Samsung SF 560, SF565P Troubleshootin

Troubleshooting

77. Troubleshooting

7.1 Printing Problems – Causes and Solutions

7.1.1 Vertical Black Lines and Bands

• Description

Digital Printer

1.Straight thin black vertical lines occur in the printing.

2.Dark black vertical bands occur in the printing.

	Check and Cause		Solution

1.	Damaged developer roller, deformed	1.	Replace the toner cartridge and test
	Doctor-blade or cleaning-blade in the		again.
	Toner cartridge.
2.	Scratched surface of the charge roller in	2.	Replace the toner cartridge and test
	the toner cartridge.		again.
3.	3. Depression or deformation of the	3.	Replace the transfer roller and test again.
	surface of the transfer roller.

7.1.2 Vertical White Line

• Description

Digital Printer

White vertical voids in the image.

	Check and Cause		Solution

1.	1. Contamination of the window or	1.	Clean the LSU window with recommended
	internal lenses of LSU mirror.		cleaner (IPA) Clean the window with a
			clean cotton swab. If dirt is inside the LSU
			– replace LSU.
2.	Foreign object inside the toner cartridge	2.	Replace the toner cartridge.
	or low toner.
3.	Foreign object, contamination or burr on	3.	Clean the exposure window.
	the edge of the toner cartridge window.
4.	If the fuser is defective, voids occur	4.	Open the front cover and check the ribs
	periodically at the top of a black image.		that correspond to the position of the
			voids. Remove if found.
5.	Contamination of the OPC drum.	5.	If the problems are not solved, replace
			the toner cartridge.
6.	Depression or deformation of the surface	6.	Replace the transfer roller.
	of the transfer roller

Service Manual

Samsung Electronics

Troubleshooting

7.1.3 Horizontal Black Bands

• Description

Digital Printer

1. Dark or blurry horizontal stripes occur in the printing periodically. (These may occur at regular intervals down the page.)

Check and Cause				Solution

1. Bad contacts on the toner cartridge high			1.	Clean all HV terminals on the cartridge and
voltage terminals.				on the set frame. Ensure all toner or paper
				dust particles are removed.
2. The rollers in the toner cartridge may be			2.	Clean the right Gear that has relatively
contaminated.				small tooth gap on the OPC.
Charge roller	=	37.7 mm
Supply roller	=	37 mm
Develop roller =		35.3 mm
Transfer roller	=	45.3 mm
			3.	If the problem persists replace the toner
				cartridge.

7.1.4 Black/White Spot

• Description

Digital Printer

1.Dark or blurry black spots occur periodically in the printing.

2.White spots occur periodically in the printing.

Check and Cause	Solution

1. If dark or blurry black spots occur periodi-	1. Print several OPC cleaning Mode Prints
cally, the rollers in the Developer may be	and then run the Self-test 2 or 3 times.
contaminated with foreign matte or paper
particles.
( Charge roller : 37.7 mm interval
OPC drum : 75.5 mm interval)
2. If faded areas or voids occur in a black	2. 75.5 mm repetition: Examine the surface of
image at intervals of 75.5 mm, or black	the OPC drum and carefully clean with a
spots occur elsewhere, the OPC drum	soft, lint free cloth. If unsuccessful replace
surface is damaged.	the cartridge.
	37.7mm repetition: Replace the toner car-
	tridge
3. If a black image is partially broken, the	3. The transfer roller guarantees 60,000
transfer voltage is abnormal or the	sheets printing. If the roller's life is expired,
transfer roller's life has expired.	replace it.
	Note. Cleaning the inside of the set to
	remove excess toner particles or paper
	dust will reduce the occurrence of this
	problem..

Service Manual

Samsung Electronics

Troubleshooting

7.1.5 Light Image

• Description

Digital Printer

The printed image is light, with no ghost.

