COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
4-16 T
3.10 The copy has a white spot (vertical).3.11 The copy has a white line (vertical).
Exposure system
1) Generate a halftone test print in service mode. Enter ‘4’ to the following:
COPIER>PG>TYPE. Does the output image have a white line/spot?
NO: Go to step 7.
dirt (lint) 2) Is there dirt (lint) in the drum unit or around the laser optical path of the
developing assembly?
YES: Remove the dirt (lint).
Transfer charging roller, Separation static eliminator
3) Is the transfer charging roller or the separation static eliminator soiled or
coated with foreign matter?
YES: Clean the transfer charging roller or the separation static elimina-
tor. If the problem is still not corrected, replace the transfer charg-
ing roller or the separation static eliminator.
Developing assembly
4) Is the coating of toner on the developing cylinder even?
NO: Check the edge of the developing assembly. If the developing as-
sembly is without toner, see the descriptions under “The Add Toner
message fails to go ON.”
Fixing film 5) Is there a scratch in the peripheral direction of the fixing film?
YES: Replace the fixing film unit
Fixing assembly inlet
6) Is there dirt or foreign matter on the fixing assembly inlet?
YES: Clean the inlet.
Photosensitive drum
7) Is there a scratch in the peripheral direction of the photosensitive drum?
YES: Replace the drum unit.
• Be sure to identify the cause of the scratch.
Exposure system, Standard white plate
8) Clean the copyboard glass (stander white plate) and the mirrors. Is the
problem corrected?
YES: End.
NO: Change the setting in the following service mode to change the
point of shading measurement: FUNCTION>SHDG-POS. If the
problem is not corrected after several attempts, replace the
copyboard glass.