Horizontal Black Band - Samsung ML-3561N Service Manual

Troubleshooting

7.1.3 Horizontal Black Band

1. Dark or blurry horizontal stripes occur in the printing periodically.
• Description
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
7.1.4 Black/White Spot
1. Dark or blurry black spots occur periodically in the printing.
• Description
2. White spots occur periodically in the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Service Manual
7-2
Check and Cause
1. Bad contacts of the voltage terminals to
print cartridge.
2. The rollers of print cartridge may be
stained.
Charge roller = 38mm
Supply roller = 45mm
Develop roller = 43mm
Transfer roller = 55mm
Check and Cause
1. If dark or blurry black spots occur periodi-
cally, the rollers in the print cartridge may
be contaminated with foreign matte or
paper particles.
( Charge roller : 38 mm interval
OPC drum : 95 mm interval)
2. If faded areas or voids occur in a black
image at intervals of 95 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 trans-
fer roller's life has expired.
Solution
1. Clean each voltage terminal of the Charge,
Supply, Develop and Transfer roller.
(remove the toner particles and paper par-
ticles)
2. Clean the right Gear that has relatively
small gap of the teeth in the OPC.
3. If the malfunction persists, replace the
print cartridge.
Solution
1. Run OPC cleaning Mode Print and run the
Self-test 2 or 3 times.
2. In case of 95 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.
3. The transfer roller guarantees 150,000
sheets printing in normal environment. If
the roller's life is expired, replace it.
4. In case of 95 mm interval unremovable in
1, take measures as to replace the print
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.
Samsung Electronics