Canon PC940 Service Manual - Page 320

CHAPTER 11 TROUBLESHOOTING 7 The copy is foggy vertically. 8 The copy has black lines. (vertical, fuzzy, thick) 9 The copy has black lines. (vertical, fine) Cause Scanner Transfer guide assembly Cartridge Step 1 2 Checks Clean the scanning lamp, reflecting plate, lens, and mirror. Is the problem corrected? Clean the transfer guide assembly. Is the problem corrected? 3 Take out and then set the cartridge once again. Is the problem corrected? YES/NO Action YES End. YES End. YES End. NO Replace the cartridge. 10 The copy has white spots. (vertical) 11 The copy has white lines. (vertical) Cause Fixing assembly Cartridge Step 1 2 Checks Turn off the power in the middle of a copying run, and open the machine's top unit. Does the copy image before moving through the fixing assembly have white spots or white lines? Shake the cartridge several times. Is the problem corrected? Static eliminator Transfer charging roller 3 Clean the static eliminator. Is the problem corrected? 4 Is there foreign matter or scratches in the transfer charging roller assembly? Cartridge YES/NO Action YES Check the fixing assembly. YES Inform the user that the cartridge is running out of toner. YES End. YES Remove the foreign matter, or replace the transfer charging roller. NO Replace the cartridge. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-55