Canon NP6218 The copy is too light black solid also, The copy is too light overall, extremely

CHAPTER 10 TROUBLESHOOTING

2.The copy is too light (black solid also).

3.The copy is too light (overall, extremely).

Transfer

Cause	Step	Checks	Results	Action
	1	Perform the Image Basic	YES	End.
		Adjustment Procedure. Is the
		problem corrected?
	2	Turn off the power switch during	NO	Go to step 7.
		copying operation, and open the
		front door. Is the toner image on
		the photosensitive drum before
		transfer more or less normal?
Transfer	3	Is the transfer charging roller	NO	Re-insert the transfer
charging		securely inserted?		charging roller.
roller
	4	Is electrical leakage noted on the	YES	Check the transfer
		transfer charging roller?		charging roller.
	5	Is dirt, crack, or scratch noted on	YES	Replace the transfer
		the transfer charging roller?		charging roller.
	6	Are the position and condition of	NO	Correct or replace the
		the pressure spring of the transfer		spring.
		charging roller normal?
Copy paper	7	Try fresh copy paper. Is the		1. The paper may be
		problem corrected?		moist; advise the
				user on the correct
				way of storing paper
				2. Advise the user that
				the use of paper not
				of a type
				recommended by
				Canon may produce
				images falling short
				of expectations.
Lower trans-	8	Set the feeding assembly in	YES	Check if the lower
fer guide		feeding position, and measure the		transfer guide is in
		resistance between the lower		contact with a metal
		transfer guide and the base		portion (e.g., side plate
		(metal) of the transfer charging		of the feeding assembly).
		assembly rail. Is the resistance 0
High-voltage			NO	1. Check the electrical
		Ω?
cord, high-				continuity of the high-
voltage				voltage cord.
transformer,				2. Check the high-
DC con-
				voltage transformer
troller PCB
				and the DC controller
				PCB.

10-50 COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)