Service Manual
Troubleshooting
7-2
Samsung Electronics
7.1.3 Horizontal Black Band
• Description
1. Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
Solution
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
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.
7.1.4 Black/White Spot
• Description
1. Dark or blurry black spots occur periodically in the printing.
2. White spots occur periodically in the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
Solution
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.
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.
Содержание ML-3561N Series
Страница 7: ...Samsung Electronics Service Manual Precautions 1 6 ...
Страница 19: ...Service Manual Summary of Product 4 2 Samsung Electronics 4 1 2 Rear View ...
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Страница 71: ...Service Manual Disassembly and Reassembly 5 32 Samsung Electronics ...
Страница 133: ...Exploded Views Parts List Service Manual 8 9 Samsung Electronics 8 7 Deve Motor Assembly 0 1 2 3 4 5 6 7 7 ...
Страница 152: ...Service Manual Block diagram 9 2 Samsung Electronics 9 2 System Timing Chart ...
Страница 153: ...Connection Diagram Service Manual 10 1 Samsung Electronics 10 10 10 Connection Diagram ...
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Страница 155: ...Connection Diagram Service Manual 10 3 Samsung Electronics ...