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Chapter 4 Image Formation System discusses the principles of maintenance/inspection, standards/ adjustments, and problem identification (image fault/malfunction). It also explains the timing at which image formation-related mechanisms are operated, ...replaced parts and consumables/durables and scheduled servicing charts. Appendix contains a general timing chart and general circuit diagrams. COPYRIGHT © 1999 CANON INC. Chapter 10 Maintenance and Servicing provides tables of operation used for the machine's pickup/feeding system. Chapter 3 Exposure System discusses the...
Chapter 4 Image Formation System discusses the principles of maintenance/inspection, standards/ adjustments, and problem identification (image fault/malfunction). It also explains the timing at which image formation-related mechanisms are operated, ...replaced parts and consumables/durables and scheduled servicing charts. Appendix contains a general timing chart and general circuit diagrams. COPYRIGHT © 1999 CANON INC. Chapter 10 Maintenance and Servicing provides tables of operation used for the machine's pickup/feeding system. Chapter 3 Exposure System discusses the...
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... SENSOR CIRCUIT DIAGRAM A-29 I . BLANK EXPOSURE (rear) CIRCUIT DIAGRAM A-34 N. SOLVENTS/OILS A-36 viii COPYRIGHT © 1999 CANON INC. Points to Note for Servicing 11-4 II. Making Initial Checks ....... 11-48 B. ADF 11-83 F. SIGNALS AND ABBREVIATIONS A-3 C. SPECIAL TOOLS... A-35 O. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) TROUBLESHOOTING FEEDING PROBLEMS 11-75 A. Variable Resistors (VR) and Check Pins by PCB .......... 11-84 VII. SENSOR ...
... SENSOR CIRCUIT DIAGRAM A-29 I . BLANK EXPOSURE (rear) CIRCUIT DIAGRAM A-34 N. SOLVENTS/OILS A-36 viii COPYRIGHT © 1999 CANON INC. Points to Note for Servicing 11-4 II. Making Initial Checks ....... 11-48 B. ADF 11-83 F. SIGNALS AND ABBREVIATIONS A-3 C. SPECIAL TOOLS... A-35 O. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) TROUBLESHOOTING FEEDING PROBLEMS 11-75 A. Variable Resistors (VR) and Check Pins by PCB .......... 11-84 VII. SENSOR ...
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... lux (ordinary lighting) for 5 min and then is exposed to light of the sun are usually about 10000 to rotate the drum, be affected. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM 2. Cleaning the Drum Caution: As a rule,... flannel cloth coated with toner. If you need to 30000 lux. 4-24 COPYRIGHT © 1999 CANON INC. Caution: 1. Do not use a flannel cloth. However, avoid exposing it will cause no practical problem. Otherwise, the leaf spring used to apply a developing bias to the developing cylinder will recover to ...
... lux (ordinary lighting) for 5 min and then is exposed to light of the sun are usually about 10000 to rotate the drum, be affected. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM 2. Cleaning the Drum Caution: As a rule,... flannel cloth coated with toner. If you need to 30000 lux. 4-24 COPYRIGHT © 1999 CANON INC. Caution: 1. Do not use a flannel cloth. However, avoid exposing it will cause no practical problem. Otherwise, the leaf spring used to apply a developing bias to the developing cylinder will recover to ...
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... Main motor (M1) Registration clutch solenoid (SL2) Delivery sensor (PS3) Fixing heater (H1) Scanner Heater OFF Heater ON Forward Reverse Figure 6-107 COPYRIGHT © 1999 CANON INC. To prevent possible problems, power to the fixing heater is stopped between Sheets When the copying speed is controlled to 6 cpm...
... Main motor (M1) Registration clutch solenoid (SL2) Delivery sensor (PS3) Fixing heater (H1) Scanner Heater OFF Heater ON Forward Reverse Figure 6-107 COPYRIGHT © 1999 CANON INC. To prevent possible problems, power to the fixing heater is stopped between Sheets When the copying speed is controlled to 6 cpm...
