Samsung SCX-4200 manual Fault Signs Cause & Check Solution

Troubleshooting

	Fault	Signs	Cause & Check	Solution
White Black spot		• Light or dark black	1. If light or dark black dots	1. For item 1 -
		dots on the image	occur at regular intervals this	Run OPC Cleaning Mode Print
	Digital Printer	occur periodically.	is because the toner cartridge	4-5 times repeatedly to remove
			rollers are contaminated with	excess toner. Especially check
	Digital Printer
		• White spots occur	foreign substance or paper	for foreign substances on the
	Digital Printer	in the image	particles.	OPC surface Clean with a clean
	Digital Printer	periodically.	(1)37.8mm interval : Charge	gauze moistened with IPA
	Digital Printer		roller	Isopropyl Alcohol) take care not
			(2)75.5mm interval : OPC	to damage the OPC surface.
			cycle	Never use other forms of alcohol.
			2. If white spots occur in a black
			image at intervals of 75.5mm,	2. For Item 2 -
			or black spots occur	If running OPC Cleaning Mode
			elsewhere, the OPC drum is	Print 4-5 times does not resolve
			damaged or foreign	the problem
			substance is stuck to the	: at intervals of 37.8mm - place
			surface.	the toner cartridge.
			3. If a black and white or	: at intervals of 75.5mm – clean
				OPC drum.
			graphic image is partially
			broken at irregular intervals,	3. For item 3 - Change the transfer
			the transfer roller's life has	roller because the life of the
			been expired or the transfer	transfer roller has expired.
			voltage is abnormal.	(Check the transfer voltage and
				readjust if necessary.)

Recycled product • Poor appearance of	1. Poor appearance of the toner	1. For Item 1 the cartridge is judged
the toner cartridge.	cartridge.	to be a recycled product -
	(a)Check for damage to label	(a) If there is any evidence of
• Dirty or rough	and if different materials are	disassembling the toner cartridge.
printouts.	used.	(b) If materials other than normal
	(b)Check the appearance of	parts of the toner cartridge are
• Bad background in	parts of the toner cartridge,	added or substituted.
the image.	such as frame, hopper, screws
		2. Clean all HV contacts. If the
		problem persists replace the
	2. Unclean and rough printouts.	cartridge.
	(a)Check that the terminals
	(contact point) of the toner	Note If the cartridge is judged to be
	cartridge and the set are clean.	recycled then these types of
	(b)Check that the terminals	problems can occur when the
	(contact point) of the toner	toner cartridge is recycled over
	cartridge and the set are not	2 times.
	damaged.
		If ‘nearly empty’ cartridges are
		collected for re-use this is
		judged as recycling the toner
		cartridge.

6-22Service Manual

Samsung Electronics