Troubleshooting - Epson LX-1050+ Service Manual

5.3 TROUBLESHOOTING

This section describes the troubleshooting of abnormal operations and circuit board unit repair.
5.3.1 Troubleshooting of Abnormal Operation
This section describes how to detect malfunctions, how to determine the cause, and what actions to
take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting
table.
Symptom
The printer does not operate at all.
The LEDs on control panel does not
The buttons on control panel does not
operate
Carriage error displayed
Paper is not fed
Paper out displayed
Abnormal voltage displayed
Incorrect SRAM disdaved
Incorrect RAM inside CPU displayed
Self test abnormal
Self test printout has poor quality
Abnormal print in on line mode
Rev. A
Table 5-4. Symptoms and Problems
Printer mechanism does not starl
initialize, when power on.
The printer mechanism start initialized,
but LEDs does not operate.
The printer does not change state, when
push the button.
The printer display carriage error, when
power on.
The paper is not fed from tractor.
The paper is not fed from manual feed
slot.
,
The printer display incorrect RAM inside
CPU.
The carriage is moved, but the printhead
does not print.
Dot missing
The printer does not print.
Printer Condition
Troubleshooting
5-5
I
5-6
5-7
5-8
5-9
5-1o
5-11
5-12
1
5-14
5-15
5-16
I
5-17
5-18
5-19
5-20
5-3