Canon PC940 Service Manual - Page 342

CHAPTER 11 TROUBLESHOOTING 2 Separation/Feeding Assembly Cause Copy paper Feeding assembly Step 1 2 3 Checks Try paper recommended by Canon. Is the problem corrected? Is the copy paper curled, wavy, or otherwise deformed? Is there foreign matter in the feeding assembly? Feed belt, Roller Static eliminator Pre-registration roller paper sensor (Q751) Registration roller 4 Is the feed belt rotating properly? 5 Is the static eliminator soiled with toner or the like? 6 Does the pre-registration roller paper sensor operate normally? 7 Is the registration roller worn, deformed, or soiled? Registrationrelated spring, Spring clutch of registration assembly YES/NO YES YES Action Ask the user to use recommended paper. Replace the paper. YES Instruct the user on the correct method of storing paper. NO Remove the foreign matter. YES Check the belt and the roller. NO Replace the sensor or the lever. YES Clean the static eliminator. If dirt is found, clean with alcohol; if wear or deformation is found, replace it. NO 1. Check the spring used to control registration. 2. Check the spring clutch of the registration assembly. 3 Fixing/Delivery Assembly Cause Inlet guide Fixing lower roller, Fixing film Delivery paper detecting lever Delivery sensor (PS3) Delivery roller drive assembly Leading edge margin Step 1 2 3 4 5 Checks Is the fixing inlet guide soiled with toner? Is the fixing lower roller or the fixing film deformed or scratched? Does the delivery detecting lever move smoothly? Does the delivery sensor operate normally? Does the delivery roller operate smoothly? YES/NO YES YES NO NO Action Clean the guide with solvent. Replace the roller or the fixing assembly upper unit. Make adjustments so that it moves smoothly. Replace the sensor. NO Check the delivery roller drive assembly. YES Check the leading edge of copy paper for margin. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-77