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Alignment & Troubleshooting
Service Manual
4-55
Samsung Electronics
4.2.4 Image Quality Problems and solutions
If a mark or other printing defects occur at regular intervals down on the page, they may be caused by
damaged or contaminated rollers. Use the table below to find which roller causes the defect from the periods
of the rollers.
If the roller is dirty, try to clean it. If the problem still remains after cleaning, replace the part including the
defective roller.
NO
Roller
Period (mm)
Yes
No
1
Fuser Belt
125.7
Waving, Offset, Spot, Line Burst
Fuser Unit
2
Pressure roller
91
Offset, Spot, Line Burst
Fuser Unit
3
OPC Drum
75.39
White and Black Spot, Periodic Banding,
Ghost, Color Registration
CMYK toner
cartridge
4
Deve Roller
36.1 (CMY)
White Spot, Horizontal Band
CMY toner cartridge
32.6 (K)
Offset, Spot, Line Burst
K toner cartridge
5
Supply Roller
48.2 (CMY)
Periodic Band (by little difference of density)
CMY toner cartridge
43.4 (K)
K toner cartridge
6
Transfer Roller
44
White and Black Spot, Periodic Banding
PTB Unit
7
PTB Charge roller
31.4
PTB Unit
Содержание CLP-670N
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