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C. Troubleshooting Faulty Images
1. The copy is too light (half-tone only).
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-49
CHAPTER 10 TROUBLESHOOTING
Cause
AE mechanism
Developing
assembly
Scanner
Drum cartridge
Checks
Perform the Basic Image
Adjustment Procedure. Is the
problem corrected?
Make copies in AE mode. Is the
density too low, i.e., is the copy
too light?
Is the developing cylinder coated
with a uniform layer of toner?
Clean the mirror, lens, and dust-
proofing glass. Is the problem
corrected?
Step
1
2
3
4
Results
YES
YES
NO
YES
NO
Action
End.
Perform AE adjustment.
Replace the developing
assembly.
End.
Replace the drum
cartridge.