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Toshiba 1550, Service Manual

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Toshiba 1550 Service Manual Download Page 190

Mar. 1998 © TOSHIBA

15 - 1

1550/1560 POWER

15. POWER STABILIZING CIRCUIT (AC UNIT)

15.1 General Description

This power supply circuit has the following outputs:

1

DC outputs:

•

+5V : Supplied to LSIs, logic ICs, driver ICs, etc.

•

+5VE

: Power supply for LED eraser array (DCH).

•

+24VA

: Power supply for the main motor (M1).

•

+24VB

: Power supply for clutches and high-voltage transformer.

•

+24VC

: Power supply for the optional sorter.

•

+24VD

: Power supply for the optional ADF.

2

AC outputs:

•

For driving the heater lamp

•

For driving the lamp regulator

3

Other control signals:

•

Zero-cross output

: Zero-cross interrupting signals

•

AC OFF signal

: Reset signals

Summary of Contents for 1550

Page 1: ...he window kmarks and Page button to open the Contents and marks created for the document Click a bookmark s name age marked by that bookmark mbnails and Page button to open the overview area and bnail images of each document page Click a thumbnail to e marked by that thumbnail TOSHIBA CORPORATION 1998 S RESERVED ...

Page 2: ...h humidity dust vibration and direct sunlight To insure adequate working space for the copying operation keep a minimum clearance of 80 cm 31 5 on the left 80 cm 31 5 on the right and 10 cm 3 9 in the rear 3 Service of Machines Basically be sure to turn the main switch off and unplug the power cord during service Be sure not to touch high temperature sections such as the exposure lamp the fuser un...

Page 3: ...he copier during servicing 6 Disposition of Consumable Parts Packing Materials Regarding the recovery and disposal of the copier consumable parts and packing materials it is recommended to follow the relevant local regulations or rules 7 When parts are disassembled reassembly is basically the reverse of disassembly unless otherwise noted in this manual or other related documents Be careful not to ...

Page 4: ...ual A3 A5 R 64 130g m2 Sheet bypass Ledger Statement R 16lb 34lb feeding only 678 Special paper Label paper type recommended by Toshiba and OHP film 80 µm or more in thickness type recommended by Toshiba bypass feeding only Copy speed sheets minute Actual size Reduction Enlargement Paper size Cassette Manual Cassette Manual A4 B5 A5 R 15 1 8 LT ST R A4 R B5 R 12 1 8 LT R B4 FOLIO 10 1 8 LG COMPUTE...

Page 5: ...r Europe Manual start At the time of shipping the copying operation is started by the PRINT key By inputting data for adjustment mode it can be changed to auto start Toner supply Automatic density detection and replenishment Toner cartridge replacement method Exposure Automatic control and manual control Weight 35 kg Power source 110 V 50 60 Hz 115V 60 Hz 127 V 60 Hz 220 V 50 60 Hz 220 240 V 50 60...

Page 6: ...SPECIFICATIONS Copy paper size 64 80g m2 60 copies stacking 16 22lbs 60 copies stacking 80 130g m2 single sheet feeding 22 34lbs single sheet feeding Weight of machine 38kg Size of a machine W571 x D541 x H340mm 541 mm 548 mm 340 mm ...

Page 7: ...er kit MU 10 660 02051 Counter bracket kit KN 1550K 660 84840 Cassette KC 1550AF 660 84841 KC 1550LF 660 84842 KC 1550AFE 660 84914 Damp heater kit MF 1550U 660 84848 MF 1550E 660 84849 Paper feed unit MY 1004L 660 84835 MY 1004AE 660 84913 MY 1004A 660 84836 Sorter bracket kit KN 1550S 660 84839 for MG 1003 Supplies Drum PS OD1550 66084854 Developer material PS ZD1550 66084853 Toner PS ZT1550 660...

Page 8: ...ecovery blade 24 Toner recovery auger 25 Transfer charger 26 Separation charger 27 Drum 28 Pre transfer bias guide 29 Transport guide 30 Magnetic roller 31 Leveler doctor 32 Auto toner sensor 33 Mixer 34 Bypass feed guide 35 Bypass feed tray 39 Aligning roller upper 40 Aligning roller lower 41 Aligning switch 42 Transport roller left MY 1004 43 Transport roller right MY 1004 44 Paper stop switch M...

Page 9: ... drive gear 66 Drum gear 67 Main motor 68 Heat roller gear 70 Exit roller gear 72 Aligning roller clutch 73 Transport roller clutch MY 1004 75 Cassette 76 Feed roller clutch 77 Pick up roller clutch 78 PFU cassette MY 1004 79 PFU feed roller clutch MY 1004 80 PFU pick up roller clutch MY 1004 81 PFU drive motor MY 1004 ª º º º ...

Page 10: ...r 1998 TOSHIBA 2 3 1550 1560 GENERAL 2 1 2 Front and Rear sectional views for the 1560 The differences from the 1550 Bypass paper guide Bypass paper feed roller Bypass pick up roller Bypass separation pad ...

Page 11: ...1550 1560 GENERAL 2 4 Mar 1998 TOSHIBA ...

Page 12: ... High voltage transformer PS HVT 7 Heat roller thermistor THMS HTR 8 Exit switch EXT SW 9 Logic PC board PWA F LGC 10 Power supply unit PS ACC 11 Size switch SIZE1 SW 12 Paper empty switch EMP2 SW 13 Aligning switch RGT SW 14 Toner full switch T FUL SW 15 Auto toner sensor SNR ATC 16 Eraser lamp PC board ASM F ERS 17 LED discharge array PC board ASM DCH 18 Mirror switch MRR SW 19 Auto exposure PC ...

Page 13: ...ctrical parts such as motors Symbol Name 1 Main motor MAIN MTR 2 Scanning motor SCN MTR 3 Mirror motor MRR MTR 4 Lens motor LNS MTR 5 Front optics fan OPT FAN F 6 Rear optics fan OPT FAN R 7 Exit fan EXIT FAN 8 Toner motor TNR MTR 8 7 6 5 4 3 2 1 ...

Page 14: ...n switch MAIN SW 3 Damp heater L D HTR L 4 Thermostat 5 AC power cable 6 Fuse PC board PWA F FUS 7 Damp heater U1 D HTR U1 8 Exposure lamp EXPO LAMP 9 Thermofuse FU EXPO 10 Lamp regulator PC board PS LRG 11 Heater thermostat K THMO 12 Heater lamp HTR LAMP 13 Damp heater U2 D HTR U2 1 2 7 8 9 0 3 6 4 5 ...

Page 15: ...an rear M60 M8 EXIT FAN Exit fan Cools the drum and cleaner IC motor M60 P3 I8 M9 TNR MTR Toner motor Replenishes the toner Brush motor P17 I31 2 Electromagnetic spring clutches Symbol Code name Function Remarks Page item No CLT1 RGT1 CLT Transmits aligning roller P7 I4 Aligning roller clutch drive CLT2 FED1 CLT Transmits feed roller drive P7 I22 Feed roller clutch CLT3 PKLP CLT Transmits pick up ...

Page 16: ...stem S8 LNS SW Lens switch Detects home position of the Photointerruptor P12 I16 lens unit S9 MRR SW Mirror switch Detects home position of the Photointerruptor P8 I27 mirror unit S10 T FUL SW Detects when the used toner Microswitch P17 I22 Toner full switch bag is full 5 Heaters and lamps Symbol Code name Function Remarks Page item No EXP EXPO LAMP Exposes the original Halogen lamp P10 I14 Exposu...

Page 17: ...s exposure lamp P4 I35 Lamp regulator PC board DCH ASM DCH Turns on and drives LED P15 I15 LED eraser array PC board during reduction ERS ASM ERS Discharge lamp P15 I14 Discharge lamp PC board AES PWA F AES Reads dark light of the original P8 I28 FUS PWA F FUS Fuse PC board Fuse for the damp heater Option P5 I23 circuit 8 Others Symbol Code name Function Remarks Page item No ATS SNR ATC Reads tone...

Page 18: ... EXPO LAMP S9 DUMP HTR U1 MRR MTR M9 J T FUL SW S10 TNR MTR LNS MTR PS LRG J502 J501 ASM FUS PS ACC LGC SCN MTR J9 J5 J4 PWA F LGC J53 M8 M7 J57 LNS SW PWA F AES K CTR M4 ASM ERS ASM DCH SNSR A T MRR SW M2 M3 J83 J11 T CTR FU EXPO J60 J64 J51 J52 J86 J81 J77 J82 J73 J73 J74 J75 J76 J77 J21 J79 J508 J25 J80 J61 J18 HOME SW J58 J59 DRM THMS J90 J78 AC DC DUMP HTR U2 ...

Page 19: ...R UNIT AC INPUT POWER SUPPLY S1 DOOR SW S2 S5 S3 PS ACC PWA F LGC J521 K THERMO HTR LAMP SEPARATION CHARGER TRANSFER CHARGER J84 J526 J527 J528 J529 CLT1 CLT3 CLT2 J511 J10 J8 J63 J85 J64 THMS HTR J7 J3 J522 A3 A1 A2 EXIT SW J62 RGT SW J69 SIZE SW J65 EMP SW J72 J66 J67 J71 J68 J70 D HTR L PRE TRANSFER GUIDE B2 J531 J532 B1 B3 M1 AC DC ...

Page 20: ...arts 2 4 1 Removing covers A Front cover 1 Remove the cassette in the direction of the arrow 2 Remove the screws fastening the hinge 4 pcs B Inner cover upper 1 Open the front cover 2 Remove the toner cartridge 3 Remove three screws Front cover Cassette Hinge Inner cover upper ...

Page 21: ...per and lower and feed side cover Feed side cover Open the front cover Raise the upper unit Remove three screws Right side cover lower Open the front cover Raise the upper unit Remove two screws Right side cover upper Remove two screws Remove the glass holder see 2 4 1 Right side cover upper Right side cover lower Feed side cover ...

Page 22: ...5 Mar 1998 TOSHIBA E Top cover and glass holder Glass holder Open the original cover Remove two screws Top cover Remove the original cover Remove three screws F Rear cover Remove two screws Top cover Glass holder Rear cover ...

Page 23: ...er Left side cover upper G Left top cover left side cover upper and left side cover lower 1 Raise the upper unit Left top cover Remove the original scale Two screws Remove two screws Left side cover lower Remove two screws Left side cover upper Remove one screw Original scale ...

Page 24: ...1550 1560 GENERAL 2 17 Mar 1998 TOSHIBA H Control panel cover 1 Raise the upper unit and remove the inner cover upper 2 Disconnect two connectors and remove four screws Connectors ...

