Toshiba 4580 Service Manual Download Page 82

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Mar. 1999 © TOSHIBA TEC

6 - 1

6570/5570 IMAGE PROCESSING

IMAGE PROCESSING

6.1

Introduction

The following diagram shows the processes beginning at the Scanner section to the Printer section

(where light is transferred to the photosensitive drum.)

ASIC which is short for “Application Specific IC” is for a specific use.

The following table shows the functions carried out by the two image processing boards.

Board

Number of ASIC

Fanction

SLG board

(PWA-F-SLG-300)

PLG board

(PWA-F-PLG-300)

Image processing/

Print control

[PLG]

Image processor

Photosen-
sitive drum

System board

[SYS]

Image

processing

[SLG]

Scanner

Original

Original glass

Scanner

[CCD]

Semicon-
ductor laser
device

Laser drive board

[LDR]

Printer

Polygonal motor

drive board

[POL]

LGC board

High quality image processing, image memory editing, editing

processing, gamma correction, tone processing, external output

system interface

Smoothing processing, external input system interface, image area

control, laser related control

Summary of Contents for 4580

Page 1: ...SERVICE MANUAL DIGITAL PLAIN PAPER COPIER 8070 6570 5570 4580 ...

Page 2: ...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 the transfer belt and the high voltage transformer Be sure not to touch rotating operating sections such as gears belts pulleys fan etc When servicing the machines with the main switch turned ...

Page 3: ...rong places 7 Basically the machine should not be operated with any parts removed or disassembled 8 Precautions Against Static Electricity The PC board must be stored in an anti electrostatic bag and handled carefully using a wrist band because the ICs on it may become damaged due to static electricity Caution Before using the wrist band pull out the power cord plug of the copier and make sure tha...

Page 4: ...odes Paper supply 1 In the models of 6500 6570 5500 5570 In the case of the automatic document feeder 65 55 sheets minute when an A4 LT size single sided original is fed in the continuous copy mode at original size by the LCF Re processing speed of automatic duplexing unit A4 A5 R LT ST R 65 55 sheets minute A4 R LT R 51 45 sheets minute LG 44 39 sheets minute A3 LD 38 34 sheets minute Note CPM in...

Page 5: ...density detection and replenishment Toner hopper supply Exposure control Automatic control and manually selectable 11 steps Weight Copier 250 kg Copy paper Cassette Duplexing LCF Manual feeding Note Size A3 A5 R A4 LT A3 A5 R Adjustable to a non LD ST R LD ST R standard size Thickness 64 80 g m2 64 130 g m2 Special Tracing paper label Our company paper paper OHP film recommended Copy mode 6500 657...

Page 6: ...hout notice in the interest of product improvement Power source AC115V 20A AC 220 240V 10A Power consumption 2 0 kW or less The power of the automatic document feeder automatic duplexing unit and LCF is supplied from the copier body Total counter Mechanical total counter Machine size Refer to the figure below 920mm 742mm 1111mm ...

Page 7: ...or MJD Sheet CE 1 pc Original feed tray 1 pc Set up report 1 set For NAD MJD 1 3 Options DP4580 5570 6570 8070 DP5500 6500 8000 Finisher MJ 1006 MJ 1007 MJ 1015 MJ1016 Hole punch MJ 6002N MJ 6002E MJ 6002F MJ 6002S Staple cartridge STAPLE 600 STAPLE 700 Key counter MU 8 MU 10 Working tray KK 6570 1 4 Supplies Drum OD 6570 Developer D 6570 Toner bag TB 6550 TB 6550E Toner T 6570 T 6570E ...

Page 8: ... 5570 4580 SPECIFICATIONS 1 5 System List Working tray KK 6570 Staple cartridge Finisher STAPLE 600 MJ 1016 MJ 1017 STAPLE 700 Key counter Key counter socket MU 10 MU 8 Supplies Drum Toner bag Toner Developer 1 For DP4580 5570 6570 8070 ...

Page 9: ...70 Staple cartridge Finisher STAPLE 600 MJ 1015 MJ 1016 STAPLE 700 Key counter Key counter socket MU 10 MU 8 Supplies Drum Toner bag Toner Developer Hole punch MJ 6002N MJ 6002E MJ 6002F MJ 6002S 2 For DP5500 6500 8000 8070 6570 5570 4580 SPECIFICATIONS 1 6A Mar 2000 TOSHIBA TEC ...

Page 10: ...ing drive systems 1 13 14 10 5 3 2 11 29 31 30 34 23 24 19 17 15 16 18 67 66 68 71 70 69 72 73 80 82 75 83 84 76 85 87 77 106 107 89 91 90 92 93 94 96 102 100 99 97 101 103 104 121 105 59 58 57 56 55 51 50 48 49 117 118 111 112 122 115 113 116 114 109 41 40 39 35 37 38 22 21 27 25 28 26 20 74 46 43 47 64 65 63 108 110 119 54 53 52 32 33 36 60 61 62 6 7 8 9 12 4 44 42 45 123 120 ...

Page 11: ...e 39 Transfer belt 40 Transfer belt drive roller 41 Transfer belt cleaning brush 42 Transfer belt toner recovery auger 43 Transfer belt power supply roller 44 Lower damp heater 45 Lower damp heater cover 46 Transfer belt follower roller 47 Transfer belt separation auxiliary roller 48 Exit roller 49 ADU eject selector gate 50 ADU reversal transport roller 51 ADU reversal selector gate 52 TR1 sensor...

Page 12: ... PFP lower Feed roller 96 PFP lower pick up roller 97 Upper elevator 99 PFP middle pick up roller 100 Middle elevator 101 PFP upper pick up roller 102 Lower elevator 103 Lower cassette No Name 104 Middle cassette 105 Upper cassette 106 Wire rewind roller 107 Tray motor M30 108 Lower heat roller 109 Thermostat 110 Cleaning roller 3 111 Lower separation claw 112 Upper separation claw 113 Heater lamp...

Page 13: ...cleaning motor M11 130 Toner recovery auger 131 Toner transport auger 132 Fur brush 133 Transport roller G23 No Name 134 Gate solenoid 135 End guide motor M8 136 Side guide motor M9 137 ADU inlet reversal roller 138 Forward rotation clutch 139 Reversal clutch 140 Holding gate solenoid 141 Transport roller clutch 126 127 125 136 128 130 132 129 133 131 135 137 138 134 139 140 141 ...

Page 14: ...em 150 149 148 146 145 147 163 204 206 207 162 167 164 165 170 166 179 180 181 182 183 184 186 185 188 189 190 191 192 193 194 195 178 198 199 151 209 208 200 156 153 152 155 154 157 159 158 160 205 175 176 177 168 169 161 203 202 201 174 173 172 171 196 197 187 ...

Page 15: ...oller pulley 176 Fuser drive belt 177 Heat roller motor M18 No Name 178 Toner transport motor M15 179 PFP upper feed roller 180 Upper feed roller clutch CL6 181 PFP upper separation roller 182 PFP middle feed roller 183 Middle feed roller clutch CL10 184 PFP middle separation roller 185 Lower feed roller clutch CL11 186 PFP lower feed roller 187 PFP lower separation roller 188 Pedestal motor M31 1...

Page 16: ...or 5 Separation pad 6 Feed cover switch 7 Aligning sensor 8 Size sensor 9 Size sensor lever No Name 10 Timing sensor 11 Aligning roller 12 Feed roller 13 Belt drive roller 14 Belt drop roller 15 DF open switch 16 Belt holding roller 17 Transport belt 18 Belt holding roller No Name 19 APS switch 20 Belt follower roller 21 Reversal roller 22 Exit sensor 23 Exit cover switch 24 Flapper 25 Exit roller...

Page 17: ...6570 5570 OUTLINE 2 8 Mar 1999 TOSHIBA TEC 2 1 2 Electrical parts layout A Configuration of Units Lower unit Upper unit ADU Scanner unit Laser unit Rear side Systemunit ...

Page 18: ...570 OUTLINE B Scanner Unit B 1 PC board No Name Symbol 1 CCD drive PC board PWA F CCD 300 CCD 2 Scanning optical system control PC board PWA F SLG 300 SLG 3 Scanning motor drive PC board PWA F SDV 300 SDV Rear side Scanner unit 1 2 3 ...

Page 19: ...s except motors PC boards A4 series No Name Symbol 1 Automatic paper size detector APS1 6 S1 6 2 Home switch HOME SW S2 LT series No Name Symbol 1 Automatic paper size detector APS1 4 S1 4 2 Home switch HOME SW S2 Rear side Scanner unit 1 2 Rear side Scanner unit 1 2 ...

Page 20: ...otor OPT FAN MOT M3 1 2 4 SLG PC board cooling fan motor SLG FAN MOT M4 B 4 AC electrical parts No Name Symbol 1 Damp heater M D HTR M DHM 2 Damp heater L D HTR L DHL 3 Fuse PC board PWA F FUS 351 FUS 5 Thermostat 85 C THMO 6 Exposure lamp EXPO LAMP EXP EXP 7 Lamp regulator PC board PS LRG 300 LRG Rear side Scanner unit 2 1 4 3 Rear side Scanner unit 1 6 5 4 2 7 3 ...

Page 21: ... mirror motor drive PC board M A DRV POL 300 POL 3 Sensor PC board PWA F SNS 300 SNS 4 Laser PC board K PWA F LDR 300 LDR C Laser Unit C 1 PC boards C 2 Electrical parts except motors PC boards No Name Symbol 1 Galvanomirror ASM GALVA GLV Rear side Laser unit 3 2 4 4 1 4 4 Rear side Laser unit 1 1 1 1 ...

Page 22: ...r unit fan LSU FAN MOT M6 D System Unit D 1 PC boards No Name Symbol 1 System PC board PWA F SYS 300 SYS 2 Mother board PWA F MTB 300 MTB 3 Hard disk HDD HDD 4 LAN printer board or SCSI board option LAN or SCSI 5 NIC board option for LAN printer board NIC 1 2 Rear side Laser unit Rear side System unit 1 4 5 3 2 ...

Page 23: ...70 5570 OUTLINE 2 14 Mar 1999 TOSHIBA TEC D 2 Motor No Name Symbol 1 System fan motor FAN SYS M7 E ADU E 1 PC board No Name Symbol 1 ADU PC board PWA F ADU 300 ADU 1 Rear side System unit 1 Rear side ADU ...

Page 24: ...W S4 3 Transport switch 1 TR1 SW S5 4 Transport clutch TR CLT CL1 5 Reverse clutch REV CLT CL2 6 Guide solenoid GID SOL SOL1 7 Stack clutch STK CLT CL3 8 Feed switch FED SW S6 9 Empty switch EMP SW S7 10 Aligning switch RGT SW S8 11 Aligning clutch RGT CLT CL4 12 Feed clutch FED CLT CL5 13 Side switch SID SW S9 7 8 9 10 13 12 11 6 5 4 3 2 1 ADU Rear side ...

Page 25: ...6570 5570 OUTLINE 2 16 Mar 1999 TOSHIBA TEC E 3 Motors No Name Symbol 1 End guide motor END MOT M8 2 Side guide motor SID MOT M9 1 2 Rear side ADU ...

Page 26: ...Mar 1999 TOSHIBA TEC 2 17 6570 5570 OUTLINE F Upper Unit F 1 PC board No Name Symbol 1 Motor control PC board PWA F MOT 300 MOT 1 Upper unit Rear side ...

Page 27: ...g switch CLN M SW S16 10 Heat roller thermistor THMS HTR 300 THMSH 11 Developer bias transformer PS HVT DB 300 HVT DB 12 High voltage power supply for main charger and transfer belt PS HVT TM 300 HVT TM 13 Reversal exit switch TRNE SW S17 14 Reversal switch TRN SW S18 15 Reversal door switch EXC SW S19 16 Discharge LED lamp ERS 300 ERS 17 Gate solenoid GATE SOL SOL4 18 Transfer belt touch switch I...

Page 28: ...motor DEV MOT M16 8 Aligning motor RGT MOT M17 9 Heat roller motor HTR MOT M18 10 Exit fan motor EXIT FAN MOT M19 11 Heater fan motor HTR FAN MOT M20 12 Developer fan motor DEV FAN MOT M21 13 Duct in fan motor DUCT IN FAN MOT M22 14 Duct out fan motor DUCT OUT FAN MOT M23 15 ADU motor ADU MOT M24 16 Transfer belt motor TRB MOT M25 17 Transfer belt cam motor TRB CAM MOT M26 18 Reversal fan motor RE...

Page 29: ...h DOOR SW S41 2 Main switch MAIN SW S42 3 Fuse PC board PWA F FUS 351 FUS 4 Damp heater lower D HTR L DHL 1 2 5 Thermostat THM D 6 Heater lamp HTR LAMP HTR L 7 Fuser thermostat THERMO 152 FUS THM F 8 EXIT door switch EXIT AC SW S45 9 Fuser switch HTR SW S46 6 7 3 2 1 5 4 Rear side Upper unit 9 8 ...

Page 30: ...Mar 1999 TOSHIBA TEC 2 21 6570 5570 OUTLINE G Lower Unit G 1 PC boards No Name Symbol 1 Logic PC board PWA F LGC 300 LGC 2 LCF PC board PWA F LCF 150 LCF 1 2 Rear side Lower unit ...

Page 31: ...tart switch S28 FEED2 SW 15 PFP upper paper empty switch S29 EMP2 SW 16 PFP upper tray up switch S30 TUP2 SW Rear side Lower unit 26 21 17 18 10 31 16 15 25 12 13 14 11 22 23 24 20 19 1 2 9 8 5 30 29 27 28 4 3 7 6 No Name Symbol 17 PFP middle paper stop switch S31 PSTP3 SW 18 PFP middle paper start switch S32 FEED3 SW 19 PFP middle empty switch S33 EMP3 SW 20 PFP middle tray up switch S34 TUP3 SW ...

Page 32: ... 3 Motors No Name Symbol 1 PFP upper tray motor TR2 MOT M27 2 PFP middle tray motor TR3 MOT M28 3 PFP lower tray motor TR4 MOT M29 4 LCF tray motor TRAY MOT M30 5 Pedestal motor PFP MOT M31 6 Feed motor FED MOT M32 1 2 3 4 5 Rear side Lower unit 6 ...

Page 33: ...ctrical parts No Name Symbol 1 SSR SSR 2 Breaker BRK 3 Noise filter NF 4 Switching power supply unit for JPD PS ACC 300JU PS Switching power supply unit for EUR PS ACC 300E 5 Power outlet POUT 6 Fuse holder FUSE HOLDER FHOL 1 4 6 3 Rear side Lower unit 2 5 ...

Page 34: ... transport motor Transport waste toner to the toner bag M16 DEV MOT developer motor Drives the developer unit and suction fans M17 RGT MOT aligning motor Drives the aligning roller M18 HTR MOT heat roller motor Drives the heat rollers M19 EXIT FAN MOT exit fan motor Cools paper exit M20 HTR FAN MOT heater fan motor Cools the drum and cleaner M21 DEV FAN MOT developer fan motor Used for sucking air...

Page 35: ... upper aligning clutch Transfers drive to the PFP upper aligning roller CL8 RGT3 CLT PFP middle aligning clutch Transfers drive to the PFP middle aligning roller CL9 RGT4 SW PFP lower aligning clutch Transfers drive to the PFP lower aligning roller CL10 FD3 CLT PFP middle feed clutch Feeds the PFP middle cassette paper CL11 FD4 CLT PFP lower feed clutch Feeds the PFP lower cassette paper 4 Counter...

Page 36: ... unit S24 LCF DOOR SW LCF door switch Detects opening closing of the LCF door S25 LCF FEED SW LCF paper start switch Detects the LCF feed roller S26 LCF EMP SW LCF paper empty switch Detects LCF paper empty S27 PSTP2 SW PFP upper paper stop switch Used for aligning paper supply from the upper cassette S28 FEED2 SW PFP upper paper start switch Detects paper supply from the upper cassette S29 EMP2 S...

Page 37: ... the optical system at the preset temperature DHL D HTR L damp heater L Maintains the optical system at the preset temperature DHL D HTR L damp heater lower Maintains the drum and transfer separation charger case at the preset temperature HTR L HTR LANMP heater lamp Used for fusing EXP EXPO LAMP exposure lamp Exposes the original LRG PS LRG 300 lamp regulator PC board Controls the exposure lamp ER...

Page 38: ... voltage for charging and supply for main charger and transfer belt transfer and the developer bias voltage 9 Other Symbol Name Function Remarks ATS SNR ATC 300 auto toner sensor Senses the toner temperature by a magnetic sensor GLV ASM GALVA galvanomirror Control the beam position FUS PWA F FUS 351 fuse PC board Cuts out an over current of the damp heater THMSH THMS HTR 300 heat roller thermistor...

Page 39: ... Gate Array PFC PWA F LGC 300 SRAM ROM NVRAM Serial I F Serial I F ADR DAT Bus I O Bus 64bit RISC OSC Flash ROM 1 Flash ROM 1 PWA F SLG 300 S CPU SRAM EPROM ADR DAT Bus Serial I F Image Data ASIC Image Data PWA F CCD 300 CCD Amp Amp A D A D ASIC PWA F PLG 300 D A L CPU D A EPROM SRAM ADR DAT Bus Galvano DRV Galvano DRV ASIC Galvanic Mirror 1 Galvanic Mirror 2 Galvanic Mirror 3 Galvanic Mirror 4 La...

