Troubleshooting Print Quality Problems - Epson EPL-5700 Service Manual

EPL-5700

3.4.3 Troubleshooting Print Quality Problems

When the print quality problems occur, exchange the toner cartridge and
drum cartridge first, then, find out that its cause comes from each cartridge
or from the printer.
Table 3-17. Print Quality Problems
Symptom Possible cause
All white. No toner cartridge.
No toner in the toner
cartridge.
No drum cartridge.
Defective OPC drum
Figure 3-2. All
white. No
printing.
Abnormal laser
emission.
Improper transfer.
Rev. A
Solution
Install the toner cartridge.
Exchange the toner
cartridge.
Install the drum cartridge.
Exchange OPC drum.
Exchange the print
head.
Exchange the main
control board.
Exchange the transfer
roller.*
Exchange the high
voltage board.
Exchange the main
control board.
Table 3-18. Print Quality Problems
Symptom Possible cause
All black. Abnormal laser
emission.
Abnormal charging.
Figure 3-3. All
black.
All white. The paper is wet.
Improper transfer.
Figure 3-4. All
white. No
printing.
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.
Chapter3 Troubleshooting
Solution
Exchange the Print
head.
Exchange the main
control board.
Exchange the high
voltage board.
Exchange the main
control board.
Exchange the paper.
Exchange the transfer
roller.*
Exchange the high
voltage board.
Exchange the main
control board.
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