Samsung ML-1700 Troubleshooting, Bad image, Digital Printer Digital Printer, Description

T RO U B L E S H O OT I N G

77. Troubleshooting

7.1 Bad image

7.1.1 Vertical Black Line and Band

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Straight thin black vertical line occurs in the printing.

2.Dark black vertical band occur in the printing.

	Check and Cause		Solution
1.	Damaged develop roller in the Developer.	1.	If causes 1 and 2 occur in the developer
	Deformed Doctor-blade or cleaning-		cartridge, replace the developer and try to
	blade.		print out.
2.	Scratched surface of the discharge roller	2.	Replace the transfer roller if occurred as
	in the developer.		No. 3.

3.Partly depression or deformation on the surface of the transfer roller.

7.1.2 Vertical White Line

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

White vertical voids in the image.

	Check and Cause		Solution
1.	Foreign matter stuck onto the window of	1.	Foreign matter stuck onto the window :
	internal lenses of LSU mirror.		Clean the LSU window with recommend-
			ed cleaner(IPA) Clean the window with a
			clean cotton swab.
2.	Foreign matter or toner particles between	2.	Foreign matter in the LSU : Open the
	the developer roller and blade.		cover of LSU and clean with a cotton
	(In case the life of the developer has		swab on the surface of the reflex mirror.
	been expired, white lines or light image
	occur in front of the image.)
3.	It may occur when Burr and foreign sub-	3.	No 3. : Remove the foreign matter and
	stances are on the window of the devel-		burr of the exposure window.
	oper frame.		(Developer cartridge)
4.	If the fuser is defective, voids occur peri-	4.	No. 4. : Open the front cover and check
	odically at the top of a black image.		ribs that corresponds to the position of
			the voids. Remove if found.
		5.	If the problems are not solved, replace
			the developer cartridge.

Service Manual

Samsung Electronics

7-1