Page 40: ...th ends 2 screws for each B Left front cover 1 Open the right front cover then open the left front cover 2 Remove the top and bottom hinge brackets 2 screws for each C Lower front cover 1 Remove the intermediate and lower cassettes 2 Remove the 3 screws D Rear cover 1 Remove the 10 screws 2 Remove the lower hook 3 p ces Hinge Right front cover Hinge Left front cover Lower front cover Rear cover Fo...

Page 41: ...e the LCF unit 2 Remove the 2 screws F Lower feed cover 1 Draw out the LCF and remove the manual feed unit 2 Remove the lower feed cover 3 screws 1 con nector both sides hooks 4 pcs Hooks Power switch cover G Power switch cover 1 Slide the LCF unit 2 Remove the 3 screws ...

Page 42: ... I Upper exit cover lower exit cover PFP exit cover front exit cover and rear exit cover 1 Remove the upper exit cover 2 screws 2 Remove the front exit cover 3 screws 3 Remove the rear exit cover 2 screws 4 Remove the lower exit cover 4 screws 5 Remove the PFP exit cover 4 screws J Left top cover 1 Remove the 2 screws Feed side upper rear cover Toner bag cover Toner bag cover Upper exit cover Rear...

Page 43: ...es 1 screw for each and remove the toner supply cover N Middle inner cover 1 Open the right and left front covers 2 Remove the 3 screws O Right inner cover 1 Remove the middle inner cover 2 Remove the 3 screws P Left inner cover 1 Remove the middle inner cover 2 Remove the 3 screws Right top cover Toner supply cover Hinge Rear top cover Original glass Left inner cover Middle inner cover Right fron...

Page 44: ...transport unit left cover 1 Remove the 2 screws S PFP inner cover 1 Draw out the ADU unit 2 Remove the 4 screws 2 4 2 Removal of PC boards A Logic PC board PWA F LGC 300 1 Remove the rear cover 2 Disconnect the 15 connectors 3 Remove the lock supports 2 pcs and the 2 screws then remove the logic PC board Locking support Locking support Belt transport unit left cover Belt transport unit right cover...

Page 45: ...crews and then remove the SDV PC board E High voltage transformer for main charger and transfer PS HVT TM 300 1 Remove the rear cover 2 Disconnect the 5 connectors 3 Remove the lock supports 2 pcs and the 2 screws Then remove the high voltage trans former for main charger and transfer F Developer bias transformer PS HVT DB 300 1 Remove the rear cover 2 Disconnect the 2 connectors 3 Remove the 2 un...

Page 46: ...ws 2 Remove the rear exit cover 2 screws 3 Remove the PFP exit cover 4 screws 4 Remove the power supply inner cover 5 screws 5 Disconnect the 9 connectors 6 Remove the 4 screws and remove the switch ing power supply unit Note Claws are located on the base frame side floor side of the connector shown in the view A and are difficult to see Power inner cover Hook A Claw Base frame floor side ...

Page 47: ...nd remove the cover on the rear side 4 Remove the system PC board side of the har ness connecting the system PC board and the PLG PC board 5 Remove the screw fastening the system electrics unit 6 Remove the upper exit cover and open out the lower exit cover 7 Remove the slot cover on the inside of the up per exit cover 15 screws 8 Disconnect the 4 connectors from the system PC board and the 2 scre...

Page 48: ...TEC 2 39 6570 5570 OUTLINE I HDD 1 Remove the upper exit cover 2 Remove the system electronics slot cover 15 screws 3 Remove the screw and connector and take out the HDD unit 4 Remove the bracket 4 screws HDD Connector ...

Page 49: ...osensitive drum 2 Original exposure Images are converted to optical signals 3 Scanning Image optical signals are converted to electrical signals 4 Printing Image electrical signals are converted to optical signals for laser emission and ex posed on the photosensitive drum 5 Development toner adheres to the surface of the photosensitive drum and forms a visible image 650V Charger Scanning CCD Separ...

Page 50: ...t from the scanner optics system while the minus charge remains on the surface of the drum corresponding to the white areas of the original document The resultant image which the human eye cannot see is called Latent Image 2 Charging Charging is the process of uniformly applying a charge to the surface of the photosensitive drum The minus negative electrostatic charge pro duced by the charge coron...

Page 51: ...ital signals 4 Printing Latent Image forming Printing is the process of converting image sig nals from the image processor into optical signals and then directing these signals to wards the photosensitive drum via a laser unit This action produces an electrostatic latent image on the surface of the drum Example Light intensity at the CCD photodetector Light Dark Image processor LGC Photo sensitive...

Page 52: ...er Aluminum base Intermediate tones White background Image is not developed by bias potential Bias voltage White background Black solid About Developing Agent Two materials comprise the Developing Agent developer the toner material and the carrier material The toner has a minus negative charge applied to it and the de veloper a plus polarity positive charge Mixing and agitating the carrier materia...

Page 53: ...igure on the right inside the magnetic roller The developer material con tacts the drum forming a brush This is caused by the lines of magnetic force between the South and North poles Lines of magnetic force Magnetic roller Drum Toner Carrier Where toner has settled no frictional electrifica tion occurs N S S rier material Toner which has a minus nega tive charge adheres to the carrier material an...

Page 54: ...n is accomplished shortly after transfer begins Drum Paper Transfer belt 1 Transfer Plus bias is applied to the power supply roller and the transfer belt is charged to have a plus bias This causes an electric field E to form between the transfer belt plus charge and the aluminum layer earth of the drum substrate This in turn polarizes the paper as shown in the figure Tone is transferred to the pap...

Page 55: ...ion and the function of the two rollers accomplish the fixing process of the fusing system Direction of paper movement Upper heat roller Heater lamp Separation claw Pressure Lower heat roller Upper heat roller Paper Pressure 8 Cleaning This process cleans the surface of the drum It also collects the residual toner The following two processes are carried out 1 The fur brush scrapes of excessive ton...

Page 56: ...n charge is placed on the drum surface that will affect the print qual ity of the next copy Double imaging will occur Method A discharge LED array illuminates the entire surface of the drum The drum becomes a conductor and all residual charges will be grounded All electrostatic charges are removed at this time The drum therefore is prepared to take on a new charge Discharge LED array Drum ...

Page 57: ...lied LED red 6560 OD 6560 OPC drum 1 Highly sensitized drum 2 680 V grid voltage 780 V Scolotron system output variable by numerical keypad Variable grid output input 0 to 255 is set up on control panel numerical keypad 1 Automatic exposure 11 step step light control 2 300W halogen lamp Stabilized by regulator bright ness is fixed even if voltage changes None 1 One magnetic roller 2 Magnetic bridg...

Page 58: ...g roller 1 ø33 Cleaning felt roller Cleaning roller 2 ø27 Lower heat roller cleaning felt roller Cleaning roller 3 ø28 Cleaning metal roller Cleaning roller 4 ø29 3 6560 None 1 Blade system brush 2 Non reusable Earth 1 Long life heat roller system Heat roller Teflon coated roller ø60 lamp rating 900W Pressure roller PFA tube roller ø60 lamp rating 250W 2 Heater roller cleaning roller ø18 Cleaning ...

Page 59: ...n lamp is turned OFF Original size indicators are initialized and move to a position indicating the copy area Initialization of the paper feed section Each slot s cassette trays move upward The ADU auto duplexing unit guides move to the maximum size position after their home position is detected Initialization of laser optical system The polygon mirror is rotated The beam position is controlled Ot...

Page 60: ... to rotate Paper reaches the transport roller The paper stop switch of the paper feed tray turns ON After a set amount of time the feed clutch is turned OFF Paper reaches the aligning roller The aligning switch is turned ON and the aligning operation is carried out After a set amount of time the feed roller stops rotating 3 Carriage operation The exposure lamp is turned ON White shading compensati...

Page 61: ...itch detects the passing of the paper s trailing edge The main charger developer bias and discharge lamp turns OFF Operation of the drum transfer belt fuser unit and developer unit stops The fans return to standby mode rotation The copier displays READY and enters the standby mode ...

Page 62: ...gning roller After a set time lag the manual pickup solenoid and LCF motor turns OFF Paper feeding is terminated 4 Same as operation 3 through 6 of automatic feed copying using the START key 4 2 5 Interrupt copying 1 The INTERRUPT key is pressed The interruption LED is turned ON The copying operation is temporarily halted and carriages 1 and 2 return to their home position JOB INTERRUPTED JOB 1 SA...

Page 63: ...TONER BAG B Faults which cannot be cleared without resetting the door switch 1 CLEAR PAPER 2 DEVELOPER UNIT MISLOADING C Faults which cannot be cleared unless the main switch S1 is turned OFF 1 CALL SERVICE 4 3 2 Explanation of faults A 1 ADD PAPER In the case of the copier and PFP cassettes When the cassette is not installed Detects the absence of the cassette tray When the cassette is not instal...

Page 64: ...FF A fixed time later if the tray up switch is not turned ON The tray is The ADD PAPER is displayed regardless not normal of paper being present or not Turning OFF ON the power clears this condition Within a fixed time the tray up switch is turned ON The tray motor stops At this time if the empty switch is ON It is determined there is paper At this time if the empty switch is OFF It is determined ...

Page 65: ... goes OFF A 3 INSERT KEY COPY COUNTER If the key copy counter optional is installed in the copier and is then withdrawn The INSERT KEY COPY COUNTER display appears Copying is not possible If the counter is withdrawn during copying The machine will stop after the paper being copied has exited B 1 CLEAR PAPER Leading edge jam detection by the exit switch E01 The aligning motor is turned ON 1 144 sec...

Page 66: ...After the leading edge of the paper passes the transport rollers if the paper stop switch 1 is not turned ON within a fixed time Paper misfeeding E31 36 During paper feeding from the ADU After the feed clutch is turned ON if the paper stop switch S16 does not come ON within a fixed time Paper misfeeding E53 During paper stacking in the ADU If the ADU jam switch does not detect any paper at the fix...

Page 67: ...l switch will be turned ON REPLACE TONER BAG display When the toner full switch comes ON during copying Copying will stop after the last sheet has exited during copying Clearing method Replace with a new toner bag B 4 Developer unit misloading Disconnection of the developer unit Developer unit loading abnormal is displayed Clearing method Connect the developer unit connector and close the front co...

Page 68: ...BA TEC 4 4 Flow Charts 4 4 1 Power ON to ready YES YES NO Start of initialization A Restart Main switch ON Cover open SCN MTR DCM MTR STOP MTR GUIDE MTR Heater lamp ON NO P STP SW ON NO NO Paper jam YES YES EXIT SW ON ADU JAM SW ON DC power ON E03 ...

Page 69: ... Toner empty Toner full cancel operation T FULL SW ON NO Main motor 6 sec ON Toner replenishment Initialization over 20 sec passed since start of initialization Service call Pre running OFF Heat roller at ready temperature READY YES Service call YES Service call Heater broken YES Polygon motor NG Service call NO NO NO C41 C44 CA1 C26 YES Thermistor broken Heat roller pre running sufficient for fix...

Page 70: ...ON Number of remaining copies 0 Process control end HSYNC OK Process system control Service call Polygon mirror OK CA1 Transfer belt bias ON Transfer belt bias OFF Feed clutch ON Feed clutch OFF Aligning clutch ON Counter ON OFF Scraper solenoid ON Scraper solenoid OFF Aligning clutch OFF Service call Laser OFF B Optical system control Exposure lamp ON Carriage advances Carriage stops Exposure lam...

Page 71: ...570 5570 COPIER OPERATION OK NG B Main charger OFF Discharge lamp OFF Developer bias OFF Drum motor OFF Transfer belt motor OFF Fuser motor OFF Developer motor OFF Standby Exit switch check 2 Drum rotation reversed Paper jam E02 ...

Page 72: ...on selection of each mode LEDs and an LCD displaying the copier state or messages When the operator s attention is needed a graphic symbol lights or flashes and a message indicating that particular condition is displayed in the LCD panel LCD panel indicating operator s attention Arrangement of the control panel HELP 1 2 3 4 5 6 7 8 9 0 C ENERGY SAVER TIMER INTERRUPT COPY PRINTER FUNCTION CLEAR STO...

Page 73: ...becomes 1 and copying is completed Energy saving conditions ADU 1 sided copying standby state Timer OFF No message is displayed in the display panel Timer LED is turned ON Notes The number and reproduction ratio of copies are indicated for example as 0 100 when the main switch comes ON Copy quantity indicator indicates as 1 When a digital key is pressed the set number is indicated The set number i...

Page 74: ...or during copying C in Fig 5 2 1 When it is removed after the pressing of the START key the machine stops after that copy is completed but the counter counts it Indication of need to replace the toner bag Indicated when the toner bag is full D in Fig 5 2 2 The copier stops No Message 7 ADD PAPER 8 ADD TONER 9 SET KEY COPY COUNTER 10 DISPOSE OF USED TONER Solution Supply paper to the selected cas s...

Page 75: ...dicates when an original is jammed in the document feeder D in Fig 5 2 3 Paper jammed in the finisher Indicates when paper is jammed in the finisher E in Fig 5 2 3 Indicates when paper is jammed in the ADU section F in Fig 5 2 3 Solution The machine is returned to normal conditions automatically by pulling the paper out from the bypass guide Press the HELP INFO key and remove the paper jammed in t...

Page 76: ...ion Some part of the mechanism motors switches or sensors is abnormal A in Fig 5 2 4 Indication of PM cycle Indicated when it is time for periodic maintenance and inspec tion Capable of copying Solution Turn OFF the machine remove the cause of the fault and turn the machine back ON Maintenance and inspection by a qualified service technician A ...

Page 77: ... or indication according to the operation Ignores the operation 1 Energy saver condition is released by pressing the Energy saver key or the START key Note Interruption condition is automatically released if the machine is not used for 45 sec 2 Avoid manual insertion during the copying operation since this may result in paper jamming Interrupt key is acceptable during copying operation but not acc...

Page 78: ...n STN black white mode transmissive type LCD with a 320x240 dot display capacity It includes a driver LSI frame print board and lateral CFL backlighting STN Super Twisted 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 79: ...The PROM outputs the data for dis playing the message to the SM CPU 3 The SM CPU writes the data for LCD display to RAM IC41 4 The LCD controller driver IC42 reads the display data from RAM IC41 and outputs the data to the LCD PROM SM CPU GA LCD controller driver R A M scc LED LED LCD KEY CPU Key switches and touch panel PWA F DSP 300 PWA F SYS 300 1 2 3 3 4 4 3 LOAD FRAME LOAD 240 1 2 240 CP x 32...

Page 80: ...anges to L level the transistor is turned ON Also when pin 6 D16 of IC1 changes to L a current flows from 5VL via the transistor to LP1 TIME i e LP1 TIME is turned ON Current LDON0 L L 6 D16 Q3 IC1 7932 R1 TIME 5VL LP1 G Conditions for LED to light 1 The transistor Q2 or Q3 connected to the LED anode is ON 2 The output connected to the cathode of that LED is L The LED comes ON when 1 and 2 above a...

Page 81: ...opier frame 4 Remove the 3 screws fixing the control panel 5 Remove the control panel upwards 6 Disconnect the connector 7 Remove the 5 locking supports and screw 8 Disconnect the 7 connectors and remove the PC board 9 Remove the toothed screw and aluminum sheet 2 places 10 Remove the 4 screws and bracket 11 Remove the 8 screws and LCD board 12 Remove the 9 screws and KEY board 13 Remove the 4 scr...

Page 82: ...rocessing boards Board Number of ASIC Fanction SLG board PWA F SLG 300 1 PLG board 1 PWA F PLG 300 Image processing Print control PLG Image processor Photosen sitive drum System board SYS Image processing SLG Scanner Original Original glass Scanner CCD Semicon ductor laser device Laser drive board LDR Printer Polygonal motor drive board POL LGC board High quality image processing image memory edit...

Page 83: ...ations are performed Data are then sent to the printer section for conversion into light beam that are directed to the photosensitive drum for printing of the latent image The image processing operation is performed by the SLG board PWA F SLG 300 and PLG board PWA F PLG 300 1 Image processing circuit on the SLG board One image processing ASIC is mounted on the SLG board and implement the following...

Page 84: ...aser drive Laser drlve board PWA F LDR 300 Image data flow SYS board PWA F SYS 300 Scanner system image processing ASIC High quality image processing Image memory editing Editing processing Gamma correction Tone processing External output system interface Printer system image processing ASIC Smoothing processing External input system interface Image area control Laser related control Sort copy gro...

Page 85: ...tion of the image processing circuit An ASIC mounted on the SLG PC board implement the functions described below 1 High quality image processing A Range correction This function converts image signals to density range width and corrects it to match each original document s image When copying the images of an original having a certain amount of background such as appear in newspapers it reduces the...

Page 86: ...igh original reproducibil ity The following figure shows the primary scanning pixel is processed by the low pass filter b High pass filter circuit When images with sharp edges are scanned and directed to the CCD the edges of these char acters tend to become dull in appearance This is due to the physical imperfections of the CCD lens as well as the mirrors that direct the light to it To compensate ...

Page 87: ...ror image This function reverses the right side and the left side in the primary direction of the original and this reversed image is output 3 Editing operations Trimming masking and negative positive reversal functions are accomplished a Trimming With the rectangular area signal the image signals inside the rectangular area are left and other image signals are erased b Masking Using the rectangul...

Page 88: ...at image signals are obtained which have input output characteristics matching a particular copying mode 5 Tone processing This function works to process tone so that faithful reproduction of halftone images such as photo graphs are accomplished 6 External output system interface This function performs the output control of the output interface for the SYS board PWA F SYS 300 ...

