Samsung SCX-4200 manual Signs and Measures of Poor toner cartridge

Troubleshooting

6.5.4 Signs and Measures of Poor toner cartridge

	Fault	Signs	Cause & Check	Solution
Light image and		• The printed image	1. If the image is light or dirty	1. All of 1, 2, 3
partially blank		is light or dirty and	and untidy - Shake the toner	If image quality improves by
image		untidy.	cartridge and then recheck.	shaking, replace with a new
(Cartridge life is			OK: Lack of toner, so the life	toner cartridge. Perhaps up to
ended.)		• Parts of the image	is nearly expired.	100 pages left before out of
		are not printed.	2. Some part of image is not	toner.
	Digital Printer
	Digital Printer	• Periodically a "tick	printed - Shake the toner	2. For item 2-
	Digital Printer	tick" noise occurs.	cartridge and then recheck.	If image quality improves after
			(1)NG: clean the LSU window	cleaning the LSU window then
	Digital Printer
			with a cotton swab, then	the toner cartridge is normal.
	Digital Printer
			recheck.	(Contamination on the LSU
			(2)OK: Lack of toner, so the	window has caused image
			life is nearly closed.	quality problems.)
			3. Periodically a noise like "tick	3. For item 3-
			tick" occurs - Measure the	If the time between ticks is
			time between ticks.	about 2 seconds, the toner
				inside the toner cartridge is
			4. White vertical stripes on the	almost exhausted.
			whole or part of the page :	( Purchase and replace with a
			Shake the toner cartridge and	new toner cartridge. Perhaps up
			then recheck. OK: Lack of	to 200 pages left before out of
			toner, so the life is nearly	toner)
			expired
				4. For item 3-
				This is a phenomenon caused
				by lack of toner, so replace the
				toner cartridge.
Toner		• Toner	1. Contamination at regular	1.(a) Refer to section 6.5
Contamination		contamination of	intervals.
		the printed page at	(a)Check the distance	1.(b) If both ends of the OPC drum
		regular intervals	between contamination	are contaminated with toner:
		down the page.	marks.	Check no. of pages printed using
			(b)Check the appearance of	this cartridge – perhaps waste
		• Random Toner	both ends of the toner	toner collector is full.
		contamination over	cartridge OPC drum.
		the whole or large
		parts of the paper	2. Random page contamination.	2. Clean all HV contacts. If the
		surface.	(a) Check that the terminals	problem persists replace the
			(contact points) of the toner	cartridge.
			cartridge and the set are
			clean.
			(b) Check that the terminals
			(contact points) of the toner
			cartridge and the set are not
			damaged.

Samsung Electronics

Service Manual 6-21