Samsung SCX-483xFD Service Manual page 134

4) Black/White Spot
Description : 1. Dark or blurry spots occur periodically in the printing
2. White spots occur periodically in the printing
the rollers in the toner cartridge may be conta-
minated with foreign matte or paper particles.
of 75.49 mm, or black spots occur elsewhere,
partially broken, the transfer voltage is
Service Manual
SCX-483x/5x3x series
4. Alignment and Troubleshooting
1. If dark or blurry
black spots occur periodically,
(Charge roller : 26.7mm interval
OPC drum : 75.49mm interval)
2. If faded areas or voids
occur in a black image at intervals
the OPC drum surface is
damaged.
3. If a black image is
abnormal or the transfer roller's
life has expired.
Print several OPC cleaning Mode
Prints and then run the Self-test
2 or 3 times.
In case of 75.49 mm interval
unremovable in 1, cleanly remove
foreign substances stuck on the OPC
location equivalent to black spots and
white spots with a dry duster.
1. The transfer roller guarantees
50.000 sheets printing. If the
roller's life is expired, replace it.
2. In case of 26.7 mm interval
unremovable in 1, take measures
as to replace the develop-er
cartridge and try to print out.
5. Clean the inside of the set against
the paper particles and foreign
matter in order not to cause the
trouble.
4-54
Samsung Electronics