Canon FY8-13EX-000, NP6218 service manual Copy is foggy overall, 10-53

CHAPTER 10 TROUBLESHOOTING

6. The copy is foggy (overall).

Cause	Step	Checks	Results	Action
	1	Perform the Basic Image	YES	End.
		Adjustment Procedure. Is the
		problem corrected?
Scanner	2	Clean the scanning lamp, reflect-	YES	End.
		ing plate, side reflecting plate,
		mirror, lens, and dust-proofing
		glass. Is the problem corrected?
Pre-exposure	3	Does the pre-exposure lamp turn	NO	See “The pre-exposure
lamp, DC		on during copying operation?		lamp fails to turn on.”
controller PCB
Developing	4	Is the developing spacer worn?	YES	Replace the developing
spacer				assembly.
Developing	5	Is the developing cylinder worn?	YES	Replace the developing
cylinder				assembly.
Developing	6	Is the developing cylinder	NO	Check the parts around
cylinder		insulated from the copier GND?		the developing cylinder
		Turn off the power supply, and		and the developing
		disconnect J908. Check the		connector.
		continuity with the meter between

the developing and copier sides of J908-2.

Drum cartridge

Composite power supply

PCB

7Is the reading for ‘No. 105’ in service mode (primary charging current) 10 µA or less?

NO	Replace the drum
	cartridge.
YES	Replace the composite
	power supply PCB.

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-53