Alignment & Troubleshooting
Service Manual
4-36
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 nd 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
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