	Check and Cause		Solution

1. Toner Save mode enabled		1. Ensure the Toner Save mode is off. Check
			set and driver settings.
2.	Develop roller is contaminated or the	2.	Replace the toner cartridge and try to print
	toner cartridge is almost empty.		out again.
3. Ambient temperature is below than 10°C.		3.	Wait 30 minutes after printer is powered on
			before you start printing.
4.	Bad contact caused by dirty terminals on	4.	Clean the cartridge and set contacts.
	the toner cartridge or set.		Generally clean dirt from inside the set.
5.	Abnormal output from the HVPS.	5. Replace the HVPS if the problems are not
	(Run EDC mode – see sections 6.1.2		solved by the above four instructions.
	and 6.1.3)

7.1.6 Dark Image or a Black

• Description

Digital Printer

The printed image is dark.

	Check and Cause		Solution
1.	No charge voltage in the engine board.	1.	Check the state of the connector which
			connects the engine board and HVPS.
2.	Charge voltage fault due to bad contact	2.	Clean the high voltage charge terminals.
	between toner cartridge and set contacts.	Note if 1 and 2 do not resolve the problem
			and the problem persists replace the
			HVPS.

3. VD0 signal of the Main PBA is Low state.

3. Replace the LSU Unit or Main PBA.

Service Manual

Samsung Electronics

Troubleshooting

7.1.7 Uneven Density

• Description Print density is uneven between left and right.

	Check and Cause	Solution
	Check and Cause	Solution
1.	The pressure force on the left and right	1. Replace both the left and right bush and
	springs of the transfer roller is not even,	spring assemblies.
	springs of the transfer roller is not even,	spring assemblies.
	the springs are damaged, the transfer


	roller is improperly installed, or the trans-
	roller is improperly installed, or the trans-
	fer roller bushing or holders are damaged.
	fer roller bushing or holders are damaged.
2.	The life of the Toner cartridge has	2. Replace the toner cartridge and try to print out



	expired.
3.	The toner level is not even on the toner	3. Gently shake the toner cartridge and try
	cartridge roller due to the damaged blade	printing again. If the problem persists
	or low toner.	replace the toner cartridge.

7.1.8 Background

• Description

Digital Printer

Light dark background appears in whole area of the printing.

	Check and Cause	Solution

1.	Printing large quantities of low coverage	1. The toner cartridge is basically designed to
	(2%) pages or the printer has not been	print 3,000 sheets with 5% image. If it
	used for a long time.	prints more than 3,600 sheets with 2%
		coverage, a background can occur.
2.	Is a recycled toner cartridge be	2. The A/S is not guaranteed if using a recy-
	used?	cled toner cartridge.
		Note try shaking the toner cartridge gently
		from side to side. If the problem persists
		replace the toner cartridge.
3.	Has the life span of the toner	3. Replace the toner cartridge when its life is
	cartridge ended?	expired.
4.	Is the movement(Up and Down) of	4. Clean the transfer roller bushes.
	the transfer roller smooth?
5. Is the HVPS normal?		5. Clean the high voltage charge terminals.
		If this does not resolve the problem replace
		the HVPS.

Service Manual

Samsung Electronics

Troubleshooting

7.1.9 Ghost (1)

• Description Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.

Digital Printer

mm 5.75

Check and Cause	Solution
1. Bad contacts caused by contamination	1 and 2. Clean all HV contacts, If problem
from toner particles between high voltage	persists replace the HVPS.
terminal in the main body and the elec-
trode of the Toner cartridge.	If problem still persists replace the Main PBA

2.Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board.

		3.	Replace the toner cartridge and try to print
3.	The life of toner cartridge is expired.		out.
		4.	Check the transfer roller lifetime and
4.	Transfer roller life (60,000 sheets) has		replace it.
	expired.
		5.	Wait about 30 minutes after power on
5.	Low ambient temperature (below 10°C).		before using printer.
		6.	Replace the toner cartridge and try to print
6.	Damaged cleaning blade in the toner		out again
	cartridge.

