Print Quality Anomaly; Table 5-29. Print Quality Anomaly - Epson EPL-N1200 Service Manual

Troubleshooting

5.3.2 Print Quality Anomaly

This section describes how to isolate a print quality problem from the possible causes.
Symptom Possible Cause
Low image density
Poor
development
Improper
charging
Image transfer
problem
Paper problem
Defective optical
unit
Improper print
density setting
Foggy background
Poor
development
ABCDE
ABCDE
Improper
ABCDE
charging
ABCDE
Improper print
density setting in
SelecType level 2
Defective optical
unit
5-10

Table 5-29. Print Quality Anomaly

Part Name
Imaging
cartridge
High-voltage
supply (HV1)
board
Imaging
cartridge
HV1 board
Image transfer
roller
HV1 board
Paper
Optical unit
—
Imaging
cartridge
Drum charge
—
Optical unit
EPL-N1200 Service Manual
Check Item
Check the toner level
in the imaging
cartridge.
—
—
—
Check to see if the
surface of image
transfer roller is
damaged.
—
Check to see if paper
is moist.
—
—
—
Check the wiring of
developing bias line.
—
Check the wiring of
PC drum charging
bias line.
—
—
Remedy
Shake the imaging
cartridge.
Replace the imaging
cartridge.
Replace the HV1
board.
Replace the imaging
cartridge.
Replace the HV1
board.
Replace the image
transfer roller.
Replace the HV1
board.
Replace paper.
Replace the optical
unit.
Adjust the print
density using
SelecType.
Replace the imaging
cartridge.
Replace the HV1
board.
Replace the HV1
board.
Replace the imaging
cartridge.
Adjust the print
density in SelecType.
Replace the optical
unit.
Rev. A