Dell 1815DN service manual Fault Signs Cause & Check Solution Ghost & Image

Troubleshooting

Fault	Signs	Cause & Check	Solution
Ghost & Image	• The printed image	1. The printed image is too light	1. All of 1, 2, 3 above
Contamination	is too light or dark,	or dark, or partially contami-	(1)Remove toner and foreign sub-
	or partially contami-	nated black.	stances adhered to the contact
	nated black.	(1)Check whether foreign sub-	point of the developer.
		stance or toner are stuck to	(2)The contact point of the unit
	• Totally contaminat-	the terminal(point of contact)	facing that of the developer
	ed black.	of the developer.	also must be cleaned.
	(Black image print-	(2)Check whether the terminal	(3)If the terminal assembly is
	ed out)	assembly is normal.	unsafe:
			• Fully stick the terminal to or
	• The density of print-		reassemble it after disassem	-
	outs is too dark and		bling.
	ghost occurs.		• Disassemble the side plate and
			push the terminal to be stuck,
			then reassemble it.
		2. Totally contaminated black.	2. In case of 2
		(Black image printed out)	It is a phenomenon when the
		(1)Check whether foreign sub-	OPC drum of the developer is not
		stances are stuck to the ter-	electrically charged. Clean the
		minal(point of contact) of the	terminals of the charged roller	,
		developer and the state of	then recheck it.
		assembly.
		(Especially check the
		charged roller terminal.)
		3. The printed image is dark and	3. In case of 3
		ghost occurs.	It is a phenomenon as the devel-
		(1)Check foreign substance	oping bias voltage of the devel	-
		attached to the terminal	oper. Clean the terminals of the
		(point of contact) of the	developing roller, then recheck it.
		developer and the state of
		assembly.
		(Especially check the devel-
		oping roller terminal.)

Service Manual 7-27