Samsung SCX-5315F Series Service Manual page 41

Troubleshooting
Error Status
Different image den-
sity
(left and right)
Horizontal lines or
bands
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Abnormal Image Printing and Defective Roller
If abnormal image prints periodically, check the parts shown below.
NO Roller
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Develope Roller
5 Transfer Roller
6 Heat Roller
7 Pressure Roller
4-20
Check
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. Bad contact on high voltage terminal
2. Contamination of charge roller
3. Contamination of heat roller 4. Malfunction
of LSU
Abnormal image period
94.3 mm
37.7 mm
35.8 mm
44.8 mm
56.6 mm
82.5 mm
78.5 mm
Solution
1. Change OPC cartridge
2. Change toner and / or OPC Drum
3. Check left and right transfer roller springs
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
Kind of abnormal image
White spot. Black spot
White spot. Black spot
Horizontal dark band
Horizontal dark band
Contamination on reverse side of paper / trans-
fer fault
Black spot, White spot
Contamination on reverse side of paper
Samsung Electronics