Epson EPL-N2000, Service Manual

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5.3.2 Troubleshooting Print Quality Problems
This section describes how to isolate print quality problems from their possible causes and remedy
them, as shown in Table 5-24.
Table 5-24. Print Quality Problems
Symptom Possible Cause Solution
Black/white lines (vertical) Dust, lint in the print head unit
(white lines)
Clean the print head unit
window.
Replace the print head unit.
Dust, lint in the transfer roller
(white lines)
Clean the transfer roller.
Scratches on the PC drum
(black lines)
Replace the Imaging cartridge.
Low main charge voltage
(black lines)
Replace high voltage power
supply and check contacts.
Horizontal lines Dust on the gears Remove the dust. Replace the
drive unit.
Uneven rotation of the polygon
motor Replace the print head unit.
Low image density Low development bias Replace the high-voltage unit
(PWB-F).
Adjust the density by SelecType.
Toner empty Replace the Imaging cartridge.
EPL-N2000 Service Manual Troubleshooting
Rev. A 5-11