Troubleshooting
4-20
Samsung Electronics
Abnormal Image Printing and Defective Roller
If abnormal image prints periodically, check the parts shown below.
Different image den-
sity
(left and right)
1. Uneven pressure between Charge roller
and OPC Drum
2. Uneven pressure between Dev roller and
OPC drum
3. Transfer roller’s pressure force uneven at
each side
1. Change OPC cartridge
2. Change toner and / or OPC Drum
3. Check left and right transfer roller springs
Horizontal lines or
bands
1. Bad contact on high voltage terminal
2. Contamination of charge roller
3. Contamination of heat roller 4. Malfunction
of LSU
1. Clean each contact and check continuity
2. Print several “cleaning sheets” – replace
OPC drum if problem persists.
3. Replace fuser unit
4. Check Main PBA., LSU harness and LSU
NO
Roller
Abnormal image period
Kind of abnormal image
1
OPC Drum
94.3 mm
White spot. Black spot
2
Charge Roller
37.7 mm
White spot. Black spot
3
Supply Roller
35.8 mm
Horizontal dark band
4
Develope Roller
44.8 mm
Horizontal dark band
5
Transfer Roller
56.6 mm
Contamination on reverse side of paper / trans-
fer fault
6
Heat Roller
82.5 mm
Black spot, White spot
7
Pressure Roller
78.5 mm
Contamination on reverse side of paper
Error Status
Check
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
