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Toshiba e-STUDIO 550, Service Manual

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Toshiba e-STUDIO 550 Service Manual Download Page 155

e-STUDIO550/650/810  PROCESS RELATED SECTION

10 - 6

JUNE 2002 © TOSHIBA TEC

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

IC58

IC27

IC56

IC18

Main charger grid

Surface potential sensor

   Photo-

conductive

    drum

High-voltage

 transformer

Control

voltage

 signal

D/A converter

Gate

array

Main CPU

BC-RAM

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 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.

If 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.





Summary of Contents for e-STUDIO 550

Page 1: ...SERVICE MANUAL e STUDIO550 650 810 DIGITAL PLAIN PAPER COPIER File No 31100202 DP 5510 6510 8110 2002 06 ...

Page 2: ...Copyright 2002 TOSHIBA TEC CORPORATION ...

Page 3: ...easily accessible 2 Service of Machines Basically be sure to turn the main switch off and unplug the power cord during service Be sure not to touch high temperature sections such as the exposure lamp the fuser unit the damp heater and their periphery Be sure not to touch high voltage sections such as the chargers high voltage transformer exposure lamp control inverter inverter for the LCD backligh...

Page 4: ...um batteries it is recommended to follow the relevant local regulations or rules 6 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 7 Basically the machine should not be operated with any parts r...

Page 5: ...1 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 1 Specifications 1 2 Accessories 1 3 Options 1 4 Supplies 1 5 System List ...

Page 6: ...r pasted sheet and stapled sheet Maximum size A3 LD Copy speed e STUDIO650 Paper size Size specified Size not specified Bypass feeding Paper supply Tandem LCF A4 LT B5 Topsidedischarging 65 65 48 33 Backsidedischarging 65 65 48 33 A4 R B5 R Topsidedischarging 50 42 33 A5 R LT R ST R Backsidedischarging 48 42 33 B4 LG Topsidedischarging 43 37 33 Backsidedischarging 40 37 33 A3 LD Topsidedischarging...

Page 7: ...A4 LT size 1 sheet APS and automatic density are not selected Preset number of sheets 55 65 81 or more Reproduction ratio 100 e STUDIO e STUDIO e STUDIO 550 650 810 Single sided originals 1 set 18 86 16 81 15 96 훹 3 sets 40 17 35 99 30 52 Single sided copies 5 sets 61 92 53 56 45 19 Single sided originals 1 set 21 28 20 70 20 46 훹 3 sets 42 91 39 47 36 37 Double sided copies 5 sets 64 89 57 70 49 ...

Page 8: ...r stack height 55 mm equivalent to 550 sheets 64 to 80 g m2 17 to 22 lb Bond LCF Paper stack height 137 mm equivalent to 2500 sheets 64 to 80 g m2 17 to 22 lb Bond Bypass feeding Paper stack height 11 mm equivalent to 100 sheets 64 to 80 g m2 17 to 22 lb Bond Capacity of originals in the automatic document feeder A3 A5 R LD ST R 100 sheets Automatic duplexer Stackless Switchback type Toner supplyi...

Page 9: ...s Weight Approx 200kg 441lb Power requirements AC 115V 15A AC 220 240V 10A 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 Total counter Electronic counter Dimensions of the copier See the figure below W698x D778 x H1207 mm 1207 mm 698 mm 778 mm ...

Page 10: ... for MJD PM sticker 1 pc for MJD Setup report 1 set for NAD and MJD Customer satisfaction card 1 pc for MJD Operator s Manual pocket 1 pc Power cable 1 pc for ASD AUD and MJD Warranty sheet 1 pc for NAD Drum 1 pc Drum cover 1 pc Original feeding tray 1 pc Tab paper end guide 1 pc Machine version NAD North America MJD Europe AUD Australia ASD Asia ...

Page 11: ...dge 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 Damp heater kit MF 6510U E Printer controller GL 1020 Printer board GA 1140 1 4 Supplies 1 3 Options Drum OD 6510 Developer material D 6510 Toner PS ZT6510 PS ZT6510 PS ZT 6510D Toner bag PS TB6510 PS TB6510E ...

Page 12: ...TIONS Finisher MJ 1017 Staple cartridge STAPLE 600 Staple cartridge STAPLE 700 Finisher MJ 1018 Hole punch unit MJ 6003 Inserter MJ 7001 Printer controller GL 1020 Printer board GA 1140 Key counter socke t MU 10 Key counter MU 8 LCF MP 4003 1 5 System List ...

Page 13: ...View 2 2 Electric Parts Layout 2 3 Symbols and Functions of Various 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 ...

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

Page 15: ...eb pushing roller 34 Fuser roller 35 Separation finger 36 Fuser exit roller 37 Pressure roller 38 Cleaning roller metal 39 Cleaning roller felt 40 Fuser roller thermistor 41 Thermostat 42 Pressure roller thermistor 43 Exit roller 44 Reverse exit switching gate 45 Reverse path roller 1 46 Reverse path roller 2 47 Transfer roller 1 48 Transfer roller 2 49 Transfer roller 3 50 Transfer roller 4 51 Re...

Page 16: ...JUNE 2002 TOSHIBA TEC 2 3 e STUDIO550 650 810 OUTLINE OF THE MACHINE 1 2 3 4 6 5 7 8 9 10 11 12 13 B Rear side view Drive system ...

Page 17: ... 2 4 JUNE 2002 TOSHIBA TEC 1 Scanner motor 2 Drive pulley 3 Drive belt 4 Driven pulley 5 Drum motor 6 Developer unit motor 7 Registration motor 8 Fuser motor 9 Web motor 10 Exit motor 11 Reverse motor 12 LCF tray up motor 13 LCF end fence motor ...

Page 18: ... TEC 2 5 e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 2 Electric Parts Layout A Unit construction Transfer Transport unit Copier unit Fuser unit Rear side Laser unit Scanner unit Reversing automatic document feeder unit ...

Page 19: ...0 OUTLINE OF THE MACHINE 2 6 JUNE 2002 TOSHIBA TEC B Scanner unit B 1 Motor Exposure lamp B 2 Sensor Switch S1 4 S1 4 S2 S1 4 S1 4 Rear side EXP M31 M1 Rear side A4 series LT series S1 5 S1 5 S1 5 S2 S1 5 S1 5 Rear side ...

Page 20: ...JUNE 2002 TOSHIBA TEC 2 7 e STUDIO550 650 810 OUTLINE OF THE MACHINE B 3 PC board B 4 Other parts SLG INV CCD Rear side THMO4 DHL DHR Rear side ...

Page 21: ...e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 8 JUNE 2002 TOSHIBA TEC C Laser unit D Transfer Transport unit Rear side CLT3 CLT1 CLT2 S3 S5 S4 DHT THMO3 FUSE Rear side GLV M2 LDR1 LDR2 SNS PLG ...

Page 22: ...JUNE 2002 TOSHIBA TEC 2 9 e STUDIO550 650 810 OUTLINE OF THE MACHINE E Fuser unit M3 THMO2 THMO1 THM1 THM2 THM3 IHCOIL IH S7 M30 S6 THM5 Rear side ...

Page 23: ...UDIO550 650 810 OUTLINE OF THE MACHINE 2 10 JUNE 2002 TOSHIBA TEC F Copier unit F 1 Motor Fan M20 M18 M17 M28 M24 M11 M13 M23 M25 M26 M27 M29 M16 M19 M22 M21 M12 M14 M15 M5 M6 M4 M10 M9 M8 M7 M32 Rear side ...

Page 24: ...JUNE 2002 TOSHIBA TEC 2 11 e STUDIO550 650 810 OUTLINE OF THE MACHINE F 2 Clutch Solenoid CLT4 SOL2 SOL1 CLT10 CLT8 CLT6 CLT5 SOL3 CLT7 CLT11 CLT9 SOL4 SOL5 Rear side ...

Page 25: ...HE MACHINE 2 12 JUNE 2002 TOSHIBA TEC F 3 Sensor Switch S20 S15 S14 S28 S25 S26 S29 S12 S10 S11 S27 S13 S19 S24 S23 S21 S36 S30 S43 S22 S34 S32 S35 S33 S40 S38 S41 S39 S18 S16 S17 S44 S46 S45 S47 S31 S37 S42 S51 S50 S49 S52 Rear side ...

Page 26: ...JUNE 2002 TOSHIBA TEC 2 13 e STUDIO550 650 810 OUTLINE OF THE MACHINE F 4 PC board LGC HVT MOT2 MOT SYS HDD Rear side ...

Page 27: ...e STUDIO550 650 810 OUTLINE OF THE MACHINE 2 14 JUNE 2002 TOSHIBA TEC F 5 Other parts S48 S9 S8 PS THM4 ERS BRK1 NF1 Rear side ...

Page 28: ...UDIO550 650 810 OUTLINE OF THE MACHINE SSOL RSOL LSOL SMOT LMOT TLMOT FMOT RMOT TRYS DFOPSW READS APS DLMTS COPS EMPS LOES SIZE3 REGS SOES SSBS TRVR COPSW a b c DFOPEN SIZE2 SIZE1 ITFS LNGS LLMTS G Reversing automatic document feeder ...