Page 25: ... Place the control panel cover upside down and remove its metal cover 6 screws Remove the earth screw of the shield Remove the counter connector 3 When you remove nine 9 screws the control panel PC board can be taken out along with the harness They can be separated if you disconnect two connectors Note Be careful not to allow the ground wire of the shield to be cut Connector Earth screw ...

Page 26: ...C board PWA F LGC 1 Remove the rear cover 2 Disconnect connectors 10 pcs when no op tional equipment is used and 11 pcs when op tional equipment are used and take out the PC board from its four lock supports D Power supply unit 1 Remove the rear cover 2 Disconnect connectors 9 pcs 3 Remove four screws About bottom 4 connectors black harness must be connected L terminal that is de scribed on PC boa...

Page 27: ...o the colors of the connectors and the harnesses Main switch E ring Door switch Inside the unit Harness Blue White Blue White Harness Blue Yellow Yellow Blue Connector Connector Black Black White White Black Black White White Door switch Main switch E 2 1560 1 Remove the rear cover 2 Open the front cover and raise the upper unit 3 Remove the bypass paper feed cover 2 screws 4 Remove the front supp...

Page 28: ...the control panel 10 Remove the paper feed side gas spring E ring 1 piece Then open the original cover to prevent the upper unit from falling down 11 Remove 1 screw of the paper guide and pull it out toward the front two paper guides can removed at the same time 12 Remove the right cover 13 Remove the connector cover of the switch 5 1 Pap E 2 11 14 Remove the 3 screws of the bracket fixing the swi...

Page 29: ...le pushing the switch pawl When reassembling take care with the contacting of the connector E 2 17 Main switch connector connecting diagram 1 5 3 2 6 4 Door switch connector connecting diagram Harness black Connector blue Harness black Connector yellow Harness white Connector blue Harness white Connector yellow Terminal No Harness red Harness gray Terminal No Harness black Connector blue Harness w...

Page 30: ...rts PS HVT M G Size switch 1 Pull out the cassette 2 Remove two screws 3 Disconnect one connector Note The left screw is tightened with the protec tive cover on the corner of the switch H Exit fan 1 Remove the left side cover upper 1 screw 2 Disconnect three connectors front 3 Remove the duct cover 1 screw 4 Separate the exit fan from the cover 1 con nector Screws Size switch Exit fan Duct cover ...

Page 31: ... inner cover 2 Disconnect one connector 3 Remove two screws Optics fan front J Fuse PWA F FUS 140 1 Remove the rear cover 2 Replace the fuse K Fuse PC board PWA F FUS 140 1 Disconnect one connector 2 Remove one screw 3 Remove the fuse PC board with the bracket PWA F FUS 140 Fuse ...

Page 32: ... 25 Mar 1998 TOSHIBA L Main motor 1 Disconnect two connectors 2 Remove two screws M Lamp regulator PC board PS LRG 1 Remove the top cover 2 Disconnect two connectors and remove the PC board from three lock supports PS LRG ...

Page 33: ...Mar 1998 TOSHIBA 2 26 1550 1560 GENERAL N Optics fan rear 1 Remove the top cover Remove the connector from the sorter two screws 2 Disconnect one connector 3 Remove two screws Optics fan rear ...

Page 34: ...he copy paper is separated from the surface of the drum together with the toner image 7 Fixing The toner image is fixed to the copy paper by heat and pres sure 8 Cleaning Any toner remaining on the photoconductive surface of the drum is mechanically removed by the cleaning blade 9 Discharging Erases the electrostatic charge remaining on the photoconduc tive surface of the drum _ _ _ _ _ _ _ _ 2 1 ...

Page 35: ...ains constant even when voltage varies 4 Development 1 Magnetic roller One magnetic roller with two shaft mixers 2 Auto toner Magnetic bridge circuit system 3 Toner replenishment Toner cartridge system 4 Toner empty sensor Intensity sensing system 5 Toner T 1550 or T 1550E 6 Developing material D 1550 7 Developer bias DC 200V 5 Transfer Adjustable output fixed current 6 Separation Adjustable outpu...

Page 36: ...at roller system Fixing Fixing roller Teflon coated roller Pressure Pressure roller PFA tube silicon roller ø28 Lamp rating 900W infrared heat 2 Cleaning Cleaning with silicon impregnated roller 3 Heater temperature ON OFF control by thermistor control 10 Control Microcomputer ...

Page 37: ...s paper in the cassette Exit fan M8 starts rotating at low speed and optical fans M6 M7 stop 4 2 2 Standby ready condition All keys on the control panel are operable When there is no other key entry for a predetermined period the machine is set automatically to a copy quantity of 1 a reproduction ratio of 100 and automatic exposure 4 2 3 Cassette feed copying using the print key 1 Print key ON Pri...

Page 38: ...ge operation Paper is transported to transfer section transport is promoted aligning roller clutch CLT1 is turned ON and the copy quantity counted 5 Carriage scanning complete Scanning motor M2 is turned OFF The main charger and the exposure lamp are turned OFF Aligning roller clutch CLT1 is turned OFF The timing varies according to paper used 6 Paper exit operation The exit switch S6 detects the ...

Page 39: ...0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 8 28 7 72 0 1 03 0 71 0 84 3 37 3 53 3 45 4 53 4 98 0 4 31 3 6 1 16 1 58 0 06 0 06 0 36 1 29 3 88 3 68 5 7 0 6 33 BWD BWD FWD FWD PICUP CLT RGT CLT EXIT SW HVT TR HVT M EXPO LAMP SCN MTR MAIN MTR FED CLT PSTP SW HVT SP MAIN MTR CW CCW ...

Page 40: ...3 0 71 0 84 3 37 4 89 7 48 4 31 3 6 1 16 1 58 0 06 0 06 0 36 3 75 4 05 1 29 3 75 4 98 3 88 5 27 7 57 3 68 4 85 7 37 5 7 7 54 9 64 5 89 8 26 3 53 4 71 7 47 3 45 4 53 4 81 7 23 8 47 8 92 12 23 12 23 11 67 BWD BWD BWD FWD FWD PICUP CLT FED CLT RGT CLT PSTP SW EXIT SW HVT SP HVT TR HVT M EXPO LAMP SCN MTR MAIN MTR CW CCW MAIN MTR ...

Page 41: ...r transfer charger separation charger transfer bias discharger lamp LED eraser lamp are turned ON and the optical system fan motor rotates at a high speed The main motor comes ON the drum developert heat roller and paper exit roller rotate 3 Bypass paper feed operation The manual feed clutch comes ON the bypass pick up roller paper feed roller rotate Aligning operation the paper reaches the aligni...

Page 42: ...1 Service call A 1 Add paper When cassette is inserted in the machine the paper empty switch S3 or S16 detects the existence of paper When there is no paper the switch goes OFF When cassette is not inserted in the machine the paper size switch S4 or S18 detects the non existence of cassettes The paper size switches all go OFF When cassette is not inserted in the machine When cassette is inserted i...

Page 43: ... aligning roller starts rotating Bypass misfeed The bypass misfeed symbol is displayed Copying cannot be started A 3 Insert key copy counter If the key copy counter option has been inserted in the machine and is withdrawn Insert Key Counter is displayed Copying can not be started If the key counter is withdrawn during copying the machine will stop after the paper being copied has exited f f f f ...

Page 44: ...s have elapsed The Clear Paper symbol E02 ap pears and copying stops Immediately after the power is turned ON The aligning switch S5 and exit switch S6 detect the paper ON Clear Paper symbol E03 The front cover is opened during copying Clear Paper symbol no indication B 2 Add toner Toner density has become low Toner empty signal detection Auto toner sensor Control circuit Add Toner symbol appears ...

Page 45: ...played When the toner full switch S10 comes ON during copying Copying will stop after the last sheet has been exited during copying Clearing method Replace with a new toner bag C 1 Service call When the CLEAR STOP key and the 8 key are pressed simultaneously while the Service Call sym bol is flashing an error code will be indicated in the copy quantity indicator For the contents of the error codes...

Page 46: ...4 4 Flow Charts 4 4 1 After power supply is turned ON YES YES YES NO NO NO SCN MTR M2 LNS MTR M3 MRR MTR M4 Start initialization Heater lamp HTR ON Covers open DC power ON Main switch S1 ON E03 Paper jammed RGT SW S5 ON EXIT SW S6 ON A Restart ...

Page 47: ...ervice call C41 Service call C21 Is heat roller temperature high enough for fixing Has heater lamp reached specified temperature 20 seconds after being turned ON Initialization completed Twenty seconds elapsed since initialization Add toner Toner empty T FUL SW S10 ON A Replace toner bag ...

Page 48: ... its home position Remaining copy quantity 0 T CTR OFF DCH OFF Main charger OFF CLT1 ON T CTR ON CLT3 OFF Carriage stops Carriage forward EXP ON CLT3 ON CLT1 ON DCH ON Main charger ON Transfer charger ON Separation charger ON Discharge lamp ON Process system control Transport system control Optical system control Carriage moves towards home position C01 Print key ON Is PLL checking on main motor C...

Page 49: ...Mar 1998 TOSHIBA 4 13 1550 1560 OPERATION OK YES NG NO E02 Paper jammed B S6 Check 2 Final copy Drum reverses Standby C ...

Page 50: ...h when the attention of the operator needs to be drawn 1 2 3 4 5 6 7 8 9 0 200 50 000001 B4 82 71 FOLIO FOLIO A3 A4 122 141 200 A4 B4 A5 A4 A4 A3 A5 A3 50 A3 A5 A3 C AMS APS 1 ADF AMS APS 2 in 1 SORTER CASSETTE DARK IMAGE MODE CLEAR STOP PRINT LIGHT AUTO INTERRUPT DUAL PAGE COPY ENERGY SAVER SORT GROUP 2 3 4 5 6 7 8 9 0 200 ZOOM 50 78 129 LT R LT R COMP LG COMP LD 154 ST R COMP LG 200 ST R LD LG L...

Page 51: ...set number If a fault occurs copying is not possible flashes The symbol is displayed when the cassette selected has no paper includ ing Insert Cassette Bypass feeding is possible flashes The symbol is displayed when the toner in the toner cartridge runs out The key flashes in red to indicate that the key copy counter has been with drawn when the optional key copy counter is installed flashes The s...

Page 52: ...re Photo exposure CASSETTE SELECTION key INTER RUPT key ENERGY SAVER key Condition Operation _ Machine operates or indicates in accordance with the operator s action Operation is ignored 1 By pressing the ENERGY SAVER key or the PRINT key the energy saving mode will be cancelled 2 During copying avoid changing exposure as far as possible 3 The function of the CLEAR STOP key changes in the followin...

