Service manual

EPSON EPL-5800 Revision B
Troubleshooting Troubleshooting 63
3.1.3 Troubleshooting for Print Quality Problems
When the print quality problems occur, replace the toner cartridge and the drum cartridge
first, and determine either it is caused by each cartridge or caused by the printer.
When it is a print quality problem, measure the generating pitch for abnormal images, and
specify the abnormal part with the table below.
Figure 3-1. Print Image
Table 3-10. Print Quality Problems 1
Pitch Possible Abnormal Part (Diameter) Replacement Unit
28mm Sleeve Roller (
φ
15.7mm) Toner Cartridge
94.2mm OPC Drum
(φ
30mm) Drum Cartridge
50.3mm Transfer Roller
(φ
16mm) Transfer Roller
62.8mm Heat Roller
(φ
20mm)
Fusing Unit
67.8mm Backup Roller
(φ
21.6mm)
Pitch (mm)
Abnormal
Image
Table 3-11. Print Quality Problems 2
Symptom Possible Cause Solution
All White No toner cartridge. Install the toner cartridge.
No toner in the toner
cartridge.
Replace the toner cartridge.
No drum cartridge. Install the drum cartridge
Defective OPC drum. Replace the OPC drum.
Abnormal laser emission. Replace the print head.
Replace the high voltage unit (HV1).
Replace the main control board.
Improper transfer. Replace the transfer roller.
Replace the high voltage unit (HV1).
Replace the main control board.
All Black Abnormal laser emission. Replace the print head.
Replace the main control board.
Abnormal charging. Replace the high voltage unit (HV1).
Replace the main control board.
White Out
Paper is wet. Replace paper.
Improper transfer. Replace the transfer roller.
Replace the high voltage unit (HV1).
Replace the main control board.
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