Page 89: ...ge processing circuit An image processing ASIC of the PLG board works to accomplish the following 1 Smoothing processing This function works to eliminate jaggedness occurring on character edges of images input from the external input system interface for smooth image output 2 External input system interface This function works to control the input interface to the SYS board PWA F SYS 300 3 Image a...

Page 90: ... from Analog signals to Digital signals 4 Shading correction Corrections made by the shading compensation circuit to make up for distortions of images produced by the mirrors and the elements of the CCD See Chapter 7 6 2 6 6 Printer Image signals processed by the PLG board perform the laser writing operation through the writing con trol ASIC and the laser drive board processings 1 Setting of effec...

Page 91: ...electrical signals accomplishes photovoltaic conversion The resultant analog signals undergo A D con version which ultimately become digital signals These signals undergo compensation processes in order to produce the required image Digital signals are then sent to the printer section of image process ing Exposure lamp Reflector CRG 1 CCD drive PC board Rail for CRG 1 Rail for CRG 2 Original glass...

Page 92: ... below shows some of the components that make up the assembly a Exposure lamp The exposure lamp is the light source used for illuminating the original document It is a 180 watt Halogen lamp b Reflector The reflector s purpose is to maximize the amount light being directed to the original document that is emitted by the exposure lamp Carriage 1 c Mirror 1 Mirror 1 is for guiding light reflected fro...

Page 93: ...d as well as the distance that it travels is half that of carriage 1 4 Lens CCD Light reflected from mirror 3 is projected to the CCD The CCD is located at the focal point of a fixed lens 5 CCD drive PC board The Image processing board performs image correction preprocessing amplification mixing A D conversion and shading correction of electrical signals obtained by the CCD Carriage 2 Mirror 2 Mir...

Page 94: ... the base frame for detection of the size of the original without the process of scanning 7 Original width indicator unit The original width indicator unit is for indicating the original width currently selected by the copier The original size is displayed by the yellow lines on the indicator and carriage 1 Copiable length Original indicator unit Carriage 1 Copiable width ...

Page 95: ... 7 3 2 Document motor The document motor positions the original width indicators to indicate the placement position of the original document when the reproduction ratio is changed from its default setting of 100 or when a particular paper size is selected from any of the cassette trays 7 3 3 Optical fan motor The optical fan motors rotate to cool the optical unit during copying and stop rotation d...

Page 96: ...tart frequency is roughly 2 5 times higher than that of 2 phase stepping motors and moreo ver 5 phase stepping motors do not have a resonant range This achieves speed control with a large variable speed ratio without the need for acceleration and deceleration 5 Response is much faster than that of 2 phase stepping motors allowing higher speed setting 6 4 and 5 phase excitation systems achieve exce...

Page 97: ...djacent main poles shift by 0 6 0 5 τR τR 10 with respect to teeth on the rotor cup on the opposite side that are shifted by 0 5 τR Fig 7 4 2 illustrates this relationship Consequently if the polarity of the stator is moved as shown in Fig 7 4 3 the rotor rotates clockwise 1 10th of the rotor tooth pitch at a time Fig 7 4 2 Relationship between Stator Teeth and Rotor Teeth Fig 7 4 3 Movement of Po...

Page 98: ...SCNDIR 0A SCNRST 0A SDATA0 0A SDATA1 0A SDATA2 0A SDATA3 0A H OFF 1A 2C7 2D7 2D7 2D7 2D7 SCNVREFA 3B2 2B7 2C7 1 10W4 7K 1 2 24 3 25 36 35 34 33 32 30 29 28 27 26 A C4 100 25 K 1 2 5 4 A1 A2 D2 K 15 D00 EXTAL U7001S IC4 AZ5301S IC5 TP13 GND DBLC40 GND GND VDD 36V 36V SF12 50 PULSEM VDD 1 2 VDD XTAL CW CK CCW UD RST ISEL DSEL POFF 16 D01 17 D02 18 D03 20 D10 NA PM MO PA PB PC PD PE NB NC ND NE 21 D1...

Page 99: ...re made in the image processing circuit for enhancement of signals 3 Image processing circuit This circuit converts the signals from the CCD into binary values and performs a series of image processing operations such as gamma correction shading correction etc 4 Control panel The duty ratio of PWM signal can be set at increments of 1 through the digital keys by the operator Note The ON OFF switchi...

Page 100: ...ure control circuit has two functions 1 Normal mode The duty ratio of the PWM signal is controlled at 55 lamp voltage 61 25V 2 Check mode Through input from the digital keys the PWM signal output is varied from 30 70 to allow the exposure to be set arbitrarily 7 5 2 Lamp regulator function The figure below shows a typical characteristic diagram Control is performed so that a voltage across the lam...

Page 101: ...vides reference VS for feedback control of the lamp regulator circuit 3 When the oscillator circuit is triggered by EXPO ON OFF signal it generates a lamp drive PWM2 signal which turns on the lamp drive transistor Tr1 causing current I1 to flow through Capacitor C Exposure lamp L Primary side of T1 P Lamp drive transistor Tr1 Capaci tor C This causes current I2 proportional to the winding ratio of...

Page 102: ...it Comparison circuit Integration circuit 5 When the lamp drive transistor Tr1 is turned OFF the counter electromotive force of T1 causes current to flow along Primary winding of transformer T1 P Freewheeling diode D1 Exposure lamp L Primary winding of tranformer T1 P This causes continuous current I3 to flow through the exposure lamp L regardless of the drive transistor Tr1 being turned ON OFF PC...

Page 103: ...umbered image signals are separated into left and right signals and 4 channels are output in parallel Fig 7 6 1 Principle of CCD Photo Voltaic Conversion Transfer area Photosensor area Transfer area Shift register Transfer block Transfer clock Optical energy P layer N layer Detailed photosensor 7 6 2 Shading compensation The following problems affect the voltage values obtained by photo voltaic co...

Page 104: ... the original glass the light emitted by the LEDs is reflected by the original and led to the phototransistor In this way the presence or absence of an original is detected by whether reflected light exists or not Fig 7 7 1 A4 Series LT Series 7 7 2 Original size detection 1 If the copier is set in the original size detection mode the carriage is set at its home position 2 Detection is performed i...

Page 105: ...es LT Series Fig 7 7 3 Sensor Detection Points APS 6 APS 5 APS 4 APS 3 APS 2 APS 1 B5 A5 A5 R B5 R A4 R B4 A3 A3 B4 B5 A4 R B5 R A5 R A5 B5 R B4 B5 A5 A5 R A4 R A3 APS 4 APS 3 APS 1 APS 2 LD LG LT R LT ST ST R LD LG LT R LT ST R ST ST ST R LG LT R LD LT ...

Page 106: ...eep the recognized original size or no original state just before the platen SW is turned on regard less the APS sensor output signal LT Series 4 Original size is determined by a combination of the presence absence of the original at the each locations stated in step 3 Combination charts for size determination of A4 series and LT series are shown below A4 Series 1 beam sensor No APS 1 APS 2 APS 3 ...

Page 107: ...d a phototransistor It detects originals by use of pulse modulation The light emitting diode LED is driven by pulses with a period of 130 msec If a signal which has the same characteristics is received by the phototransistor an original is determined to be present Pulse modulation is performed within the reflecting photointerruptor Original Phototransistor 130µsec LED 8µsec ...

Page 108: ...l glass 2 Tilt the original glass up at an angle 1 and remove in the direction of the arrow 2 B Automatic paper size detector 1 Remove the original glass and move the car riage to the feed side 2 Remove the original width indicator unit 3 Remove the lens cover 11 screws 1 connec tor Glass fix Glass 1 2 Automatic paper size detector unit LT series Automatic paper size detector unit A4 series ...

Page 109: ... the thermo stat from the carriage 2 Release the harness from the terminal and remove the thermostat Note If the thermostat has been used once it should be replaced with a new one because it is designed basically for one time use only Do not push the reset pin to reuse a ther mostat that has been operated once Carriage Exposure lamp Blade Blade Holder Terminal Thermostat Exit side Reflector Lower ...

Page 110: ...ng the document motor remove the 2 screws 6 When removing the belt remove the 2 screws and the cover first 7 When removing the shooting plate board re move the 2 screws leaf springs and glass first F Scanning motor 1 Disconnect the connector 2 Remove the 2 screws and stepped screw then the scanning motor bracket 3 Remove the 3 screws and then the scanning motor Scanning motor Indicator unit Belt S...

Page 111: ...isconnect the power supply cable from the clamp disconnect the connector and remove the earth terminal 1 screw 4 Move the carriage to the feed side 5 Remove each screw fixing carriage 1 on the front and rear 6 Move carriage 1 to the center tilt the entire carriage 1 using the notch on the frame and draw out upwards to remove I Mirror 1 1 Remove carriage 1 2 Remove the 2 leaf springs fixing mirror ...

Page 112: ...ews 2 Remove the top front frame 8 screws 3 Remove the 11 screws 1 connector and the lens cover 4 Remove the 4 screws and disconnect the 7 connectors Then remove the scanner control PC board SLG board 5 Loosen the wire tension bracket and remove the spring 6 Remove carriage 2 Note When assembling carriage 2 adjustment is necessary Hook Spring Carriage wire Front top frame Rear top frame Lens cover...

Page 113: ...e wire refer to the Service Handbook 3 When attaching carriage 1 carriage 2 and the wire adjustment is necessary K Mirrors 2 and 3 1 Remove carriage 2 2 Remove each of the 2 leaf springs Mirror 2 Mirror 3 Motor pulley 39 75 3GT Z28 CRG 1 CRG 2 27 27 Carriage drive wire Wire windup pulley motor deceleration pulley Idler pulley CRG 2 pulley Scaning motor 27 Idle pulley 3GT Z24 7 Remove the shaft cov...

Page 114: ...lacing the lens unit do not touch the fixing screw arrow in the figure 8 points L Lens unit 1 Remove the damp heater 2 Remove the shield bracket 2 screws 3 Remove the 5 screws and disconnect the 2 connectors 4 Draw out the lens unit upwards FG clamp Shield bracket Rear side Front side A Pay attention to the two screws see above figure on the rear side see in the figure A ...

Page 115: ... 25 8070 6570 5570 4580 SCANNER 3 When installing the lens unit lens scal ing adjustment is necessary Refer to the Service Handbook Installation standard Setting holes Mar 2000 TOSHIBA TEC 7 24 1 8070 6570 5570 4580 SCANNER ...

Page 116: ...Remove the original glass and the lens cover 2 Remove the 2 screws and the harness from the clamp and disconnect the connector con nected to the APS harness from the lens cover to remove the fan O Home switch 1 Remove the 2 claws fastening the home switch mounting section on the base to remove the home switch M Upper damp heater 1 Remove the lens cover 2 Remove the 1 screw disconnect the cable fro...

Page 117: ...lective mirrors as well as other optical elements play a role in directing the laser beam to the photosensitive drum The unit should not be disassembled in the field as they are susceptible to dust which would deteriorate the quality of its output Fig 8 1 1 Laser Scanning Overview Rear side Laser diode Lens Aperture Laser drive board fθ2 lens fθ1 lens Half mirror Galvanic mirror Laser unit Cylinde...

Page 118: ...6570 5570 PRINTING 8 2 Mar 1999 TOSHIBA TEC Fig 8 1 2 Laser Optical Unit Overview Feed side Exit side Front side Rear side PLG PCboard ...

Page 119: ...xercised when servicing involves focusing the laser Such operations are hazardous and must not be attempted unless you are specifically trained to work in this area The warning label shown below is attached on the left side of the upper inner cover CAUTION Do not insert tools that are highly reflective into the path of the laser beam Remove all watches rings bracelets etc 2 Galvanomirror Four lase...

Page 120: ...g to separate optical axes the laser beams that are emitted from the four laser units The transmissivity and reflectivity of each half mirror are designed so that the laser power is the same at the point that the four laser beams are combined 1 2 3 4 2 1 4 3 Laser Half mirror 2 Half mirror 1 Half mirror 3 ...

Page 121: ...onal mirror is rotated by the polygonal mirror motor the direction of the reflected laser light moves in sync with mirror rota tion The direction of movement is the pri mary scanning direction of the image with four scans ending in one plane of the po lygonal mirror as four lasers are mounted As the polygonal mirror has eight planes 32 scans are completed in one rotation of the polygonal mirror A ...

Page 122: ... plane of the polygonal mir ror is tilted in either of two directions with respect to the perfect vertical Deviation of the laser light with respect to the perfect horizontal caused by this reflected plane s pyramidal error is compensated 3 Laser beam sectional shape The sectional shape of the laser beam on the drum is compensated 6 HSYNC detection PC board After the laser beams are scanned by any...

Page 123: ...d by tempera ture 2 Laser ON OFF generating function 3 Function for generating synchronizing signals in the primary scanning direction 8 Reflection mirror The mirror reflects and guides laser light reflected by the polygonal mirror onto the drum 9 Slit glass The slit glass is located at the position where the laser beam is output from the laser unit to prevent dust inside the laser unit ...

Page 124: ... constant value APC is also carried out on the bias current when the copier is not printing to improve the optical output rise time due to the temperature characteristics of the laser used in this copier Fig 8 3 2 shows a block diagram of the semiconductor laser control circuit The monitor output from the semiconductor laser is controlled for each of the semiconductor lasers beforehand so that a c...

Page 125: ...rews and remove the scanner section lens cover after sliding the in dicator 4 Disconnect the connector on the system board side of the harness connecting the scanner logic board and system board and remove the cover on the rear side 5 Disconnect the connector on the system board side of the harness connecting the system board and PLG board 6 Remove upper exit cover and open the lower exit cover 7 ...

Page 126: ... the clamp 10 Remove the unit positioning stay 2 screws 11 Draw out the laser unit along the rail paying attention to where you are holding it Note Before you draw out the laser unit make sure that the connectors in step 10 are dis connected Notes 1 Temporarily place the laser unit that you removed with the motor side facing up so that the laser unit is not subjected to a load 2 Take care not to d...

Page 127: ... GLV and section B WH PLG LDR1 to 4 300 2 Turn the laser unit over to its motor side re move the fixing screw on the PLG board and disconnect the connectors at section C WH PLG SNS1 300 and section D WH PLG POL Note During this operation prevent the connec tor at sectionAfrom becoming disconnected A B E D C ...

Page 128: ...EED SYSTEM 9 1 General 9 1 1 Functions This unit feeds paper which is set in the LCF the cassette or the manual feed tray to the transfer position The paper feed section is mainly comprises an aligning section large capacity feeder LCF and paper feed pedestal PFP ...

Page 129: ...B CAM MOT Driven by IC2 LGC PC board TA8428K The block diagram of TA8428K is shown below DI1 and DI2 are input terminals for the signals from the microcomputer In the control logic section forward and backward rotation of the motor is controlled ON and OFF based on the signals from the microcomputer Input DI1 H L H L DI2 H H L L Output M L L H OFF high impedance M L H L Remarks Brake CW CCW STOP C...

Page 130: ...gh phase A will be cut off owing to the disappearance of a flow path At this point however phases A and A will be inductively coupled causing the current from the 24VDC power supply to be diverted through diode DA to phase A in the direction marked X When the currnet flowing in this direction becomes zero current will flow through QA to excite phase A At the instant when QA goes OFF the current wh...

Page 131: ...down position and is removed from the feed roller assembly and thus from the Tray Up Switch The PFC measures the period of time that it takes the Tray Up Switch of each cassette to be actuated turned ON for every time that it is used It does this for every paper feeding operation Obviously the Paper Feed Control Circuit PFC acknowledges the differences in the duration of time it takes for the Tray...

Page 132: ... aligning rollers then rotate to transport paper to the transfer position The aligning rollers are brushed to prevent paper dust from adhering to them 2 Paper stop switch Detects that the leading edge of paper has arrived at the aligning roller It also detects that the trailing edge of paper has passed through the aligning roller In the former case the copier detects that the aligning rollers have...

Page 133: ... bush gear and pin B Upper brush 1 Remove the developer and one brush Fixing screw 2 Remove the upper brush in the direction of the arrow Bush E ring Developer stay Brush fixing screw 2 2 Aligning roller L Paper guide Clip Front side C Lower aligning roller 1 Remove the aligning unit 2 Remove the paper guide 2 screws 3 Remove the spring hooked on the roller end 2 screws 4 Remove the clip on the fr...

Page 134: ... Remove the waste toner transport pipe unit 3 Remove the motor bracket 3 screws Note When installing motor bracket Make sure tat the motor bracket is fastened properly matching the embossed sections for posi tioning shown in the figure on the right 4 When replacing the motor loosen the 2 set screws remove the flange and pulley and then the 3 screws Note When assembling align the cut surface of the...

Page 135: ...switch Note When installing the switch bracket install the switch bracket so that the positional re lationship between the actuator and switch is as shown in the figure on the right G Aligning unit 1 Disconnect the connector on the rear side 2 Remove the developer and the cleaner draw out the belt transport unit and then remove the pin bracket 1 screw Wheel Connector Belt transport unit Aligning u...

Page 136: ...BA TEC 9 9 6570 5570 PAPER FEED SYSTEM 3 Slide the aligning unit to the front side and re move in the direction of the arrow Note When installing the aligning unit prevent the two leaf springs from becoming bent 1 2 ...

Page 137: ...3 Switches Switches detect at the bottom and top positions of the elevator tray and the presence of paper 2 Paper feeding section This unit sends paper which is set in the LCF or the manual feed tray to the aligning section The paper feed secton is mainly comprised of pick up rollers feed rollers separation rollers manual feed switch paper empty switch tray up switch paper start switch and also th...

