Light Image - Samsung SCX-4100 Service Manual

7.1.5 Light Image

• Description The printed image is light, with no ghost.
Digital Printer
1. Toner Save mode enabled
Digital Printer
Digital Printer
2. Develop roller is contaminated or the
Digital Printer
Digital Printer
3. Ambient temperature is below than 10°C.
4. Bad contact caused by dirty terminals on
5. 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
2. Charge voltage fault due to bad contact
Digital Printer
Digital Printer
3. VD0 signal of the Main PBA is Low state.
Samsung Electronics
Check and Cause
toner cartridge is almost empty.
the toner cartridge or set.
(Run EDC mode – see sections 6.1.2
and 6.1.3)
Check and Cause
between toner cartridge and set contacts.
Solution
1. Ensure the Toner Save mode is off. Check
set and driver settings.
2. Replace the toner cartridge and try to print
out again.
3. Wait 30 minutes after printer is powered on
before you start printing.
4. Clean the cartridge and set contacts.
Generally clean dirt from inside the set.
5. Replace the HVPS if the problems are not
solved by the above four instructions.
Solution
1. Check the state of the connector which
connects the engine board and HVPS.
2. Clean the high voltage charge terminals.
Note if 1 and 2 do not resolve the problem
and the problem persists replace the
HVPS.
3. Replace the LSU Unit or Main PBA.
Troubleshooting
Service Manual
7-3