Canon FY8-23AV-000 manual Troubleshooting by Image Fault, Yes

CHAPTER 3 IMAGE TROUBLESHOOTING

C. Troubleshooting by Image Fault

1.The copy is too light (halftone areas only).

2.The copy is too light (dark areas as well).

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

	Cause	Step	Checks	YES/NO	Remedies
Lens, Reflecting plate,		1	Clean the lens, reflecting plate,	YES	End.
Intensity sensor			and intensity sensor.
			Is the problem corrected?
		2	Press the Copy Start key, and	NO	Go to step 5.
			switch the copier OFF in the
			middle of operation; then, open
			the top cover.
			Is the toner image on the pho-
			tosensitive drum more or less
			normal before transfer?
			Be sure to check quickly to
			protect the drum against light.
	Transfer charging	3	Is the transfer charging roller	NO	1. Re-attach the charging
	roller		normal?		roller.
					2. Replace the charging
					roller.
Transfer	Copy paper	4	Try paper fresh out of package.	YES	1. The paper may be
			Is the copy density higher?		moist; advise the user
					on the correct method
					of storage.
					2. Advise the user that the
					use of non-recom-
					mended paper may not
					bring about the best
					results.
Cartridge		5	Replace the cartridge.	YES	End.
			Is the problem corrected?
DC controller/DC				NO	Replace the DC controller/
power supply PCB					DC power supply PCB.

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