Samsung SCX 3205 Service Manual page 107

4) Black and White Spot
Description : 1. Dark or blurry black spots occur periodically in the printing.
2. White spots occur periodically in the printing.
spots occur periodically, the rollers
in the Developer may be contaminated with
foreign material or paper particles.
(Charge roller : 26.7 mm interval
OPC Drum : 62.5 mm interval)
occur in a black image at intervals of
62.5 mm, or black spots occur elsewhere,
the OPC drum surface is damaged.
3. If a black image is partially
broken, the transfer voltage is abnormal or
the transfer roller's life has expired.
Service Manual
Alignment and Troubleshooting
1. If dark or blurry black
2. If faded areas or voids
Clean each voltage terminal of the
Charge. Supply, Develop and
Transfer roller. (remove the toner
particles and paper particles)
In case of 62.5 mm interval
unremovable in 1, Clean remove
foreign substances stuck on the OPC
location equivalent to black spots and
white spots with a dry duster.
The transfer roller has expired
[30.000 sheets]. Replace it.
If the roller's life is expired, replace it.
In case of 26.7 mm interval
unremovable in 1, take measures as
to replace the developer cartridge
and try to print out.
Clean the inside of the set against the
paper particles and foreign matter in
order not to cause the trouble.
4-47
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Samsung Electronics