Samsung SCX-4200 Series Service Manual page 86

6.1.9 Ghost (1)
• Description Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
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6.1.10 Ghost (2)
Ghost occurs at 75.5mm intervals of the OPC drum in the whole printing.
• Description
(When printing on card stock or transparencies using manual feeder)
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Samsung Electronics
Check and Cause
1. Bad contacts caused by contamination
from toner particles between high voltage
terminal in the main body and the elec-
trode of the Toner cartridge.
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. The life of toner cartridge is expired.
4. Transfer roller life (50,000 sheets) has
expired.
5. Low ambient temperature (below 10°C).
Check and Cause
When printing on card stock, thicker than
normal paper or transparencies, such as
OHP, a higher transfer voltage is required.
Solution
1 and 2. Clean all HV contacts, If problem
persists replace the HVPS.
If problem still persists replace the Main PBA
3. Replace the toner cartridge and try to print
out.
4. Check the transfer roller lifetime and
replace it.
5. Wait about 30 minutes after power on
before using printer.
Solution
Ensure that the correct paper type is selected
in the printer driver or application software.
Remember to set back to normal paper after
use.
Troubleshooting
Service Manual
6-5