Page 29: ...g of the drum 39 18 F 1 Drum motor M10 TRB CAM MOT Contact Release of the transfer belt 18 7 F 1 Transfer belt cam motor M11 REV MOT Driving of the reverse section 13 5 F 1 Reverse motor M12 USTNR AUG MOT Recovery of the toner scraped with 45 2 F 1 Used toner transport motor the transfer belt cleaning blade M13 EXIT MOT Driving of the exit roller 13 25 F 1 Exit motor M14 FUSER MOT Driving of the f...

Page 30: ...out fan motor M26 LSU FAN MOT Cooling down of the laser unit 31 7 F 1 Laser unit fan motor M27 DUCT IN FAN MOT Cooling down of the copier inside 40 25 F 1 Duct in fan motor M28 SYS FAN MOT Cooling down of the copier inside 52 24 F 1 System fan motor M29 DEV FAN MOT Sucking of the toner in the developer 40 13 F 1 Developer unit fan motor unit M30 IH FAN MOT Cooling down of the IH board 24 17 E IH f...

Page 31: ...ction at the exit section 15 25 F 3 Exit sensor S11 RVS SNR Paper detection at the reverse section 15 14 F 3 Reverse sensor 1 S12 RVS SNR Paper detection at the reverse section 15 14 F 3 Reverse sensor 2 S13 EXIT COV SW Cover open close detection at the 15 11 F 3 Exit cover switch exit cover S14 DEV SW Detection of the developer unit 5 16 F 3 Developer unit switch presence or absence S15 TNR SW To...

Page 32: ...F 3 2nd cassette transport sensor S33 CST2 TRY SNR 2nd cassette tray position detection 7 18 F 3 2nd cassette tray up sensor S34 CST2 FED SNR 2nd cassette paper detection 7 18 F 3 2nd cassette feed sensor S35 CST2 EMP SNR Detection of 2nd cassette paper 7 18 F 3 2nd cassette empty sensor presence or absence S36 CST2 BTM SNR 2nd cassette position lower limit 7 18 F 3 2nd cassette bottom sensor dete...

Page 33: ...at the standby side S48 HTR SW Detection of the fuser unit presence 24 7 F 5 Fuser unit switch or absence S49 SFB COV SNR Open close detection of the bypass 28 7 F 3 Bypass feed unit cover sensor feed unit cover S50 SFB FED SNR Paper detection at the bypass feeding 10 23 F 3 Bypass sensor S51 SFB SIZE SNR Paper size detection at the bypass 12 9 F 3 Bypass paper size detection sensor feed width det...

Page 34: ...cassette pickup roller 7 26 F 2 2nd cassette feed clutch CLT10 LCF TR CLT Tandem LCF paper transporting 7 26 F 2 Tandem LCF transport clutch CLT11 LCF FED CLT Driving of the tandem LCF pickup 7 26 F 2 Tandem LCF feed clutch roller Symbol Name Function P I Remarks 4 PC boards SLG PWA F SLG Control of the scanning section and 36 1 B 3 Scanning section control PC board SLG board image processing CCD ...

Page 35: ...19 F 4 Motor driving PC board 2 PLG PWA F PLG Control of the printing section and 31 16 C Laser control PC board PLG board image processing Symbol Name Function P I Remarks Symbol Name Function P I Remarks HVT PS HVT Generating of the voltages for the 51 19 F 4 High voltage transformer followings main charger wire main charger grid developer bias drum cleaning brush 7 Transformer Symbol Name Funct...

Page 36: ...at over heating in scanner section THM1 THMS S HTR Detection of the surface temperature 26 6 E Fuser roller side thermistor front at the drum edges Abnormal detection THM2 THMS HTR Detection of the surface temperature 26 6 E Fuser roller center thermistor at the drum center THM3 THMS S HTR Detection of the surface temperature 26 6 E Fuser roller side thermistor rear at the drum edges THM4 THMS DRM...

Page 37: ...r Feed motor and registration roller P86 I19 LMOT LMOT Driving of the large original exit roller Stepping motor Large original exit motor and large original reverse roller P87 I13 Symbol Name Function Remarks 2 Solenoids Symbol Name Function Remarks ESSOL ESSOL Disengagement of the large original DC solenoid Disengagement solenoid exit roller P89 I4 LSOL LSOL Switching of the large original exit D...

Page 38: ...sensor P91 I103 SIZES3 SIZE SNS3 Detecting the original width Semiconductive Original width sensor 3 photosensor P91 I103 REGS REG SNS Detecting original at the registering Semiconductive Registration sensor section photosensor P91 I103 TRYS TRY SNS Detecting the original length on the tray Semiconductive Tray sensor photosensor P93 I102 LLMTS LO LMT SNS Detecting the lower limit of the lifting tr...

Page 39: ...A L CPU D A SRAM ADR DAT Bus Galvano DRV ASIC Galvanic Mirror Laser Unit Laser Beam Sensor PWA F LDR 340 LD Image Data ASIC ASIC PWA F LDR 340 LD ASIC SRAM Flash ROM ADR DAT Bus PWA F SYS 340 or PCI Bus Image Data Image Data ASIC HDD PWA F SCN 340 SDRAM CPU SRAM Flash ROM IDE I F Download JIG ASIC Printer Board Printer Controller Local Bus RTC NVRAM SDRAM 32 32 32 32 32 16 4 8 32 16 32 16 32 Flash...

Page 40: ...take off the feed side rear cover 2 Remove 2 screws and take off the feed side top cover 3 Open the bypass unit tray and remove 2 screws Then remove 6 screws and take off the feed side center cover C Exit side top cover Exit side rear cover Exit side bottom cover 1 Remove 2 screws and take off the exit side top cover 2 Remove 1 screw and take off the exit side rear cover 3 Remove 6 screws and take...

Page 41: ...r cover 1 Loosen 1 screw shown by a white arrow remove 6 screws release 2 hooks and take off the rear cover E Right top cover 1 Remove 1 screw and take off the right top cover F Left top cover 1 Remove 1 screw and take off the left top cover Left top cover Right top cover Hook ...

Page 42: ...r exit side inner cover plate cover Rear feed side inner cover Rear exit side inner 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 B High voltage transform...

Page 43: ... and LGC board with the bracket 2 Remove 4 screws and take off the bracket of the power supply unit 5 Disconnect 6 connectors remove 1 screw release 3 lock supports and take off the high voltage transformer 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 LGC board High voltage transformer...

Page 44: ...3 COPY PROCESS 3 1 General Description 3 2 Details of Copy Process 3 3 Comparison of Copy Process to 6570 5570 ...

Page 45: ...onductive drum onto a paper Separation Separates the paper from the drum together with the toner 훹 7 Fusing Fuses the toner on the paper by applying heat and pressure 훹 8 Fur brush cleaning Cleans dirt and paper dust on the drum 훹 9 Blade cleaning Forcibly removes the residual toner on the drum 훹 10 Discharging Discharges any remaining negative charge on the drum 2 3 1 9 4 5 8 7 6 10 Image process...

Page 46: ...black areas of the original is eliminated while the areas of the drum corresponding to white areas remains the negative charge As this image 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...

Page 47: ...tion 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 to the light Semiconductor laser element converts image sig nals sent from the image processing section into optical signals laser emissio...

Page 48: ...lower than the developer bias which is applied to the magnetic roller reverse development method Photoconductive layer The potential of the drum being higher than the developer bias The potential of the drum being lower than the developer bias Carrier always attracted onto the magnet White background Half tone Solid Drum Magnetic roller 0 100V 200V 300V 400V 700V 500V 600V White background Image n...

Page 49: ... a long time be yond its normal life span the toner is caked onto the carrier 훹 The carrier s charging performance is lowered Symptom 1 Image density is decreased 2 Toner scattering occurs 3 Background fogging occurs Solution Replace new developer material Toner Carrier No frictional electrification on the area where the toner is caked on Magnetic roller Magnetic brush development The south and no...

Page 50: ...f originals 3 The 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 A B C A 20 000 30 000 40 000 50 000 ...

Page 51: ...nto 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 acting b...

Page 52: ...essure roller Fusing The toner is fixed on the paper Fuser roller Paper Pressure IH coil Fuser roller Paper movement Pressure Separation finger Pressure roller 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 flicker scrapes off the toner on the brush Also too pervent the cleaning...

Page 53: ...rge remains on the photoconductive drum Uneven charge is applied to the drum during the next copy 훹 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 훹 The photoconductive drum becomes electrically conductive 훹 All the charges remaining on the photoconductive drum are conducted to the grou...

Page 54: ...510 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 Same as 6570 5570 Separation finger applied Same as 6570 5570 9 Discharging 1 Discharging position Discharg...

Page 55: ... Pressure roller Pressure roller PFA tube roller ø60 PFA tube roller ø60 2 Cleaning Fuser roller cleaning roller ø33 Cleaning web for fuser roller cleaning Cleaning felt roller ø27 Pressure roller cleaning felt roller ø28 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 80...

Page 56: ... 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 ...

Page 57: ... 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 2 Pre running operation Pre running operation is started when the temperature of the fuser roller reaches a certain tempe...

Page 58: ... 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 3 Carriage operation Exposure lamp turned ON White shading compensation is carried out Scanning motor turned ON Carriages 1 and 2 start to advance Copier entering ...