Page 138: ...wer sheet The following explains the switches for detecting paper presence height of the tray and paper feed ing position to control the respective rollers ON and OFF 4 Manual feed switch Detects if paper is set in the manual feed tray If so manual paper feeding takes priority over cassette paper feeding 5 Paper empty switch This photointerruptor sensor detects paper in the LCF If there is paper i...

Page 139: ...lley Side pulley Guide pulley Belt Rise rotation direction forward direction Tray elevation gear Tray motor Elevator wire front side Elevator tray Elevator tray Elevator wire Wire takeup pulley LCF separation roller LCF pick up roller Tray up switch LCF paper empty switch LCF feed roller Wire fixing stay Tray bottom switch ...

Page 140: ...0 TP30 TP20 TB Z96 P2 TB Z110 P2 TP78 G18 TB Z78 P3 TB Z57 P2 TB Z105 P2 G20 G20 TP20 TP20 TP20 LCF separation roller LCF feed roller LCF pick up roller Manual pick up roller Manual feed roller Manual separation roller Manual pick up solenoid G TP TB Z P Forward rotation Backward rotation Gear Timing pulley Timing belt Number of teeth Pitch mm ...

Page 141: ...This raises the paper up to the level where it feeds efficiently 4 When paper supply runs out in the LCF the empty switch s actuator falls into a hole in the tray s platform When this happens the motor is energized and is made to rotate in the direction that allows the paper tray to lower Simultaneously the LCD panel displays the ADD PAPER symbol The tray motor stops when the LCF bottom switch is ...

Page 142: ...ual pick up roller to also lower When the manual pick up solenoid is de ener gized the pick up bracket is raised by the ac tion of the solenoid s spring that pulls back the lever and thus the pick up roller Pick up bracket Manual pick up roller Spring Lever 1 Manual pick up solenoid 1 Pick up bracket Manual pick up roller 3 2 Pick up bracket Manual pick up solenoid Manual pick up roller Lever 1 ...

Page 143: ... controlled by the tray up switch Paper feed operation manual feed LCF feed Bracket LCF pick up roller Manual feed roller Manual separation roller LCF separation roller LCF pick up roller LCF paper start switch Paper stop switch LCF feed roller Upper aligning roller Lower aligning roller Manual pick up roller Manual feed switch LCF paper empty switch tray up switch LCF large capacity feeder Manual...

Page 144: ...ning rollers The feed motor stops the aligning motor turns and the paper is transported to the transfer proc ess 2 LCF feed When the LCF is installed the LCF pick up roller remains in the lowered position The feed motor revolves in a forward direction and the LCF pick up roller LCF feed roller and LCF separation roller rotate and paper feeding is started The paper presses the paper stop switch and...

Page 145: ...ever if multiple sheet feeding occurs Fig 9 3 2 since the friction between the sheets is small the lower sheet is forcibly separated from the up per sheet and is sent back in the direction of the arrow by the separation roller The Upper sheet is fed in the directino of the arrow by the feed roller Examples If only sheet of paper 1 arrives at the separa tion roller the force of the feed roller whic...

Page 146: ...ver 1 Remove the LCF door 2 Remove the 5 screws C LCF unit 1 Open the right front cover and remove the LCF knob 2 screws 2 Pull the LCF release lever to move the LCF unit toward the arrow in the figure Note Take care not to pinch your fingers 3 Remove the 2 screws each at the front and rear that fasten the LCF unit to the rails LFC unit Rail front side Hinge LCF door LCF feed cover LCF knob LCF re...

Page 147: ...e the LCF front cover 3 Remove the 2 screws and the lowest PFP pa per feed guide 4 Remove the 2 screws and drive bracket 5 Remove the wire winding pulleies front and rear sides from the LCF unit together with the flange 6 Remove the gear claw You can now disassem ble the gear and flange and remove the eleva tor wire LCF unit PFP paper feed guide unit Drive bracket Elevator wire Elevater wire Wire ...

Page 148: ...e elevator wires 1 Judging the elevator wires The longer of the 2 elevator wires is 1 LCF door cover side and the shorter is 2 the LCF paper feed side 2 Taking up the elevator wires Take up the 2 elevator wires 1 2 so that the following relationships are satis fied for each of the four pulleys A to D A B C D 1 Inner side Inner side Lower side 2 Outer side Upper side LCF stay Elevator wire Elevator...

Page 149: ...y motor unit 2 Remove the 3 screws and then take out tray motor Note Always carry this out with the elevator tray lowered If the tray motor unit is removed while the tray is up the tray is in danger of dropping G LCF door switch LCF motor switch 1 Remove the LCF front cover 2 Remove the 2 connectors 3 Remove the 2 screws and the LCF door switch unit 4 Remove the screw the cover bracket and the fas...

Page 150: ...and connector on the tray bottom switch from the tray bottom switch unit You can now remove the switch I LCF switch PFP upper paper stop switch 1 Pull out the LCF unit 2 Remove the handle of front side and guide le ver 1 screw for each 3 Take off the top screw of link and then remove the 2 guides 2 screws for each Bottom switch unit Tray bottom switch Connector Handle Guide lever Guide ...

Page 151: ... the manual pickup roller Then remove the pickup roller K Manual feed roller 1 Draw out the LCF unit 2 Remove the clip of the manual pick up roller 3 Take off the clip of the manual feed roller on the front and then remove the manual feed roller from the holder arm with the shaft L Manal separatin roller 1 Draw out the LCF unit 2 Remove the front paper guide 1 screw 3 Remove the clip and draw out ...

Page 152: ...er 1 Open the LCF door and remove the paper guide 2 screws 2 Remove the clip and draw out the LCF feed roller from the shaft Note The roller can be drawn out more easily from the shaft by pressing the separation roller shaft down O LCF separation roller 1 Open the LCF door and remove the paper guide 2 screws 2 Remove the clip and take the LCF separation roller off the shaft Note The roller can be ...

Page 153: ... the timing belt from the pulley to remove the motor bracket 3 Remove the feed motor 3 screws Q Varistor 1 Draw out the LCF unit and remove the varistor 2 screws Notes 1 When assembling attach the short lead directly to the paper guide 2 Tighten the screws securely R Manual pick up solenoid 1 Draw out the LCF unit 2 Remove the rear paper guide 1 screw Feed motor Paper guide ...

Page 154: ...the paper guide 2 Disconnect the connector take out the screw and then remove the switch bracket 3 Release the 4 hooks from the switch bracket and then remove the manual feed switch T LCF paper empty switch tray up switch 1 Open the LCF cover 2 Disconnect the 2 connectors and remove the screw to remove the switch bracket 3 Unhook the 4 claws to remove the switches Manual pick up solenoid Connector...

Page 155: ... the screw disconnect the connector and remove the switch bracket 4 Unhook the 4 claws to remove the switches V Manual feed tray unit 1 Draw out the LCF unit and disconnect the 2 connectors on the rear side 2 Remove the 2 screws fixing the manual feed tray unit 3 Bring the width guide towards the outside and draw out the manual feed tray unit while press ing the manual pick up roller down Connecto...

Page 156: ...evator mechanism The paper in the cassette is loaded on top of the tray The tray motor can raise tray so that the top sheet of paper in the tray is in the pick up position 3 Paper feed mechanism The paper feed mechanism consists of the pick up roller feed roller separation roller and aligning roller which transport the paper from the cassette to the aligning roller in the copier 4 Switch Switches ...

Page 157: ...ch PFP middle tray up switch PFP middle paper empty switch PFP middle feed roller PFP middle separation roller PFP upper paper stop switch PFP lower paper stop switch PFP middle paper stop switch PFP middle paper start switch Upper aligning clutch Lower aligning clutch PFP lower separation roller PFP upper separation roller PFP lower pick up roller Lower elevator PFP lower feed roller PFP upper fe...

Page 158: ... trays are checked for paper by the above tray movements the copier goes into the ready state In the ready state the trays are left in the lowered position 2 If the cassette is removed and inserted while in the ready state the tray movements are performed to check for paper C From copy start to copy completion 1 When the PRINT key is pressed the copier sets the CRUN copier running signal H and tur...

Page 159: ...et is being fed into the transport mechanism by the PFP When the preceding sheet is stopped the next one is also stopped When the preceding sheet restarts the next one also restarts This maintains a constant spacing between the sheets of paper 9 When copying is complete the copier sets the CRUN signal to L When the CRUN signal goes to L the PFP turns OFF the pedestal motor M31 and starts the PFP t...

Page 160: ...H L H H OFF OFF ON OFF ON OFF OFF ON ON ON ON OFF OFF OFF OFF ON ON ON OFF OFF 0 89 0 90 1 62 1 63 0 89 0 90 1 62 1 63 2 13 2 73 3 05 3 65 5 47 0 88 0 2 20 2 26 4 20 0 88 0 31 0 89 1 32 1 33 1 30 2 02 1 76 1 62 2 14 1 79 2 15 5 48 1 04 1 24 1 32 1 86 2 14 1 59 1 32 1 98 2 13 2 41 2 27 2 81 3 18 3 05 2 20 2 41 3 11 2 68 1 79 1 95 2 61 1 61 1 72 2 43 1 98 2 67 2 80 3 58 Timing chart for feeding two ...

Page 161: ...PMRGT PMRGC PURGT PURGC RSTART brake tray up tray down stop ON ON L L H L H L H OFF OFF ON OFF ON OFF OFF ON ON ON ON OFF OFF OFF OFF ON ON ON OFF OFF 0 91 0 92 1 66 1 67 0 91 0 92 1 66 1 67 2 16 3 08 2 77 3 69 5 52 0 90 4 30 0 2 30 2 35 0 90 0 33 1 07 1 67 1 36 1 35 1 33 2 06 1 84 1 79 2 18 2 19 5 53 1 07 1 27 1 35 1 91 2 18 1 62 2 02 1 35 2 31 2 46 3 23 2 16 2 86 3 08 2 24 2 45 3 16 2 74 1 83 1 ...

Page 162: ...35 are ON when the door is closed it is assumed that there is still paper in the transport mechanism and the jam is not cleared 3 When a jam occurs in the PFP during multiple copying paper fed prior to the jammed paper will be copied normally B Service call 1 If the PFP tray up switch S30 S34 or S38 does not come ON within two seconds of the tray s starting to rise at the following times when the ...

Page 163: ...ed since tray stopped PFP tray motor CW ON Tray lowers Two second delay PFP tray motor OFF Tray stops In the copier s CRUN signal H Door open Standby Branch according to each level s PFP paper empty switch paper empty detection ADD PAPER flashing Only when a cassette with no paper is selected PFP tray motor CW ON Lower tray Two second delay PFP tray motor OFF Tray stop Cassette switch OFF Cassette...

Page 164: ...Paper feed standby PFP tray motor CCW ON Tray rises PFP tray up switch ON Have two seconds passed since the tray started to rise Pedestal motor ON Have 0 3 seconds passed since pedestal motor came ON PFP tray motor OFF PRDY signal goes to H READY 7 PFP tray motor OFF Tray stops Have 0 3 seconds passed since the copier s CRUN signal become H Pedestal motor ON ...

Page 165: ...g period Copier s paper stop switch ON Aligning clutch ON Feed clutch OFF Delay for the aligning period PFP paper stop switch ON PFP paper start switch ON Paper feeding starts Feed clutch ON Paper feeding PRDY signal goes to L BUSY Waiting for paper feeding Paper feeding completed Copying completed CRUN L NO YES NO 9 NO YES NO 9 Have 1 6 seconds passed since feed clutch came ON Jam Leading edge ch...

Page 166: ...copier s RSTART signal L The ON OFF signal for the copier s aligning motor YES Aligning clutch ON PFP paper stop switch OFF Delay from the trailing edge of paper passing PFP paper stop switch PFP paper stop switch off until it has cleared the aligning roller Aligning clutch OFF ...

Page 167: ...Paper feeding standby Paper feeding completed Aligning clutch ON Pedestal motor OFF PFP tray motor CW ON Tray lowers Copying started Copier s CRUN H Have two seconds passed since PFP tray motor CW came ON PFP tray motor OFF Tray stops PFP tray motor OFF 50 msec delay Tray stops ...

Page 168: ...Mar 1999 TOSHIBA TEC 9 41 6570 5570 PAPER FEED SYSTEM YES YES YES NO 9 6 NO Jam All motors and clutches OFF CLEAR PAPER flashing Door open Door closed PFP paper stop switch ON CLEAR PAPER goes OFF NO ...

Page 169: ...roller PFP lower feed roller PFP lower feed roller PFP lower aligning roller Lower aligning clutch Pedestal motor Middle aligning clutch PFP middle separation roller PFP lower separation roller Upper feed clutch Middle feed clutch Lower feed clutch PFP upper feed roller PFP upper pick up roller PFP middle pick up roller PFP lower pick up roller PFP upper separation roller Drive unit G30 G30 G21 G2...

Page 170: ... in the direction of the arrow raising the elevator via the shaft and pushing up the cassette tray Lowering the tray The tray motor rotates in the direction of the arrow Worm wheel 28 and gear 14 rotate in the direction of the arrow Gears 35 15 and 20 rotate in the direction of the arrow Gear 144 rotates in the direction of the arrow lowering the elevator via the shaft and lowering the cassette tr...

Page 171: ...EED SYSTEM 9 44 Mar 1999 TOSHIBA TEC When gear 20 rotates in a CCW direction the spring loosens and gear 15 becomes free As gear 15 becomes free gear 144 is pulled in a CCW direction by its spring lowering the elevator ...

Page 172: ...PFP separation roller is pushed up against the PFP feed roller by the pressure lever connected to spring A At this time the set lever is pushed by the cassette rib and rotates in the direction and is not in contact with the pressure lever With the cassette removed When the cassette is removed the set lever is rotated in the direction by spring B Position D of the set lever pushes up at position C ...

Page 173: ...e lever arm lowering the PFP pick up roller The roller does not lower itself onto the paper in the cassette The cassette switches on the rear side detect whether a cassette is inserted or not Actuators Pick up arm Pick up roller PFP tray up switch PFP paper empty switch Front side Rear side Cassette latch S29 S33 S37 S30 S34 S38 Lever arm Cassette switch Cassette Actuator ...

Page 174: ...per empty switch S29 S33 or S37 If there is no paper on the tray then the actuator enters the hole in the tray only at the position of the actuator and does not reach the PFP paper empty switch detection position indicating that there is no paper If no copy is started the tray is lowered two sec onds after the tray reaches the paper feed posi tion Fig 9 4 1 In the case where there is paper the act...

Page 175: ...e paper is detected by the PFP paper start switch S28 S32 or S36 If the PFP paper stop switch S27 S31 or S35 is ON then the paper stops at this point If the switch is OFF the paper continues When the leading edge of the paper is detected by the PFP paper stop switch S27 S31 or S35 it is aligned by the stationary PFP aligning roller A fixed period of time after the PFP paper stop switch S27 S31 or ...

Page 176: ...le and lower 1 Pull out the LCF unit 2 Slightly draw out the cassettes corresponding to the feed units of each of the top middle and lower cassettes from a loaded state 3 Remove the 2 screws Cassette 4 Pull out the PFP feed unit Note When installing after installing the feed unit put in the cassette There are three PFP feed units upper middle and lower with identical units used for the upper and m...

Page 177: ...nd then remove the rollers from the shafts E PFP aligning roller metallic roller upper and middle 1 Remove the 3 E rings and the gear pin col lar and bushing 2 Remove the opposite E ring and bushing Note When assembling be sure to keep to the mounting direction of the gear and collar as shown below PFP pick up roller PFP pick up roller PFP feed unit Pre separation roller guide Arms Timing belt PFP...

Page 178: ...r 4 When replacing the rubber roller remove the E ring gear and pin Notes Precaution for assembling 1 Spring Front Yellow Rear black 2 Gear mounting direction G PFP paper stop switch upper and middle 1 Remove the pre separation roller guide See Fig C 2 Take off the 2 E rings gear pin and bushing at the rear of the separation roller shaft 3 Pull out the separation roller with its shaft to ward the ...

Page 179: ...ews and then remove the switch bracket 3 Release the 4 hooks from the bracket and then remove the PFP paper start switch I PFP tray up switch PFP paper empty switch PWA F PEM 700 upper middle and lower 1 Remove the PFP feed unit 2 Take out the E ring and bushing then slide the PFP pick up roller unit in the direction of arrow A extract the bushing take off the timing belt from the pulley and then ...

Page 180: ...ctor and then remove PWA F PEM 700 Note When installing the PFP pick up roller unit remember to fit the spring in position J PFP upper aligning unit 1 Pull out the LCF unit 2 Remove the 2 screws and pull the PFP upper aligning unit out to the paper feed side Switch cover PFP tray up switch Connector PFP paper empty switch Spring ...

Page 181: ...n remove the rubber roller 3 When replacing the rubber roller remove the E ring gear and pin Notes Precaution for assembling 1 Spring Front Yellow Rear Black 2 Gear mounting direction M PFP tray motor upper middle and lower 1 Remove the PFP inner cover 2 Remove the harness from the harness clamp unnecessary for the upper tray 3 Disconnect the connector 4 Remove the motor bracket 3 screws PFP upper...

Page 182: ...the setscrew holding the clutch O Pedestal motor 1 Remove the rear cover 2 Disconnect the connector and then remove the 2 screws P Cassette switch upper middle and lower 1 Remove the rear cover 2 Unhook the 2 switch claws from the cassette rail disconnect the connector and then remove the cassette switch Aligning clutch Spring Feed clutch Bracket Pedestal motor Cassette switch connector PC board T...

