Canon iR2200 Series, Service Manual

Page: 475 / 768

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
4-7 T
3 Troubleshooting Image Faults
3.1 The copy is too light (halftone area only).
1) Perform the Image Adjustment Basic Procedure. Is the problem cor-
rected?
Check to make sure that the placement of the pattern print when the follow-
ing is executed in service mode is correct: FUNCTION>DENS>PD-ME.
YES: End.
AE adjustment
2) Make copies in AE mode. Is the text too light?
YES: Execute AE adjustment:
Decrease the setting of the following in service mode:
COPIER>ADJUST>AE>AE-TBL.
Developing assembly
3) Are the block members of the developing assembly in contact with the
photosensitive drum?
NO: Check the developing assembly locking lever. Check the surface of
the developing assembly block members for foreign matter (toner).
Developing assembly
4) Is the coating on the developing cylinder even?
NO: Check the developing assembly.
Scanner, Photosensitive drum
5) Clean the mirrors and lenses. Is the problem corrected?
YES: End.
NO:
Replace the drum unit.