Samsung ML-1440 Service Manual - Page 46

Light Image, Dark Image or a Black - toner cartridge

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Troubleshooting 4-2-5 Light Image • Description The printed image is light, with no ghost. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause 1. Develop roller is stained when the toner of developer cartridge is almost consumed. Solution 1. Check if the Toner Save mode is off. 2. Ambient temperature is below than 10°C. 2. No 1 : Replace the developer cartridge and try to print out. 3. Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set. 3. No 2 : Wait 30 minutes after printer is powered on before you start printing. 4. Abnormal output from the HVPS. (Run self-test and check 1~4) 4. No3 : Clean up the contaminated area by the toner. 5. Replace the HVPS if the problems are not solved by the above four directions. 4-2-6 Dark Image or a Black • Description The printed image is dark. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause 1. No charge voltage in the engine board. ( Perform DCU diagnostic code 01) 2. Charge voltage is not turned on due to the bad contacts between power supply in the side of the Developer and charge terminal of HVPS. Solution 1. Clean the high voltage charge terminal. 2. Check the state of the connector which connects the engine board and HVPS. 3. Replace the HVPS if not solved by the above direction 1 and 2. 4-8 Samsung Electronics

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Troubleshooting
4-8
Samsung Electronics
4-2-5
Light Image
• Description
The printed image is light, with no ghost.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
Solution
1. Develop roller is stained when the toner
of developer cartridge is almost con-
sumed.
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)
1. Check if the Toner Save mode is off.
2. No 1 : R
eplace the developer 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 directions.
4-2-6
Dark Image or a Black
• Description
The printed image is dark.
Check and Cause
Solution
1. No charge voltage in the engine board.
( Perform DCU diagnostic code 01)
2. Charge voltage is not turned on due to
the bad contacts between power supply
in the side of the Developer and charge
terminal of HVPS.
1. Clean the high voltage charge terminal.
2. Check the state of the connector which
connects the engine board and HVPS.
3. Replace the HVPS if not solved by the
above direction 1 and 2.