Page 53: ... ON 2 The actual circuit is controlled as follows DSPON0 and DSPON1 signal goes to L level alternatively for 8 msec Q1 or Q2 goes to the ON condition when the DSPON0 or DSPON1 signal is at L level The LED ON OFF signal from LGC is in putted to the IC SIN pin 5 terminal via the DSPDAT signal serial data LED ON OFF signal is outputted in parallel to D1 D16 output terminal after being in putted to IC...

Page 54: ...PON1 signal DSP ON0 DSP ON1 DAT1 2 IN 1 SRV DAT2 APS ADFJ DAT3 AMS SRTJ DAT4 GRP PM DAT5 SRT TE DAT6 PS MFJ DAT7 INT EXTJ DAT8 EXP1 TF DAT9 EXP2 FJ1 DAT10 EXP3 PE1 DAT11 EXP4 CS1 DAT12 EXP5 PE2 DAT13 EXP6 CS2 DAT14 EXP7 FJ2 DAT15 EXP8 AUTO DAT16 EXP9 PHOT DAT17 MAG2 g MAG1 g DAT18 MAG2 b MAG1 b DAT19 MAG2 a MAG1 a DAT20 MAG2 f MAG1 f DAT21 MAG2 e MAG1 e DAT22 MAG2 d MAG1 d DAT23 MAG2 c MAG1 c DAT2...

Page 55: ...rs by means of the main motor All parts except the main motor are located inside the frames Dirve mechanism as seen from the rear G34 Drum G21 G30 G24 G40 Drum drive gear G25 G20 G20 G75 G63 Drum gear Heat roller G40 G34 Main motor G34 G16 G25 G40 Aligning roller lower G20 Pick up roller G26 G30 G23 G25 Developer drive gear G30 G20 Feed roller G18 For PFU connection G30 Transport roller for PFU G1...

Page 56: ...No of gear teeth 25 Auger ø15 Drum ø60 No of gear teeth 60 Main motor No of gear teeth 10 No of gear teeth 75 No of gear teeth 16 No of gear teeth 34 No of gear teeth 34 No of gear teeth 34 CL roller ø20 CL roller ø20 No of gear teeth 15 No of gear teeth 14 No of gear teeth 19 No of gear teeth 40 No of gear teeth 40 Exit roller ø20 55 ø24 H R ø30 053 ø29 99 ALN CLT ø20 lower roller No of gear teet...

Page 57: ... motor through gears to the developer unit drive gear to drive the developer unit Heat roller drive Transmits the rotation of the main motor through gears to the heat roller gear to drive the heat roller Exit roller drive Drives the exit roller gear through gears Copier s aligning roller Drives the copier s aligning roller through gears PFU transport roller Drivers the transport roller through the...

Page 58: ...ly and Replacement 6 3 1 Main motor 1 Remove the rear cover 2 Disconnect two connectors 3 Remove two screws 2 Remove the cover mirror 6 1 screw 6 3 2 Drum drive gear and developer drive gear 1 Remove the process unit 2 screws Main motor Cover mirror 6 ...

Page 59: ...60 DRIVE 3 Remove the transfer separation charger Re fer to 9 3 6 4 Remove the transport guide 1 screw and 1 blue connector at the rear 5 Remove the inner cover lower left 6 Remove the fuser unit 1 screw Hook Transport guide Knob ...

Page 60: ...TOSHIBA 7 Remove the lamp regulator two connectors 8 Remove the exposure lamp and power sup ply connector 9 Disconnect the connector for the auto expo sure lens switch and mirror motor Lamp regulator Connectors Connector Connector ...

Page 61: ...Mar 1998 TOSHIBA 6 7 1550 1560 DRIVE 10 Pull out the three connectors for the main charger and the bias wire from the high volt age transformer 11 Disconnect the connector for the process unit ...

Page 62: ... Remove the drive unit from the rear inside of the machine 3 screws 13 Removing two screws take out the bracket and the gear can be replaced Drive unit Close the clamshell and remove 2 screws from each of the 2 screw holes on the rear frame ...

Page 63: ... separation charger 3 Remove the transport guide 4 Remove the connector cover of the feeder unit 5 Remove the feeder unit 1 screw and connec tor 6 Remove the lower drive unit bracket 1 screw and separate the drive unit from the bracket 2 screws Paper feed unit Screws fastening the bracket Lower drive unit ...

Page 64: ...3 Hall elements A C detects rotation position of motor rotor 4 The excitation phase switching section switches the excitation of each phase By repeating 2 through 4 the motor continues to turn 5 An FG pulse is generated by FG pattern attached to the main motor 6 The FG pulse and the reference frequency are compared for their phase and speed and their differences added to IC3 7 Change the switch ti...

Page 65: ...te and the signal becomes L and LED ED1 comes ON 3 MTR BRK signal LGC MTR Input This is the signal to control the speed of the main motor The brake is applied to the main motor when the signal becomes L level 4 MAINMTR ON signal LGC MTR Input This is a signal to turn ON OFF the main motor The main motor turns when this signal becomes H level 5 MOT FG signal This signal generates FG signals while t...

Page 66: ... side spring of the separation pad and remove the separation pad Separation pad holder 5 3 9 Spring Separation pad holder Ill 6 5 2 2 Spring 6 5 3 Removal of the clutch 1 Remove the main switch door switch See item 2 4 2 E 2 2 Removal the clutch and the paper sensor 3 Close the upper unit 4 Remove 2 screws from the upper unit slide the unit to the front and take it out in the direction of paper fe...

Page 67: ...of the paper feed roller or the separation pad 3 When reassembling the timing belt removed when taking cut the pick up roller pass it through the upper side of the belt tensioner 4 When installing the separation pad bracket to the copier first free the paper stop lever by pushing down the pick up roller downwards 1 he projection into the ket hole Note 1 Put the into the Illust Align with the groov...

Page 68: ... the original glass carriage 1 carriage 2 lens unit mirror unit and drive motors 1 Original glass 2 Carriage 1 2 1 Exposure lamp 2 2 Reflector 2 3 Mirror 1 3 Carriage 2 3 1 Mirror 2 3 2 Mirror 3 4 Lens unit 5 Mirror unit 5 1 Mirror 4 5 2 Mirror 5 6 Mirror 6 7 Slit glass 5 2 1 4 7 6 3 3 1 3 2 5 1 5 2 2 3 2 2 2 1 ...

Page 69: ...AL 7 2 Mar 1998 TOSHIBA º 8 9 º 8 Scanning motor 8 1 8 2 Carriage drive wire 9 Mirror motor º Lens motor 10 1 Lens drive belt 1 pc Auto exposure PC board 5 9 8 2 3 4 2 10 1 8 1 Feed side Exit side Front side Rear side ...

Page 70: ...eth 27 Timing belt 2M 112 2M 77 Timing belt Shaft Front Carriage 1 drive Carriage 2 drive Carriage 1 drive Carriage 2 drive Rear Carriage drive wire Carriage drive wire Carriage drive wire Shaft Carriage drive wire Shaft View as seen from the rear View as seen from the front 3 1 2 6 4 5 Shaft P Pulley Scanning motor Fixed to CRG 1 Wire fixing 1 CRG 2 P15 2M 112 2M 77 P66 P18 Wire fixing 7 Feed sid...

Page 71: ...by car riage 1 passing the home switch When the PRINT key is pressed the scanning motor causes carriage 1 and 2 to scan the original 7 2 2 Mirror motor and lens motor Rear side Home switch Lens motor 1 G18 Rack Mirror motor 2 G70 G10 View as seen from the front View with the process unit and the stay removed and the upper unit raised ...

Page 72: ...oward the feed side and stop at the actual size 100 position When a reproduction ratio is selected When a copy reproduction ratio is set the lens unit and the mirror unit move to their respective positions for the specified reproduction ratio Lens motor 1 Gear Teeth 18 Gear Teeth 70 Pulley Teeth 16 Mirror motor 2 Gear Teeth 18 Gear Teeth 70 Gear Teeth 10 Fixed to the rack Mirror unit Mirror switch...

Page 73: ...ew 7 3 Disassembly and Replacement At the time of disassembly or replacement first remove the covers process unit original glass etc as required Optics cover Damp heater Option Remove three screws three clamps and dis connect one connector Auto exposure PC board Auto exposure PC board Remove one screw disconnect one connector and the PC board can be replaced Connector Damp heater Clamp ...

Page 74: ...the belt tension adjustment is nec essary reinstall the screw at the elongated hole B not the hole A After having pushed the scanning motor in the direction of the arrow install it 4 After taking out the unit remove two screws and the motor is removed Note When reassembling the parts make sure that the timing belt is securely placed on the pul leys P66 P18 and the shaft drive pulley P22 7 3 3 Mirr...

Page 75: ...and the lens motor is same but the output is different Mirror motor silver maker name Lens motor red maker name Main switch door switch unit Lens motor Connector Home switch 7 3 4 2 1560 1 Remove the main switch door switch See item 2 4 2 E 2 2 Remove the lens motor connector 3 Remove the lens motor screw 7 3 5 Home switch mirror switch and lens switch Home switch 1 Remove the top cover 2 Remove t...

Page 76: ...posure lamp and thermofuse 1 Remove the original glass 2 Align carriage 1 with the cutout section of the frame Lens switch Lens unit View as seen from the exit side Carriage 1 Cutout section Cutout section Mirror switch 1 Remove the original glass 2 Remove the optics cover 1 screw 3 Move both carriages 1 and 2 to the exit side and the mirror unit to the feed side 4 Remove the switch by disengaging...

Page 77: ...rmofuse Rear side Front side Teflon tube View as seen from the exit side Carriage 1 Supply cable Harness clamp Exposure lamp 1 While pushing the lamp toward the front A disengage it from the supply blade Notes 1 During replacement don t touch the lamp surface with a bare hand 2 Be careful not to allow the lamp to get scratched by the wire Front side Exposure lamp Carriage drive wire ...

Page 78: ...ve the original glass top cover right side cover upper left side cover upper in ner cover and control panel 2 Remove carriage 1 and the wire fixture each screw for the front and rear Note Be careful not to get hitched by the wire 2 Move and align carriage 1 with the cutout sec tion of the frame then unhook the wire fixture each screws for the front and rear 3 Remove the power supply cable from the...

Page 79: ...both front and rear Hook Carriage 2 5 Remove carriage 2 3 Using the wire holder jig fasten the wire on the shaft so that it does not loosen at both front and rear Note The front side wire can be identified by its mark on the metal portion Front side wire F Rear side wire R Wire holder jig View as seen from the feed side Carriage drive wire ...

