Samsung SCX-4824XBH Service Manual page 84

4) Black/White Spot
Description : 1. Dark or blurry spots occur periodically in the printing
2. White spots occur periodically in the printing
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
the rollers in the Toner cartridge may the rollers in the Toner cartridge may
be contaminated with foreign matter or be contaminated with foreign matte or
at intervals of 75.5 mm, or black spots
voltage is abnormal or the transfer
Service Manual
Alignment & Troubleshooting
1. If dark or blurry 1. If dark or blurry
black spots occur periodically, black spots occur periodically,
paper particles. paper particles.
( Charge roller : 26.7 mm interval ( Charge roller : 37.7 mm interval
OPC drum : 75.5 mm interval) OPC drum : 75.5 mm interval)
2. If faded areas or
voids occur in a black image
occur elsewhere, the OPC drum
surface is damaged.
3. If a black image is
partially broken, the transfer
roller's life has expired.
Run OPC cleaning Mode Print
and run the Self-test 2 or 3 times.
In case of 75.5 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 75.5 mm interval
unremovable in 1, take measures
as to replace the toner cartridge
and try to print out.
3. Clean the inside of the set
against the paper particles and
foreign matter in order not to
cause the trouble.
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