Page 59: ... Exit sensor detecting passing of paper trailing edge Main charger developer bias and discharge lamp turned OFF Each operation of drum transfer belt fuser unit and developer unit stopping and each fan returning to standby mode rotation READY displayed and copier entering standby mode ...

Page 60: ...0 1780 260 3240 3330 430 260 4040 2980 2470 Timing chart for copying one A4 sized sheet fed from the 1st cassette Scanner motor Exposure lamp Drum motor 1st cassette feed clutch 1st cassette feed sensor Registration sensor Registration motor MVDEN signal Main charger Developer bias Discharge lamp Exit sensor Forward rotation Reverse rotation ms ...

Page 61: ...g registration roller 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 Interruption lamp turned ON Copying operation temporarily halted and carriages 1 and 2 returning to their home position JOB INTERRUPTED JOB ...

Page 62: ...er 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 훹 Tray...

Page 63: ...clear this 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 Add paper display blinked When the 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...

Page 64: ...riod of time E12 Bypass misfeeding Clear paper symbol 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 When the key copy counter optional is pulled out from the copier which installs it Set key copy counter displayed Copying operation disabled When the counter is pulled out during copying Copying is st...

Page 65: ...t path detecting paper ON Clear paper symbol displayed E03 Front cover opened during copying Clear paper symbol displayed E41 Paper leading 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 Clear paper symbol displayed E20 22 25 30 34 3C When a sheet of paper is fed at reverse section Regi...

Page 66: ...oner supply operation copying can be started B 3 Replace toner bag Toner bag becoming full with used toner Used toner transport auger moving to feed side Toner bag full detection sensor ON Replace toner bag symbol displayed 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 techni...

Page 67: ...4 Flowchart 4 4 1 Power ON to ready YES YES NO A NO NO NO YES YES E03 Main SW ON DC power supply ON Restart Is cover opened IH coil ON Scanner motor ON Cassette tray up motor ON Is registration sensor ON Is exit sensor ON Is transport sensor 1 ON Jam Start initializing ...

Page 68: ... initialization finished Is fuser roller temperature high enough to start pre running Pre runningstarted Is fuser roller temperature high enough to be ready Pre runningfinished Ready Drum motor ON for 6 sec Tonerbagreplacement Have 20sec passed after initialization started Call for service Is thermistor cut down Is heater cut down Is polygonal motor NG used toner full clear operation Is toner full...

Page 69: ...tem control Is polygonal motor ON Laser ON Transfer belt bias ON Transferbeltbias OFF Is H sync OK Laser OFF Process system control finished Intermediate transport clutch ON Intermediate transport clutch OFF Registration motor ON Drum separation finger solenoid ON Drum separation finger solenoid OFF Registration motor OFF Exposure lamp ON Carriege moving forward Carriage stopped Exposure lamp OFF ...

Page 70: ... NO B E02 Paper jam Is fuser unit exit sensor ON 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 Drum reversed Standby ...

Page 71: ...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 Operation 5 4 1 Dot matrix LCD circuit 5 4 2 LED display circuit 5 5 Disassembly and Replacement ...

Page 72: ... 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 Control Panel ExteriorView ...

Page 73: ...e STUDIO550 650 810 CONTROL PANEL 5 2 JUNE 2002 TOSHIBA TEC 5 2 Items Shown on Display Panel Fig 5 2 1 Fig 5 2 2 C A K I H E J B F D E G ...

Page 74: ... Ready for scanning The copier is ready for scanning and waiting fortheoperatortoselectthecopyingconditions Paper in the cassette has run out during printing Ready for scanning The copier is ready for scanning and waiting fortheoperatortoselectthecopyingconditions The finisher is full of paper Ready for scanning The copier is ready for scanning and waiting for operator to select the copying condit...

Page 75: ...oshiba s has been used The copier is waiting for the operator to enter the department code Displayed when the department manage ment function has been used Ready for scanning The copier is ready for scanning and waiting for the operator to select the copying conditions No inserter paper Ready for scanning The copier is ready for scanning and waiting for the operator to select the copying condition...

Page 76: ...ming in RADF Paper jam in the finisher Fig 5 2 2 H Paper jam in the inserter Fig 5 2 2 I Motors sensors switches etc do not work properly Fig 5 2 2 J PM cycle Time for maintenance Copying is possible Paper misloading in the tandem LCF Displayed when a paper is set out of alignment Toner bag full The toner bag is full of used toner The copier stops its operation Fig 5 2 2 K Displayed when the paper...

Page 77: ...e START key is pressed without papers on the tray Displayed when the tab paper mode is valid and the tab cassette is not selected Displayed when the paper is OHP and duplex printing is carried out Displayed during inputting the form combination original Displayed when the fuser unit cleaning web gets decreased This message is set not to be displayed at shipment but the setting can be changed at th...

Page 78: ...S STOP State of copier key key keys selection key key feeding panel key key key Scanner warming up Printer warming up Ready for copying Printing Scanning Paper run out Toner empty Key copy counter not inserted optional Paper misfeed in bypass copying Paper jammed inside the machine Service call indicated Ready for interrupt copying In energy saver mode Power OFF Manual operating Operation enabled ...

Page 79: ...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 type CFL backlight STN SuperTwisted Nematic 2 Block diagram 320 x 240 IC1 IC5 XSCL UD0 UD1 UD2 UD3 WF LP VDD GND V0 VEE Power supply LCDEN IC6 IC7 IC2 LCD PANEL 320 x 240 DOTS IC3 IC4 80 80 80 80 80 80 80 ...

Page 80: ...message to the System CPU c The System CPU writes the data to be 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 PROM CPU R A M LED LED LCD KEY CPU PWA F DSP 300 PWA F SYS 300 GA LCD System a b c c d d LOAD FRAME LOAD 240 1 2 240 CP x 320 4 pulses 1 2 240 1 tF 1 tF 1 2 FRAME D0 D3 CP controller driver PWA F SYS 340 ...

Page 81: ...The transistor is turned ON when the LDON 0 signal becomes L level Also when IC8 17pin D7 changes to L the current flows from 5VL via the transistor to LED4 COPY to turn ON LED4 COPY Current Conditions to turn ON the LED a The transistor Q3 connected to the LED anode is ON b The output from the cathode side of the LED is L level The LED is turned ON when a and b are satisfied ...

Page 82: ...ve 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 Control panel bottom cover Connector Clamp Connector Connector Connector Connector DSP board 4 Remove 10 screws disconnect 2 connectors and release the braket after disconnecting 1 connector at the counter 5 Disconnect 7 connectors re...

Page 83: ...0 810 CONTROL PANEL 5 12 JUNE 2002 TOSHIBA TEC 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 SKEY board LCD panel ...

Page 84: ...ntrol for Exposure Lamp 6 4 1 General description 6 4 2 Exposure lamp 6 4 3 Control circuit for exposure lamp 6 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 ...

Page 85: ...D 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 Rail for carriage 1 Original glass R...

Page 86: ...mp 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...

Page 87: ...lf of carriage 1 4 Lens unit The light reflected from mirror 3 is 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...

Page 88: ...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 b Scanning original on RADF Carriage 1 stays at the shading position during the shading correction and at the scanning position during the scanning operat...

Page 89: ... the stepping motor driver STK672 080 IC4 15 14 13 12 11 10 9 8 6 7 ENABLE Mol RESET M3 CLOCK CWB M2 M1 Vcc2 Vref A AB B BB PG SUB 5 4 3 2 1 Excitation mode setting Switching pulse ON OFF detection Excitation status monitor CR oscillation Phase counter Generation of reference clock PWM control Generation of phase excitation signal Generation of pseudo sine wave Switching current fraction ratio ...

Page 90: ...d after the rising and falling edge of the pulse of SCNCLK 0 H Normal operation The motor has been excited L Excitation drive output is forcibly shut OFF the motor has not been excited Motor wire current value is set in the range of 0 to 2 25 A phase by applying the analog voltage 0 to 5 V Sets the excitation mode Note Do not change the setting wihin 5µs before and after the rising and falling edg...

Page 91: ...l 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 PWA CCD PWA CCD Image processing circuit A D PWA SLG Main CPU IC37...

Page 92: ...he 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 1 Electrode 2 Electron...

Page 93: ... SLG 340 EXPON 0 WDTOUT 0 WDTEN 0 P23 IC9 WDTOUT HC14 IC17 D1 1SS184 Q3 RN2401 Q2 RN1401 SG Working conditions WDTOUT 0 WDTEN 0 EXPON 0 5VSW Q2 Xenon lamp State of copier Lamp drive signal H H H ON OFF OFF Normal operation H H L ON ON ON L X X OFF OFF OFF Scanner CPU overdriving H L X OFF OFF OFF Call for Service Scanner CPU Xenon lamp Xenon lamp lighting device ...

Page 94: ...er elements are separated and output in parallel via two channels 6 5 2 Shading correction Signal voltages read by the CCD have the following characteristics 1 Light source has 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 ...

Page 95: ... by checking which phototransistors are turned on or are not 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 instant...

Page 96: ... 650 810 SCANNING SECTION 6 12 JUNE 2002 TOSHIBA TEC A4 Series LT Series Fig 6 6 3 Sensor detection points ST LT LG LD ST R LT R APS 5 APS 4 APS 2 APS 3 A5 B5 A4 B4 A3 A5 R A4 R B5 R APS 5 APS 1 APS 2 APS 3 APS 4 ...