Page 183: ...rt 4 Remove the spring from the waste toner trans port pipe 5 Disconnect the feed clutch aligning clutch and cassette switch connectors 9 connectors 6 Disconnect the pedestal motor connector 7 Remove the harness from the 3 harness clamps 8 Remove the 8 screws and draw out the PFP drive unit towards you to remove Aligning clutch Spring Feed clutch Bracket Pedestal motor Cassette switch connector PC...

Page 184: ...on of the parts is as follows Drum Main charger Ozone filter unit Slot exhaust exhaust fan motor Discharge LED Main charger wire cleaner Main charger Discharge LED Transfer belt Drum Transfer belt cleaning brush Recovery auger Lower damp heater Lower damp heater cover Transfer belt follower roller Transfer belt separation auxiliary roller Transfer belt drive roller ...

Page 185: ...rged using the principle of corona discharge 3 Charger wire cleaner The charger wire cleaner moves backwards and forwards to clean the charger wire after the power is turned ON and after more than 2000 continuous copies have been made since the door switch is turned ON or from the previous cleaning operation 4 Discharge LED Discharge refers to the process of reducing or eliminating the electrostat...

Page 186: ...nector from the drum ther mistor 3 Remove the thermistor bracket 1 screw 4 Rotate the cam until it locks 5 Remove the 2 drum shaft fixing screws 6 Draw out the drum shaft from the front side 7 Remove the drum by lifting it up B How to replace the drum 1 Remove the drum 2 Remove the 3 screws Thermistor bracket Connector Drum thermistor Drum Cam ...

Page 187: ...UM 10 4 Mar 1999 TOSHIBA TEC 3 Remove the front flange 4 Draw out the drum upwards Drum C Main charger 1 Remove the middle inner cover 2 Remove the screw and draw out the main charger to the front side Front flange ...

Page 188: ...ation Precautions 1 The charger wire must be inserted into the V grooves at both the front and the rear 2 Do not allow the charger wire to be twisted Grid cover Grid Main charger Terminal main charger Wire terminal Small Wire terminal Large Wire cleaner Charge wire Spring V groove V groove Charge wire Terminal Remove the grid cover Charge wire V groove 3 Do not touch the charger wire directly with...

Page 189: ...nd faces of the main charger wire cleaner base and switch pusher aligned with the center of the mark 2 During assembly the tension of the tim ing belt must be adjusted as follows Tighten the screw securing the tension pulley so that the timing belt is pulled by 4 to 5 mm when a force of 200g is applied at the mark Pad Charger wire Wire cleaner Mark Timing belt 200g S 4 to 5mm Rear side of belt fro...

Page 190: ...in charger guide unit 2 Remove the connector and remove the charger cleaning motor unit 2 screws 3 Remove the motor 2 screws I Main charger cleaning switch 1 Disconnect the 2 connectors and remove the screw Note When installing the switch press in the di rection of arrow A and secure Also insert the harness into the terminals paying attention to the color and bend the terminals to an angle of 45 C...

Page 191: ...r 2 Draw out the discharge LED K Ozone filter 1 Remove the upper exit cover 2 Unlock the claw lock turn the knob and draw out the ozone filter 3 Remove the ozone filter from its holder L Ozone filter unit 1 Disconnect the 2 connectors remove the 2 screws and remove the ozone filter unit Ozone filter Connector Ozone filter ...

Page 192: ...emove the slot exhaust fan duct 2 screws 3 Remove each of the 2 screws Note When installing the slot exhaust fan motor and the exit fan motor install in the direc tion shown in the figure N Reversal Fan Motor 1 Open the exit door and draw out the ADU unit 2 Remove the reversal fan motor bracket 2 screws connector Connector ...

Page 193: ...6570 5570 DRUM 10 10 Mar 1999 TOSHIBA TEC 3 Remove the reversal fan motor from the bracket 2 screws Note Attach the reversal fan motor in the direc tion shown in the figure ...

Page 194: ...e fuser unit Belt transport unit Transfer belt unit Transfer belt support power supply mechanism High voltage transformer Transport guide Transfer belt cleaning mechanism Belt transport unit lock unlock mechanism Lower damp heater unit Copier rear frame Transfer belt drive mechanism Transfer belt contact release mechanism Belt transport unit simple lock mechanism ...

Page 195: ...ified by a plus voltage by dielectric polarization the paper is held in contact by static electricity and the processes of transfer separation and paper transport can be carried out continuously 5 After printing ends the transfer belt is separated from the photosensitive drum and stands by again Figure 1 shows a sectional view of the belt transport unit Fig 1 Belt transport unit sectional view Tra...

Page 196: ... The cleaning mechanism has two functions a function for scraping off residual toner from the belt surface by the cleaning blade cleaning brush and recovery auger and a function for bringing the transfer belt into contact with and separating it from the drum 4 Cleaning blade After the paper is separated remove any paper scraps and foreign objects remaining on the belt surface 5 Cleaning brush Remo...

Page 197: ... when the main power switch is turned OFF Standard accessories TWD SAD ASD AUD Options Other than the above 10 Transfer belt drive unit Drive is transferred from the transfer belt motor travels via the timing belt and the relay gears and is transmitted to the transfer belt drive gear to rotate the drive roller Drive is transmitted to the belt transport unit via a gear having a planetary joint 11 T...

Page 198: ... the 2 stepped screws blue 4 Lift up the belt transport unit holding it by both grips Note When installing the belt transport unit on the slide rail firmly insert the stepped pin on the slide rail into the notch on the belt trans port unit B Transfer belt unit 1 Remove the inner cover 2 screws 2 Disconnect the transfer belt power supply con nector the cleaning brush power supply con nector and the...

Page 199: ...bly fasten the screws in or der 1 2 and 3 2 When assembling the transfer belt unit make sure that the front lever of the trans fer belt unit fits under the cam on the front frame C Transfer belt 1 Rotate the transfer belt support power supply mechanism inside the transfer belt unit by 90 and then draw out upwards 3 2 1 2 Remove the 2 fastening screws from the drive roller support bracket Front fra...

Page 200: ...ar on the cleaning section from being turned over D Transfer belt power supply roller 1 Remove the transfer belt 2 Remove the 2 stop rings on the power supply drive roller shaft 3 Remove the 2 holders and 2 springs 4 Draw out the power supply roller temporarily to the front remove the rear side shaft and re place the power supply roller Notes 1 When replacing the power supply roller take care not ...

Page 201: ... the front Notes 1 When installing the gear install so that the projection on the inner diameter of the gear shaft fits firmly into the groove on the shaft 2 When the bush in the nozzle side comes off securely install it with care of the di rection 3 Do not directly touch the surface of the brush with your hands F Cleaning blade 1 Remove the transfer belt support and power supply mechanisms from t...

Page 202: ... the cam motor and sensor 5 Remove the 2 screws align the cam with the holes on the copier rear frame and draw out the unit towards you I Transfer belt contact separation sensor 1 Remove the transfer belt contact separation cam drive unit 2 Disconnect the connector from each of the sen sors 3 Remove the sensor pins from the bracket holes to remove the sensor Notes 1 When replacing the sensor pay a...

Page 203: ...ame 6 Make sure that the damp heater connector is inserted into the rear side of the fuser unit Notes 1 When installing the damp heater cover prevent the harness from becoming nipped 2 Before installing the lower damp heater unit check the power voltage M band Locking support J Mounting the lower damp heater 1 Remove the transfer belt unit 2 Remove the transport guide 1 screw 3 Attach the lower da...

Page 204: ...n When a fine power toner that has a charge of the same polarity as the electrostatic latent image and color black or other color comes near the electrostatic latent image formed on the drum surface the toner adheres to the image only by electrostatic force causing the electrostatic latent image to be devel oped resulting in a visible image being formed This is the developing process performed in ...

Page 205: ... has a weight ratio of about 5 of the developer material Developer material deteriorates with use and must be replaced periodically 2 Mixing unit When the carrier and toner are mixed friction is generated causing the carrier to have a positive charge and the toner to have a minus charge The toner adheres to the drum surface as a result of electrostatic force 3 Supply recovery paddle This paddle su...

Page 206: ...es sweeps the surface of the photosensitive drum enabling development 5 Leveler This regulates the amount of developer material transferred by the transport roller so that the mag netic brush correctly comes into contact with the surface of the photosensitive drum 6 Separation auxiliary member This member supports the task of separating the developer material on the lower developer sleeve 7 Auto t...

Page 207: ...gnet 2 There is a magnetic sensor toner empty switch on the outside of the toner hopper such as when the amount of toner in the hopper drops the sensor lever lowers which is detected by the magnet sensor The copier then requires toner to be added 3 The left figure above shows the sensor lever lifted by the toner 4 The right figure above shows the sensor lever down due to lack of toner and the magn...

Page 208: ...Unit Drive Rear side Front side Input gear G27 Rear paddle gear G31 Lower magnetic roller gear G17 Upper magnetic roller gear G17 Idle gear G24 Idle gear G20 Mixer 2 gear G45 Mixer 1 gear G45 G24 Drum Transport roller gear G23 Idle gear G19 Front paddle gear G18 Drum ...

Page 209: ...e gear P25 G25 Copier rear side drive Mixer 2 G45 Idle gear G24 Idle gear G20 Lower and upper magnetic rollers G17 Mixer 1 G24 G45 Paddle Drive input gear G27 Rear side gear G31 Front side gear G18 Developer unit Rear side Idle gear G19 Transport roller G23 Front side Developer Unit Drive ...

Page 210: ...M M M M M M M M M M M M Hall voltage Hall element A Hall element B Hall element C U V W W W N N V V U U S S Hall elements Hall element Equivalent Circuit of Motor Winding Structure of IC Motor Rotor Stator Shaft Motor winding A B C 1 2 N N S S N N N N N N N N S S S S S S S S N N N N S S S S N N N N S S S S N N N N S S S S N N S S N N N N S S S S 30 30 30 30 30 U V 60 V W 180 V U 150 W U 120 W V 90...

Page 211: ...the FG pulse and the reference frequency from the LGC are compared and the differences are added Further to this are added the fluctuations in the power supply voltage Signal generation 7 Changes the switching timing for the excitation phase switching unit to match the signal amount obtained in step 6 That is the FG pulse and reference frequency are controlled to be equal The developer motor rotat...

Page 212: ...clock is 821 2Hz When the cycle of 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 LP1 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 of motor circuit Signal H level L level DEVCK Reference clock 821 2H...

Page 213: ...collector of Q40 at its side When PH4 TNRMT signal of the gatearray becomes L level Q29 is turned on Q1 is turned on The 24V power supply supplies current to Q1 via the motor winding the motor rotates When TNRMT signal becomes H level Q29 is turned off Q1 is tuned off The current which was flowing in the motor winding flows via the route of diode D1 It decreases at the rate of the time constant de...

Page 214: ...r circuit Auto toner sensor Detects toner density Control section Control to maintain the toner in the developer material at a constant specific density Toner motor Replenishes the toner in the developer material Display unit Displays the toner empty status Toner empty switch Toner Display Toner density signal Developer unit Control voltage signal DA converter IC15 MB88347 A04 Developer material T...

Page 215: ...pty situation inside toner hopper Drives toner motor auto toner sensor output is not changed the toner density does not change judges that there is no toner toner empty Release of toner empty situation Toner supply driving the toner motor auto toner sensor output changes returning of toner density of normal value toner empty release 2 Mechanism of auto toner sensor The auto toner sensor is compose...

Page 216: ...le Magnetic resistance small detection output large auto toner output VATS large When the toner density is high Iron powder carrier in the developer material little Toner in the developer material much Magnetic resistance large detection output small auto toner output VATS small DC voltage corresponding to toner density in the developer material auto toner output VATS ...

Page 217: ...he developer unit slide lever counterclockwise 3 Disconnect the 1 connector 4 Pull the developer unit toward the front B Developer material 1 Remove the developer unit 2 Remove the top cover 2 screws 3 Completely remove the old developer material while rotating the gear on the rear side plate Connector Developer unit Developer unit Top cover ...

Page 218: ... 5 Rotate the gear several times to distribute the developer material evenly 6 Install the top cover Note When installing the top cover position it securely on its hooks and be sure not catch the urethane seal Developer material Urethan seal Top cover Seat of topcover Mylar of sideframe ...

Page 219: ...en assembling the upper and lower guide roll ers C Guide roller 1 Remove the developer unit 2 Remove the developer unit handles 2 screws Handle Guide roller Bias connector E ring Gear Bias plate Upper guide roller White Lower guide roller Black E ring 3 Remove the E ring and then the spring 4 Remove the 2 E rings and both the front guide rollers from the magnetic roller shaft Note Pay attention to...

Page 220: ...s and the 2 E rings on the inside D Developer magnetic roller 1 Remove the developer material 2 Remove the E ring and then the spring 3 Remove the front guide rollers 4 Remove the front side plate 3 screws Front side plate Magnetic roller holder Magnetic roller Magnetic roller holder Magnetic roller Pole fixing holder 5 Remove the 2 fixing screws on the front mag netic roller holder 6 Remove the r...

Page 221: ...ic rollers E Transport magnetic roller 1 Remove the upper and lower developer roller sub unit 2 Remove the front gear and the E ring 11 Remove the 2 E rings and 2 gears 12 Remove the magnetic roller holders from the front and the rear sides Magnet roller holder Gear E ring Shield bush Scraper Seal Seal Transport roller E ring Gear 10 Remove the 2 pushers Pusher E ring ...

Page 222: ...s G Auto toner sensor 1 Remove developer material 2 Remove the auto toner sensor 2 screws 3 Remove rear side screw and then the trans port roller and pole fixing bush 4 Remove the front side bearing and transport roller F Leveler 1 Remove the top cover 2 Remove the 2 screws and then the leveler Transport roller Pole fixing bush Auto toner sensor Leveler Leveler Convex part of sideframe ...

Page 223: ...fter removing the 2 bearings with the C ring pliers remove the 2 oil seals 3 Remove the 2 screws and draw out the nozzle mixer 4 Remove the 2 E rings and 2 bushes Nozzle mixer Oil seal Nozzle mixer E ring Bush Bearing Oil seal H Oil seal mixer section 1 Remove the rear side plate 2 Remove the 2 E rings and 2 gears Gear E ring ...

Page 224: ...ar and par allel pin Notes Assembling the oil seal 1 Push the new oil seal in parallel to the mounting holes of the developer frame or the nozzle mixer Pay attention to the direction that the oil seal is assembled See figure on right 2 Apply a uniform coating of grease to the inside surface of the oil seal Amount 2 large drops Grease Alvania No 2 3 Wipe off any surplus grease that oozes out from i...

Page 225: ...ansport roller 1 Remove the 2 sealed bushes on the rear side from the upper and lower developer rollers 2 Remove each of the oil seals pressure fitted into the sealed bushes on the front and rear sides 3 Remove the transport roller Oil seal Rear paddle bush Front paddle bush Oil seal Top Bottom Paddle bush rear side E ring Paddle bush front side E ring 3 Remove the E ring and then the rear paddle ...

Page 226: ...e hooks and then lift the rear side up at an angle to remove 4 Remove the oil pressure fitted into the front side frame Note The oil seal installation follows the descrip tion in previous item H K Toner hopper unit 1 Remove the rear cover and right top cover 2 Disconnect the connector Oil seal Connector Toner hopper unit Toner hopper unit ...

Page 227: ...ector and remove the toner empty switch N Toner supply cover switch 1 Remove the switch cover 1 screw Toner empty switch Connector Toner motor Motor bracket Connector Toner motor L Toner motor 1 Remove the toner hopper unit 2 Disconnect the toner motor connector 3 Remove the motor bracket 3 screws 4 Remove the toner motor 2 screws Switch cover ...

Page 228: ... motor unit 3 screws 2 Disconnect the connector and remove the toner supply cover switch O Toner transport auger unit 1 Remove the upper feed cover 2 Remove the developer unit 3 Remove the toner hopper unit 4 Draw out the large capacity feeder 5 Remove the 2 screws Toner transport auger unit Motor unit Developer bias connector Connector Duct Toner supply cover switch Connector ...

Page 229: ...lapping the toner filter unit seal If there is a clearance between the duct and seals toner may be blown out and dirty the inside of the copier Connector Toner filter unit Harness clamp Toner filter fan Developer motor Connector Connector Developer switch 4 Remove the developer motor 2 screws Q Developer switch 1 Remove the right inner cover and the devel oper unit 2 Disconnect the connector and t...

Page 230: ...he 2 screws and the panel cover 4 Draw out the fan T Replacing toner filter 1 Remove the feed cover 2 Remove the screw and the filter cover S Laser fan unit 1 Remove the cover behind the hopper 2 screws 2 Remove the 3 screws and disconnect the con nector Connector ...

Page 231: ...6570 5570 DEVELOPER UNIT 12 28 Mar 1999 TOSHIBA TEC 3 Draw out the toner filter ...

Page 232: ...sts of a driver section cleaning section waste toner carry section fur brush toner adhesion amount sensor separation claw toner full switch and toner bag G16 G15 G25 G17 30 Separation claw Toner adhesion amount sensor Toner recovery auger Fur brush Weight Main blade Drum thermistor Recovery blade Drum ...

Page 233: ... auger unit 4 Toner bag Toner scraped off by the main blade is carried by the toner recovery auger and recovered to the toner bag via the waste toner carry auger unit 5 Toner full switch When the toner bag becomes full of recovered toner its weight causes both the toner bag and actuator to drop and the toggle switch to be turned OFF 6 Separation claw To separate paper that could not be separated b...

