Samsung ML-651x series Service Manual page 237

9) Ghost
Description : Ghost occurs at 94.4 mm intervals of the OPC drum in the whole printing.
toner particles between high voltage
voltage terminal in the main body and the
3. The life of imaging unit is expired.
Service Manual
ML-551x / 651x series
4. Alignment and Troubleshooting
1. Bad contacts
caused by contamination from
terminal in the main body and the
electrode of the
imaging unit.
2. Bad contacts
caused by contamination
from toner particles between high
one in the HVPS board.
4. Transfer roller lifetime
(100K sheets) has expired.
5. Abnormal low temperature
(below 10 ).
Clean the terminals when
contaminated by toner particles.
Occur in the imaging unit,
replace the imaging unit and try to
print out.
Replace the engine board if not
solved by the above directions 1-2.
If not solved by the direction 3,
check the transfer roller lifetime
and replace it.
Wait about 1 hour after power on
before using printer.
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Samsung Electronics