Page 97: ...ined 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 outpu...

Page 98: ... modulation to detect an original The light emitting diode is driven by a pulse having a 130 µsec cycle and an 8 µsec ON time When the phototransistor receives the same signal as this pulse it is determined that there is an original The pulse modulation is performed inside the reflection type phototransistor About reflection type photosensor 130µsec LED 8µsec Original Phototransistor ...

Page 99: ...Remove the original glass 2 Remove 9 screws and take off the lens cover Disconnect 1 connector of APS sensor at this time C 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 Glass retainer Lens cover APS sensor 3 Remove the lens cover 4 Remove 2 screws and take off the APS senso...

Page 100: ...G fan motor 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 E Exposure lamp 1 Move the carriages toward the exit side disconnect 1 connector of the exposure lamp and remove 1 screw APS sens...

Page 101: ...and lens cover 2 Disconnect 7 connectors remove 4 screws and take off the SLG board G 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 Lens...

Page 102: ...he wire Wire holder jig Tension spring 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 the 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 Carriage 1 Connector Clam...

Page 103: ...f 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 off the carriage home position sens...

Page 104: ...ircuit 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 ...

Page 105: ...n processing ASIC SLG board PWA F SLG 340 1 PLG board 1 PWA F PLG 340 Image processing writing control section PLG Image processing section Photo conductive drum System control section SYS Image processing section SLG Scanning section Original Original glass Scanning section CCD Semi conductive laser element Laser drive board LDR Writing section Polygonal motor High quality image processing image ...

Page 106: ...n 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 ...

Page 107: ...g Editing processing Gamma correction Gradation processing External output system interface SLG board PWA F SLG 340 SYS board PWA F SYS 340 Sorting group copy magazine sorting 2in1 4in1 single sided double sided image composi tion date insertion sheet insertion mode etc PLG board PWA F PLG 340 Image processing ASIC for printer sction Smoothing processing External input system interface Image area ...

Page 108: ...ons 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 th...

Page 109: ...ove 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 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 anot...

Page 110: ...ing 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 1 100 200 2 3 4 5 6 7 8 9 10 1 1 2 2 3 3 4 4 5...

Page 111: ...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 SY...

Page 112: ...cal 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 Setti...

Page 113: ...8 LASER OPTICAL UNIT 8 1 General Description 8 2 Structure 8 3 Laser Diode 8 4 Disassembly and Replacement ...

Page 114: ...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 diode on the laser driver board and it is rediated on the drum through the optical elements such as cylinder lenses polygonal mirror and fØ lens This unit must not be disassembled in the field since it is finely adjusted and very sensitive to du...

Page 115: ...te focus lens 2nd laser drive PC board 2nd laser diode Finite focus lens Half mirror Galvanic mirror Cylinder lens Polygonal motor H Sync detection PC board 1st laser drive PC board Front side H Sync turnup mirror 1st turnup mirror 2nd turnup mirror Slit glass Laser light exit Front side Rear side Laser optical unit overview ...

Page 116: ...ls 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 danger of laser leakage dur...

Page 117: ...e 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 no...

Page 118: ...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 c Sectional shape of laser beam The shape of the laser beam spotted on the drum is adjusted Wider Narrower Drum Lens 1 Lens 2 Same intervals Mirror plane is tilted 4 H Sync detection PC board The laser light which is started to be scanned fro...

Page 119: ...ing functions a APC control function adjusts disparity of the laser intensity caused 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 ...

Page 120: ...nductive 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 reaches or becomes greater than the threshold current and outputs...

Page 121: ...it fixing stay 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 3 Disconnect 1 connector and remove 2 screws to take off the laser fan motor Laser fan motor Connecotor ...

Page 122: ...e the original glass and lens cover Chap 6 2 Loosen 2 laser unit setscrews 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 ...

Page 123: ...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 ...

Page 124: ...porting state of the paper 9 2 Functions Paper feeding system sectional view Front side No Name No Name 1 Bypass pickup roller 9 Cassette pickup roller 2 Bypass feed roller 10 Cassette feed roller 3 Bypass separation roller 11 Cassette separation roller 4 Bypass transport roller 12 Cassette feed sensor 5 Registration roller metal 13 Cassette transport sensor 6 Registration roller rubber 14 Interme...

Page 125: ...tion roller 5 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...

Page 126: ...O550 650 810 PAPER FEEDING SYSTEM 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 ...

Page 127: ...ught up by the spring force The 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 ...

Page 128: ... while the upper sheet is transported by the feed roller in the direction of the arrow 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 registration roller When two sheets enter between the rollers at the s...

Page 129: ...y 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 C Bypass feeding The bypass sensor detects the availability of paper The bypass feed clutch ...

Page 130: ...tray bottom sensor and the tandem LCF tray up motor 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 reve...

Page 131: ...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...

Page 132: ...ere is no paper and the corresponding message is displayed on the control panel 3 When the end fence stop 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 hom...

Page 133: ...am of TA8428 1 2 3 4 5 6 7 IN1 IN2 M GND M N C VCC IN1 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 Input Output IN1 IN2 M M Remarks H H L L BRAKE L H L H CW H L H L CCW L L OFF high impedance STOP Control logic Thermal shut down over current protec tio...

Page 134: ... cover 2 Open the feed side center cover and 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 Connector ...

Page 135: ... JUNE 2002 TOSHIBA TEC 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 10 Remove 1 clip and take off the separation roller Clip Feed roller Separation roller Clip ...

Page 136: ...tor remove 1 screw and take off the transport sensor Note Make sure to put on the spring properly after replacing the sensors Spring Spring A 2 Empty sensor Tray up sensor Transport sensor 1 Disconnect 1 connector and take off the empty tray up sensors Connector Empty sensor Tray up sensor ...

Page 137: ...ws and take off 2 brackets and 2 guides 2 Disconnect 1 connector remove 1 E ring for each clutch and take off the feed and transport clutches 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 4 Remove 1...

Page 138: ...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 Connector E ring E ring REAR FRONT ...

Page 139: ...t part of shaft C Bypass feed unit 1 Remove the bypass feed unit 2 Remove 1 clip and 1 bushing and displace the bypass transport roller Clip 3 Remove 2 clips and 1 bushing and take off the pickup feed roller unit 4 Remove 3 clips and take off the pickup roller 5 Remove 3 clips and take off the feed roller Notes 1 When installing the rollers be careful not to use the bushing of a wrong material 2 I...

Page 140: ... connector and remove 2 screws to take off 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 Spring 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 Bosses 7 Remove 5 screws disconnect 1 connector and take off...

Page 141: ...emove 3 screws release 4 latches and take off the bypass tray upper cover 11 Remove 2 screws for each bracket and release 2 fixing brackets Then take off the bypass tray Latch Latch Bypass tray upper cover Fixing bracket 10 Remove 1 clip displace the shaft and take off the separation roller Separation roller Clip ...

Page 142: ...on to the following things when setting up the bypass feed roller and pickup roller 1 Put the clip in the groove of the shaft completely 2 Make sure there is no adhesion of oil and such on the timing belt pulley and roller 3 Be careful not to install the bypass pickup roller and feed roller in a wrong direction 4 Install the feed roller for the one way clutch to come to the rear side Feeding direc...

Page 143: ...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 Boss Tray up motor 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 ...

Page 144: ...A TEC 9 21 e STUDIO550 650 810 PAPER FEEDING SYSTEM 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 ...

Page 145: ... 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 Paper size marking A4 LT LT A4 Paper size marking ...

Page 146: ...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 th...

Page 147: ...ty 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 Remove 1 screw and release the bracket 4 Disconnect the connector 5 Release the latches from the back side of the tandem LCF cassette and take off the end fence home position sensor and standby si...

Page 148: ...racket 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 End fence motor A4 size LT size End fence stop position sensor Bracket Feed side Standby side Connector ...

Page 149: ...harger 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 ...

Page 150: ...rts 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 Main charger Charger wire cleaner Sectional view Discharge lamp Surface patential sensor ...

Page 151: ...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...

Page 152: ...ner reaching the limit rear side Control section Controlling of the cleaner drive unit and cleaning of the wire Front side Rear side Drive unit control signal IC9 IC56 IC58 PWA F LGC 340 341 342 CLMTA 0 CLMTB 0 MCLSW 0 Signal Status CLMTA 0 CLMTB 0 Wire cleaner L level L level OFF drive motor H level L level Reverse rotation Home position limit L level H level Forward rotation Limit Home position ...

Page 153: ... Vc Adjustment mode Main CPU Gate array Digital data Analog data D A conerter 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 The data is converted into the analog data at the D A converter The Vc is output to the Main Transfer and Developer transformer The Main Transfer and Developer tran...

Page 154: ...JUNE 2002 TOSHIBA TEC 10 5 e STUDIO550 650 810 PROCESS RELATED SECTION J347 2 HVTVR J347 8 HVDVR J347 5 HVMVR BC RAM IC58 IC56 IC18 IC27 Gate array D A converter Transfer Developer Main Main CPU ...

Page 155: ...PU BC RAM 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 the h...

Page 156: ...ins the control is carried out following 1 at 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 ...