Page 80: ...60 OPTICAL 7 Remove the pulley on the rear side 1 screw Pulley Wire take up pulley 8 Loosen the screw for the wire take up pulley located inside the frame for both front and rear Scanning motor 6 Remove the scanning motor 3 screws ...

Page 81: ...emove the mirror 6 s cover 1 screw 3 Remove the mirror 6 s bracket 1 screw 4 Move the mirror 6 s bracket in the directions of arrows 1 and 2 and take out the bracket Mirror 6 s bracket Mirror 6 9 Remove the stop ring from the shaft front 10 Pull out the shaft from the rear Shaft Stop ring ...

Page 82: ... by hybrid IC STK6712BMK3 of the unipolar constant current chopper drive The driving circuit for phase A and A is shown below The same circuit is also used for the drive of phase B and phase B Internal equivalent circuit of STK6712B Drive voltage regulator The circuit composition in the IC consists of each phase excitation switching section IC2 a driver F1 F2 a comparator IC1 and an electric curre...

Page 83: ...e R1 increases and as the B voltage gets higher than E voltage C becomes H level and F1 becomes OFF 6 As coils A and A are bipolar wound the energy accumulated in coil A is induced into coil A and discharged using coil A In other words the electric current flows in the direction of DG R9 F2 diode coil A 7 The voltage accumulated in capacitor C1 decreases and when it gets lower than E voltage C goe...

Page 84: ... OA OA Vcc1 1 A 2 A 3 øA 15 øA 13 Td1 8 Vref 2 Vref 11 Td2 18 øB 14 øB 16 B 7 B 5 PG 4 PG 5 NC 12 C3 F1 F2 IC2 IC2 IC1 IC1 IC2 IC2 C1 R7 C2 R8 R5 R6 R9 R11 R10 R12 D1 D2 F4 F3 Shown below is the waveform timing chart of each section Equivalent circuit of STK6712B Drive voltage regulator CI discharge voltage Ec ...

Page 85: ...rd TD62308F Mirror motor M4 MRR MTR Driven by IC4 Logic PC board TD62308F 678 DC 24V DA DA QA QA QB QB DB DB TD62308AP The diagram on the right shows signals impressed to QA QB QA and QB bases in two phase exci tation The ON OFF combination of the transistor is switched The combination of phases to which the current flows is switched Motor rotates Phase A Phase A Phase B Phase B ...

Page 86: ...the surface of the document 3 Arithmetic and control unit Determines the lamp voltage by computation on the basis of AES and K RTN signals etc and outputs the EXP PWM signal to the lamp regulator Note The ON OFF state of the exposure lamp is controlled by a special signal EXPON which is different from the EXP PWM signal 6448 6448 648 Arithmetic and control unit PWA LGC Original Exposure lamp Autom...

Page 87: ...mpressed on the exposure lamp is varied accord ingly a high lamp voltage being impressed when the origi nal is dark and a low lamp voltage when it is light 2 Function of lamp regulator A typical characteristic curve is shown below By means of a phase angle control system it is controlled so that a lamp voltage corresponding to EXP PWM pulse duty ratio input is generated even when some fluctuation ...

Page 88: ...he arithmetic and control unit is composed of the following two blocks 1 EEPROM built in SRAM Consists of IC9 STK10C68 which stores exposure ad justment data to ensure that optimal exposure is performed for each reproduction ratio and for automatic exposure 2 CPU IC10 Incorporates software which computes the voltage to be impressed on the lamp in accordance with such copying modes as photographic ...

Page 89: ...t This DC voltage is compared with the reference voltage made by shaping the pulse signal and is amplified Based on the reference voltage and the input voltage the trigger pulse generation cir cuit generates trigger pulses in synchronism with the frequency of the power supply Controls the conduction angle of the triac The voltage applied across the lamp is kept consistent f f f f PWM Pulse signal ...

Page 90: ... upper and lower paper feeder units G15 G20 Aligning roller lower Aligning roller upper Aligning roller clutch G40 G30 G30 Rear side G Gear Upper paper feeder unit Pick up roller clutch Feed roller clutch G26 G20 G18 G20 Paper feed roller Pick up roller G Gear Lower paper feeder unit turned upside down ...

Page 91: ...ation View as seen from the front 1 Aligning roller upper 2 Aligning roller lower 3 Aligning switch 4 Pick up roller 5 Paper feed roller 6 Separation roller 7 Paper empty switch G30 G20 G18 G20 G26 G30 G40 Aligning roller clutch Pick up roller clutch Feed roller clutch Main motor View as seen from the rear ...

Page 92: ...he electromagnetic clutch for the feed roller is de energized the aligning roller clutch comes ON then the paper is sent to the trans fer process 8 2 2 Paper separation operation Since no paper separation claws are used in the cassette a paper separation roller is installed in side the machine The separation roller section consists of a paper feed roller one way clutch separation roller spring joi...

Page 93: ...er is forced to rotate in the direction of the arrow causing the sheet to be sent toward the aligning roller If as shown two sheets are fed at the same time since the friction between the sheets is smaller the lower sheet is stopped being fed any further while the upper sheet is forced to be transported by the feed roller in the direction of the arrow Feed roller Separation roller 2 1 ...

Page 94: ...Upper paper feed unit 1 Remove the transfer separation charger unit 2 Remove the feed harness cover 1 screw Upper paper feed unit Aligning switch Connector 3 After removing one screw and disconnecting one connector pull the unit out to the front and lift it out Aligning switch 1 Place the upper paper feed unit upside down 2 Remove the paper dust brush 3 Disengage three claws and disconnect one con...

Page 95: ...emove the plate spring 1 screw 2 Snap off the clip 3 While pushing down the claw pull out the bush ing toward the front 4 Disconnect one connector 5 While pushing down the rear claw pull out the bushing toward the rear Clip Plate spring Front side Claw Bushing Connector Claw Clutch ...

Page 96: ... roller lower to be disassembled respectively Also the aligning roller upper can be removed Notes 1 During disassembly be careful not to damage the mylar 2 Pay attention to the orientation of the clutch projection Clutch Setscrew Aligning roller upper Aligning roller lower Mylar Clutch projection ...

Page 97: ...the separation roller The roller unit can be removed by pulling it to ward you Separation roller Holder Separation roller Clutch spring Grip 5 Disconnect two connectors and remove one screw Slide the whole unit toward the front then lower it and pull it out toward you Note that the feed roller can be removed with out taking out the whole unit Just remove the grip and pull out the roller from its s...

Page 98: ...nit toward the front and lower it to remove Remove the rear cover and disconnect one connector from the logic PC board Take the connector out through the window in the rear frame to the front side Empty switch Remove the rail unit 2 screws and a connec tor ...

Page 99: ... Note When reassembling the rail unit make sure that the holder bottle is placed on the rail After pulling out the whole unit to the front side remove one claw and raising the switch dis connect the connector Empty switch Rail Holder bottle ...

Page 100: ...aft Note that the pick up roller and the feed roller are the same parts Clutches Shaft holder Connector Setscrews While lifting each shaft in the direction of the arrow remove each clutch from the shaft holder Disconnect the connector from the bracket Removing one setscrew allows the clutch and the shaft to be separated The pick up roller clutch and the feed roller clutch are the same parts Clutch...

Page 101: ...Main charger LED erasing array Transport guide Drum Separation charger Transfer charger Pre transfer bias guide Process unit LED erasing array Discharge lamp Charging unit Main charger Drum High voltage transformer Lower unit Transfer separation charger Pre transfer bias guide Transfer guide ...

Page 102: ...iminates the residual charge on the drum af ter cleaning LED erasing array Erases the unnecessary parts of the latent im age formed on the drum 9 2 2 Transfer separation chargers Transfer charger Helps transfer the toner image on the drum to the copy paper through a DC high voltage transformer Separation charger Strips the copy paper along with the toner im age from the drum through an AC high vol...

Page 103: ...ge the drum place the unit on the flat surface of a stand 9 3 2 Discharge lamp 1 Remove the process unit 2 Disconnect a connector 3 Disengage two claws and take out the PC board 9 3 3 Main charger unit 1 Remove the process unit 2 Disconnect the one connector 3 Move the entire unit toward the upper to have it disengaged for the rear lock and take it out Note Be careful not to damage the drum Proces...

Page 104: ...Remove the grid by pulling it toward the rear Note Be careful not to touch the shaded area with a bare hand Charge wire Entire length 353 mm tungsten wire 0 06 mm dia Remove the front and rear terminal covers Pinching the hook of the rear terminal cover with cross pliers etc will facilitate the removal LED erasing array Grid Rear side Front side Charge wire Spring hanger Charge wire ...

Page 105: ...the wire with a bare hand Replacing the cleaning pad 1 Remove the charge wire 2 Remove the LED erasing array 3 Move the cleaning pad to the rear side 4 Remove the pad holder snap from the shaft Notes 1 When reassembling pay attention to the direction of the pad holder in which it faces 2 When moved to the rear the pads 2 pcs should be obviously away from the wires Rear side Pad holder Shaft Pad ho...

Page 106: ...ince the charger is pushed up by a spring make sure that it moves up and down freely Replacing the charge wire Entire length 353 mm tungsten wire 0 06 mm dia Disengage the claw of the transfer entrance guide from the rear side Remove the front and rear terminal covers For the separation charger remove the sup porter in addition Note For replacing the cleaning pad the same procedure as for the main...

Page 107: ... allow the wire to kink 4 Don t touch the wire with a bare hand 5 The supporter should be fitted securely in the hook and groove 9 3 7 Damp heater unit Option 1 Remove the transfer separation charger 2 Remove the transport guide one screw 3 Remove one screw securing the damp heater 4 Remove the inner cover lower left and left side cover lower 5 Remove the rear cover 6 Remove a connector Spring han...

Page 108: ...cover and disconnect three connectors 3 Remove one screw 4 Pull the transfer guide toward the front slightly and lift it out Note Be careful not lose the charger push up spring 5 Remove the two hooks and then take out the transfer separation terminal from the front side Connector Transfer guide Springs Transfer separation terminal ...

Page 109: ... 3 9 Main charger terminal 1 Remove the drive unit 2 Remove the gear unit 2 screws 3 After removing the two claws on the front side slide out the main charger terminal to the right Gear unit Claw Front side Claw Main charger terminal Claw ...

Page 110: ...ain processor Digital data Analog Vc D A converter Transfer separation transformer Output current Transfer separation output adjustment value in nV RAM is fed to main processor The main processor outputs control voltage data through the GA to D A converter Analog conversion made by D A converter Control voltage is fed to transfer separation transformer Transfer separation transformer generates out...

