Unit Level Troubleshooting - Epson Stylus COLOR 1520 Service Manual

5.2 Unit Level Troubleshooting

This section provides flowcharts which enables you to isolate the defective unit. Once the defective unit is
identified by following the corresponding chart, refer to Section 5.3 and 5.4 to identify more specific part to
be replaced at the component level.
Symptom
The printer does not operate at all. „ No LED lights up.
An error is indicated.
Printing operation is abnormal.
The printer feeds
abnormally.
Control panel operation is
abnormal.
Rev. A
Table 5-4. Symptom and Problem
„ The printer mechanism does not operate at all.
„ Error is indicated by LEDs.
„ Printing is not performed.
„ Printing result is abnormal.
„ Print quality is poor.
„ Paper feed is abnormal.
paper
„ Paper is jamming.
„ The top edge of the paper is improperly
positioned.
„ Button operation has no affect on the printer.
Problem
Troubleshooting
Flowchart No.
1
2
3
4
5
5-3