Page 157: ...de right inner cover toner cartridge drive unit and toner recycle unit Chap 12 6 2 Remove 1 screw and pull out the main charger Main charger Main charger grid Terminal cover 3 Push the button to release the tension of the main charger grid and take off the grid 5 Release 2 latches and take off the rear side terminal cover 4 Release 1 latch and take off the front side terminal cover Latch ...

Page 158: ...r unit 2 Disconnect 1 connector remove 1 screw and take off the charger guide Main charger Charger guide Cleaner unit 7 Remove 1 screw and take off the cleaning pad 6 Pull up the terminal release the spring unhook the rear side hook and take off the charger wire Cleaning pad Note When installing the cleaning pad install it so that the charger wire go through the pad side ...

Page 159: ...ector 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 Wire cleaner drive motor 5 Disconnect 2 connectors remove 1 screw and take off the wire cleaner stop position switch Note When installing the switch fix it with pushing it toward the arrow 훽 Also pay attention to the color of the harness when connecting...

Page 160: ...sor 1 Take off the control panel unit Chap 5 5 2 Disconnect 1 connector remove 1 screw and take off the temperature humidity sensor E 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 Temperature humidity sensor Surfave potential sensor Connector ...

Page 161: ...ct 3 connectors and release the harnesses from 4 clamps 3 Unhook the exhaust duct with sliding it toward the front side and pull it out 4 Disconnect 1 connector and pull out the duct 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 Connector Connector Clamp Duct out fan Exit fan ...

Page 162: ...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 ...

Page 163: ...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 Sectional view G16 G15 G25 G17 30 Drive system Drum separation finger Drum cleaning blade Drum cleaning brush Recovered toner transport auger Image quality sensor Drum recovery blade Drum thermistor Drum ...

Page 164: ...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 eliminate...

Page 165: ...r 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 ...

Page 166: ...ge 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 6 Changing of the image formation condition 7 Finish controlling Reflecting the determined image formation condition to the following printing 촞 촞 촞 촞 촞 YES ...

Page 167: ... 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 Image formation process system Charging Laser exposuring Developing CPU Carrying out of the procedure 1 7 described in the previous page Image formation process system Main charger Image quality sensor Drum Laser exposure De...

Page 168: ...r cartridge drive unit toner recycle unit developer unit and main charger 2 Remove 2 screws and pull out the cleaner unit Drum thermistor Connector B Drum thermistor Drum 1 Disconnect 1 connector and remove 1 screw Then take off the drum thermistor with the bracket 2 Turn the cam to release the pressure of the cleaning blade 3 Remove 1 screw and take off the drum shaft 4 Pull out the drum upward D...

Page 169: ...e 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 5 Pull out the cleaning blade with holding each foot of 2 screws ...

Page 170: ...overy blade Notes 1 The recovery blade is attached with a 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 ...

Page 171: ...ake off the cam 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 Connector ...

Page 172: ... hard disk with the bracket 2 Remove 3 screws and take off the drum 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 Drum wheel Drum motor Connector ...

Page 173: ... 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 ...

Page 174: ...ridge 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 Drum Upper developer sleeve Transport sleeve Doctor blade Paddle Mixer unit Auto toner sensor Developer unit sectional view Lower developer sleeve Scattered t...

Page 175: ...e developer material stirred with the mixer unit to the transport sleeveand 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 developer material is absorbed to form the magnetic brush The magnet is fixed so only its ambient sleeve rotat...

Page 176: ...HIBA TEC 12 3 e STUDIO550 650 810 DEVELOPER UNIT 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 ...

Page 177: ...r G23 Idle gear G19 Idle gear G30 16 Front side Scattered toner recovery roller gear G20 Idle gear G20 Front paddle gear G18 16 Mixer gear 1 G45 G24 Idle gear G24 Idle gear G20 Upper developer sleeve gear G17 Lower developer sleeve gear G17 Drive input gear G27 Rear paddle gear G31 Mixer gear 2 G45 Rear side ...

Page 178: ...xer 2 G45 Idle gear G24 Idle gear G20 Lower and upper developer sleeves G17 Mixer 1 G24 G45 Paddle Drive input gear G27 Rear paddle gear G31 Front paddle gear G18 Developer unit Rear side Idle gear G19 Transport sleeve G23 Front side Idle gear G20 Idle gear Scattered toner recovery roller G20 G18 G16 Idle gear G30 G16 Developer unit drive ...

Page 179: ...ng 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 IC56 IC38 TRSM1A 0 TRSM1B 0 New toner supply motor Gate array Motor driver Signal level for motor circuit Signal State TRSM1A 0 TRSM1B 0 L L OFF Level H L CW when supplying toner L H CCW detecting cartridge installation H H Brake ...

Page 180: ... 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 Fu...

Page 181: ...e 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 Signal H level L level DEVCK Reference clock ...

Page 182: ...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 Recycle toner hopper motor Supplying the recycle toner to the developer material 촞 BC RAM IC32 CPU IC6 GA IC27 PWA SYS PWA LGC CPU IC58 95C063F GA IC56 LCA301 IC18 MB88347 TA8428 IC38 TA8428 IC37 Control panel New toner Toner motor A...

Page 183: ...y detection release function Toner empty detection in the toner cartridge New toner supply motor driven 촞 Output of the auto toner sensor not changed 촞 Toner density not changed 촞 Toner empty detected Toner empty release New toner supply motor driven 촞 Toner supplied from the toner cartridge 촞 Output of the auto toner sensor changed 촞 Toner density recovering to its normal value 촞 Toner empty rele...

Page 184: ...in the developer material decreased 촞 Magnetic resistance decreased 촞 Detection output increased 촞 Auto toner output VATS increased When the toner density is high Toner ratio to the carrier in the developer material increased 촞 Magnetic resistance increased 촞 Detection output decreased 촞 Auto toner output VATS decreased ...

Page 185: ...nector 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...

Page 186: ...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 remaining toner in the toner cartridge is decreased B 2 Recycle toner t...

Page 187: ...e developer material with turning the rear side gear Top cover Gear D 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 L shaped shaft Developer unit 4 Put in a new material 5 Turn the rear side gear several times to uniform the material Gear ...

Page 188: ...Remove the developer material 2 Remove 2 screws and take off the doctor blade Note When installing the doctor blade put the both edges of it against the protrusions at the front and rear side frames and tighten up the screws to fix it This procedure makes it unnecessary to adjust the doctor sleeve gap Doctor blade G Auto toner sensor 1 Remove the developer material 2 Remove 2 screws and take off t...

Page 189: ...r 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 Bracket E ring Guide roller Spring E ring Bias connector E ring Spring Gear Bushing 8 Remove the bias plate and spring 9 Remove 2 E rings and take off 2 guide rollers Note When installing the guide roller pay attenti...

Page 190: ...ront 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 Front side plate Scattered toner recovery roller Developer sleeve holder Bearring E ring Gear Parallel pin Developer sleeve holder 7 Take off 2 pole position fixing bu...

Page 191: ...e oil seals that are pressed in 2 rear side shield bushings Procedure for replacing an oil seal Page 12 20 J Transport sleeve 1 Remove 1 screw and take off the rear side pole position fixing bushing Developer sleeve holder Gear Seal Shieled bushing Scraper Pole position fixing bushing 2 Remove the front side gear E ring and bearing and pull out the transport sleeve 3 If necessary replace the oil s...

Page 192: ...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 Page 12 20 L Paddle 1 Remove 1 E ring and take off the rear side gear and parallel pin Gear E ring Mixer nozzle E ring E ring Gear 2 Remove 1 E ring and pull out the re...

Page 193: ...er sleeves 1pc for each 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 Push in a new oil seal parallel to the frame bushing and so on with paying attention to its direction as shown by the rig...

Page 194: ...unit switch 1 Remove the developer unit main charger cleaner unit and control panel bottom cover 2 Disconnect 1 connector remove 1 screw and take off the bracket 3 Disconnect 2 connectors remove 1 screw and take off the developer unit switch O Toner filter unit 1 Remove the feed side rear cover 2 Pull out the toner filter 3 Remove 2 screws and pull out the filter duct 4 Disconnect 1 connector of t...

Page 195: ...13 TRANSFER TRANSPORT UNIT 13 1 General Description 13 2 Operation 13 3 Functions 13 4 Disassembly and Replacement ...

Page 196: ... the transfer belt is lifted and held in contact against the photoconductive drum 쩺 Voltage from the high voltage transformer unit is applied to the transfer belt via the power supply roller 쩻 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...

Page 197: ... 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...

Page 198: ...p 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 be...

Page 199: ...ise and pull out the transfer transport unit Connector 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 off the front side bearing Then remove 4 screws and take off the transfer belt unit Note When installing the transfer belt unit install it as the lever comes under the cam Clip Cam Lever ...

Page 200: ... 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 5 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 ...

Page 201: ...the groove portion of the shaft 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 1 2 c a b 1 2 Cli...

Page 202: ...transport unit remove each unit after removing the fuser and transfer belt units 3 Remove 2 shoulder screws fixed at both sides slide rails 4 Hold the A shaft or B stay section with the left hand and the right slide rail with the right hand 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 car...

Page 203: ...ollowing 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 especially 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 after...

Page 204: ...es 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 H 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 f...

