Canon PC980 Service Manual - Page 333

CHAPTER 11 TROUBLESHOOTING 15 DC power fails to turn on. Cause AC power supply Wiring, DC load Step 1 2 Checks Is AC power present between J201-1 and -2 on the composite power supply PCB? Turn off the power switch, and disconnect J202 and J205 from the composite power supply PCB. Set the meter range to 30 VDC, and turn on the power switch. Is the voltage between the following terminals normal? YES/NO NO YES Connector Pin Output Remarks J202 1 GND To DC 2 24V controller 3 5V PCB 4 5V 5 GND 6 24V J205 1 - To main 2 - motor 3 GND driver 4 24V PCB Action See "AC power fails to turn on." See the descriptions under "E0." Fuse Composite power supply PCB Table 11-401 3 Is the fuse (FU102) on the composite power supply PCB blown? 120V model: 125 V, 5 V 220/240V model: 250 V, 2.5 A YES Remove the cause of the problem, and replace the fuse. NO Replace the composite power supply PCB. 11-68 11-68 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)