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...machine unprotected. e. The photosensitive drum is exposed to put it in a protective box or put a cover over it will not cause practical problems. Nevertheless, avoid direct sunshine. (The rays of protection. Reference: If the photosensitive drum is susceptible to strong light for the photosensitive drum shutter...provided as a means of the sun is as strong as possible if such a problem is out of reach of white spots or vertical bands), however, may not disappear. the memory (i.e., cause of children. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-5 ...
...machine unprotected. e. The photosensitive drum is exposed to put it in a protective box or put a cover over it will not cause practical problems. Nevertheless, avoid direct sunshine. (The rays of protection. Reference: If the photosensitive drum is susceptible to strong light for the photosensitive drum shutter...provided as a means of the sun is as strong as possible if such a problem is out of reach of white spots or vertical bands), however, may not disappear. the memory (i.e., cause of children. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-5 ...
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............. 11-84 VII. ADF 11-30 C. Lamp, Heater, Motor, Etc. 11-81 D. SELF DIAGNOSIS 11-86 COPYRIGHT © 1999 CANON INC. Making Initial Checks ....... 11-48 B. Sample Image Faults ....... 11-52 C. Troubleshooting Malfunctions 11-61 V. Switches 11-80 C. ADF 11-83... Image Adjustment Basic Procedure 11-3 B. Points to Note for Servicing 11-4 II. STANDARDS AND ADJUSTMENTS 11-5 A. Mechanical 11-5 B. TROUBLESHOOTING FEEDING PROBLEMS 11-75 A. Faulty Feeding 11-78 VI. ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 11-79 A. Sensors and Solenoids .... 11-79 B.
............. 11-84 VII. ADF 11-30 C. Lamp, Heater, Motor, Etc. 11-81 D. SELF DIAGNOSIS 11-86 COPYRIGHT © 1999 CANON INC. Making Initial Checks ....... 11-48 B. Sample Image Faults ....... 11-52 C. Troubleshooting Malfunctions 11-61 V. Switches 11-80 C. ADF 11-83... Image Adjustment Basic Procedure 11-3 B. Points to Note for Servicing 11-4 II. STANDARDS AND ADJUSTMENTS 11-5 A. Mechanical 11-5 B. TROUBLESHOOTING FEEDING PROBLEMS 11-75 A. Faulty Feeding 11-78 VI. ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 11-79 A. Sensors and Solenoids .... 11-79 B.
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... covers are not closed fully? Otherwise, go through the steps: answer the questions under "Checks"; CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-1 Study the following for an idea of a specific problem, see the "Cause" column. Cause Power plug Covers Power source Step 1 2 3 4 Checks... Is the rated voltage found flow charts. Close the door or the cover. COPYRIGHT © 1999 CANON INC. Is the rated voltage present between J11 and -2? (J1 is absent. If the problem is "AC power is absent," you want to find out the cause (possible fault) of how to...
... covers are not closed fully? Otherwise, go through the steps: answer the questions under "Checks"; CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-1 Study the following for an idea of a specific problem, see the "Cause" column. Cause Power plug Covers Power source Step 1 2 3 4 Checks... Is the rated voltage found flow charts. Close the door or the cover. COPYRIGHT © 1999 CANON INC. Is the rated voltage present between J11 and -2? (J1 is absent. If the problem is "AC power is absent," you want to find out the cause (possible fault) of how to...
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.../900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Connect the negative probe. 11-2 COPYRIGHT © 1999 CANON INC. CHAPTER 11 TROUBLESHOOTING Is the power 1 plug connected to connect the positive probe of the meter and "-," the negative probe. YES Connect the plug.... door and the delivery cover NO Close the door closed firmly? YES 3 Is the rated voltage present at the NO Advise the user that the problem power source? Connect the positive probe. is not the copier's. YES Rest omitted. • Often, you are expected to the NO power outlet? ...
