Canon NP6218, FY8-13EX-000 service manual Copy is blank, Copy is solid black, 10-62

CHAPTER 10 TROUBLESHOOTING

21. The copy is blank.

Cause	Step	Checks	Results	Action
Drum cartridge	1	Is the drum cartridge securely	NO	Insert the drum
		inserted?		cartridge.
Drum drive	2	Is the drum cartridge rotating	NO	1. Check if the
assembly		during copying operation?		photosensitive drum
				rotates smoothly.
				2. Check the drum drive
				assembly.
Transfer charg-	3	Is the transfer charging roller	NO	Re-insert the transfer
ing assembly		securely inserted?		roller.
	4	Is electrical leakage noted on	YES	Check the transfer
		the transfer charging roller?		charging roller.
Composite	5	Is the reading in ‘No. 105’ of	YES	Replace the composite
power supply		service mode (primary charg-		power supply PCB.
PCB		ing current) 10 µA or less?

22. The copy is solid black.

Cause	Step	Checks	Results	Action
	1	Does the scanning lamp remain	NO	Make checks according
		on during copying operation?		to the descriptions under
				“The scanning lamp fails
				to turn on.”
	2	Does the pre-exposure lamp turn	NO	Make checks according
		on during copying operation?		to the descriptions under
				“The pre-exposure lamp
				fails to turn on.”
Composite	3	Is the reading in ‘No. 105’ of	YES	Replace the composite
power supply		service mode (primary charging		power supply PCB.
PCB		current) 10 µA or less?

10-62 COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)