Page 111: ... the front rear direction based on the image center are connected to the same bit in parallel Data according to input coordinate for paper size reproduction rate from the logic PC board are fed to LED eraser array by 64 bits effective data are the last 16 bits Data 1 LED ON Data 0 OFF the level on the input pins of IC L7932 of the driver controller Ex When one LED is turned ON at both ends of LED ...

Page 112: ...1550 1560 DRUM 9 12 Mar 1998 TOSHIBA 1 16 48 CLK SI1 LT OUT1 1 2 64 Timing chart ...

Page 113: ...ormer PS HVT Input connector Pin No Signal 1 M VREF 2 HVT M ON 3 G VREF 4 24V 5 DG 6 HVT TR ON 7 TR VREF 8 HVT GB ON 9 HVT SP ON 10 SP VREF Output 1 Charge 500 µA Output 2 Grid 692 V Output 3 Transfer 400 µA Output 4 Separation AC 3 6 kV Output 5 Developer bias 200 V Output 6 Guide bias 1200 V Input connector ...

Page 114: ...98 TOSHIBA 10 1 1550 1560 DEVELOPER Top cover Guide roller Magnetic roller Guide roller 10 DEVELOPER UNIT 10 1 Construction Drum Leveler Mixer 2 Front sectional view Mixer 1 Auto toner sensor Magnetic roller ...

Page 115: ...xer 1 and mixer 2 Toner cartridge drive gear G26 Toner cartridge drive motor 10 2 2 Toner cartridge Developer unit front side Toner cartridge drive motor Drive gear teeth 26 Toner cartridge adding toner Toner is mixed by mixers 1 and 2 f f f Rear side G25 Mixer 2 Mixer 1 Magnetic roller ...

Page 116: ...eloper unit connector 3 Lifting the levers take out the developer unit 10 3 2 Installing the developer material 1 Remove the top cover by rotating the two plate spring hooks in the direction of A and moving the cover in the direction B Note While doing the above be careful not to dam age the seal affixed to the back side of the top cover Developer unit connector Levers A A B ...

Page 117: ...rial into the developer unit 4 Reinstall the top cover after inserting the hooks 4 places firmly fix the plate spring hooks by rotating in the direction of arrow A securely 3 After pouring in the developer material rotate the gear in the direction of the arrow as shown to deliver the developer material onto the mag netic roller Nozzle Plate spring hooks A A ...

Page 118: ...al when installing the top cover the rubber seal should be over the side seals 10 3 3 Removing the developer material While tilting the developer unit let the developer material drain out from the position shown with an arrow Be careful not to allow gears and connec tors nearby to get stained with developer material Rubber seal Side seal ...

Page 119: ...he de veloper unit 2 Remove the leveler adjustment screw and the springs a coil spring and plate spring at the front 3 Remove the front plate 2 screws 4 Replace the guide roller Note When reinstalling the front plate be careful not to allow the harness to be pinched Plate spring Coil spring Front plate Guide roller ...

Page 120: ... and plate spring at the rear 3 Remove the adjuster plate 1 screw Before removing it memorize its original posi tion Remove the rear plate 2 screws 4 Replace the guide roller Notes 1 The guide roller is common for the front and rear sides 2 After reassembly the doctor to sleeve gap and the pole position should be adjusted Coil spring Plate spring Adjuster plate Guide roller ...

Page 121: ...over 2 claws 10 3 6 Auto toner sensor 1 Pour out the developer material from the de veloper unit 2 Place the developer unit upside down and re move the auto toner sensor 1 screw and con nector Process unit cover Toner cartridge drive motor Auto toner sensor 3 Take out the toner cartridge drive motor 1 screw and connector Connector ...

Page 122: ...r 2 adjustment screws 2 coil springs and 2 plate springs Adjustment screw and two springs Adjustment screw and two springs Gear Belt Sleeve drive pulley Seal Magnetic roller bearing 6 Peel off the seal on the front and take out the magnetic roller bearing After removing the magnetic roller from the frame slit move the magnetic roller in the direction of the arrow and take it out toward you Note Af...

Page 123: ...s connected to 24V and pin 2 of Q19 respectively When pin 1 of Q20 becomes L pin 2 of Q19 also becomes L A collector current flows from the 24V supply through the motor windingcausing the motor to ro tate When pin 1 of Q20 becomes H pin 2 of Q19 also becomes H causing the current flowing through the motor winding to flow to the 24V supply through D13 fThe current decreases with a time constant det...

Page 124: ... toner supply Detects that toner in toner cartridge has been used up toner empty Configuration of auto toner circuit Auto sensor Detects toner density Control section Control to maintain toner in developer at a constant specific density Toner motor Replenishes the toner in the developer unit Display unit Displays toner empty status Display unit Toner Toner motor Toner cartridge Control voltage sig...

Page 125: ...ves toner motor auto toner sensor output is not changed toner density does not change judges that there is no toner toner empty Release of toner empty state Toner cartridge replacement drives toner motor auto toner sensor output changes toner density returns to normal value toner empty state is released 2 Operation of auto toner sensor The auto toner sensor is composed of the following circuits Dr...

Page 126: ...etic reluctance Small detection output Large Auto toner output VATS Large When the toner density is high The toner amount in the developer material is more than the required level in comparison with the iron powder carrier Magnetic reluctance Large detection output Small auto toner output V Small DC voltage corresponding to toner density in the developer material auto toner output VATS 648 648 ...

Page 127: ...ain blade recovery blade toner recovery auger toner bag etc For the main charger LED erasing array discharge lamp etc refer to Chapter 9 Front side Rear side View with the drum main charger unit and developer unit removed G25 G Gear Main blade Toner recovery auger Recovery blade View with the drum removed G Gear G63 Rear side G76 Front side ...

Page 128: ...pressure spring Recovery blade Collects the toner scraped off by the main blade Toner recovery auger Transports the toner scraped off to the toner bag on the rear side Toner full switch When the toner bag becomes full of recovered toner the toner recovery auger is forced to the front causing the toner full switch S10 to be turned on Main blade Drum Toner full switch Recovery blade Toner recovery a...

Page 129: ...per unit Remove the main charger unit Disengage the two claws to remove the mo tor cover Main charger unit Motor cover Developer unit Drum shaft Front side Drum Unlock the drum shaft lock by rotating it in the direction of the arrow and then pull the shaft out from the front When removing the drum place your hands on the sides of the drum as shown in the figure on the right and take it out careful...

Page 130: ...he rear side 2 After inserting the drum shaft apply patting powder on the entire surface of the drum and rotate the drum toward you The figure on the right shows the cleaner unit after the developer unit main charger unit and drum are removed from the process unit Smaller gear Rear side Larger gear Front side Drum Cleaner unit ...

Page 131: ...8 TOSHIBA 11 5 1550 1560 CLEANER 11 3 2 Main blade 1 Remove the developer unit main charger unit and drum 3 Remove the holder on the rear 1 screw 4 Remove the blade 2 Remove the spring Main blade Spring Holder ...

Page 132: ...es 1 During reassembly attach the spring securely Make sure that the frame side should look as shown below 11 3 3 Toner full switch 1 Disconnect a connector 2 Remove the switch Blade Collar Connector Toner full switch Frame Spring 2 After installing the drum apply patting power to the drum and rotate it Refer to Sec 11 3 1 ...

Page 133: ...r unit separation claw unit thermistor thermostat lower heat roller cleaning blade heater lamp etc G Gear Rear side Cleaning felt roller View with the fuser guard removed View with the upper heat roller removed Thermostat Thermistor Lower heat roller Cleaning blade Front side Upper heat roller G15 G19 G14 Heater lamp G60 G40 G40 Paper exit roller unit Separation claw unit ...

Page 134: ...rs are always pressed against each other by spring force while the upper unit is closed But when the upper unit is raised they are released from the pressure The copy paper which has finished being fixed is separated smoothly from the upper heat roller with the aid of the separation claws The temperature detection section functions to control the tempera ture of the upper roller by means of a ther...

Page 135: ...nit is tightened at the hole A at the time of shipping from the factory However when tilting the fuser unit in order to correct the inclination of the straight im age retighten the screw at the elongated hole B 12 3 2 Heater lamp 1 Remove the fuser unit 2 Remove the fuser guard 1 screw 3 Remove the screw fastening the terminal on the rear 4 Remove the lamp holder bracket R 1 screw Heater lamp Fuse...

Page 136: ... the Toshiba mark is on the front side 12 3 3 Thermostat thermistor and brush 1 Remove the fuser unit 2 Remove the fuser guard 3 Remove the rear screw of the thermostat 4 Remove the holder unit 2 screws Thermostat Remove one screw to take it out Thermistor Remove one screw to take it out Brush Remove one screw to take it out Lamp holder F Holder unit Thermostat Thermistor Brush Thermistor Thermost...

Page 137: ... roller 2 Remove the separation claw unit 1 screw 12 3 5 Upper heat roller 1 Take out the heater lamp 2 Remove the holder unit 2 screws 3 Remove the stop ring and bushing on the front and then pull out the roller along with its gear toward the rear Note While replacing the roller be careful not to damage the roller surface with metal plate edges or be careful not to deform or dam age the separatio...

Page 138: ...fter setting the lower heat roller in the ma chine check to make sure that the pressure levers are fitted in the bearing grooves at the front and rear 12 3 7 Lower exit roller and paper exit switch 1 Take out the fuser unit 2 Slide the exit roller unit to the front and then take it out toward you 1f2 Paper guide Bearing s groove Pressure lever Lower heat roller Exit roller unit 1 2 ...

Page 139: ...8 Lever caps When installing the lever caps pay attention to their orientations The projection for preventing removal of each lever cap should face front side Lower exit roller Paper exit switch Projection for preventing removal 12 3 9 Separation claws 6 1 Remove the inner cover lower left 1 screw 2 Remove the separation claw unit 1 screw ...

Page 140: ... 3 Remove the upper cover of the separation claw unit 2 screws 4 Remove the bracket from the separation claw unit 4 screws 5 Remove the lower cover 4 screws 1 unit screws 2x2 Take off the six claws from the claw holder Bracket Lower cover ...

Page 141: ...t roller surface tem perature 180 C thermistor resistance value 7 4 KΩ approx Reference Relationship between heat roller surface temperature and thermistor resistance value Temperature Thermistor resistance Heater lamp state Less than 180 C More than 7 4 KΩ ON 180 C 7 4KΩ Maintains previous state More than 180 C Less than 7 4 KΩ OFF C 180 During copying 180 C Heat roller temperature distribution H...

Page 142: ... changesfInput voltage changes Input voltage can be obtained by dividing the pressure of R170 thermistor R27 and R29 The main CPU detects the changes and judges whether the thermistor is normal or not GA IC12 R28 IC10 P35 BSAK R26 C12 R25 R8 R7 5V C13 R27 R29 R170 5V IC2 M62353FP A06 Thermistor DA converter ...

