Canon PC980 Service Manual - Page 338

CHAPTER 11 TROUBLESHOOTING 23 The lens fails to turn on. Cause Lens solenoid (SL3) Step 1 Checks Does the lens solenoid (SL3) turn on when the power switch is turned on? Lens cable, Pulley, Rail 2 Are the lens cable, pulley, and rail normal? 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 the composite power supply PCB. Is the meter reading about 24 V? 4 Replace the scanner/lens drive motor (M2). Is the problem corrected? YES/NO NO NO NO Action Check the wiring from J109 on the DC controller PCB to SL3; if normal, replace SL3. Check the lens cable, pulley, and rail; as necessary, clean the cable and adjust its tension. See "DC power fails to turn on." YES End. NO Replace the DC controller PCB. 24 The fixing heater fails to turn on. Cause DC controller PCB Composite power supply PCB Step 1 2 Checks Is 'E0' indicated? Replace the DC controller PCB. Is the problem corrected? YES/NO YES YES Action See the descriptions under "E0." End. NO Replace the composite power supply PCB. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-73