The Copy Has A White Spot (Vertical); The Copy Has A White Line (Vertical) - Canon iR2200 Service Handbook

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

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 follow-
ing: COPIER>PG>TYPE. Does the output image have a white line/spot?
NO:
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 eliminator.
Developing assembly
4) Is the coating of toner on the developing cylinder even?
NO:
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.
•
Exposure system, Standard white plate
8) Clean the copyboard glass (stander white plate) and the mirrors. Is the
problem corrected?
YES: End.
NO:
4-16
Go to step 7.
If the problem is still not corrected, replace the transfer charging
roller or the separation static eliminator.
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."
Be sure to identify the cause of the scratch.
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.