Page 143: ...city 500 sheets 50mm or less Paper Size A3 A5 R Ledger Statement R Paper Weight 64 80 g m2 17 22 lbs Dimensions W 548 x D 506 x H 130 mm W 21 6 x D 19 9 x H 5 1 Weight 8 kg 18 lbs Power Source Supplied from the copier Factory Set Size A3 for Europe User adjustable Ledger for USA Canada Serviceman adjustable Note Specifications are subject to change without notice 548 mm 130 mm MY 1004 ...

Page 144: ... 1 Front sectional view Refer to P2 1 13 2 2 Rear side view Refer to P2 2 13 2 3 Names of the main components View with the rear cover and cassette removed Positioning pin Rear side Jam access cover Paper feeding unit Separation roller Drive PC board Interface harness PFU drive motor Positioning pins Empty switch Positioning pin ...

Page 145: ... CLT Controls the rotation of the P3 I5 Transport roller clutch transport roller CLT6 PKUP2 CLT Controls the rotation of the P2 I4 Pick up roller clutch pick up roller CLT5 FED2 CLT Feed roller clutch Controls the rotation of feed roller P2 I4 S15 PSTP2 SW Detects the paper fed from the P3 I7 Paper stop switch cassette It also detects when the feed clutch is turned OFF S16 EMP2 SW Empty switch Det...

Page 146: ...front 1 Pick up roller 2 Paper feed roller 3 Separation roller 4 Transport roller right 5 Transport roller left 6 Paper stop switch 7 Aligning switch 8 Aligning roller upper 9 Aligning roller lower G20 View as seen from the rear º Drive motor Pick up roller clutch Feed roller clutch Transport roller clutch G18 TB76 P51 P14 P10 G20 G24 G14 P39 ...

Page 147: ... At this time if the copier s aligning switch 7 is off the transport roller clutch maintains an on status until this switch is turned on But if the copier s aligning switch is on the transport roller clutch is deenergized csusing the rollers to stop 4 When the copier s aligning roller is turned off transport roller clutch is turned on the rollers start rotating again At this time since the feed ro...

Page 148: ...paper and close the cover At this time if the paper stop switch 6 continues to be turned on PFU decides that paper still remains in it and does not clear the paper jam status 3 During multicopying from the paper feeding unit PFU if a paper jam occurs inside the PFU all the sheets of paper fed before the jammed sheet will be processed normally ...

Page 149: ...3 4 1 Covers and paper guide A Jam access cover 1 Open the jam access cover 2 Loosen the screw and take out the cover B Rear cover 1 Remove two screws to take out the cover C Paper guide 1 Remove the jam access cover 2 Remove four screws Jam access cover Rear cover Paper guide ...

Page 150: ...OSHIBA 3 Disconnect one connector to take out the guide D Front cover 1 Remove the cassettes of both the copier and the paper feeding unit 2 Unhook the right and left claws of the front cover Front cover Claw View with copier taken off ...

Page 151: ...utch s projection into the groove shown securely and fasten the set screw 2 The clutch harness should be passed under the clutch as shown Door switch 1 Disconnect its connector unhook its claws and the switch can be taken out Transport rollers right left and paper stop switch 1 Remove the transport roller clutch 2 Remove the transport paper guide 3 screws Connector Harness Door switch Connector Tr...

Page 152: ...nsport roller left 5 Take out the paper stop switch along with the guide Notes 1 During reassembly fit the switch har ness into the groove securely 2 When reassembling the switch pay at tention to its orientation 3 When reinstalling the transport paper guide make sure that the plate spring is in contact with the shaft of the trans port roller right securely Paper stop switch Harness Transport roll...

Page 153: ...ull it toward you Note The separation pick up and feed rollers are the same parts as used in the copier Caution During disassembly or reassembly be careful not to lose the spring Pick up and feed rollers 1 Snap off the clips and slide out the pick up roller from its shaft The feed roller can be removed by the same procedure Separation roller Spring Pick up roller Feed roller Clip ...

Page 154: ...move the feed roller 5 Remove the rear cover 6 Remove one screw and then take out the whole unit toward the front Note Since the disassembly and replacement pro cedures for the pick up roller clutch feed roller clutch and pick up roller are the same as for those of the copier refer to para 8 3 2 The screw being removed Roller cover Lower paper feeding unit copier 3 Remove one screw from the lower ...

Page 155: ...from the drive PC board 2 Remove four screws and take out the motor assembly 3 Remove the bracket 2 screws 4 Remove three screws Drive motor Drive PC board Note When installing the motor assembly to the rear frame take the following precaution Tighten respective screws so that the front edge of the damper should be down by 5 6 mm from the frame surface Overtightening can damage the damper Bracket ...

Page 156: ...1998 TOSHIBA 13 4 6 Empty switch 1 Pull out the cassettes from both the copier and the paper feeding unit 2 Remove one screw and take out the switch along with the cover 3 Detach the switch from the cover Switch cover Empty switch ...

Page 157: ... 1 Flow chart YES NO NO YES NO YES YES NO NO YES YES Power ON Checking mode 2 1 Is the cover open Motor and all clutches OFF Is the cover closed Paper stop switch ON Papers in the cassette 1 Paper jam 5 ADD PAPER symbol flashing C1 Have 0 and 9 keys been pressed simultaneously Check ...

Page 158: ... 3 Ready for feeding paper Is the cover open 0 3 sec delay Both feed and pick up roller clutches ON Drive motor ON 3 Ready for feeding paper 5 Have 1 238 sec passed after the feed roller clutch became ON Paper jam Paper stop switch ON C2 Feed roller clutch OFF 0 15 sec delay Pick up roller clutch OFF 0 025 sec delay Transport roller clutch ON ...

Page 159: ...stop switch Delay corresponding to the copier s aligning time Transport roller clutch OFF Is the copier s aligning switch ON Has the copier sent a paper feed request to PFU 3 Paper feeding operation complete Transport roller clutch ON 4 Transport roller clutch OFF Has 0 83 sec elapsed after the preceding copy passed over the PFU s stop switch ...

Page 160: ...560 OPTIONAL 13 18 Mar 1998 TOSHIBA YES NO YES NO NO YES 5 C1 Paper jam Motor and all clutches OFF CLEAR PAPER symbol flashing Is the cover open Is the cover closed Paper stop switch ON CLEAR PAPER symbol OFF ...

Page 161: ... 5 3 75 0 99 3 5 4 49 sec A4 lateral two sheets copying PFU PFU MOT PKUP2 CLT FED2 CLT RGT2 CLT PSTP2 SW RGT1 CLT copier RGT SW copier 0 2 49 3 29 0 84 3 56 2 74 0 32 0 99 0 29 0 99 0 0 0 3 31 3 93 5 6 5 35 1 2 3 4 5 6 7 8 9 10 sec Pick up roller clutch PKUP2 CLT Feed roller clutch FED2 CLT Transport roller clutch RGT2 CLT Paper stop switch PSTP2 SW Aligning roller clutch RGT1 CLT copier Aligning ...

Page 162: ...the paper feeding unit PFU to the copier 1 CST2 installation Tells the copier that PFU is installed The signal becomes L with PFU installed 2 DR SW2 door switch Indicates whether or not the PFU s side cover is open When the cover is closed the door switch is turned on causing the signal to become L 3 FED SW2 paper stop switch Indicates the status of the PFU s paper stop switch When there is paper ...

Page 163: ...t route But while the motor continues to rotate due to its inertia current also tries to continue to flow causing a voltage to be generated between the input and output terminals of the motor Since this voltage is applied between the anode and cathode of D1 the inverse electromotive voltage occurring in the motor is short circuited and restricted 1 The MOT ON2 signal is to cause the motor PFU MOT ...

Page 164: ...Mar 1998 TOSHIBA 13 22 1550 1560 OPTIONAL 13 7 Electric Circuit Diagram and PC Board Assembly 13 7 1 PFU drive circuit diagram ...

Page 165: ...BA 13 23 1550 1560 OPTIONAL 13 7 2 Harness location diagram PWA F PFU CLT5 J102 CLT6 J101 S16 S18 FED2 CLT PKUP2 CLT EMP2 SW SIZE2 SW CLT4 J108 S15 S17 DOOR2 SW PSTP2 SW RGT2 CLT M10 PFU MOT J38 J37 J36 J39 To copier ...

Page 166: ...D FED SW2 VDD DR SW2 GND 24V RGT ON 24V PKUP ON 24V FED ON GND EMP SW2 VDD SIZ 13 SIZ 12 N C SIZ 11 SIZ 10 GND J105 1 J105 2 J105 3 J105 4 J105 5 J105 6 J105 7 S15 S17 CLT4 P STP2 SW DOOR2 SW RGT2 CLT J101 1 J101 2 J102 1 J102 2 S16 EMP2 SW S18 SIZE2 SW WHI WHI WHI WHI WHI WHI WHI RED WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI BLK BLK WHI WHI BLK BLK BLK BLK CLT6 PKUP2 CLT CLT5 FE...

Page 167: ...Mar 1998 TOSHIBA 13 25 1550 1560 OPTIONAL 13 7 4 PC board assembly PWA F PFU ...

Page 168: ...D15 D 0 15 A16 MRR B LNS C LNS B LNS A SCN D SCN C SCN B ALE SCN A WDT ACKB S R57 1 10W4700 VDD RD IC14 7407M IC14 7407M IC14 7407M A16 PLL OK CTR CNT ACKB DF 8 1 F E C B A D 3 2 4 5 6 1 7 8 E D C 8 7 6 3 4 5 B A 2 1 F C 1 2 RTP2 1 R51 1 10W100 1 10W100 R53 1 10W22K R33 R84 1 10W100 HTR RDY STORE D 0 15 5VSWON CS1 CS2 RD WR WR 1 10W100 R54 GND VDD 1 10W22K R69 1 10W4700 R58 R55 1 10W4700 R72 1 10W...

Page 169: ...E CS1 WR RD GARST C49 CC2200P 50 GND 1 10W4700 R117 1 10W4700 R120 R116 1 10W4700 1 10W4700 R150 VDD GARST VDD D 0 15 VDD SCN5 SCN1 SCN3 1 10W22K R130 R153 1 10W22K 1 10W22K R131 R154 1 10W22K R134 1 10W22K 1 10W22K R155 R156 1 10W22K 1 10W22K R121 1 10W22K R122 R133 1 10W22K 1 10W22K R158 R138 1 10W22K R119 1 10W22K 1 10W22K R118 R108 1 10W22K 1 10W22K R107 LED DAT GND 1 10W4700 R166 R167 1 10W47...