Page 234: ...e is detected to control the drum surface charge to a constant value 9 Fur brush Removes paper dust and foreign matter remaining on the drum surface after separation of the trans fer paper reduces blade wear lengths the blade life and improves image reliability 2 Spring Toner full switch 1 Toner transport auger Toner bag The weight of the toner pulls the toner bag down against the spring in direct...

Page 235: ...crocomputer and as the main charger control signal 2 High voltage transformer for the main charger control output unit Input voltage B connected to pin No 2 of operation amplifier IC2 via R11 is compared with reference voltage E that is applied by the divided voltage of R3 R2 and R1 amplified and is output from output terminal pin No 8 This output voltage is input to the A D converter of the micro...

Page 236: ...e detection results to minimize changes in density caused by changes in the operating environment 13 4 2 Principle of sensor operation Toner adhesion amount sensor This sensor emits light onto the drum and onto the toner image test pattern developed on the drum and outputs a voltage corresponding to the reflected light intensity Toner adhesion amount The relative reflectivity is calculated from th...

Page 237: ... 6 3 The test pattern is exposed 4 The value of the toner adhesion amount sensor is read 5 The result is judged Control judges whether or not the toner adhesion amount of the test pattern is within the permissible range When the result is judged as GOOD 7 End of Control The determined image formation conditions are reflected in subsequent copies When the result is judged as NG No Good 6 The image ...

Page 238: ...intensity control voltage Laser optical system Exposes the test pattern for forming the toner image A D converter Converts the voltage values output from the sensor to digital values before they are read Image formation system Executes the charging exposure and developing processes MCPU Executes steps 1 to 7 described in 13 4 3 Reflected light intensity signal Light source intensity signal Image F...

Page 239: ...tes 1 The cleaner unit is heavy Take care not to drop it 2 When installing the cleaner unit make sure that the cleaning unit gear is en gaged with the gear on the rear of the toner auger motor pulley before you se cure it B Main blade 1 Remove the drum 2 Remove the top cover 4 screws 3 Holding the bracket turn the main blade over 4 Remove the screw 5 Hold the ends of the 2 screws remove the main b...

Page 240: ...ecovery blade press the edge of the recovery blade against the stepped section of the cleaner frame and fix at point A making sure that there is no gap D Fur brush 1 Draw out the support shaft knob of the fur brush in the direction of the arrow to set the fur brush to a free state 2 Remove the fur brush from the cleaner body Recovery blade Fur brush A Recovery blade Drum surface Cleaner casing E T...

Page 241: ...ctor and remove the 2 mounting screws 2 Remove the E ring and remove the cam 3 Slide the separation claw unit to the front side to draw it out from the bushing on the rear side and draw out the unit to the rear Cam Separation claw unit 1 2 F Separation claw 1 Remove the cover 2 screws Cover ...

Page 242: ...ews securing the bracket and the reinforcement plate disconnect the connec tor and bundling band The motor can be re moved as an individual unit 4 Remove the toner auger motor 2 screws and bundling band Thermistor bracket Connector Drum thermistor Reinforcement plate Bracket Toner auger motor 4 Remove the 3 screws and draw out the 2 sepa ration claws from the shaft together with the stopper and pa...

Page 243: ... belt 3 Remove the toner auger motor 4 The solenoid unit can be removed when the 2 unit mounting screws on the rear frame are re moved from the front side 5 Remove the separation claw solenoid 2 screws connect bundling band Note During assembly move the separation claw solenoid in the direction of the arrow and secure J Drum motor 1 Remove the flywheel 3 screws Solenoid Connector Bunding band ...

Page 244: ...he 3 screws and remove the harness from the edge saddle Note When installing the motor pay attention to the position of the harness with respect to the metal plate K Toner bag 1 Remove the 2 coin screws and open the toner bag 2 Draw out the toner bag L Toner full detector 1 Remove the toner bag 2 Disconnect the toner full detector connector 3 Remove the screw on the bracket securing the toner full...

Page 245: ...r unit 1 Remove the 5 screws securing the toner trans port auger unit 2 Disconnect the transport auger motor N Toner transport motor 1 Remove the toner transport motor 2 screws Note Adjustment of the main blade recovery blade and fur brush cleaner unit is not necessary ...

Page 246: ...m the heat roller motor at a constant pres sure applied by spring force The upper heat roller has two built in heater lamps and rotates by motor drive The built in heater lamps do not rotate The upper and lower heat rollers are pressu rized by spring force at all times After fusing is completed the transfer paper is separated smoothly from the upper and lower heat rollers by the separation claw In...

Page 247: ...he lower heat roller is pressed against the upper heat roller by springs 4 Separation claw The upper and lower separation claws separate paper affixed to the upper and lower heat rollers 5 Cleaning roller 2 A cleaning roller 2 is attached so as to contact the upper heat roller to clean the toner that has stuck to the upper heat roller during the fusing process This roller contains silicon oil that...

Page 248: ...r heat roller No 2 thermistor end section The temperature distribution of the upper heat roller sometimes differs greatly at the center section and end section in the lengthwise direction depending on the printing conditions The No 2 thermistor detects the temperature at the end section This thermistor controls the temperature so that the heater lamp turns OFF when either of the values detected by...

Page 249: ...after the power has been turned ON if the thermistor output voltage does not exceed 0 078 V CALL SERVICE C41 is displayed 2 Abnormal detection during stand by copying If the thermistor output voltage decreases to and remains at 0 078 V or lower for 500 msec or more CALL SERVICE C43 is displayed 3 Thermistor status counter control For improved fuser unit safety the CPU works as follows After a C41 ...

Page 250: ...ked 2 Relationship between the output voltage and the fusing temperature 200 C corresponds to approx 2 5V and 0 25 V corresponds to approx 40 C 3 Relationship between heat roller surface temperature and thermistor 1 resistance Temperature Thermistor resistance Heater lamp state Less than 200 C More than 0 8 kΩ ON 200 C 0 8 kΩ Maintains previous status More than 200 C Less than 0 8 kΩ OFF 4 Tempera...

Page 251: ...n 160 C Copying discontinues and waiting for standby to resume copying 160 170 200 Heater lamp ON OFF ON OFF ON ON ON ON ON ON ON ON Copying speed A4 LT 0 0 0 0 0 80 80 80 65 65 65 C Heat roller temperature distribution Warm up Standby 200 C Standby Copying Copying Waiting for standby Reference supplement The following fusing control mode is available only for 8070 Relationship between the upper h...

Page 252: ...8070 6570 5570 4580 FUSER UNIT 14 6A Mar 1999 TOSHIBA TEC ...

Page 253: ... abnormal temperatures are detected by the respective thermistors First thermistor 230 C Second thermistor 270 C 2 Error codes C44 Displayed when keys C 8 are pressed simultaneously at the time of Call Service Counter value 9 Displayed when you input 400 in the setting mode 3 Machine condition After de energizing all outputs heater lamp exposure lamp control panel displays motors etc the microcomp...

Page 254: ...e 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 heat roller motor runs at a constant speed Locked range state 8 When the HTRMOT signal changes to H level the he...

Page 255: ...L signal LGC MOT Input This signal switches low speed heat roller motor rotation ON OFF When the signal is L the heat roller rotates at a low speed 3 HTRMOT ON signal LGC MOT Input This signal is the heat roller motor ON OFF control signal When the signal changes to L the heat roller motor is turned ON Signal level of motor circuit Signal H level L level HMOT REF Reference clock 1247 6Hz HTRMOTL M...

Page 256: ...ontally to remove Note The fuser unit must be held by holding the handles on the front and rear sides Replacement of parts on the fuser section is described assuming that the fuser unit has been removed B Cleaning roller 1 2 1 Remove the fuser front cover and the rear cover 2 screws 2 Remove the fuser unit guard 3 screws Belt transport unit Fuser unit guard Front cover Rear cover Cleaning roller 2...

Page 257: ...ermistor connector and re move the 3 harness clamps 4 Remove the 2 upper thermistor brackets 1 screw for each 5 Remove the thermostat bracket 1 screw 6 Remove the thermostat 2 screws Notes 1 When assembling make sure that the thermostat is attached as shown in the figure on the right Shaft Front side Thermistor connector Thermostat bracket Drawer connector Clamp E ring E ring E ring E ring Gear 22...

Page 258: ...l ers from becoming scratched Wind pa per onto the heat rollers as shown in the figure on the right D Lower thermistor 1 Remove the harness cover 1 screw 2 Remove the lower thermistor 1 screw E Upper separation claw 1 Remove the jam release unit 1 screw on the front side Paper Harness cover Lower thermistor Jam release unit ...

Page 259: ... the E ring on the shaft Before the copier is shipped from the factory the E ring is at the center groove 3 Remove the spring and upper separation claw Note The spring is attached in the direction shown in the following figure F Lower separation claw cleaning roller 4 1 Remove 1 screw for each from the front and rear sides and open the lower separation claw unit Spring Separation claw Lower separa...

Page 260: ... 2 Disconnect the 2 connectors from the front heater lamp 3 Remove the drawer connector bracket 1 screw 4 Remove the rear lamp bracket 1 screw 5 Disconnect the 2 connectors from the rear heater lamp 6 Draw out the 2 heater lamps Notes 1 When attaching the 2 heater lamps make sure that they are attached with the TOSHIBA marks facing the front Lower separation claw Spring Cleaning roller4 Connector ...

Page 261: ... or other marks H Upper lower heat roller and cleaning roller 3 1 Remove the fuser unit guard and jam process ing unit 2 Draw out the 2 heater lamps 3 Completely loosen the 2 screws fixing the pres sure springs 4 Remove the front handle bracket 1 screw 5 Remove the front stop ring and gear 6 Remove the 2 front screws and take out the bearing 7 Remove the timing belt 8 Remove the rear stop ring and...

Page 262: ...e lower heat roller Wind paper onto the lower heat roller in the same way when installing the lower heat roller 12 Open the lower separation claw unit 2 screws 13 Open the lower inlet guide unit 2 screws 14 The cleaning roller 3 opens together with the lower inlet guide The cleaning roller 3 is at tached to the lower inlet guide unit via the spring 9 Remove the rear handle bracket 2 screws 10 Remo...

Page 263: ...cratch the thermistor 4 Make sure that the screws of the pres sure springs are firmly fastened 2 loca tions When thin paper is frequently used and paper frequently wrinkles loosen these screws to adjust 5 If paper jams occur frequently in the fuser or paper frequently wrinkles make ad justments referenced to the markings lower inlet guide on the 2 screws I Exit roller 1 Remove the front and rear s...

Page 264: ...er 2 screws 2 Disconnect the connector 3 Release the claw from the bracket and remove the exit switch K Heat roller motor 1 Remove the rear cover 2 Remove the rear side cover 3 Remove the connector cable bracket 2 screws Stop ring Gear Pin Handle Screw spring Claw Connector Stop ring Stop ring Screw Spring Pin Pin Bush Gear Handle Stop ring Bush Front side Rear side Connector cable bracket ...

Page 265: ... then remove the heater fan duct in the direction of the arrow 3 Remove the rear side cover 4 Remove the connector cable bracket 2 screws 5 Disconnect the motor connector Connector Connector cable bracket Connector Connector Heat roller motor Heat roller motor PC board 4 Disconnect the connector from the heat roller motor PC board 5 Remove the motor 3 screws ...

Page 266: ...fan motor must be as shown in the figure on the right 6 Remove the motor bracket 1 screw M SSR for the upper heater lamp 1 Remove the protective cover 3 screws 2 Disconnect the 4 connectors and remove each of the 2 screws to remove the SSR Note Wiring is as follows Heater fan Thin wire Thick wire Yellow Black 16A 8A Blue Transparent connector Yellow connector White White Blue White Blue ...

Page 267: ...ADF The ADU comprises the following mechanisms 1 ADU exit switching gate This gate is for guiding paper output from the fuser to the ADU During one sided copying and after double sided copying is completed the movement of this gate guides copy paper to the copy tray 2 ADU inlet reversal roller This roller is for guiding the paper to the stack section from the gate During the reversal exit opera ti...

Page 268: ...A Mar 1999 TOSHIBA TEC Exit roller Fuser Drum Holding gate ADU inlet reversal roller Stack section Transport guide Transport roller Pick up roller Feed roller Aligning roller Separation belt Aligning roller ADU exit switching gate ...

Page 269: ...on When the gate solenoid turns OFF the arm returns to its original position arrow 3 by spring force and the copied paper is out put A A Holding gate Inlet reversal roller Forward rotation clutch Reverse rotation clutch Drive motor Feed clutch Aligning clutch Aligning roller Feed roller Separation belt Pick up roller Transport clutch Transport roller 3 2 1 Mar 1999 TOSHIBA TEC 15 3A 8070 6570 5570...

Page 270: ...nce with the size of the selected paper to move the paper trailing edge guide to the specified posi tion 15 2 3 ADU inlet reversal roller drive When the forward rotation clutch turns ON the in let roller rotates in the direction forward rotation for feeding paper to the stack section of the ADU When the reverse rotation clutch turns ON the in let roller rotates in the direction reverse direction f...

Page 271: ... ADU feed roller and ADU pick up roller rotates The ADU separation belt rotates by the gear on the ADU feed roller in the direction opposite reverse direction to that of the ADU feed roller 15 2 6 ADU aligning roller drive When the ADU aligning clutch turns ON the ADU aligning roller rotates 15 2 7 ADU transport roller drive When the ADU transport clutch is turn ON the ADU transport roller rotates...

Page 272: ...d rotation clutch and the paper is fed further into the stack section When the paper enters the stack section it is temporarily stacked on the holding gate receiving section and the paper is stacked between the pick up roller and the holding gate as the holding gate rotates At the stack section the paper is stacked with the copied side facing down This operation is repeated until the specified num...

Page 273: ...ligning roller is detected by the position detector switch located in the transport section and stops temporarily at the transport section initial alignment operation When paper stacking ends the paper that has been initially aligned is fed to and aligned by the aligning roller of the copier and copies are made on the side opposite to the initially copied side Paper that has been copied on both si...

Page 274: ...ligning switch detects the leading and trailing edges of the paper passing through the ADU aligning roller It is also used for detecting paper jams 3 The ADU position detection switch 1 and ADU position detection switch 2 switch detect the leading and trailing edges of the paper passing through the ADU transport roller They are also used for detecting paper jams Mar 1999 TOSHIBA TEC 15 8 8070 6570...

Page 275: ...let guide by During this operation the leading edge of the paper is detected by the reversal switch and the inlet reversal roller rotates in the forward direction to transfer the paper to the ADU stack section When the paper passes through the reversal gate and the trailing edge of the paper passes the reversal switch the inlet reversal roller rotates in the reverse direction by the reverse direct...

Page 276: ...otation knob and then remove the rotation knob 3 Remove the 3 screws fixing the ADU front cover 4 Remove the upper guide cover fastened by the stop ring A 2 Removing the ADU feed cover 1 Remove the 2 screws fixing the ADU feed cover B Stack guide unit 1 Remove the 6 screws fixing the stack guide unit 2 Disconnect the connector 3 Remove the stack guide unit Stop ring Upper guide cover A 2 A 2 3 3 2...

Page 277: ... Remove the stack guide unit 2 Disconnect the connector and remove the 2 screws 3 Remove the 2 screws fixing the length guide motor and then remove the length guide mo tor 4 Disconnect the connector and release the switch claw from the bracket to remove the length guide switch E Stack empty switch position detection switch 1 1 Remove the stack guide unit 2 Disconnect the connector and release the ...

Page 278: ...de unit 4 Remove the 2 screws fixing the clutch guide and then the clutch guide Note When returning the clutch guide to its origi nal position make sure that the protrusion on the clutch is fitted into the notch on the clutch guide 5 Remove the set screw fixing the transport clutch and disconnect the connector Then remove the transport clutch F Pick up roller guide unit 1 Remove the stack guide un...

Page 279: ...nt E ring and bush 3 Remove the 3 screws fixing the rear connector bracket and then remove the connector bracket 4 Remove the rear E ring pulley pin and belt 5 Remove the E ring and bush and then the transport roller The transport roller 1 and 4 are same parts K Transport switch 2 1 Turn the ADU unit cover 2 Disconnect the connector and release the switch claw from the bracket to remove trans port...

Page 280: ...h and aligning clutch Note The gear on the feed clutch side is Z32 and the hear on the aligning clutch side is Z22 N Feed roller 1 Remove the ADU front cover 2 Remove the stack guide unit 3 Remove the pick up roller guide unit 4 Remove the ADU drive unit 5 Remove the transport clutch guide 6 Remove the front E ring and bush L ADU drive unit 1 Disconnect the 2 connectors 2 Remove the 5 screws fixin...

Page 281: ...n belt gear drive unit 12 Remove the E ring pick up gear drive unit and pin O Aligning roller 1 Remove the ADU front cover 2 Remove the stack guide unit 3 Remove the pick up roller guide unit 4 Remove the ADU drive unit 5 Remove the transport clutch guide 6 Remove the front E ring and bearing 7 Remove the rear E ring gear black and pin 8 Remove the E ring and bearing ...

Page 282: ...ed switch bracket 3 Disconnect the connector and release the switch claw from the bracket to remove the feed switch Q Aligning switch 1 Remove the ADU feed cover 2 Disconnect the connector and release the switch claw from the bracket to remove the aligning switch Feed switch Aligning switch 7 Remove the rear E ring gear white and pin 8 Remove the E ring and bearing ...

Page 283: ...emove the ADU feed unit 2 Remove the 2 E rings 2 screws and then the feed drive unit Color black black white white white black R ADU feed unit 1 Remove the ADU front cover 2 Remove the ADU feed cover 3 Remove the transport clutch holder 4 Disconnect the 5 connectors and release the harness from the feed unit 5 Remove the 2 E ring from the front side of the fulcrum shaft fixing the ADU feed unit Ma...

