Service Manual
Page 311
...Figure 11-270 2) After replacing the DC controller PCB, measure the voltage as before replacement. 11-46 COPYRIGHT © 1999 CANON INC. then, turn on the power; CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 4. Adjusting the Reproduction Ratio (fine...Before Starting the Work • Meter 1) Before replacing the DC controller PCB, turn VR106 on the DC controller PCB, and measure the voltage. + probe ........CP23 - then, connect the meter probes to CP23 and GND on the DC controller PCB so that the reading is the same as in step...
...Figure 11-270 2) After replacing the DC controller PCB, measure the voltage as before replacement. 11-46 COPYRIGHT © 1999 CANON INC. then, turn on the power; CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING 4. Adjusting the Reproduction Ratio (fine...Before Starting the Work • Meter 1) Before replacing the DC controller PCB, turn VR106 on the DC controller PCB, and measure the voltage. + probe ........CP23 - then, connect the meter probes to CP23 and GND on the DC controller PCB so that the reading is the same as in step...
Service Manual
Page 336
...the DC controller PCB change to about 24 V? No Check the position of the scanner rail for dirt, foreign matter, or object which may interfere. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-71 Is the scanner rail soiled? YES/NO NO NO NO NO YES...(Q751) normal? (For instructions on the composite power supply PCB. Yes Check the wiring from J109 on ." Is the meter reading about 24 V for a moment after the Copy Start key is pressed? 4 Set the meter range to check the photointerrupers, see p. 11-47.) 3 Does the registration clutch solenoid (SL2) turn on the DC...
...the DC controller PCB change to about 24 V? No Check the position of the scanner rail for dirt, foreign matter, or object which may interfere. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-71 Is the scanner rail soiled? YES/NO NO NO NO NO YES...(Q751) normal? (For instructions on the composite power supply PCB. Yes Check the wiring from J109 on ." Is the meter reading about 24 V for a moment after the Copy Start key is pressed? 4 Set the meter range to check the photointerrupers, see p. 11-47.) 3 Does the registration clutch solenoid (SL2) turn on the DC...
Service Manual
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... replace the composite power supply PCB. 11-72 11-72 COPYRIGHT © 1999 CANON INC. Is the meter reading about 20 Ω? Set the meter range to 1 kΩ, and connect the meter probes to both terminals of the meter swing? NO Replace the fuse (FU1). CHAPTER 11 TROUBLESHOOTING 21 The blanking lamp ...Cause Side blanking PCB DC controller PCB Step 1 Checks Remove J106 from th ecomposite power supply PCB, and set the meter range to 1 kΩ; then, connect the meter probes to 1kΩ. YES/NO NO YES Action Check the harness; Does the tester index swing when the probes ...
... replace the composite power supply PCB. 11-72 11-72 COPYRIGHT © 1999 CANON INC. Is the meter reading about 20 Ω? Set the meter range to 1 kΩ, and connect the meter probes to both terminals of the meter swing? NO Replace the fuse (FU1). CHAPTER 11 TROUBLESHOOTING 21 The blanking lamp ...Cause Side blanking PCB DC controller PCB Step 1 Checks Remove J106 from th ecomposite power supply PCB, and set the meter range to 1 kΩ; then, connect the meter probes to 1kΩ. YES/NO NO YES Action Check the harness; Does the tester index swing when the probes ...
Service Manual
Page 338
...on." if normal, replace SL3. See "DC power fails to turn on. Replace the DC controller PCB. NO Replace the composite power supply PCB. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-73 DC power supply Scanner/lens drive motor (M2) DC control PCB 3... DC controller PCB. 24 The fixing heater fails to SL3; Lens cable, Pulley, Rail 2 Are the lens cable, pulley, and rail normal? Is the meter reading about 24 V? 4 Replace the scanner/lens drive motor (M2). Check the lens cable, pulley, and rail; YES/NO YES YES Action See the descriptions...
...on." if normal, replace SL3. See "DC power fails to turn on. Replace the DC controller PCB. NO Replace the composite power supply PCB. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-73 DC power supply Scanner/lens drive motor (M2) DC control PCB 3... DC controller PCB. 24 The fixing heater fails to SL3; Lens cable, Pulley, Rail 2 Are the lens cable, pulley, and rail normal? Is the meter reading about 24 V? 4 Replace the scanner/lens drive motor (M2). Check the lens cable, pulley, and rail; YES/NO YES YES Action See the descriptions...
Service Manual
Page 339
...8226; Single-feeder paper sensor (PS5) • Pre-registration roller paper sensor (Q751) • Delivery sensor (PS3) Is the sensor checked in question. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Is the vertical path roller paper sensor (PS4) normal? (For instructions on how to...controller PCB. 26 The "Jam" message fails to turn on the composite power PCB. Is the meter reading about 24 V? Replace the DC controller PCB. 11-74 11-74 COPYRIGHT © 1999 CANON INC. as necessary, clean the cable and adjust its tension. NO Check the wiring from the ...
...8226; Single-feeder paper sensor (PS5) • Pre-registration roller paper sensor (Q751) • Delivery sensor (PS3) Is the sensor checked in question. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Is the vertical path roller paper sensor (PS4) normal? (For instructions on how to...controller PCB. 26 The "Jam" message fails to turn on the composite power PCB. Is the meter reading about 24 V? Replace the DC controller PCB. 11-74 11-74 COPYRIGHT © 1999 CANON INC. as necessary, clean the cable and adjust its tension. NO Check the wiring from the ...