Page 205: ... unit Note When installing the motor rotate it counterclock wise to fix Green board Silver board 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 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...

Page 206: ...guration 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 ...

Page 207: ...ing 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 temperat...

Page 208: ...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 dus...

Page 209: ...gher 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 10 Fuser roller side thermistor front This thermistor cannot be used for the temperature control It detects a temperature abnormality at the ...

Page 210: ...rol circuit Power code Braker Side thermistor front Center thermistor Thermostat Coil Noise filter Fuse AC input Coil output IH power source drive circuit Control circuit including CPU Photocoupler AC line DC line Power supply for photocoupler Electric power setting Error signal IH ON OFF signal Drum thermistor Temperature control circuit Side thermistor rear Fuser roller ...

Page 211: ...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 inside the fuser roller Block diagram of high fequency power supply IH control board IH coil Fusr roller Monitoring input current Monitoring input current Current input Voltage input I F...

Page 212: ...nals are as followed Number Signal Direction Definition J552 1 IH2ON HOST to IH OFF signal when the roller ends are heated abnormally J552 2 5V J552 3 H1PWR1 HOST to IH Electric power setting J552 4 H1PWR2 J552 5 H1PWR3 J552 6 H2PWR1 J552 7 H2PWR2 J552 8 H2PWR3 J553 1 IH1ON HOST to IH ON OFF signal J553 2 SG J553 3 IHDUTY HOST to IH ON duty signal J553 4 IHERR1 HOST to IH Error signal J553 5 IHERR...

Page 213: ...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 co...

Page 214: ...lly 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 4 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 cert...

Page 215: ...e 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 turned ON and either of the error code C41 to C45 is still displayed even thougth the thermistor th...

Page 216: ...vating 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 surfa...

Page 217: ...s are added up In addition to this are added the fluctuations in the supply voltage Signal generation 7 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 The fuser motor rotates at a constant speed locked range state 8 When the HTRML signal changes to H level the fu...

Page 218: ...247 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 MOT Input This signal is the fuser motor ON OFF control signal When the signal changes to L the fuser motor is turned ON Signal level for motor circuit Signal H level L level HTRCK Reference clock 1247 6Hz HTRMT Motor OFF Mot...

Page 219: ...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 Disco...

Page 220: ... 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...

Page 221: ...re is no defect caused by an installing inadequacy 4 Make sure that the cleaning web is not riveled or slacked off 5 Set up the PM support 6S and clear the cleaning web counter After clearing it the web motor automatically rotates for 65 seconds when turning the power ON 6 Turn the power ON and make sure that READY is displayed 7 Finally confirm the fuser unit is in a proper condition same as the ...

Page 222: ...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 4 Pull out the IH coil Note Make sure that the C and S harnesses of the power supply harness comes to the left side when installing the IH coil S C ...

Page 223: ...nit 2 Remove each spring and take off each separation finger F Cleaning roller metal Lower separation finger 1 Remove 2 screws and open the guide 2 Remove the cleaning roller metal 3 Remove each spring and take off each lower separation finger Crank plate Upper separation finger unit Spring Upper separation finger Cleaning roller metal Spring Lower separation finger ...

Page 224: ...ler felt 1 Remove 2 screws and open the entrance lower guide unit 2 Remove the cleaning roller felt Entrance lower guide unit Cleaning roller felt 4 Remove 2 E rings and take off the exit roller H Thermistor Thermostat 1 Loosen 2 pressure screws completely Exit roller E ring ...

Page 225: ...er unit cover rear 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 Remove 2 screws and take off the stay 2 0 2 5mm ...

Page 226: ...move 2 screws and take off the bearing rear 8 Remove 1 C ring front Bearing rear Gear C ring front 4 Remove 2 screws and disconnect 1 connector 5 Remove 1 C ring rear C ring rear Connector 3 Remove 2 screws release 2 harness clamp and take off the bracket with releasing the catching section Harness clamp ...

Page 227: ...on sensor 1 Remove the fuser unit cover front 2 Remove 1 screw and take off the web detection sensor with the bracket J Pressure roller 1 Remove the fuser roller and take off pressure roller 9 Take off the fuser roller covering it with paper and such not to make scars on it ...

Page 228: ...15 EXIT REVERSE SECTION 15 1 General Description 15 2 Operation 15 3 Disassembly and Replacement ...

Page 229: ...t 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 t...

Page 230: ...UDIO550 650 810 EXIT REVERSE SECTION 15 2 JUNE 2002 TOSHIBA TEC a 3 sheets 1 copy Single sided printing operation A4 LT Step 1 Step 2 Step 3 Step 4 Step 6 Step 7 Step 8 1 2 1 1 2 2 1 2 3 3 3 3 Step 5 3 2 3 ...

Page 231: ... 15 3 e STUDIO550 650 810 EXIT REVERSE SECTION b 5 sheets 1 copy Duplex printing operation A4 LT Step 1 Step 2 Step 3 Step 4 Step 9 Step 6 Step 7 Step 8 1 2 1 2 1 3 1 2 4 3 4 4 Step 5 2 3 4 2 3 Step 10 4 5 3 1 5 2 3 5 3 4 5 ...

Page 232: ... 810 EXIT REVERSE SECTION 15 4 JUNE 2002 TOSHIBA TEC c 3 sheets 1 copy Single sided printing operation A3 LD B4 LG A4 R LT R Step 1 Step 2 Step 3 Step 4 Step 9 Step 6 Step 7 Step 8 1 2 1 1 2 2 1 2 3 3 2 3 Step 5 3 2 3 ...

Page 233: ...C 15 5 e STUDIO550 650 810 EXIT REVERSE SECTION d 4 sheets 1 copy Duplex printing operation A3 LD B4 LG A4 R LT R Step 1 Step 2 Step 3 Step 4 Step 9 Step 6 Step 7 Step 8 1 2 1 2 1 3 1 2 4 3 4 4 Step 5 2 3 4 2 3 Step 10 4 3 ...

Page 234: ...rse unit 1 Remove 6 screws and take off the exit side cover 2 Remove 1 screw and take off the fixing bracket 3 Disconnect 1 connector and lift the exit reverse unit to take it off B Reverse section fan 1 Remove the exit side cover 2 Disconnect 1 connector remove 2 screws and take off the fans Connector Connector ...

Page 235: ...f 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 3 Disconnect 1 connector remove 2 screws and take off the re...

Page 236: ...t 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 Move 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 ring Bearing O ring ...

Page 237: ...nal condition A3 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...

Page 238: ...er etc discharges an original to either the large or small receiving tray after scanning is finished When two sided scanningis carried out the original is reversed by switching the reverse flapper and fed again to the ADF original glass 16 REVERSING AUTOMATIC DOCUMENT FEEDER RADF 16 1 General Description Tray sensor Feed roller Registration roller 1st roller 2nd roller 3rd roller 4th roller Read r...

Page 239: ...ginal length sensor Read roller Registration sensor Exit Reverse roller Original width sensor Intermediate transport roller Read sensor Small original reverse roller Intermediate transport sensor Small original exit roller Large original exit sensor Small original reverse sensor Small original exit sensor Original feeding tray Original feeding tray Tray sensor Tray width sensor Drive control secti...

Page 240: ...d seen in front 2 Feed motor rotating in reverse seen in front Feed motor rotates clockwise to feed originals Rear Front Registration roller One way pulley lock One way pulley idling Feed motor Feed motor rotates counterclockwise to feed originals Rear Front One way pulley lock One way pulley idling ...

Page 241: ...t motor swiches to the backside of an original by rotating clockwise and registers that side 4 large original exit motor rotating in reverse seen in front Large original exit roller Large original exit motor Large original exit motor rotates countericlockwise to discharge and reverse originals Small original exit motor Small original exit motor rotates clockeise to transport and discharge original...

Page 242: ...lift motor rotating forward seen in front Tray lift motor Tray lift motor Tray lift motor rotates counterclockwise to lift the tray 6 Tray lift motor rotating in reverse seen in front Tray lift motor rotates clockwise to lower the tray Lifting tray LIfting tray ...

Page 243: ...E SNS LNGS SNS DC 24V DC 5V Commu nication circuit Irruptive current control circuit The following 8 lines are used for sending receiving of signals between the copier and RADF REQ Communication request signal copier to RADF DF REQ Communication request signal RADF to copier DF ACK Response signal to communication request signal RADF to copier ACK Response signal to communication request signal co...

Page 244: ...er 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 detects 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 tr...

Page 245: ...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 t...

Page 246: ...e 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 When the le...

Page 247: ...ng 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 ...

Page 248: ...RADF When the original has proceeded a specified distance after the small original exit sensor had detected the trailing edge of the original the small original exit motor stops rotating Then the operation ends after 2nd original has been discharged ...

Page 249: ...the SCN STR and the large original exit solenoid turn ON When the leading edge of the original 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 star...

Page 250: ...inal 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 8 Start of 1st original back side scanning Scanning starts after receiving the original transport sign...

Page 251: ...on and stops before the trailing edge of the original passes the 3rd roller 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 ...

Page 252: ...ller 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 The large original exit solenoid turns OFF when the large original exit motor stops rota...

Page 253: ...all 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 13 Aft...

Page 254: ...y after the small original reverse sensor has detected the leading edge of the original The small original exit motor stops rotating when the trailing edge of 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 ...

