Troubleshooting Faulty Images; The Copy Is Too Light (Half-Tone Only) - Canon NP6218 Service Manual

C. Troubleshooting Faulty Images

1. The copy is too light (half-tone only).

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