.../900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Connect the negative probe. 11-2 COPYRIGHT © 1999 CANON INC. CHAPTER 11 TROUBLESHOOTING Is the power 1 plug connected to connect the positive probe of the meter and "-," the negative probe. YES Connect the plug.... door and the delivery cover NO Close the door closed firmly? YES 3 Is the rated voltage present at the NO Advise the user that the problem power source? Connect the positive probe. is not the copier's. YES Rest omitted. • Often, you are expected to the NO power outlet? ...
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...roller for dirt. The machine must be near a water faucet, water boiler, humidifier) or dust. The copy density adjusting lever is caused by Canon? Checking the Transfer Charging Roller a. Copy Paper a. Try paper fresh out of the sun. (As necessary, instruct the user to high temperature... b. The machine must not be exposed to direct rays of package. 11-48 COPYRIGHT © 1999 CANON INC. Checking the Originals Check the originals to find out whether the problem in pencil tend to produce copies with poor contrast; a. Originals with a red tint tend to produce copies...
...roller for dirt. The machine must be near a water faucet, water boiler, humidifier) or dust. The copy density adjusting lever is caused by Canon? Checking the Transfer Charging Roller a. Copy Paper a. Try paper fresh out of the sun. (As necessary, instruct the user to high temperature... b. The machine must not be exposed to direct rays of package. 11-48 COPYRIGHT © 1999 CANON INC. Checking the Originals Check the originals to find out whether the problem in pencil tend to produce copies with poor contrast; a. Originals with a red tint tend to produce copies...
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... When a machine is brought in question. If condensation is opened before it has been brought from a cold place (e.g., warehouse) to cause feeding faults. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) d. The cartridge can occur inside it, leading to be cold (high OPC electrical... has become used to the room temperature (one to warm place. c. Instruct the user so that the cartridge is likely to various problems; tion can develop condensation if it is noted, dry wipe the parts in from a cold to two hours). 11-50 COPYRIGHT © 1999...
... When a machine is brought in question. If condensation is opened before it has been brought from a cold place (e.g., warehouse) to cause feeding faults. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) d. The cartridge can occur inside it, leading to be cold (high OPC electrical... has become used to the room temperature (one to warm place. c. Instruct the user so that the cartridge is likely to various problems; tion can develop condensation if it is noted, dry wipe the parts in from a cold to two hours). 11-50 COPYRIGHT © 1999...
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...check in a short time to be moist. Mount the transfer charging roller correctly. 2. Replace the transfer charging roller. 1. End. Is the problem corrected? Check the transfer high-voltage terminal contacts for electrical continuity. 2. Replace the electric unit (composite power supply PCB, DC controller PCB). ...paper. Replace the cartridge. Check the composite power supply and the DC controller PCB. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-53 Is the problem corrected? Is it 0Ω? Instruct the user on the transfer lower guide plate and...
...check in a short time to be moist. Mount the transfer charging roller correctly. 2. Replace the transfer charging roller. 1. End. Is the problem corrected? Check the transfer high-voltage terminal contacts for electrical continuity. 2. Replace the electric unit (composite power supply PCB, DC controller PCB). ...paper. Replace the cartridge. Check the composite power supply and the DC controller PCB. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-53 Is the problem corrected? Is it 0Ω? Instruct the user on the transfer lower guide plate and...
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...density correction switch (SW101) or the density adjusting lever set to step 2). Check the developing assembly. 11-54 COPYRIGHT © 1999 CANON INC. Is the problem corrected? YES 1. Mount the transfer charging roller correctly. 2. Is the toner image on the photosensitive drum before transfer more or less ...machine's top unit? YES/NO Action YES End. Set the cartridge in the middle of a copying run, and open the machine. End. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) NO 1. Is there electrical continuity between the PCB of the base of...
...density correction switch (SW101) or the density adjusting lever set to step 2). Check the developing assembly. 11-54 COPYRIGHT © 1999 CANON INC. Is the problem corrected? YES 1. Mount the transfer charging roller correctly. 2. Is the toner image on the photosensitive drum before transfer more or less ...machine's top unit? YES/NO Action YES End. Set the cartridge in the middle of a copying run, and open the machine. End. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) NO 1. Is there electrical continuity between the PCB of the base of...
