Samsung ML-1650 Cause and solution of Bad image, Vertical Black Line and Band, Description

Page 30

Troubleshooting

4-2 The cause and solution of Bad image

4-2-1 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.

4-2-2 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.

4-6	Samsung Electronics

Image 30

Contents Laser Printer Version no This manual is stated and provided for service description Safety Precautions Read each caution carefullyPrecautions on Disassembly and Reassembly Releasing Plastic LatchesTools for Troubleshooting Electronic ScalePaper ML-1650 ML-1651N EngineController TonerML-1650 ML-1651N Environment NetworkGeneral Precautions on Disassembly Releasing Plastic LatchesWhenever servicing the machine, you must perform as follows Transfer Roller Controller Board Pickup Assembly Main Cover Exit Assembly MP Multi-Purpose TrayLSU Hvps board10 Fan SolenoidDrive Assembly To remove the thermostat from the fuser assembly Fuser AssemblyTo remove the thermistor from the fuser assembly To remove the halogen lamp from the fuser assemblyGuide Feed & Erase Lamp MPF Assembly and Miscellaneous on MPF Assembly To replace the nockup plateTo replace the pickup roller To replace the pickup holder and the Adjust End MP To replace the Paper Empty PE sensorEngine Board and Miscellaneous To replace the exit board To replace the actuator feed To remove the transfer guideCause and solution of the bad discharge How to use DCUCause and solution of Bad image Cause and solution of the malfunctionHow to use DCU DCU SetupCode Self Diagnostic Mode Self Test Button Paper Path LayoutML-1650 Diagnostic Control Unit Quick Referance DCU PanelVertical Black Line and Band Cause and solution of Bad imageCheck and Cause Solution Vertical White LineHorizontal Black Band Black/White SpotLight Image Dark Image or a BlackUneven Density BackgroundGhost Satins on the Face Satins on Back Blank Page Print outCause and solution of the bad discharge Wrong Print Position2 JAM 3 JAM 4 JAMMulti-Feeding Paper rolled in the fuser7 OPC Cause and solution of the malfunction All LEDs blinking Fuser ErrorAll LEDs blinking Scan Error Not function of the gear of the fuser due to melting away Paper EmptyPaper Empty without indication No lamp on when the cover is open Cover OpenNo Power Defective motor operationVertical Line Getting Curved Toner Cartridge Service Partially blank Fault Signs Cause & Check Solution Light imageSigns and Measures at Poor toner cartridge ImageFault Signs Cause & Check Solution White Black spot Recycled productFault Signs Cause & Check Solution Ghost & Image Cause and solutions of bad environment of the software Printer is not workingUtilities program Abnormal Printing Spool Error How to delete the data in the spool managerExploded Views and Parts List Exploded Views and Parts List Service Parts List10-3 10-4 All Exploded Views and Parts List Cover Exploded ViewFrame Exploded View Exit Exploded View Rack-MPF Exploded View Fuser Exploded View Drive Exploded View Pick-Up Exploded View Cassette Exploded View Block Diagram Video ControllerBlock DiagramEngine Block Diagram SensorConnection Diagram VPS

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