Service manual

Troubleshooting
Rev. A
5-
3
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.
Table 5-4. Symptom and Problem
Symptom Problem Flowchart No.
The printer does not operate at all. No LED lights up.
The printer mechanism does not operate at all.
1
An error is indicated. Error is indicated by LEDs. 2
Printing operation is abnormal. Printing is not performed.
Printing result is abnormal.
Print quality is poor.
3
The printer feeds paper
abnormally.
Paper feed is abnormal.
Paper is jamming.
The top edge of the paper is improperly
positioned.
4
Control panel operation is
abnormal.
Button operation has no affect on the printer. 5