Epson EPL-5700 Service Manual page 65

EPL-5700
Table 3-19. Print Quality Problems
Symptom
Back of the paper is dirty. Fusing roller is dirty.
Transfer roller is
dirty.
Paper path is dirty.
Figure 3-5. Dirty spot on
the back.
Low image density. No toner in the toner
cartridge.
End of life of OPC
drum.
Defective developing
Figure 3-6. Low image
bias.
density.
Note* ) Since the life span of the fusing unit and the transfer roller are same,
if you need to exchange either one of them, make sure to exchange both of
them.
Rev. A
Possible Cause Solution
*Exchange the fusing
roller or fusing unit.
(Refer to Note*
below)
*Exchange the
transfer roller.
(Refer to Note*
below)
Clean the paper path.
Exchange the toner
cartridge.
Exchange the drum
cartridge.
Exchange the high
voltage board.
Table 3-20. Print Quality Problems
Symptom
Foggy background. Defective developing
bias.
End of life of OPC
drum
Figure 3-7. Foggy
background.
White line, Black line There is scar or
damage on the OPC
drum.
Abnormal print head.
Figure 3-8. White or
black line.
Offset image Defective fusing roller.
(Abnormal 200M
resistance)
Defective transfer
Figure 3-9. Offset.
roller.
Defective OPC drum,
or end of life.
Chapter3 Troubleshooting
Possible Cause Solution
Exchange the high
voltage board.
Exchange drum
cartridge.
Exchange the OPC
drum.
Exchange the print
head.
Exchange the
fusing roller.*
Exchange the
transfer roller.*
Exchange the drum
cartridge.
3-13