Service Manual
Page 311
... CP23 CPGND1 Figure 11-270 2) After replacing the DC controller PCB, measure the voltage as before replacement. 11-46 COPYRIGHT © 1999 CANON INC. Adjusting the Reproduction Ratio (fine adjustment) Adjust the reproduction ratio if you have replaced the following: • DC controller PCB Making ... 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 ...
... CP23 CPGND1 Figure 11-270 2) After replacing the DC controller PCB, measure the voltage as before replacement. 11-46 COPYRIGHT © 1999 CANON INC. Adjusting the Reproduction Ratio (fine adjustment) Adjust the reproduction ratio if you have replaced the following: • DC controller PCB Making ... 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
... (SL2) DC controller PCB Step 1 2 Checks Does the main motor (M1) start to rotate when the Copy Start key is pressed? 4 Set the meter range to 30 VDC. if normal, replace Q751. CHAPTER 11 TROUBLESHOOTING 19 The scanner fails to move smoothly? Check the wiring from J109 on the... p. 11-47.) Replace the scanner/lens drive motor (M2). COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-71 End. No Replace the DC controller PCB. Is the meter reading about 24 V for a moment after the Copy Start key is pressed? Yes/No ...
... (SL2) DC controller PCB Step 1 2 Checks Does the main motor (M1) start to rotate when the Copy Start key is pressed? 4 Set the meter range to 30 VDC. if normal, replace Q751. CHAPTER 11 TROUBLESHOOTING 19 The scanner fails to move smoothly? Check the wiring from J109 on the... p. 11-47.) Replace the scanner/lens drive motor (M2). COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-71 End. No Replace the DC controller PCB. Is the meter reading about 24 V for a moment after the Copy Start key is pressed? Yes/No ...
Service Manual
Page 337
...control PCB, and set the tester range to 1kΩ. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) YES/NO NO YES Action Check the harness; Is the meter reading about 20 Ω? if normal, replace the side blanking PCB. Does the index ...supply PCB. 11-72 11-72 COPYRIGHT © 1999 CANON INC. NO Replace the fuse (FU1). NO Check the wiring between the DC controller PCB and the composite power supply PCB; then, connect the meter probes to both terminals of the meter swing? YES/NO Action NO Mount the scanning lamp ...
...control PCB, and set the tester range to 1kΩ. Is the problem corrected? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) YES/NO NO YES Action Check the harness; Is the meter reading about 20 Ω? if normal, replace the side blanking PCB. Does the index ...supply PCB. 11-72 11-72 COPYRIGHT © 1999 CANON INC. NO Replace the fuse (FU1). NO Check the wiring between the DC controller PCB and the composite power supply PCB; then, connect the meter probes to both terminals of the meter swing? YES/NO Action NO Mount the scanning lamp ...
Service Manual
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... corrected? See "DC power fails to SL3; COPYRIGHT © 1999 CANON INC. YES/NO NO NO NO Action Check the wiring from J109 on the DC controller PCB to turn on." YES End. NO Replace the composite power supply PCB. Is the meter reading about 24 V? 4 Replace the scanner/lens drive motor (M2... when the power switch is turned on the composite power supply PCB. DC power supply Scanner/lens drive motor (M2) DC control PCB 3 Set the meter range to the 30 VDC, and connect J202-2 (+) and -1 (-) on ? Is the problem corrected? Check the lens cable, pulley, and rail...
... corrected? See "DC power fails to SL3; COPYRIGHT © 1999 CANON INC. YES/NO NO NO NO Action Check the wiring from J109 on the DC controller PCB to turn on." YES End. NO Replace the composite power supply PCB. Is the meter reading about 24 V? 4 Replace the scanner/lens drive motor (M2... when the power switch is turned on the composite power supply PCB. DC power supply Scanner/lens drive motor (M2) DC control PCB 3 Set the meter range to the 30 VDC, and connect J202-2 (+) and -1 (-) on ? Is the problem corrected? Check the lens cable, pulley, and rail...
Service Manual
Page 339
... the DC controller PCB to turn on how to turn off . if normal, replace the sensor in step 1 normal? (For instructions on ." Is the meter reading about 24 V? Is the problem corrected? as necessary, clean the cable and adjust its tension. Replace the DC controller PCB. 11-74 11-74 COPYRIGHT... © 1999 CANON INC. Set the meter range to 30 VDC, and connect the meter probes to turn off . if normal, replace the PS4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) NO Replace the DC...
... the DC controller PCB to turn on how to turn off . if normal, replace the sensor in step 1 normal? (For instructions on ." Is the meter reading about 24 V? Is the problem corrected? as necessary, clean the cable and adjust its tension. Replace the DC controller PCB. 11-74 11-74 COPYRIGHT... © 1999 CANON INC. Set the meter range to 30 VDC, and connect the meter probes to turn off . if normal, replace the PS4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) NO Replace the DC...