Page 284: ...everse rotation clutch and then remove forward rotation clutch and reverse rotation clutch T Holding gate solenoid 1 Remove the ADU feed unit 2 Remove the feed drive unit 3 Remove the screw fixing the holding gate sole noid to remove the holding gate solenoid E ring 3 Remove the 2 E rings 2 screws and bracket 8070 6570 5570 4580 ADU 15 18 Mar 1999 TOSHIBA TEC ...

Page 285: ...nt springs and rear springs 2 each 9 Remove the front E ring and take out the bush 10 Remove the rear E ring and take out the bush U inlet reversal roller rubber roller plastic roller 1 Remove the ADU feed unit 2 Remove the feed drive unit 3 Remove the E ring gear and pin 4 Remove 2 screws for the transport guide u E ring Pin Transport guide u E ring Bush 1 2 Spring E ring Mar 1999 TOSHIBA TEC 15 ...

Page 286: ...ush and bracket 6 Remove the E ring slide the bush from the bracket and then remove the separation belt roller Remove the 2 E rings and remove the drop roller E ring collar gear pin 4 E ring 5 E ring 5 Bush 5 Bush 4 Bush Separation belt roller E ring E ring Drop roller E ring 11 Slide the inlet reversal roller plastic roller to the front and take it out 1 2 Separation mounting bracket Mar 1999 TOS...

Page 287: ...ischarge brush X Holding gate 1 Remove the ADU feed unit 2 Remove the feed drive unit 3 Remove the E ring and clutch unit 4 Remove the 2 front E rings each of the 2 gears and pins 5 Draw out arm F to the front side 6 Remove the 2 rear E rings each of the 2 gears and pins 7 Draw out arm R to the rear side Note For reassembling refer to the service hand book 1 15 2 Holding gate position adjust ment ...

Page 288: ...it unit 2 Remove the spring from the arm and the screw fixing the link to the arm Note When assembling take care not to tighten the screw fixing the link to the arm too tight 3 Remove the rear clip and bush 4 Slide the ADU exit switching gate to the front and remove it Clip Gate Holding gate 8070 6570 5570 4580 ADU 15 22A Mar 1999 TOSHIBA TEC ...

Page 289: ...te solenoid Then remove the gate solenoid AA Reversal gate 1 Open the exit unit 2 Remove the E ring fixing the reversal gate Then remove the arm spring and bush 3 Slide the reversal gate to the rear and remove it AB Exit roller 1 Remove the exit cover 2 Remove the rear E ring and slide the bearing to the inside of the frame 3 Slide the exit roller to the rear and remove the bearing from the frame ...

Page 290: ...ove the 3 screws fixing the drive motor bracket and then the drive motor bracket 4 Remove the 2 screws fixing the ADU drive motor and then the ADU drive motor Transport reverse roller Assembly of clutch and solenoid connector As the clutch and solenoid connector have the same shape it is possible that they may contact with each other Using the following figure and list carry out the assembly after...

Page 291: ...frame and then take out the transport reversal roller 4 Remove the E ring from the transport reversal roller and bush and replace the transport re versal roller AD ADU drive motor 1 Remove the main unit rear cover 2 Disconnect the connector 3 Remove the 3 screws fixing the drive motor bracket and then the drive motor bracket 4 Remove the 2 screws fixing the ADU drive motor and then the ADU drive m...

Page 292: ...als after they exit the original glass It comprises a transport belt and rollers for driving the transport belt 3 Original exit reversal section This section outputs originals onto the exit tray after copying is com pleted When making copies in the double sided mode the original is guided to the reversal section where it is turned over The original is then fed to the original glass again The origi...

Page 293: ...ller Control section Electrical part ADF feed motor ADF aligning sensor ADF timing sensor ADF empty sensor ADF size sensor ADF feed cover switch ADF transport motor ADF open switch ADF fan motor ADF reverse motor ADF reverse solenoide Exit sensor ADF exit cover sensor PC board Document feeder unit consists of feeding section includes the original feeding tray transport section reverse includes exi...

Page 294: ...exing mode and the following conditions I The solenoid turns ON when trailing edge of the first original is passed the timing sensor II The solenoid turns ON when transport of the original is restarted after reversal of the original is stopped III The solenoid turns ON when transport of the second original is restarted after the first original is exited and transport of the second original is stop...

Page 295: ...iew 1 Pick up roller stops 2 Feed roller stops 3 Aligning roller rotates CCW 4 Weight goes up 5 Transport belt rotates CCW 6 Exit roller rotates CCW 7 Reverse roller rotates CCW Stop Lock Free Rear side Front side 3 2 4 5 6 8 7 1 Feed motor Transport motor Reverse motor Stop ...

Page 296: ...gnal is set Then the feed motor starts operating in the reverse direction the feed roller is rotated the weight plate is lowered and initial alignment is started At the same time the transport motor and reversal motor start to operate in the forward direction the transport belt and reversal roller rotate and the dummy exit operation is started After the alignment sensor detects the leading edge of...

Page 297: ...rt of original transport to aligning sensor OFF detection of scan size After completion of dummy exit the feed motor and transport motor start to operate in the forward direction and the aligning roller and transport belt rotate to start transport of the original standing by at the initial alignment position to the exposure position At this time detection of the scan size is started From the secon...

Page 298: ...motor stops is set 6 Setting the original at the exposure position completion of feed The original stops signal is set by the set timing of the original stop signal After the timing sensor detects the trailing edge of the original the original is transported for a speci fied number of pulses At the point when the original arrives at the exposure position the feed motor stops the original is set at...

Page 299: ...setting the original at the exposure position completion of feed When the feed signal is received the initial alignment signal is reset feed of the original standing by at the initial alignment position is started the same processes from 4 to 8 are carried out and the original is set at the exposure position When the exit signal is received during feed of the 2nd original onwards the DF operation ...

Page 300: ...l is drawn out and output as it is If the output original has not been nipped by the specified amount or more the original is not drawn out and output In this case output of this original is carried out when the next original is fed 10 Start of exit deceleration At the point when the number of drive pulses up to start of exit deceleration set in 9 has been counted deceleration of the reversal moto...

Page 301: ...belt and reversal roller rotate to start exit operation and the original on the original glass is transported to the exit section At the point when the exit sensor turns ON the number of drive pulses up to start of exit deceleration is set At the point when the number of pulses is counted up decelera tion of the transport motor and reversal motor is started and the original is output at low speed ...

Page 302: ... motor rotates in the reverse direction to rotate the feed roller lower the weight plate and start initial alignment operation After the aligning sensor turns ON and the leading edge of the original is detected the original is transported for a specified number of pulses and the leading edge of the original arrives and is aligned at the aligning roller The feed motor then stops At the same time th...

Page 303: ...d However note that if the original exit operation was in progress at this time dummy exit operation is completed at the point when the exit operation of this original is completed 4 Start of original transport to aligning sensor OFF detection of scan size After completion of dummy exit the feed motor and transport motor start to operate in the forward direction and the aligning roller and transpo...

Page 304: ...N to switch the reversal flapper over to the reversal side When the exit operation is in progress the transport stops after being driven for a specified number of pulses The original being feed pauses before the reversal section and stands by for exit opera tion to complete After the exit sensor turns ON and the leading edge of the original is detected the original is trans ported for a specified ...

Page 305: ...stop notice signal The original top side rear side signal is set or reset at the point when the exit sensor detects the trailing edge of the original The original stop signal is set at the set timing of the original stop signal At the point when the trailing edge of the original has passed the reversal flapper the flapper sole noid turns OFF and the reversal flapper is switched to the exit side 8 ...

Page 306: ...riginal is trans ported for a specified number of pulses At the point where the leading edge of the original is nipped by the reversal roller lower passage roller by a specified amount or more the transport motor and the reversal motor stop 10 Start of reversal to flapper solenoid OFF After forward rotation transport is completed the transport motor starts to rotate in the reverse direc tion and t...

Page 307: ...ext original is started The same processes as 2 and 3 are carried out initial alignment of the next original is completed and the original stands by When initial alignment is carried out on the 2nd original onwards the dummy exit operation is not carried out If there is no original on the tray operation from 21 is started 13 Start of feed to aligning sensor OFF When the feed signal is received the...

Page 308: ...of forward rotation transport After the timing sensor turns OFF the original is transport for a specified number of pulses and the feed motor stops at the point when the original being fed arrives at the specified position before the reversal section The original stands by until exit of the output original is completed The number of drive pulses up to start of exit deceleration is set at the point...

Page 309: ... motor stop 18 Start of reversal to flapper solenoid OFF After forward rotation transport is completed the transport motor starts to rotate in the reverse direc tion and the reversal motor starts to rotate in the forward direction to rotate the transport belt and reversal roller to start reversal of the original The original passes along the reversal path and is transported onto the original glass...

Page 310: ...nal the DF operation in progress signal is set Then the transport motor and reversal motor start to operate in the forward direction the trans port belt and reversal roller rotate to start exit operation and the original on the original glass is transported to the exit section At the point when the exit sensor turns ON the number of drive pulses up to start of exit deceleration is set At the point...

Page 311: ...ADF to copier DF ACK Communications request answer signal copier to ADF ACK Communications request answer signal ADF to copier TXD Data sent from the copier to the ADF RXD Data sent from the ADF to the copier Data communications RXD TXD between the copier and the ADF is carried out by serial communica tions So you cannot check whether or not signals are being sent or received correctly in the fiel...

Page 312: ...alignment position is set as the jam pulse This is set when transport from the initial alignment position is started 4 Timing sensor accumulation jam 1 Up to timing sensor OFF from aligning sensor OFF The number of pulses equivalent to twice the distance from the aligning OFF position to the timing sensor OFF position is set as the jam pulse 16 5 2 Transport section jams 1 Turn guide sensor non ar...

Page 313: ...set at the point when the trailing edge of the output original has arrived at the exit sensor during original exit 2 From start of reversal operation to exit sensor OFF in the double sided mode The number of pulses from start of reversal operation reverse rotation of the transport belt to com pletion of feed in the double sided mode is set as the jam pulse When the exit sensor turns ON at completi...

Page 314: ... original size in the width direction is judged by the size width sensor As it is difficult to judge A4 horizontal and letter size horizontal and also A3 and LD by detection in the feed direction and width direction alone as described above two sensors are provided to detect A4 horizontal and letter size horizontal The number drive pulses output by the feed motor between 1 and 2 is counted to dete...

Page 315: ... Parsing of port input General purpose timer count processing Sensor adjustment E2PROM control Initialization over Status change monitoring Initialization processing Operating status monitoring Operation control Jam processing Communications control ADF unit test mode ADF unit test mode control General purpose timer set processing ...

Page 316: ...eration control RETURN Operation control Initial alignment One side feed control No 1 double sided transport control No 2 double sided transport control Double sided reversal control Eject control Dummy exit control Weight plate initialization control ...

Page 317: ... ON Jam pulse cleared Setting of feed motor deceler ation request by aligning sensor ON interrupt deceler ation started after specified pulse drive Feed motor OFF Timing sensor OFF Setting of jam pulse from start of feed motor forward rotation to timing sensor ON Feed motor reverse rotation started Timing sensor ON Jam pulse cleared Setting of feed motor deceler ation request by aligning sensor ON...

Page 318: ...rotation started 2 originals on glass Number of originals number of output originals Deceleration of all motors started Aligning sensor OFF Aligning sensor non arrival jam Timing sensor non arrival jam Jam pulse cleared Setting of jam pulse from aligning sensor OFF to timing sensor OFF Timing sensor OFF Jam pulse cleared Feed motor deceleration started Setting of transport motor deceleration reque...

Page 319: ... jam pulse from aligning sensor OFF to timing sensor OFF Timing sensor OFF Jam pulse cleared Feed motor deceleration started Original exiting Setting of transport motor deceleration request by timing sensor OFF deceleration started after specified pulse drive Transport motor stopped Exit completed Flapper solenoid ON switchover to reversal direction Setting of jam pulse from restart of No 1 double...

Page 320: ...to reversal direction Setting of jam pulse from start of No 2 double sided transport to exit sensor ON Transport motor forward rotation started Reversal motor forward rotation started Exit sensor ON Jam pulse cleared Setting of transport motor reversal motor deceleration start request by exit sensor ON interrupt deceleration started after specified pulse drive Transport motor and reversal motor st...

Page 321: ...ied pulse drive motor stopped Transport motor reverse rotation started Reversal motor forward rotation started Exit sensor OFF Setting of pulse up to flapper solenoid OFF by exit sensor OFF Flapper solenoid OFF at pulse count up switchover to exit direction Transport motor and reversal motor stopped All motors stopped Double sided reversal control END Transport motor and reversal motor stopped Exi...

Page 322: ...ration start pulse at exit sensor ON Pulse count up Reversal motor deceleration started to exit deceleration speed Exit sensor OFF Jam pulse cleared Output original present Exit sensor ON Setting of jam pulse from exit sensor ON to reversal sensor OFF Setting of reversal motor deceleration request at exit sensor OFF deceleration started after specified pulse drive Reversal motor stopped Exit contr...

Page 323: ...ment started No 2 double sided transport started double sided transport of original on platen Double sided transport ompleted Double sided reversal started Initial alignment completed Double sided reversal completed One sided feed started Exit started One sided feed completed Double sided mode No No One sided mode No Front side setting progress No The second original onwards Exit started 2 origina...

Page 324: ...d Initial alignment completed Exit completed Operating status monitoring Feed signal received First copy Initial alignment started Dummy exit started Initial alignment completed and dummy exit completed Double sided mode Exit signal received Back side setting in progress No 2 double sided transport started double sided transport of original on platen Double sided transport completed Double sided r...

Page 325: ...1 42 1 42 0 45 0 45 1 18 0 69 0 0 28 0 0 22 0 66 0 94 0 73 0 29 0 75 0 83 0 83 0 82 1 27 0 44 0 54 0 54 0 54 0 26 0 38 0 72 0 75 1 09 1 21 1 14 0 60 0 31 ON OFF ON OFF ON OFF OFF ON OFF ON ORG IN ORG OUT DF ACT ORG STP PRE FED Feed motor CW OFF CCW CW OFF CCW Transport motor Reverse motor Aligning sensor Timing sensor Exit sensor Empty sensor Exposure time Exposure time Exposure time Exposure time...

Page 326: ...1 1 31 0 54 0 99 1 44 0 54 0 54 0 99 0 26 0 89 1 26 0 37 0 92 1 38 0 36 0 38 0 14 0 14 0 69 0 69 0 34 ON OFF ON OFF ON OFF OFF ON OFF ON ORG IN ORG OUT DF ACT ORG STP PRE FED Feed motor CW OFF CCW CW OFF CCW Transport motor Reverse motor Aligning sensor Timing sensor Exit sensor Empty sensor Exposure time Exposure time Exposure time differents with the machine type or the feed original mode ...

Page 327: ...2 0 86 0 91 0 0 41 0 0 43 1 14 0 89 0 45 0 75 1 40 1 46 0 0 67 0 89 1 34 0 0 66 0 31 0 72 0 43 0 74 1 03 1 29 1 26 0 18 1 35 0 20 0 30 0 30 0 30 0 30 0 47 0 55 0 47 1 01 1 27 0 56 1 71 1 00 1 00 ON OFF ON OFF ON OFF OFF ON OFF ON OFF ON ORG IN ORG OUT DF ACT ORG STP PRE FED Feed motor CW OFF CCW CW OFF CCW Transport motor Reverse motor Aligning sensor Timing sensor Exit sensor Empty sensor Flapper...

Page 328: ... 97 0 54 0 45 0 45 0 54 0 92 1 60 0 0 0 66 0 97 0 97 1 59 1 69 0 73 0 0 0 62 0 92 0 26 0 89 1 04 0 37 0 91 1 46 1 53 1 63 1 21 0 35 1 10 0 37 0 14 0 14 0 14 0 14 0 68 0 68 0 56 1 10 1 52 0 56 ON OFF ON OFF ON OFF OFF ON OFF ON OFF ON ORG IN ORG OUT DF ACT ORG STP PRE FED Feed motor CW OFF CCW CW OFF CCW Transport motor Reverse motor Aligning sensor Timing sensor Exit sensor Empty sensor Flapper so...

Page 329: ...ginal on the original tray Semiconductor optical sensor REGS REG SNS aligning sensor Detects the original for aligning Semiconductor optical sensor TIM TIM SNS timing sensor Detects the initial alignment position of the original Semiconductor optical sensor SIZES1 SIZE SNS1 size sensor 1 Original width sensor 1 Semiconductor optical sensor SIZES2 SIZE SNS2 size sensor 2 Original width sensor 2 Sem...

Page 330: ...S Sensor input circuit Communications circuit 5V power circuit Driver Driver RSOL CPU ROM Control board D A converter EEPROM FMOT FAN TMOT RMOT Rush current limiting circuit DF ACK DF REO REO CNT RXD SGND TXD SGND ACK DC 24V 24V 5V ADF PPC APS STR SW DF OPN SW RCOVER SW FCOVER SW EXIT SNS SIZE SNS2 SIZE SNS1 TIM SNS REG SNS EMPS REGS TIM EXITS FCOVER RCOVER OPN APSSW SIZES2 SIZES1 Driver ...