Page 255: ...ation 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 orig...

Page 256: ...rd 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 spe...

Page 257: ...ns 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 ...

Page 258: ...e 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 ...

Page 259: ...olenoid 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 t...

Page 260: ...istance 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 transport signal from the copier At the same time the original transport signal is reset When the re...

Page 261: ...ime 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 mo...

Page 262: ...d 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 ...

Page 263: ...n 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 mot...

Page 264: ...s 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 s...

Page 265: ...dged 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...

Page 266: ...rward 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 exit 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...

Page 267: ...riginal 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 motor starts to rotate in reverse When the trailing edge of the original has passed the scanning section t...

Page 268: ...he 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 ...

Page 269: ...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 r...

Page 270: ...he 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...

Page 271: ...nt number of pulses it takes for an original to proceed the distance 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 r...

Page 272: ... 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 origina...

Page 273: ...ned 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 for the jam pulse is the equivalent number of pu...

Page 274: ... 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 90V 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 ...

Page 275: ...tored 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 3 Feeding direction size When the leading edge of an original reaches the position 7mm further from the read sensor the original size is decided by considering the information whether or not the original length sensor is ON origina...

Page 276: ... OFF OFF ON OFF OFF ON OFF OFF ON Size 1 Width 196 0 mm or over OFF ON OFF ON OFF ON OFF ON OFF ON Mixed originals mode NO YES NO YES Tray sensor receiving ORG IN OFF ON OFF ON Switch back pro hibited NO YES NO YES Reversal without reading length detected mm 314 357 357 277 314 357 357 314 357 357 Reversal without reading length decided mm 297 330 384 257 297 330 384 297 330 384 Size 288 2 mm or o...

Page 277: ...th 196 0 mm or over OFF ON OFF ON OFF ON OFF ON OFF ON Mixed originals mode NO YES NO YES NO YES Tray sensor receiving ORG IN OFF ON OFF ON OFF ON Switch back pro hibited Reversal without reading length detected mm 305 343 394 394 305 343 394 394 305 343 394 394 Reversal without reading length decided mm 279 330 356 432 279 330 356 432 279 330 356 432 Size Width 288 2 mm or over OFF ON OFF ON Size...

Page 278: ...16 41 e STUDIO550 650 810 RADF 16 9 Flow Chart 1 Power ON Start of communication line YES NO A Power ON Jig board installed Program rewritten Data read from EEPROM B Communication started Sensor adjusted Cover closed NO YES ...

Page 279: ...ompleted Normal ROM installed on jig board Flash ROM deleted NO YES Flash ROM rewritten YES Success of rewriting displayed on LED Failure of rewriting displayed on LED Flash ROM rewriting succeeded NO Flash ROM succeeded to delete Failure of deleting flash ROM displayed on LED ROM abnormality displayed on LED ...

Page 280: ...itoring YES NO B NO YES Initialization YES NO 1 NO NO 3 Cover closed Original setting signal received NO Initialization detected jam YES All sensors OFF 4 全センサOFF 全センサOFF Finished due to jam Operation started 1 YES Operation completed 3 YES Cover open 3 4 Cover opened YES NO YES NO Cover opened NO ...

Page 281: ... Read motor forward rotation Small original exit motor forward rotation YES NO Initialization started Feed motor reverse rotation Large original exit motor reverse rotation For paper no removal detection specified time passed Paper no removal detection Original found on the transporting path Jam ...

Page 282: ... NO Lifting tray up completed YES NO A Feed motor forward rotation Feed motor stopped 2 YES NO 1 Registration sensor OFF Registration sensor ON YES Feed motor stopped YES 2 Pre feeding control from registration roller started Pre feeding trailing edge control started Control for Separation completed YES NO NO Registration sensor ON NO Specified pulse passed From original length sensor ON specified...

Page 283: ...er started NO Feed acceptable NO Feed motor acceleration completed NO Reached the 1st roller NO First copy YES Read motor stopped YES Size detected Control for leading edge scanning started Control for pre feeding from the 1st roller started NO Read sensor ON NO Specified pulse passed NO YES Size detection succeeded Reversal without reading started YES Control for pre feeding from registration rol...

Page 284: ...ction started Trailing edge control for pre feeding started NO YES YES A Feed motor stopped 1 YES NO 1 YES NO Registration sensor OFF Small original Next original detection started Trailing edge control for pre feeding completed NO Small original NO Midpoint between registration roller and the 1st roller passed Original trailing edge passed original length sensor ...

Page 285: ...ection YES Control for next original detection completed Next original separation started YES Lifting tray up Control for next original detection started NO Specified time passed NO YES Lifting tray down Next original NO Lifting tray up completed NO Lifting tray down completed YES YES ...

Page 286: ...inal exit motor forward rotation YES A Large original exit solenoid ON 1 YES NO NO 1 Read motor started Disengagement solenoid ON Original trailing edge on separation side YES NO Large original exit motor stopped Disengagement solenoid ON completed The 3rd roller reached C YES YES NO Original trailing edge passed original length sensor Original trailing edge on large original exit side Leading edg...

Page 287: ...Disengagement solenoid ON C YES YES YES NO The 4th roller reached NO Large original exit sensor ON NO Large original exit roller reached NO Large original exit motor stopped YES YES Leading edge transported to large original exit side Leading edge control during transporting started Large original exit motor used in RADF transporting operation ...

Page 288: ...g start signal reset 1 YES Scanning position passed NO YES NO 2 1 Transported to large original exit side YES YES NO Original trailing edge passed the 1st roller NO Read sensor OFF YES Original trailing edge on separation side NO Read motor accelerated until max speed Large original exit motor accelerated until max speed Disengagement solenoid OFF ...

Page 289: ...ginal discharging started Trailing edge control during scanning completed YES NO The 3rd roller passed NO The 4th roller passed The 4th roller pass margin passed Trailing edge control during transporting started NO Transported to large original exit side NO The 3rd roller pass margin passed YES YES ...

Page 290: ...original exit sensor ON Large original exit motor decelerated NO Large original sensor OFF Discharged on large original exit side Original reversed Large original exit motor stopped Large original exit roller pass margin passed YES YES NO Trailing edge control for large original discharging completed Large original exit motor forward rotation Back side aligned NO NO NO NO Specified pulse passed La...

Page 291: ... original exit motor reverse rotation Leading edge control during transporting started NO YES YES 1 NO 1 YES NO Intermediate transport sensor ON Back side Leading edge control during transporting completed NO NO Small original exit motor reversal sensor ON Back side NO Intermediate transport roller reached YES YES Specified pulse of original leading edge passed from the 3rd roller ...

Page 292: ...it motor forward rotation NO Trailing edge control for small original discharging started Small original exit sensor ON YES YES Trailing edge control during transporting completed NO NO Intermediate transport sensor OFF Large original exit motor speed changed to scanning one Next original leading edge reached YES YES YES Front side Small original exit motor decelerated NO Small original reversal s...

Page 293: ...sensor OFF NO NO Small original exit roller passed Small original reversal sensor OFF YES NO A Leading edge control for small original discharging started Small original exit motor forward rotation YES Small original exit sensor ON NO Leading edge control for small original discharging completed Trailing edge control for small original discharging completed YES YES NO Specified pulse passed Back s...

Page 294: ...inal exit solenoid Disengagement solenoid Large original exit sensor Intermediate transport sensor Small original exit motor Small original reverse sensor Small original exit sensor Small original exit solenoid 0 1000 2000 3000 4000 5000 6000 7000 ms 313 323 348 562 631 1003 811 950 2510 2860 4429 4539 1024 2483 2943 4402 761 1035 1129 1233 1363 1129 1580 3499 4620 2701 1385 2483 2634 4402 4553 28...

Page 295: ... motor Small original reverse sensor Small original exit sensor Small original exit solenoid 313 323 348 562 631 1003 811 950 2510 2711 3135 3188 4748 4949 5072 6334 7894 8095 1024 2483 3262 3389 6408 6535 761 1035 1129 1233 1363 1129 1580 2805 6964 4939 6166 2701 1385 2483 2634 27643065 3085 3367 3623 4721 4872 5002 5365 6099 7867 8018 8148 5500 6085 7894 8004 2733 3273 2744 2786 3054 3262 3471 3...

Page 296: ...nal SCN STR Large original exit motor Large original exit solenoid Disengagement solenoid Large original exit sensor Intermediate transport sensor Small original exit motor Small original reverse sensor Small original exit sensor Small original exit solenoid 8855 10105 7894 7867 8586 10105 8120 8469 8657 8751 1035810406 11494 8095 8519 8572 10132 10333 10456 11469 8646 8773 8625 10652 9982 11277 8...

Page 297: ...STR Large original exit motor Large original exit solenoid Disengagement solenoid Large original exit sensor Intermediate transport sensor Small original exit motor Small original reverse sensor Small original exit sensor Small original exit solenoid 313 323 423 652 1204 1433 691 995 1472 1911 964 1638 1129 1452 984 1900 741 562 631 1003 1735 2622 2914 2038 1911 1151 1024 964 811 950 2925 2016 192...

