Epson EPL-5500, Service Manual

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5.4.2 Print Quality Anomalies
This section describes how to isolate possible causes of a print quality problem .
Table 5-28. Print Quality Anomalies
Symptom Possible Cause Part Name Check Item Remedy
Low image density Poor development PWB-F board — Replace the PWB-F
board.
Image transfer
problem Image transfer
unit Check to see if the
surface of image
transfer unit is
damaged. Replace the image
transfer unit.
PWB-F board — Replace the PWB-F
board.
Defective PC drum Photoconduc-
tor unit
— Replace the
photoconductor unit.
Improper print
density setting — — Adjust the print density
using printer settings.
Foggy background Poor development Toner cartridge — Replace the toner
cartridge.
Improper charging Drum charge — Replace the PWB-F
board.
Check the wiring of the
PC drum charging bias
line. Replace the
photoconductor unit.
Improper print
density setting — — Adjust the print density
in printer settings.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-17