Page 331: ... on IC5 compares the signal voltage of pin 6 reversal input terminal with the reference voltage input to pin 7 no reversal input terminal If the voltage of pin 6 is higher output pin 1 of IC5 turns Low Alternatively if there is little amount of light incident to the PTr that is there is an original the voltage of pin 6 of IC5 becomes low and as a result pin 1 of IC5 turns High R15 C30 and C31 NF2 ...

Page 332: ...by the time con stants of R38 and C45 base current is supplied to Q2 to set Q2 to an ON state and Q3 turns This allows the current that was flowing through PTH1 to flow through Q3 and cancels the current limitation Discharge resistor R7 immediately extracts the load that accumulates in C39 C40 and C41 when one of the ADF open close switch feed cover switch and exit cover switch becomes open The ci...

Page 333: ...nt value is set by dividing the D A converter output voltage by R73 and R59 and inputting the resultant voltage to pin 12 Vref of IC8 The motor current value can be set to any value by varying the D A converter output value 16 10 5 Solenoid drive circuit This circuit limits actuation and release of the reversal solenoid When the CPU output port is Low level pin 3 of IC3 turns Low and pin4 of IC3 t...

Page 334: ... causes the 5V voltage to fall below 4 2V pin 8 of IC3 turns Low to reset the CPU and stop system operation During normal operation a fixed cycle clock is input to pin 3 CK of IC3 and IC3 s built in watchdog timer is cleared If a system error prevents the clock from being input from the CPU pin 8 of IC3 turns Low to reset the CPU and stop system operation Resistor R27 is for stopping the watchdog ...

Page 335: ... and is High when data transactions are in progress Pin 2 CLK of IC11 is the serial clock terminal and is sent synchronized with the clock that is input to this terminal Pin 3 DI of IC11 is the serial data input terminal and pin 4 DO is the serial data output terminal IC11 is powered by 5V from E2PROM IC11 power is held by D11 R74 and C42 until writing of data is completed even if something causes...

Page 336: ... CPU output port is the same CN1 3 REQ CN1 9 ACK CN1 7 TxD 3 5V DA3 R90 R30 C46 IC2 1 IC3 5 TP23 TP19 REQ1 REQ1 ACK2 K 3 2 2 2 2 2 1 1 1 1 1 1 11 10 1 SGND SGND SGND A 9 5V DA1 R92 R32 C48 IC2 3 IC3 4 ACK2 K 3 2 2 2 2 6 1 1 5 1 9 8 1 A 7 5V DA2 R91 R31 C47 IC2 2 IC3 1 TP21 DF RxD K 3 2 2 2 2 4 1 1 1 3 1 1 2 1 A A Y A Y A Y A Y A Y A Y CN1 1 DF ACK 5V R87 R20 R52 IC2 6 TP18 ACK1 ACK1 3 2 2 2 2 1 1 ...

Page 337: ...SGND NF2 07 C E 2 1 1 24 B 3 R16 1 2 1 2 1 1 1 1 1 2 1 2 2 1 2 12 13 IC4 4 IC5 2 R36 1 2 2 1 C17 R44 2 1 1 2 7 6 1 R43 R45 REG REG AD REGS DA CN6 4 5V CN6 5 DTS CN6 6 DTSLED R60 TP32 TP34 4 C32 C33 R82 5V 5V 5V R85 5 6 3 1 1 2 2 SGND SGND SGND SGND SGND SGND NF4 08 C E 2 1 1 28 B 3 R18 1 2 1 2 1 1 TP33 1 1 1 2 1 2 2 1 2 10 9 IC4 3 IC5 1 R64 1 2 2 1 C18 R47 2 1 1 2 5 4 2 R46 R48 DTS DTS AD DTS DA C...

Page 338: ...ef 16 11 5 Solenoid drive circuit diagram When the CPU output port is Low level Q12 turns ON to actuate the solenoid The solenoid drive signal is a PWM signal When the solenoid starts to actuate the solenoid actuates at its maximum torque at 100 duty After actuation is completed the duty ratio is reduced to hold actuation while heating of the solenoid is held in check TP2 TP3 TP4 TP5 TP6 2 1 1 2 2...

Page 339: ...24V power to the drive circuit The voltage of CN6 and CN7 becomes 0V when all three switches are ON When one of the switches turns OFF the voltage of CN6 and CN7 becomes 24V CN6 7 DFSW CN6 8 DFSW1 CN5 4 DFSW1 CN5 5 DFSW2 CN7 1 DFSW2 CN7 2 PGND R34 1 2 1 2 1 2 PGND DC24V 24V TP17 1 3 4 1 5 2 RY1 K A C37 D2 7 8 4 5 1 2 ADF open SW Feed cover SW Exit cover SW ...

Page 340: ...nit 2 Push down the top of the transport unit front side and remove the rear side from the belt drive section Note During assembly insert the clips and fix the transport unit at the position shown in the figure B Transport belt 1 Remove the transport unit 2 Loosen the screw front fastening the belt ten sion plate Belt Transportt unit Clip ...

Page 341: ...e the feed side belt tension roller after removing the feed side drop roller Replace the exit side belt tension roller with the belt tension plate brought down The drop roller need not be removed Notes 1 When the belt tension roller is replaced is replaced do not remove the transport unit side frame Do not remove the side frame fixing screws except when replac ing the side frame 2 The belt tension...

Page 342: ...ws and slide the origi nal feeding tray to the front to remove E Feed unit 1 Remove the original feeding tray 2 Remove the rear cover 3 Disconnect the 2 connectors and remove the earth lead 1 screw and harness band 4 Remove the 2 screws and slide the ADF unit to the rear side and light up to remove Brush Original feeding tray Connector ADF unit ...

Page 343: ... over and remove the cover 3 screws M4 x 8 6 Disconnect the 4 connectors from the PC board 7 Open the jam release cover and loosen the screw 8 Remove the 6 screws and the feed unit Note M4 x 12 4 pcs M4 x 8 1 pc A M3 x 6 1 pc B harness guide Cover Jam release cover ...

Page 344: ...ove the motor connector and 2 motor fix ing screws Note During assembly be sure to fasten the belt tensioner last of all G Jam release cover 1 Remove the feed unit 2 Remove the jam release cover by removing the 2 screws front and rear sides Note To assemble be sure to insert spring wash ers to fasten the jam release cover Front side Rear side Feed unit Spring Jam release cover ...

Page 345: ... plate 1 Remove the feed unit 2 Open the jam release cover 3 Remove the 2 screws J Aligning roller L 1 Remove the feed unit 2 Open the jam release cover 3 Remove each of the E rings bushes and coil springs from the front and rear sides 4 Slide the aligning roller L to draw out the roller K Timing sensor and size sensor 1 Remove the feed unit 2 Remove the 4 screws Spring Separation unit Leaf spring...

Page 346: ...e the inlet guide 3 Remove the E ring bush and spring from the front side 4 Remove the front side plastic ring fastening the feed roller and draw out the roller from the front frame opening M Pick up roller aligning roller R 1 Remove the feed unit Pick up roller 2 Remove the inlet guide 3 Remove the front side E ring and bush 4 Remove the plastic ring fastening the roller and draw out the roller E...

Page 347: ...e 2 E rings from the frame inside and draw out the roller N Transport motor 1 Remove the 2 screws and 1 connector O Reversal unit 1 Remove the ADF unit 2 Remove the transport unit and cover 3 Disconnect the 2 connectors from PC board 4 Remove the earth lead fastened to the hinge section 5 Remove the screw from the harness guide 6 Remove the 5 screws and the reversal unit Pulley Reverse unit ...

Page 348: ...ersal unit 2 Remove the screws from the front and rear sides and remove the cover Q Reversal motor Disconnect the connector and remove the 2 screws R Reversal roller 1 Remove the reversal unit 2 Remove the stay 2 screws Exit cover 3 Remove the E rings from the front side ...

Page 349: ...ile tilting it on its side from beneath the unit S Exit sensor 1 Remove the stay 4 screws 2 Remove the sensor from the guide 1 screw T PC board 1 Remove the ADF unit 2 Remove the cover 3 Disconnect the 11 connectors 4 Remove the 2 screws and slide the PC board from the hooking section on the rear side to remove Reverse roller Stay Exit sensor 4 4 ...

Page 350: ...Mar 1999 TOSHIBA TEC 16 59 6570 5570 ADF U ADF fan motor 1 Remove the PC board 2 Disconnect the connector and remove the screw 3 Remove the 2 screws Connector ...

Page 351: ... first clean the fixing position with alcohol After fixing the mylar sheet make sure that it is not rising up and the ends of the sheet are not peeling up 1 Jump mylar sheet feed guide A A 0 Feed guide Fixing reference Clearance 0 to 0 5mm when pushed up against this line Jump mylar sheet F i x i n g r e f e r e n c e c l e a r a n c e 0 t o 0 5 m m e n d f a c e r e f e r e n c e A A cross sectio...

Page 352: ...ixing reference Clearance 0 to 0 5mm when pushed up against this rib Feed cover mylar sheet Fixing reference Clearance 0 to 0 5mm when pushed up against this rib F i x i n g r e f e r e n c e C l e a r a n c e 0 5 m m r i b e n d f a c e r e f e r e n c e a a cross section b b cross section Fixing reference Clearance 0 to 0 5m m when pushed up against this rib ...

Page 353: ...ence 0 to 1 Feed sheet 5 Feed sheet 5 Feed sheet 1 Fixing reference when pushed up against this indented section Feed sheet 4 Sheets 4 and 5 must be fixed according to the rib contact reference in the direction of the arrows shown in the figure on the left Overlapping of ribs is not allowed Clearance must be 0 to 2mm ...

Page 354: ...site side must be fixed at the same Fixing reference C C cross section Guide mylar sheet 2 locations Mirror mylar sheet Mirror seal B B cross section mirror seal Fixing reference Clearance 0 to 0 5mm when pushed against end face mirror mylar sheet Fixing reference Clearance 0 to 0 5mm when pushed against end face mirror seal Fixing reference Clearance 0 to 0 5mm when pushed against end face Fixing...

Page 355: ...r e f e r e n c e C l e a r a n c e 0 t o 0 5 m m w h e n p u s h e d a g a i n s t t h e c u t o f f s e c t i o n Fixing reference Deviation 0 to 0 5mm protrusion not allowed protrusion also not allowed on opposite face 0 Fixing reference C learance 0 to 0 5m m w hen pushed against end face Weight holder Weight mylar sheet Fixing reference Deviation 0 to 0 5mm protrusion not allowed protrusion a...

Page 356: ...o 0 5mm overlapping not allowed Guide mylar sheet 2 3 locations Fixing reference Clearance 0 to 0 5mm overlapping not allowed Fixing reference Clearance 0 to 0 5mm when pushed against indentation Overlapping not allowed Fixing reference Clearance 0 to 0 5mm overlapping not allowed A A cross section ...

Page 357: ...r sheet 3 2 1 0 0 0 3 Arrow view Fixing reference 0 5mm Fix in order 1 2 and 3 so that mylar does not sag Make sure that edges of mylar guide do not deviate Sagging not allowed Arrow View Guide mylar sheet 3 Fixing reference 0 to 1 Fixing reference 0 to 1 ...

Page 358: ...ection Separation pad Fixing reference Clearance 0 to 0 3mm overlapping not allowed Separation mylar sheet Separation mylar sheet Fixing reference Clearance 0 to 0 5mm when pushed up against this line A A cross section The paper path direction in the figure must be free from steps that may catch the paper 0 0 Flapper rubber skirt F ix in g re fe re n c e 0 to 0 5 m m e n d fa c e re fe re n c e Ar...

Page 359: ...ror seal do not scratch the mirror surface Fixing reference when pushed against indentation Clearance 0 to 0 5mm Overlapping not allowed A A Reversal mirror seal Fixing reference when pushed against indentation Clearance 0 to 0 5mm Overlapping not allowed Reversal mirror seal A A cross section ...

Page 360: ...A TEC 16 69 6570 5570 ADF 12 Cushions Fixing reference Clearance 0 to 0 5mm end face reference Cushions Fixing reference Clearance 0 to 0 5mm end face reference Fixing reference Clearance 0 to 0 5mm end face reference ...

Page 361: ...the ribs so that they do not overlap the ribs 3 locations reversal roller cushion Fixing reference 0 5mm reversal roller mylar sheet Fixing reference 0 to 0 5mm Reversal roller cushions 3 locations Reversal roller mylar sheets 3 locations reversal roller mylar sheet Fixing reference when pushed against this line Fix these cushions between the ribs so that they do not overlap the ribs 3 locations ...

Page 362: ...nce 0 to 0 5mm hold end reference line w out crimp 0 Discharge brush 0 5 The tip must be firmly pressed against the DF cover The tip must not protrude from the DF cover A A cross section Fixing reference 0 to 0 5m m line w out crim p reference Section a Insert into hole and fix to rib ...

Page 363: ...w Overlapping of ribs is not allowed Clearance must be 0 to 2mm Firmly fix the DF cover sheets so that they do not rise up along the curve of the DF cover Fixing reference Deviation 0 5mm slide tool line DF cover sheet 2 2 locations Overlapping of the gate not allowed DF cover sheet 8 2 locations DF cover sheet 1 2 locations Overlapping of the gate not allowed DF cover sheet 6 DF cover sheet 5 DF ...

Page 364: ...g reference 0 to 0 5mm end face rounded corner end reference Fixing reference 0 to 0 5mm end face rounded corner end reference indentation end face reference Tray sheet guide indentation end face reference Tray sheet guide Fixing reference 0 0 5mm Fixing reference 0 0 5mm ...

Page 365: ...transfer belt unit FRM FEED 794 R Note 1 Note 2 GUIDE ALGN IN Note 2 Rear side A B Discharge brush 18 Discharge Paper feeder area Attaching Position Attach it to the two edge positions in GUIDE ALGN IN A and B below Note1 Insert the discharge brush between the FRM FEED 794 and the GUIDE ALGN IN rear side only Note2 To perform correctly Note 1 be sure to make the discharge brush rise up from the GU...

Page 366: ...ar DF cover 0 1mm Aligning with rib 0 1mm Aligning with rib Shield mylar COV DF 794 2 4 2 5 20 Pad cushion 0 1mm Must not protrude beyond the bracket 0 1mm Must not protrude beyond the bracket Pad cushion BKT PAD SPT 794 Pad cushion Align and then attach Gap 0 0 5mm ...

Page 367: ...e mylar Unit mm BELT SHEET RVS M MYLAR RVS M Not to protrude 0 1 0 1 MYLAR RVS M SHEET RVS M 1 0 0 5 0 5 0 5 22 Reverse section side mylar 0 0 5 Not to become stuck on the rib 0 0 5 Not to become stuck on the rib Unit mm MYLAR RVS U R View 0 1 1 MYLAR RVS U F Rounded corner end ...

Page 368: ...d mylar 1 24 Paper feed mylar 2 Gap up to 0 5mm Aligning with rib Gap up to 0 5mm Aligning with rib Paper feed Mylar 1 A A A Sectional view A 0 0 5mm for end face 0 0 5mm for end face 0 0 5mm for bent area 0 0 5mm for bent area Paper feed Mylar 2 Paper feed Mylar 2 ...

Page 369: ...8070 6570 5570 4580 ADF 16 78 Mar 2000 TOSHIBA TEC 16 13 PC Board 1 PWA F LGC 794 ...

Page 370: ...Mar 2000 TOSHIBA TEC 16 79 8070 6570 5570 4580 ADF 2 PWA F SEN 794 ...

Page 371: ... of the door switches 2 locations 17 2 Operation of DC Output Circuit 1 Start When the main switch on the main unit is turned ON the power on all lines starts up if the door is closed 2 Stop When the main switch on the main unit is turned OFF the power OFF signal PWR DN signal is output after the momentary power failure guarantee time 20 ms or more passes The power voltage is dropped after the rat...

Page 372: ...DA 24VA DGA 24VB DGB 24VC DGC 24VD DGD DGE 36VA DGA 36VB DGB DGC 36VD DGD 3 3VA C GNDA C 3 3V 5 1VB D E H I GNDB D E H I 5 1V 12VA C DGA C 12V 24VF DGF 24VG DGG 24VH DGH Exposure lamp load Heater lamp load Frequecy reactor Frequecy reactor Breaker Live Main switch Neutral Door switch Switching power supply ...

Page 373: ...ence AC input 700 ms or less Within 10 ms 3 2V or more 3 2V or more 4 95V or more 4 95V or more 4 95V or more 4 95V or more 11 4V or more 11 4V or more 21 6V or more 21 6V or more 21 6V or more 21 6V or more 34 2V or more 34 2V or more 0 200 ms 5 ms or more 0 ms or more 0 200 ms 10 ms 120 ms 20 ms or more 20 ms or more 50 ms or more 10 ms or more ...

Page 374: ...Mar 1999 TOSHIBA TEC 18 1 6570 5570 PC BOARD 18 PC BOARD 1 PWA F SYS 300 ...

Page 375: ...6570 5570 PC BOARD 18 2 Mar 1999 TOSHIBA TEC 2 PWA F MTB 300 ...

Page 376: ...Mar 1999 TOSHIBA TEC 18 3 6570 5570 PC BOARD 3 PWA F LGC 300 ...

Page 377: ...6570 5570 PC BOARD 18 4 Mar 1999 TOSHIBA TEC 5 PWA F MOT 300 4 PWA F ADU 300 ...

Page 378: ...Mar 1999 TOSHIBA TEC 18 5 6570 5570 PC BOARD 6 PWA F SLG 300 7 PWA F SDV 300 ...

Page 379: ...6570 5570 PC BOARD 18 6 Mar 1999 TOSHIBA TEC 8 PWA F PLG 300 ...

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Toshiba 4580, Service Manual

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