Check and Cause Solution
1. Develop roller is stained when the toner
of print cartridge is almost consumed.
2. Ambient temperature is below than 10°C.
3. Bad contact caused by the toner stains
between the high voltage terminal in the
HVPS and the one in the set.
4. Abnormal output from the HVPS.
(Run self-test and check 1~4)
5. Check warranty out.
1. Check if the Toner Save mode is off.
Check if the density is light.
2. No 1 : R
eplace the print cartridge and try to
print out.
3. No 2 : Wait 30 minutes after printer is pow-
ered on before you start printing.
4. No3 : Clean up the contaminated area by
the toner.
5. Replace the HVPS if the problems are not
solved by the above four instructions.
6. Replace print cartridge.
6.2.6 Dark Image or a Black Page
• Description The printed image is dark.
Check and Cause Solution
1. No charge voltage in the engine board.
2. Charge voltage is not turned on due to
the bad contacts between power supply
in the side of the print cartridge and
charge terminal of HVPS.
3. VD0 signal of the Main PBA is Low state.
4. Case back side the cleaning blade of
print cartridge.
1. Check the state of the connector which
connects the engine board and HVPS.
2. Clean the high voltage charge terminal.
3. Replace the HVPS if not solved by the
above direction 1 and 2.
4. Replace the LSU Unit or Main PBA.
5. Replace print cartridge.
Service Manual
6-3
Samsung Electronics
6-4
Troubleshooting
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