Samsung Msys 6800 Service Manual page 37

Error Status
Stains on back of
paper
Poor Fusing
Partial blank image
(not periodic)
Partial blank image
(periodic)
Different image density
(left and right)
Horizonral band
Samsung Electronics
Check
1. Contamination of transfer roller
2. Stains of paper path
3. Pressure roller's contamination
1. Use recommended paper?
2. Check fusing temperature
3. The machine was under the low
temperature for a long time?
1. Toner is low?
2. The toner cartridge is out of
position?
1. Develope roller scar or particle
2. Scar or particle (94 mm)
3. Transfer roller scar or particle
(47 mm)
1. Charge roller's pressure force
unbalance
2. Dev. roller and OPC or Dev. roller
and blade's pressure force
unbalance
3. Transfer roller's pressure force
unbalance of each side
1. Unstable high voltage contact
2. Charge roller's contamination
3. Contamination of heat roller
4. Malfunction of LSU
Maintenance & Troubleshooting
Solution
1. Clean the transfer roller with vaccum
cleaner
2. Clean the area of paper path with cloth
or air cleaner.
3. Remove fuser and replace it
1. Should use recommended paper
2. Check engine board.
If you have not thermometer, measure
the thermistor voltage to CPU, If
2.98V±5% in printing CPU works well.
Then, disassemble fuser and check the
thermistor contact and thermistor.
3. Re-check after putting the machine in the
warm place for certain period.
1. Replace Toner cartridge
2. Checkand adjust
1~2. Replace toner cartridge
3. Replace transfer roller
1~2. Change toner cartridge
3. Check left and right spring of transfer
roller and the spring pressing the
developer inside the machine
1. Clean each contact and check good
contact
2. Clean charge roller
3. Replace fuser unit
4. Check engine B'd
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