Unit Level Troubleshooting - Epson STYLUS 4001968 Service Manual

STYLUS 800 Service Manual

5.2 UNIT LEVEL TROUBLESHOOTING

When a problem occurs, you can distinguish the defective unit by referring the symptoms of the
defect. The table below lists the svrrmtom of certain defects, and you can easily identify what the
problem. Once the problem is identif&i, refer to the flowchart corresponding to each problem.
Symptom
Printer does not operate at
power on
Error is detected
Failure occurs during printing
Printer does not feed the
paper correctly
Control panel operation is
abnormal
Rev. A
Table 5-4. Symptom and Problem
LED do not light up.
Printer mechanism do not operate.
Error is indicated by LED or buzzer
Printing is not performed.
Abnormal printing (missing dots, etc.)
Print quality is poor
No paper is fed.
Paper feed is irregular.
No response to button access.
Problem
Troubleshooting
Flowchart No.
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5-3