Page 170: ...OTBRK MOTDIR GND PKUP CLT2 C40 CC0 1 25 C 2 1 PKUPCLT MRR A MRR C MRR B MRR MOT D MRR MOT C MRR MOT B RGTCLT FEDCLT FED CLT CTR ON PKUP CLT MRR D MRR C MRR B MRR A CTR ON PKUPCLT FEDCLT RGTCLT LNS B LNS C LNS D LNS A CS2 A 0 15 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 WRRAM CSSRAM STORE STORE RD GND VDD CS2 A 0 15 A16 D 0 15 A16 RGTCLT2 RGTCLT2 F...

Page 171: ...SS193 2 3 1 10W4700 R111 RTP 1 2 E5 DUMMY 1 2 TNR MOT OPT F ON OPT F ON OPT FAN F E3 DUMMY 2 1 TNR MOT R163 1 10W1000 RTP 1 2 R104 1 10W4700 RTP 2 1 1SS193 D9 3 2 1 10W10K R103 RTP 2 1 Q13 4700 RN1401 4700 2 3 1 OPTON OPTON 5VSW Q11 2SC2873Y 1 3 2 Q12 RN2401 4700 4700 3 2 1 R100 1 10W1000 RTP 1 2 DG 1 10W4700 R101 RTP 1 2 GND OPT H L OPT H L 24V R162 1 10W4700 RTP 2 1 2SC2873Y Q19 2 3 1 TNRMOT TNR...

Page 172: ...01 4700 1 3 2 Q1 4700 RN1401 4700 1 3 2 5VSW Q3 RN2401 4700 4700 1 2 3 GND TH VDD GND CC0 1 25 C11 C 1 2 R10 1 10W2700 RTP 2 1 CC0 1 25 C10 C 2 1 GND HTR ON 24V SCN H SCN L 1 10W4700 R14 RTP 2 1 R12 1 10W4700 RTP 1 2 1 10W4700 R13 RTP 2 1 1 10W4700 R35 RTP 2 1 R31 1 10W4700 RTP 2 1 SCN D SCN B SCN C SCN A 1 10W180 R9 RTP 1 2 C1 CE22 35 1 2 IC7 6712MK3 SG PG VCC VREF0 A VREF1 NA B NB TB0 TB1 OA ONA...

Page 173: ... CC2200P 50 C22 C 1 2 GND 5VSWON 1 10W1000 R75 RTP 2 1 R62 1 10W1000 RTP 1 2 GND GND C23 CC0 1 25 C 2 1 C21 CC0 1 25 C 2 1 CE4 7 16 C3 1 2 C31 CC0 1 25 C 2 1 GND GND C5 CE22 16 1 2 IC20 14538F VDD QB QA NQB NQA GND2 GND1 GND0 CX RXB CX RXA CLRB CLRA BB BA AB AA 4 12 5 11 3 13 2 14 1 8 15 7 9 6 10 16 R42 1 10W4700 RTP 1 2 GND WDT IC16 HC 00F MC74 1 2 3 1SS193 D5 3 2 GND IC16 HC 00F MC74 12 13 11 R6...

Page 174: ...DD K RTN7 K RTN6 K RTN5 K RTN4 K RTN3 K RTN2 K RTN1 K RTN0 SCN5 SCN4 SCN3 SCN2 SCN1 SCN0 CTR CNT CTR SIG DSP RST DSP ON0 DSP ON1 T CTR DSP LTH DSP SCK DSP DAT GND MRR HOM MRR HOM AES VIN AES VIN GND ERS ON VDD C64 CC0 1 50 C 1 2 ATS VREF ATS VIN ATS VREF ATS VIN TNR MOT TNR FULL TNR FULL DEV SW DEV SW TNR MOT LED CN ON LED LTH LED SCK C52 CC0 1 25 C 1 2 RXE185 R1 2 1 DRM THM MRR24V RGT SW SIZ05 SI...

Page 175: ... 1 25 C 2 1 GND CC0 1 25 C46 C 1 2 C51 CC0 1 25 C 2 1 CC0 1 25 C50 C 1 2 C59 CC0 1 25 C 2 1 C60 CC0 1 25 C 2 1 CC0 1 25 C45 C 1 2 C42 CC0 1 25 C 2 1 SORTER 53324 9 J1 7 6 5 4 2 1 3 8 9 MOT ON MOT BRK STXD SRXD S CNT S REQ SACK REQ S ACKB S GND ACKB DF DFTXD DFRXD DF CNT REQ DF DF REQ DFACK SACK S REQ REQ S S CNT SRXD STXD ACKB S ACKB DF DFRXD DFTXD REQ DF DF REQ DFACK DF CNT MOT DIR PLL OK MOT BRK...

Page 176: ... R179 RTP 1 2 R148 1 10W4700 RTP 2 1 CC1000P 50 C26 C 1 2 R88 1 10W4700 RTP 2 1 1 10W4700 R89 RTP 1 2 R90 1 10W4700 RTP 2 1 1 10W4700 R96 RTP 1 2 1 10W4700 R97 RTP 1 2 R98 1 10W4700 RTP 2 1 1 10W4700 R99 RTP 1 2 R102 1 10W4700 RTP 2 1 R74 1 10W4700 RTP 2 1 1 10W4700 R73 RTP 1 2 R72 1 10W4700 RTP 2 1 1 10W4700 R71 RTP 1 2 1 10W4700 R58 RTP 1 2 R57 1 10W4700 RTP 2 1 1 10W4700 R56 RTP 1 2 1 10W4700 R...

Page 177: ... 1 10W22K R133 RTP 2 1 R122 1 10W22K RTP 1 2 R121 1 10W22K RTP 1 2 1 10W22K R156 RTP 2 1 R155 1 10W22K RTP 1 2 1 10W22K R134 RTP 2 1 1 10W22K R154 RTP 2 1 R131 1 10W22K RTP 1 2 1 10W22K R153 RTP 2 1 R130 1 10W22K RTP 1 2 SCN3 SCN1 SCN5 VDD D 0 15 VDD GARST VDD R150 1 10W4700 RTP 1 2 1 10W4700 R116 RTP 2 1 R120 1 10W4700 RTP 1 2 R117 1 10W4700 RTP 1 2 GND CC2200P 50 C49 C 1 2 GARST RD WR CS1 ALE FE...

Page 178: ... MOT ON2 MOTON2 E4 DUMMY 1 2 MOT BRK MOT DIR FED CLT2 PKUP CLT2 IC15 7407M 13 7 14 12 IC15 7407M 9 7 14 8 IC15 7407M 5 7 14 6 IC15 7407M 3 7 14 4 IC15 7407M 1 7 14 2 MOTDIR MOTBRK GND C40 CC0 1 25 C 2 1 MRR D MRR C MRR B MRR A CTR ON PKUPCLT FEDCLT RGTCLT LNS B LNS C LNS D LNS A CSSRAM WRRAM STORE RD GND VDD CS2 A 0 15 A16 D 0 15 RGTCLT2 FEDCLT2 PKUPCLT2 RGT CLT2 RGT CLT FED CLT T CTR K CTR MRR MO...

Page 179: ... 1 2 OPT H L GND R101 1 10W4700 RTP 2 1 Q12 RN2401 4700 4700 1 2 3 2SC2873Y Q11 2 3 1 OPTON Q13 4700 RN1401 4700 1 3 2 1 10W4700 R104 RTP 1 2 1 10W1000 R163 RTP 2 1 TNR MOT E3 DUMMY 1 2 OPT F ON E5 DUMMY2 1 R111 1 10W4700 RTP 2 1 1 10W10K R110 RTP 2 1 Q15 4700 RN1401 4700 2 3 1 Q16 2SC2873Y 1 3 2 Q18 RN2401 4700 4700 3 2 1 1 10W4700 R112 RTP 1 2 GND R114 1 10W15K RTP 1 2 ATSVREF ATSVIN ATS VREF 1 ...

Page 180: ...3 2 Q1 4700 RN1401 4700 1 3 2 Q3 RN2401 4700 4700 1 2 3 GND VDD GND R10 1 10W2700 RTP 2 1 CC0 1 25 C10 C 2 1 GND 1 10W4700 R14 RTP 2 1 R12 1 10W4700 RTP 1 2 1 10W4700 R13 RTP 2 1 1 10W4700 R35 RTP 2 1 R31 1 10W4700 RTP 2 1 SCN D SCN B SCN C SCN A 1 10W180 R9 RTP 1 2 C1 CE22 35 1 2 IC7 6712MK3 SG PG VCC VREF0 A VREF1 NA B NB TB0 TB1 OA ONA OB ONB 5 4 1 9 13 11 15 14 16 8 10 2 3 6 7 R15 1 10W4700 RT...

Page 181: ... 1 2 GND CC2200P 50 C22 C 1 2 GND 5VSWON 1 10W1000 R75 RTP 2 1 R62 1 10W1000 RTP 1 2 GND GND C23 CC0 1 25 C 2 1 C21 CC0 1 25 C 2 1 CE4 7 16 C3 1 2 C31 CC0 1 25 C 2 1 GND GND C5 CE22 16 1 2 5VSWON IC20 14538F VDD QB QA NQB NQA GND2 GND1 GND0 CX RXB CX RXA CLRB CLRA BB BA AB AA 4 12 5 11 3 13 2 14 1 8 15 7 9 6 10 16 EXP R42 1 10W4700 RTP 1 2 GND WDT WDT IC16 HC 00F MC74 1 2 3 1SS193 D5 3 2 GND IC16 ...

Page 182: ...K RTN5 K RTN4 K RTN3 K RTN2 K RTN1 K RTN0 SCN5 T CTR SCN0 VDD K RTN7 K RTN6 K RTN5 K RTN4 K RTN3 K RTN2 K RTN1 K RTN0 SCN5 SCN4 SCN3 SCN2 SCN1 SCN0 CTR CNT CTR SIG DSP RST DSP ON0 DSP ON1 T CTR DSP LTH DSP SCK DSP DAT GND MRR HOM MRR HOM AES VIN AES VIN GND ERS ON VDD ATS VREF ATS VIN ATS VREF ATS VIN TNR MOT TNR FULL DEV SW DEV SW LED CN ON LED LTH LED SCK DRM THM MRR24V RGT SW SIZ05 SIZ01 RGT SW...