Page 298: ...1 1035 1129 1233 1365 1858 2009 2561 3209 3498 3592 3983 4003 4576 5682 6348 5024 4618 4886 5094 5303 4967 5020 5221 4321 3732 4472 6097 6124 6323 4596 4897 5105 5316 4917 2013 2122 2424 2444 2841 2632 2726 3231 3487 3614 4025 4565 3759 3958 4348 4458 2092 2145 2494 2547 2748 2143 2621 2826 1885 1995 1385 1233 1580 2164 4043 4637 2076 2895 3359 3209 4187 5662 6542 4647 4257 4630 6612 6985 4807 716...

Page 299: ...tering PTr 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 R109 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 ...

Page 300: ... 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 ...

Page 301: ...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 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 IC15 6 7 8 9 to control the speed and direction of the...

Page 302: ... 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...

Page 303: ...ROM circuit This circuit is an EEPROM to store ADF data and its peripheral circuit 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 receiv...

Page 304: ...utput signal of the reflective sensor and used to adjust the sensor automatically 9 Conversion circuit for D A 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 from Ao1 to Ao4 are used to adjust the light intensity of the light emitting diode L...

Page 305: ...8 JUNE 2002 TOSHIBA TEC 16 12 Input Output Signals 1 TXD ACK REQ signals This is an input circuit to communicate with the copier 1 substitutes 5V and 0 substitetes 0V The same logic is used in both the connector and CPU input port ...

Page 306: ...6 69 e STUDIO550 650 810 RADF 2 RXD SCN STR DF_ACK DF_REQ signals This is an input circuit to communicate with the copier 1 substitutes 5V and 0 substitetes 0V The same logic is used in both the connector and CPU output port ...

Page 307: ...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 ...

Page 308: ...JUNE 2002 TOSHIBA TEC 16 71 e STUDIO550 650 810 RADF Small original reverse sensor Read sensor Large original exit sensor Original length sensor These are the input circuits from each photosensor ...

Page 309: ...original REGS Registration sensor Original existing No original TRYS Tray sensor Original existing No original LIMTS Lower limit sensor Lower limit ITFS Intermediate transport sensor Original existing No original SOES Small original exit sensor Original existing No original READS Read sensor No original Original existing SSBS Small original reverse sensor No original Original existing LOES Large o...

Page 310: ...connector 2 Remove 2 screws open and move the RADF unit toward the rear side and take it off upward B Covers 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 and take off the ADF rear cover ADF front cover ADF rear cover Connector ...

Page 311: ... Clip C 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 ...

Page 312: ... 3 clips and pull out the feed roller shaft pickup roller belt and pickup intermediate shaft Then take off the pickup belt and feed roller 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 Feed roller Clip Pickup belt Separation unit Clip Bushing Separation roller Upper guide unit ...

Page 313: ...otor with the tension bracket 5 Remove 2 screws and release the feed motor from the tension bracket Installing procedure 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...

Page 314: ...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 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...

Page 315: ...ng 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...

Page 316: ... and move the harness duct to the right side 4 Remove 1 screw fixing the disengagement 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 F Solenoids F 1 Small original exit solenoid 1 Remove the ADF rear cover 2 Remove the ADF board with the bracket 3 Remove the large original ...

Page 317: ...r guide unit 2 Remove 2 screws and take off the upper guide stay Lifting tray lower limit sensor Inlet Reverse guide Lower guide Upper guide stay G 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 u...

Page 318: ...ve 3 screws and take off the back cover 2 Disconnect 1 connector release the latches and take off the tray sensor G 3 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 Original length sensor Cover open close switch Back cover Tray s...

Page 319: ...over 2 Disconnect 1 connector 3 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 Sensor flag Platen sheet Small original transport guide Scanning end guide G 6 Tray width sensor 1 Open the tray remove 3 screws and take off the back co...

Page 320: ...o it in the alignment shown by the right figure RADF open close switch Blue Orange Brown 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 the 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...

Page 321: ...onnect 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 transport guide 3 Release each latch disconnect each connector and take off the registration sensor and original width sensors Lar...

Page 322: ...H 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 Platen guide 2 3 ...

Page 323: ...e STUDIO550 650 810 RADF 16 86 JUNE 2002 TOSHIBA TEC I Mylar and mirror seal I 1 Mirror seal for original length sensor Ref Ref 0 0 5 mm 0 0 5 mm Upper guide Mylar ...

Page 324: ... Mylar for read sensor Mylar Attatch the mylar passing through the guide window to prevent twisting and too strong contact on the edge of the guide window Attach 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 ...

Page 325: ...it guide Ref Mirror seal Attach the mirror 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 Attatch the mirror seal passing through the guide window to prevent twisting and too strong contact on the edge of the guide window ...

Page 326: ...e STUDIO550 650 810 RADF Ref Ref 0 0 5 mm I 4 Mirror seal for small original reversal sensor Under transport guide for small original 0 0 5 mm Attatch the mirror seal with fitting the edge of it to the rib Do not interfere the rib ...

Page 327: ...RADF 16 90 JUNE 2002 TOSHIBA TEC Ref 1 1 5 mm I 5 Mirror seal for read sensor Platen guide Mirror seal Mirror seal Reference hole Attatch the mirror seal with locating its edge to the reference hole position Reference hole ...

Page 328: ...e STUDIO550 650 810 RADF Ref 0 1 0 mm I 6 Mirror seal for large original exit sensor Mirror seal Reverse guide Dispositioning from the edge of the guide is not allowed Attatch the mirror seal between ribs Do not interfere the rib ...

Page 329: ...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 ...

Page 330: ...tion 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 mai...

Page 331: ...put to SYS board 2 5 1V 5 1VB J405 5pin 6pin 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 5 1VE J408 7pin 8pin Output to SLG board 5 1VF J407 1pin Output to PLG board 5 1VG J407 2pin Output to PLG board 5 1VH J409 1pin Output to Finisher 3 12V 12VA J405 13pin Output to HDD 12VB J407 6pin Output to PLG board 12VC J408 11p...

Page 332: ... door switch 1 5 1V 5 1VA J403 3pin Output to PLG board 2 24V 24VA J402 1pin Output to LGC board 24VB J402 2pin Output to LGC board 24VC J402 3pin Output to LGC board 24VD J403 1pin Output to PLG board 24VE J404 5pin Output to SLG board 24VH J409 3pin 4pin Output to Fnisher 3 36V 36VA J402 7pin Output to LGC board 36VB J402 8pin Output to LGC board 36VC J404 1pin 2pin Output to SLG board ...

Page 333: ...Output connector Not working with the door switch J405 for SYS board J406 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 ...

Page 334: ...g 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...

Page 335: ...r unit motor F6 4A Semi time lag Feed motor 36VB LGC Drum motor Transfer belt motor 24VD PLG Polygonal motor F7 4A Semi time lag OPT Laser unit fan motor 24VE SLG SLG fan motor Scanner SLG 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 LG...

Page 336: ...VA LGC 36VB LGC 24VD PLG 24VE SLG 5 1VA PLG 36VC SLG 24VH FIN 3 3VC SYS 5 1VB SYS 12VA SYS 5 1VC SYS 5 1VD LGC 12VD LGC 24VG LGC 24VF RADF 3 3VB SLG 5 1VE SLG 12VC SLG 5 1VF PLG 5 1VG PLG 3 3VA PLG 12VB PLG 5 1VH FIN F4 F9 Live Neutral Breaker Noise filter Main switch Door switch IH Frequency reactor Noise filter Switching power supply Frequency reactor Noise filter ...

Page 337: ... Within 700ms Within10ms 3 2V or more 4 95V or more 11 4V or more 21 6V or more 4 95V or more 21 6V or more 34 2V or more 3 2V or more 4 95V or more 11 4V or more 21 6V or more 4 95V or more 21 6V or more 34 2V or more 10ms 120ms 20ms or more 10ms or more 20ms or more 50ms or more 0 200ms 5msormore 0msormore 0 200ms PWR DN 0 200ms 0 200ms 5msormore 0msormore 0 200ms Within 200ms ...

Page 338: ...18 PC BOARDS ...

Page 339: ...JUNE 2002 TOSHIBA TEC 18 1 e STUDIO550 650 810 PC BOARDS 18 PC BOARDS 1 PWA F SYS 340 ...

Page 340: ...e STUDIO550 650 810 PC BOARDS 18 2 JUNE 2002 TOSHIBA TEC 2 PWA F LGC 340 ...

Page 341: ...JUNE 2002 TOSHIBA TEC 18 3 e STUDIO550 650 810 PC BOARDS 3 PWA F SLG 340 ...

Page 342: ...e STUDIO550 650 810 PC BOARDS 18 4 JUNE 2002 TOSHIBA TEC 4 PWA F PLG 340 ...

Page 343: ...JUNE 2002 TOSHIBA TEC 18 5 e STUDIO550 650 810 PC BOARDS 5 PWA F CCD2 340 ...

Page 344: ...e STUDIO550 650 810 PC BOARDS 18 6 JUNE 2002 TOSHIBA TEC 6 PWA F LDR 340 7 PWA F SNS 340 8 PWA F MOT 340 ...

Page 345: ...JUNE 2002 TOSHIBA TEC 18 7 e STUDIO550 650 810 PC BOARDS 9 PWA F MOT2 340 10 PBA CONTROL ADF CONTROL PC BOARD ...

Page 346: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8442 JAPAN R02032111900 TTEC ...

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