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.... YES Remove the foreign matter, or replace the transfer charging roller. NO Replace the cartridge. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-55 Clean the transfer guide assembly. Is the problem corrected? YES End. Static eliminator Transfer charging roller 3 Clean the static eliminator. YES End. Shake...) 11 The copy has white lines. (vertical) Cause Fixing assembly Cartridge Step 1 2 Checks Turn off the power in the transfer charging roller assembly? Is the problem corrected? COPYRIGHT © 1999 CANON INC.
.... YES Remove the foreign matter, or replace the transfer charging roller. NO Replace the cartridge. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-55 Clean the transfer guide assembly. Is the problem corrected? YES End. Static eliminator Transfer charging roller 3 Clean the static eliminator. YES End. Shake...) 11 The copy has white lines. (vertical) Cause Fixing assembly Cartridge Step 1 2 Checks Turn off the power in the transfer charging roller assembly? Is the problem corrected? COPYRIGHT © 1999 CANON INC.
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...NO Action Try a recommend type. If the results are good, ask the user to step 3. 1. Is the transfer guide assembly soiled? Check the varistor. 4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Instruct the user on all copies? YES/NO NO YES YES NO Action Go...is soiled. Clean the pickup guide assembly and the delivery roller. 11-56 COPYRIGHT © 1999 CANON INC. Adjust the tension of package. Is the feeding assembly soiled? Scanner rail 3 Is the problem noted at the same position on the correct method of the paper soiled? Is the back of storing...
...NO Action Try a recommend type. If the results are good, ask the user to step 3. 1. Is the transfer guide assembly soiled? Check the varistor. 4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Instruct the user on all copies? YES/NO NO YES YES NO Action Go...is soiled. Clean the pickup guide assembly and the delivery roller. 11-56 COPYRIGHT © 1999 CANON INC. Adjust the tension of package. Is the feeding assembly soiled? Scanner rail 3 Is the problem noted at the same position on the correct method of the paper soiled? Is the back of storing...
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... the pickup roller, pickup clutch, and cassette. YES End. (p. 11-6) Is the problem corrected? Are the results the same? normal? (See the instructions on ." Check the solenoid (SL2) operate normally? (SL2). 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-57 Check... the fixing film and the fixing lower roller for scratches. Is the problem vertical and, in addition, in the form of a recommended type? YES...
... the pickup roller, pickup clutch, and cassette. YES End. (p. 11-6) Is the problem corrected? Are the results the same? normal? (See the instructions on ." Check the solenoid (SL2) operate normally? (SL2). 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-57 Check... the fixing film and the fixing lower roller for scratches. Is the problem vertical and, in addition, in the form of a recommended type? YES...
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...the scanning lamp flicker? Scanning system Feeding system 3 Make a reduced copy, and compare it move forward/in Direct. End. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 18 The copy has a blurred image. Does ...the copy paper spring up or stop around the transfer assembly? Check the feeding system. 11-58 COPYRIGHT © 1999 CANON INC. Route the cable correctly. 2. Check the highvoltage transformer (composite power supply PCB). Move the No. 1 mirror mount slowly by hand...
...the scanning lamp flicker? Scanning system Feeding system 3 Make a reduced copy, and compare it move forward/in Direct. End. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 18 The copy has a blurred image. Does ...the copy paper spring up or stop around the transfer assembly? Check the feeding system. 11-58 COPYRIGHT © 1999 CANON INC. Route the cable correctly. 2. Check the highvoltage transformer (composite power supply PCB). Move the No. 1 mirror mount slowly by hand...
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... AU JAPON) 11-59 Does the drum drive gear rotate normally? Remove the opening seal. Replace the cartridge COPYRIGHT © 1999 CANON INC. Is the problem corrected? End. Replace the cartridge. Check the contacts for foreign matter, and clean it happens to be warping. 2. Is the ...cartridge. Clean the scanning lamp, reflecting plate, mirror, and lens. YES/NO YES YES NO NO YES NO Action Correct the light image problem first. 1. Is the horizontal ratio in Direct within specification? Check the copyboard cover too see if it . CHAPTER 11 TROUBLESHOOTING 20 The...
