Samsung ML-1755 Service Manual page 60

7.1.5 Light Image
• Description The printed image is light, with no ghost.
Digital Printer
1. Develop roller is stained when the toner
Digital Printer
Digital Printer
Digital Printer
Digital Printer
2. Ambient temperature is below than 10°C.
3. Bad contact caused by the toner stains
4. Abnormal output from the HVPS.
7.1.6 Dark Image or a Black
• Description The printed image is dark.
Digital Printer
1. No charge voltage in the engine board.
Digital Printer
Digital Printer
Digital Printer
2. Charge voltage is not turned on due to
Digital Printer
Samsung Electronics
Check and Cause
of developer cartridge is almost con-
sumed.
between the high voltage terminal in the
HVPS and the one in the set.
Check and Cause
( Perform DCU diagnostic code 01)
the bad contacts between power supply
in the side of the Developer and charge
terminal of HVPS.
T RO U B L E S H O OT I N G
Solution
1. Check if the Toner Save mode is off.
2. Replace the developer cartridge and try to
print out.
3. Wait 30 minutes after printer is powered on
before you start printing.
4. Clean up the contaminated area by the
toner.
5. Replace the HVPS if the problems are not
solved by the above four directions.
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.
Training Manual
7-3