Canon PC980 Service Manual - Page 335

CHAPTER 11 TROUBLESHOOTING 17 Pickup fails. (multifeeder) Cause Wrong operation Main motor (M1) Paper placement Multifeeder pickup solenoid (SL4), Pickup clutch solenoid (SL1) DC controller PCB Step 1 2 3 4 Checks Is the multifeeder selected on the control panel? Does the main motor (M1) rotate when the Copy Start key is pressed? Is the paper placed in the multifeeder correctly? Set the meter range to 30 VDC, and connect the meter probes as indicated. Does the voltage change to about 24 V in keeping with pickup operation? Multifeeder pickup solenoid (SL4) Pickup clutch solenoid (SL1) + J109-8 J109-4 Table 11-403 J109-7 J109-3 YES/NO NO NO NO NO YES Action Instruct the user on the correct way of operating the machine. See "The main motor fails to rotate." Instruct the user on the correct way of placing paper. Check the wiring from the solenoid to the DC controller PCB; if normal, replace the solenoid in question. Replace the DC controller PCB. 18 Pickup fails. (single-feeder) Cause Main motor (M1) Single-feeder paper sensor (PS5) DC controller PCB Step 1 2 Checks Does the main motor rotate when the Copy Start key is pressed? Is the single-feeder paper sensor (PS5) normal? YES/NO NO NO YES Action See "The main motor fails to rotate." Check the wiring from J113 to PS5 on the DC control PCB; if normal, replace PS5. Replace the DC controller PCB. 11-70 11-70 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)