7.1.10 Ghost (2)

• Description

Ghost occurs at 75 mm intervals of the OPC drum in the whole printing. (When printing on card stock or transparencies using manual feeder)

Digital Printer

mm 75

Check and Cause	Solution

When printing on card stock, thicker than	Ensure that the correct paper type is selected
normal paper or transparencies, such as	in the printer driver or application software.
OHP, a higher transfer voltage is required.	Remember to set back to normal paper after
	use.

Service Manual

Samsung Electronics

Troubleshooting

7.1.11 Ghost (3)

• Description

Digital Printer

Ghost occurs at 66.3 or 75.5 mm intervals.

	Check and Cause	Solution

32	Fuser contamination.	1. Disassemble the fuser and remove any
32		contamination on the rollers. Clean any
mm		contamination on the rollers. Clean any
mm		contamination from between the
		contamination from between the
		Thermistor and the Heat roller. (Caution:
		Take care not to deform the rollers.)

7.3.12 Ghost (4)

• Description

Digital Printer

A White ghost occurs in a black image printing at 32 mm intervals.

	Check and Cause		Solution

32	1. The life of the developer may be expired.	1.	Problem in the toner cartridge, replace the
32			toner cartridge and try to print out again.
mm			toner cartridge and try to print out again.
mm
	2. Abnormal output from the HVPS.	2.	Check the HVPS supply voltage. Clean all
	(Run EDC mode – see sections 6.1.2		HV terminals on the cartridge and on the
	and 6.1.3)		set. Replace the HVPS if the problem
			persists.

7.1.13 Stains on the Face of the Page

• Description

Digital Printer

The background on the face of the printed page is stained.

Check and Cause		Solution

1. Toner leakage due to improperly sealed	1.	Replace the toner cartridge.
toner cartridge.
2. If the transfer roller is contaminated,	2.	If the transfer roller is contaminated, run
stains on the face of page will occur.		PC Cleaning Mode Print 2 or 3 times and
		then perform Self-Test 2 or 3 times to
		remove contamination.

Service Manual

Samsung Electronics

Troubleshooting

7.1.14 Stains on Back of Page

• Description

Digital

Digital Printer

The back of the page is stained at 45.3 or 75.5 mm intervals.

Check and Cause	Solution

1. 45.3mm : Transfer roller is contaminated.	1. Perform the OPC Cleaning Mode Print 2 or
	3 times. Run Self-Test to remove the
	contamination from the transfer roller.
	Note. Replace the transfer roller if
	contaminated severely.
2. 75.5mm : Pressure roller is contaminated.	2. Disassemble the fuser and clean the
	H/R(Heat Roller) and P/R(Pressure roller).
	Check and clean the area between the
	H/R and the Thermistor. (Caution: Take
	care not to deform the rollers.)

7.1.15 Blank Page Print out (1)

• Description	Blank page is printed.

		Check and Cause	Solution
		Check and Cause	Solution

		Bad ground contacts in OPC and/or toner	1. Check if the Ground-OPC or the OPC
		cartridge.	Ground Zener diode are defective or open
			circuit. (set inside left side).
			2. Remove contamination of the terminals on
			the toner cartridge and the unit.

7.1.16 Blank Page Print out (2)

1. Blank page is printed.

• Description 2. One or several blank pages are printed.

3. When the printer turns on, several blank pages print.

Check and Cause

Solution

1. Abnormal solenoid.

1. Perform the engine self test using TECH

Mode to check if the Solenoid is normal.

If the problem persists replace the main

PBA

Service Manual

Samsung Electronics

Troubleshooting

7.2 Fax & Phone Problems

7.2.1 No Dial Tone

• Description There is no dial tone when the On-Hook dial button is pressed.

