Canon FY8-13EX-000, NP6218 Copy has white spot vertical Copy has white lines vertical, 10-55

CHAPTER 10 TROUBLESHOOTING

10.The copy has white spot (vertical).

11.The copy has white lines (vertical).

Cause	Step	Checks	Results		Action
Fixing	1	Make a copy with the copyboard	NO	1.	Clean the inlet guide
assembly		cover lifted, and turn off the power			(upper, lower) of the
		switch while the paper is moving			fixing assembly.
		through the feeding assembly. Are		2.	Check the upper
		white spots or liens noted on the			fixing unit.
		copy before it moves through the
		fixing assembly?
Primary	2	Execute ‘No. 402’ in service mode	YES	End.
charging roller		(primary charging roller cleaning).
		Is the problem corrected?
Transfer	3	Execute ‘No. 409’ in service mode	YES	End.
charging roller		(transfer roller cleaning). Is the
		problem corrected?
	4	Is dirt, cracks, or scratches noted	YES	Replace the transfer
		on the transfer charging roller?		charging roller.
	5	Are the position and condition of	NO	Correct or replace the
		the transfer charging roller		spring.
		pressure spring normal?
Static	6	Clean the static eliminator. Is the	YES	End.
eliminator		problem corrected?
Developing	7	Is the developing cylinder coated	NO	Take out the developing
assembly		with a uniform layer of toner?		assembly, and shake it
				several times. If the
				problem is not corrected,
				replace the developing
				assembly.
Copy paper	8	Try fresh copy paper. Is the	YES	The copy paper may be
		problem corrected?		moist; advise the user
				on the correct method of
				storing paper.
Photosensitive	9	Are there scratches around the	YES	Replace the drum
drum		photosensitive drum?		cartridge. (Be sure to
				investigate the cause of
				the scratches.)
Light from			NO	Check if the photosensi-
outside				tive drum is exposed to
				light from outside.

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-55