Page 183: ...62 C 1 2 GND EXP ON EXP PWM CC0 1 25 C61 C 1 2 VDD VDD GND VDD CC0 1 25 C43 C 1 2 CC0 1 25 C9 C 1 2 CC0 1 25 C36 C 1 2 C30 CC0 1 25 C 2 1 CC0 1 25 C35 C 1 2 C66 CC0 1 25 C 2 1 VDD GND C20 CC0 1 25 C 2 1 CC0 1 25 C56 C 1 2 C47 CC0 1 25 C 2 1 C44 CC0 1 25 C 2 1 GND CC0 1 25 C46 C 1 2 C51 CC0 1 25 C 2 1 CC0 1 25 C50 C 1 2 C59 CC0 1 25 C 2 1 C60 CC0 1 25 C 2 1 CC0 1 25 C45 C 1 2 C42 CC0 1 25 C 2 1 SOR...

Page 184: ...Mar 1998 TOSHIBA 14 17 1550 1560 CIRCUIT DIAGRAMS How to search for where a signal in a circuit diagram has jumped to HINT 14 2 Power Supply Circuit PWA F PWR ...

Page 185: ...1550 1560 CIRCUIT DIAGRAMS 14 18 Mar 1998 TOSHIBA How to search for where a signal in a circuit diagram has jumped to HINT 14 3 Control Panel Circuit PWA F PNL 1 4 ...

Page 186: ...Mar 1998 TOSHIBA 14 19 1550 1560 CIRCUIT DIAGRAMS How to search for where a signal in a circuit diagram has jumped to HINT Control Panel Circuit PWA F PNL 2 4 ...

Page 187: ...1550 1560 CIRCUIT DIAGRAMS 14 20 Mar 1998 TOSHIBA How to search for where a signal in a circuit diagram has jumped to HINT Control Panel Circuit PWA F PNL 3 4 ...

Page 188: ...Mar 1998 TOSHIBA 14 21 1550 1560 CIRCUIT DIAGRAMS Control Panel Circuit PWA F PNL 4 4 ...

Page 189: ...1550 1560 CIRCUIT DIAGRAMS 14 22 Mar 1998 TOSHIBA 14 4 Fuser Circuit PWA F FUS ...

Page 190: ...ICs etc 5VE Power supply for LED eraser array DCH 24VA Power supply for the main motor M1 24VB Power supply for clutches and high voltage transformer 24VC Power supply for the optional sorter 24VD Power supply for the optional ADF 2 AC outputs For driving the heater lamp For driving the lamp regulator 3 Other control signals Zero cross output Zero cross interrupting signals AC OFF signal Reset sig...

Page 191: ...g back fluctuation in the output to the primary side through a photocoupler 2 DC 5V The 5V system is for providing a regulated 5V output by stabilizing the voltage from the 5V winding by means of a 3 terminal regulator The following shows the output sequence of the power supply ON OFF AC inputs 5V 24V ACOFF Zero cross 500ms or less 4 75V or more 21 6V or more 0 5ms or less 4 75V or more 10ms or mo...

Page 192: ...Mar 1998 TOSHIBA 16 1 1550 1560 PC BOARD 16 PC BOARD ASSEMBLY 16 1 PWA F LGC 16 2 PWA F FUS 100V series 200V series ...

Page 193: ...1550 1560 PC BOARD 16 2 Mar 1998 TOSHIBA 16 3 PWA F PNL 16 5 PWA F LRG 100V series 200V series 16 4 PWA F AES ...

Page 194: ...Thermo Fuse THERMOSTAT Lamp Regulator Switching Regulator Door Switch MAIN Switch PWA F FUS FUSE Power Plug PTC PTC Thermostat Damp Heater L Damp Heater U1 PTC Damp Heater U2 17 HARNESS CONNECTION DIAGRAM 17 1 AC Harness Connection Diagram AC Control Circuit ...

Page 195: ... 16 17 18 19 20 21 22 23 24 LED CN ON 24V GNDE 5VE LED SCK LED DAT LED LTH GND VDD 24V ERS ON J10 1 2 3 4 5 6 7 8 9 10 11 12 MOT FG VDD MOT DIR PLL OK MOT BRK MOT ON GND VDD EXP PWM EXP ON GND J9 1 2 3 4 5 6 7 8 9 10 11 12 24V TNR TNR MOT TNR FULL GND DEV SW GND ATS VREF 24V ATS VIN DG DRM THMS GND 13 14 15 16 17 18 19 20 21 22 23 24 SP VREF HVT SP ON HVT GB ON TR VREF HVT TR ON DG 24V G VREF HVT ...

Page 196: ...S MOT A 13 14 15 16 17 18 19 20 21 22 23 24 LED CN ON 24V GNDE 5VE LED SCK LED DAT LED LTH GND VDD 24V ERS ON J10 1 2 3 4 5 6 7 8 9 10 11 12 MOT FG VDD MOT DIR PLL OK MOT BRK MOT ON GND VDD EXP PWM EXP ON GND J9 1 2 3 4 5 6 7 8 9 10 11 12 24V TNR TNR MOT TNR FULL GND DEV SW GND ATS VREF 24V ATS VIN DG DRM THMS GND 13 14 15 16 17 18 19 20 21 22 23 24 SP VREF HVT SP ON HVT GB ON TR VREF HVT TR ON DG...

Page 197: ... Set up instruction 2 Open the plastic bag and holding the lifting bands take out the machine from the carton 3 Remove all packing materials from the outside and inside of the machine 4 Pull out the cassette and take out the packing material located at the front side 5 Remove the screw fastening the carriage Note For the screw fastening the carriage a coin screw is used So after loosening it with ...

Page 198: ...ll the copy receiving tray by fitting it into the holes in the left side cover 6 Open the front cover Open the front cover and raise the upper unit 7 Install the fuser unit lever caps 2 The lever caps are provided in the acces sory package Securely fit the lever caps onto front and rear levers Copy receiving tray ...

Page 199: ...it 1 screw 4 Place the process unit on a flat surface Raise the lever located on each side of the process unit in the direction of the arrow 5 Pull out one connector 6 Take out the developer unit from the proc ess unit Note If the photoconductor is exposed to fluorescent light or external light for long time it may suffer from light caused fatigue So be sure to cover the process unit with for exam...

Page 200: ...e di rection of the arrows to disengage them and then remove the top cover 10 Reinstall the top cover The two hooks should be securely latched Make sure that the top cover is securely closed Also make sure that the rubber seal of the top cover is positioned outside of the side seals both sides 11 After placing the developer unit in the proc ess unit move down the lever on each side by 90 to fix th...

Page 201: ...sor is shown on the display and changes quickly 4 About 2 minutes and 30 seconds later the value on the display stabilizes at 23 25 5 About 30 seconds later the automatic ad justment of the auto toner sensor is com plete and UA is shown on the copy quan tity display Also the ADD TONER is displayed 6 Open the front cover and install the toner cartridge 7 Close the front cover If the adjustment has ...

Page 202: ...b Loosening the screw of the adjustment plate corresponding with the position of the uneven light distribution adjust the plate If you move it toward the left copy im age becomes darker and if you move it toward the right copy image becomes lighter c If the rear side of the copy is too dark and gradually lighter toward the front adjust the adjustment plates as shown on the right lower d Make a cop...

Page 203: ...oo low reduce the value by using the ZOOM DOWN 50 key 10 Press the INTERRUPT key to cause the new value on the display to be memo rized After you press the key the display re turns to AJ Press the ENERGY SAVER key to make a test copy 11 If the image density is not appropriate re peat steps 7 10 above 2 2 Adjustment of manual exposure 50 154 and 200 Note Before performing manual exposure ad justmen...

Page 204: ...nit respectively move to the positions corresponding to the four reproduction ratios making the expo sure lamp also to light four times Note Do not touch the machine while it is performing automatic exposure ad justment 4 When the display changes to AJ the au tomatic adjustment is complete 5 Make copies at the respective reproduction ratios and check the image density In the AJ mode simply press t...

Page 205: ...re 154 6 f 50 7 g 200 8 h Light max 100 9 i Dark min 100 10 j 100 14 k Photo exposure 154 15 l 50 16 m 200 17 C C C D C E Adjustment Procedure 1 Make sure that AJ is shown on the display 2 Set exposure mode C 3 Set reproduction ratio D using the REDUCE ENLARGE ZOOM DOWN 50 or ZOOM UP 200 4 To check the current image density make test copies in the manual automatic and photo modes and check them fo...

Page 206: ...sired size Before moving the side guides push the lever in the direction of A to unlock the side guides Before moving the trail edge guide push on its sides in the direction of B to unlock the guide 2 Take out the paper size plate from the cassette and reset it to show the desired size on the dis play 3 Place the paper on the cassette and check the gaps between the paper and the side guides 4 Inse...

Page 207: ...ill 4 Install the new toner cartridge in the machine Push the toner cartridge fully in until it is locked securely 5 Close the front cover Procedure for Installing the Toner Cartridge 1 Open the front cover and pushing the lock le ver take out the toner cartridge from the front side 2 Shake the new toner cartridge to the right and to the left 5 or 6 times to loosen the toner in side ...

Page 208: ...and take out the package 1 and the paper guide 0 2 Remove packing materials and take out the paper feeding unit MY 1004 1 0 8 9 6 The following parts are included in the pack age 1 Tapping screws M4 x 8 3 pcs 8 Screws M4 x 6 5 pcs 9 Separation roller pressure spring 1 pc Fixing plates 4 pcs Reference The applicable model is the ED 1550 3 Remove packing material 6 ...

Page 209: ...ned with the MY 1004 s positioning pins Notes 1 When docking the MY 1004 with the copier aligning the front and right hand surfaces of the copier with those of the MY 1004 respectively will make the installation easier 2 Before the copier and the MY 1004 are fastened with screws 4 places do not move or carry them to another place 2 Removing the covers 1 Remove the rear cover of the MY 1004 2 screw...

Page 210: ...plate and screws 8 9 provided fasten the copier and the MY 1004 as shown in the Figure One place at the front Two places on the rear One place on the feed side 4 Installing the wire harness 1 Fit the wire harness on the rear of the MY 1004 into the respective edge saddles of the copier and the MY 1004 and connect the harness to the J6 connector of the copi er s PC board 9 8 8 8 ...

Page 211: ...section and outer panel section joined by magnets Separate them when installing the paper guide 2 Insert the separation roller pressure spring provided into the hole in the separa tion roller holder at the feed side of the MY 1004 3 Plug the connector of the paper guide º into the connector J36 from the feed side of the MY 1004 J36 ...

Page 212: ...tlet and turn on the power switch 2 Set sheets of paper in the MY 1004 s cas sette 3 Selecting the MY 1004 s cassette make a few copies and check that the MY 1004 operates normally 4 Fasten the paper guide º using the fixing screws 9 provided as shown 4 places Note When fastening the paper guide º check to make sure that the separation roller pressure springs are fitted in the separation roller ho...

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