Check and Cause	Solution

1. Check that the telephone line cord supplied with	1. If the telephone cord is OK but there is no dial tone, try
the set is connected to TEL LINE correctly.	plugging a normal telephone into the wall socket. I this
	is OK then replace the LIU B'd.
2. Listen for a CLICK sound when the OHD key is	2. If you cannot hear the OHD CLICK sound, the OPE
pressed.	Ass'y may be defective. Replace the OPE Ass'y.
3. Check the connection of the HARNESS between	3. Check the Speaker connection and the harness
the LIU and the Main B'd.	between the LIU and the Main PBA, replace as
	necessary.
4. Check that the SPEAKER is connected correctly.	4. Use Tech mode / Modem Test to check that the
	speaker and amplifier are working. Replace the Main B'd.

7.2.2 Defective MF DIAL

• Description	The MF DIAL is not functioning.

	Check and Cause	Solution

1. Check that the telephone line cord supplied with		1. If the telephone cord is OK but there is no dial tone, try
the set is connected to TEL LINE correctly.		plugging a normal telephone into the wall socket. I this
		is OK then replace the LIU B'd.
2. Listen for a CLICK sound when the keKEY is		2. If you cannot hear the OHD CLICK sound, the OPE
pressed.		Ass'y may be defective. Replace the OPE Ass'y.
3. Check the connection of the HARNESS between		3. Check the Speaker connection and the harness
the LIU and the Main B'd.		between the LIU and the Main PBA, replace as
		necessary.
4. Check that the SPEAKER is connected correctly.
		4. Use Tech mode / Modem Test to check that the
		speaker and amplifier are working. Replace the LIU
		and Main B'd in sequence
		Notes: Product supports MF DIAL type only.

Service Manual

Samsung Electronics

Troubleshooting

7.2.3 Defective FAX FORWARD/RECEIVE

• Description FAX FORWARD/RECEIVE is not functioning.

Check and Cause	Solution

1. Check that you can hear a dial tone by pressing	1. If MODEM testing is normal and there is no dial tone,
OHD.	then try replacing the LIU B'd.
2. Check that you can hear a RECEIVE tone when	2. If testing the MODEM shows a fault replace the
MODEM testing in TECH Mode.	Main B'd.

7.2.4 Defective FAX FORWARD

• Description RECEIVE is functioning, but FORWARD is not functioning or received data is corrupt.

	Check and Cause		Solution

1.	Check if there is a NOISE line by pressing on-hook	1.	If you can hear a noisy line when using on-hook dial,
	dial and listening.	replace or repair the telephone line
2.	Check that the destination fax machine can receive	2.	Replace LIU.
	forwarded faxes by using a different sending fax
	machine (preferably from the same wall socket).
3.	Check the cable between the set and the wall	3.	Replace the line cord.
	socket for damage.

Service Manual

Samsung Electronics

Troubleshooting

7.2.5 Defective FAX RECEIVE (1)

• Description FORWARD is functioning, but RECEIVE is not functioning or the received data is corrupt.

	Check and Cause	Solution

1.	Check if there is a NOISE line by pressing on-hook	1. If you can hear a noisy line when using on-hook dial,
	dial and listening	replace or repair the telephone line.
2.	Use a different fax machine to receive from the	2. Replace the LIU.
	same sender (if possible on the same wall socket).

7.2.6 Defective FAX RECEIVE (2)

• Description Received data are lengthened or cut in the printing.

Check and Cause	Solution

1. Check if there is a NOISE line by pressing on-hook	1. If you can hear a noisy line when using on-hook dial,
dial and listening	replace or repair the telephone line
2. Ask sender to send to another fax machine	2. Replace LIU or main PBA in sequence.
(if possible connected to the same wall socket)

7.2.7 Defective FAX RECEIVE (3)

• Description The phone is ringing continuously, but it set does not answer the call.

Check and Cause	Solution

Check that the RECEIVE Mode is set to FAX MODE.	If the fault persists even when the RECEIVE Mode is
	changed to FAX MODE then replace the LIU and the
	Main B'd in sequence.

Service Manual

Samsung Electronics

+ 22 hidden pages