... AU JAPON) 11-59 Does the drum drive gear rotate normally? Remove the opening seal. Replace the cartridge COPYRIGHT © 1999 CANON INC. Is the problem corrected? End. Replace the cartridge. Check the contacts for foreign matter, and clean it happens to be warping. 2. Is the ...cartridge. Clean the scanning lamp, reflecting plate, mirror, and lens. YES/NO YES YES NO NO YES NO Action Correct the light image problem first. 1. Is the horizontal ratio in Direct within specification? Check the copyboard cover too see if it . CHAPTER 11 TROUBLESHOOTING 20 The...
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...the thermistor (TH1) normal? 2 Is there electrical continuity between J207-1 and -2 on the fixing heater side? 3 Replace the fixing upper unit. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 2 E000 Cause Thermistor (TH1) Heater, Fuse (FU2) Thermistor (TH1)... PCB and the wiring to the thermistor (TH1). NO Replace the DC controller PCB. 11-62 11-62 COPYRIGHT © 1999 CANON INC. Is the problem corrected? 4 Replace the composite power supply PCB. if normal, replace the fixing assembly upper unit. End. Is the...
...the thermistor (TH1) normal? 2 Is there electrical continuity between J207-1 and -2 on the fixing heater side? 3 Replace the fixing upper unit. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 2 E000 Cause Thermistor (TH1) Heater, Fuse (FU2) Thermistor (TH1)... PCB and the wiring to the thermistor (TH1). NO Replace the DC controller PCB. 11-62 11-62 COPYRIGHT © 1999 CANON INC. Is the problem corrected? 4 Replace the composite power supply PCB. if normal, replace the fixing assembly upper unit. End. Is the...
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...the main motor driver PCB to the fixing heater; End. if normal, see "DC power fails to turn on the power switch. Is the problem corrected? Turn on ." Replace the main motor (M1). Heater, Fuse (FU2) 2 Is there electrical continuity between J901-1 (+) and -2 (-) ...on the DC controller PCB normal? COPYRIGHT © 1999 CANON INC. Is the problem corrected? 4 Replace the composite power supply PCB. End. Thermistor (TH1) Composite power supply PCB DC controller PCB 3 Replace the fixing assembly upper...
...the main motor driver PCB to the fixing heater; End. if normal, see "DC power fails to turn on the power switch. Is the problem corrected? Turn on ." Replace the main motor (M1). Heater, Fuse (FU2) 2 Is there electrical continuity between J901-1 (+) and -2 (-) ...on the DC controller PCB normal? COPYRIGHT © 1999 CANON INC. Is the problem corrected? 4 Replace the composite power supply PCB. End. Thermistor (TH1) Composite power supply PCB DC controller PCB 3 Replace the fixing assembly upper...
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... the high-voltage contact PCB. Is the transfer charging roller or the contact faulty? Correct the highvoltage contacts of a copying run? Is the problem corrected? NO Replace the DC controller PCB. 7 The keys on the control panel are locked. ('E202') Cause Scanner home position sensor (PS1..., replace PS1. Replace the transfer charging roller. YES End. Replace the DC controller PCB. 11-64 11-64 COPYRIGHT © 1999 CANON INC. Check the wiring between the highvoltage contacts of the machine's top and bottom units normal? Does the high-voltage cable have scratches or...
... the high-voltage contact PCB. Is the transfer charging roller or the contact faulty? Correct the highvoltage contacts of a copying run? Is the problem corrected? NO Replace the DC controller PCB. 7 The keys on the control panel are locked. ('E202') Cause Scanner home position sensor (PS1..., replace PS1. Replace the transfer charging roller. YES End. Replace the DC controller PCB. 11-64 11-64 COPYRIGHT © 1999 CANON INC. Check the wiring between the highvoltage contacts of the machine's top and bottom units normal? Does the high-voltage cable have scratches or...