feed acceptable YES YES Se Specified pulse passed Feed motor reverse rotation

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