Epson FX 1170 Service Manual - Page 108

Repair by Unit Replacement - printing problem

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REV.-A 5.2 Repair by Unit Replacement (. ?,> Most printer problems can be corrected by replacing the defective unit. First, identifi the problem from the symptoms you observe using the table below. Then, follow the instructions in the corresponding flowchart to correct the problem. Table 5-3. Symptoms and Flowchart References Symptom Abnormal operation at power on Problem q The carriage does not move. q The indicator LEDs on the control panel do not light. Flowchart no. chart (1) Carriage operation abnormal q Carriage moves away from the home position at power on. chart (2) L." q The printer does not enter READY mode when the carriage returns to the home position. Self test printing abnormal (Carriage operation is normal. ) q The printer does not print the self test. q The printer does not print some of the dots. chart (3) Paper feed abnormality q The printer does not feed the paper. q The paper feed is irregular. chart (4) Control panel operation abnormal q The printer does not feed the paper when you press the PAPER FEED button. chart (5) Incorrect printing of data sent q The printer prints data sent from the host computer chart (6) from the host computer incorrectly, but carriage operation is normal and the 6 'm., ,.. ,>; printer performs the self test correctly. . . ., 5-4

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REV.-A
5.2 Repair by Unit Replacement
Most
printer
problems can be corrected by replacing the defective unit. First,
identifi
the problem from the
symptoms
you observe using the table below. Then, follow the instructions in the corresponding flowchart
to
correct the problem.
Table 5-3. Symptoms and Flowchart References
Symptom
Problem
Flowchart no.
Abnormal operation at
The carriage does not move.
chart (1)
power on
The indicator LEDs on the control panel do not light.
Carriage operation abnormal
Carriage moves away from the home position at
chart (2)
power on.
The printer does not enter READY mode when the
carriage returns to the home position.
Self test printing abnormal
The printer does not print the self test.
chart (3)
(Carriage
operation is
The printer does not print some of the dots.
normal. )
Paper feed abnormality
The printer does not feed the paper.
chart (4)
The paper feed is irregular.
Control panel operation
The printer does not feed the paper when you press
chart (5)
abnormal
the PAPER FEED button.
Incorrect printing of data sent
The printer prints data sent from the host computer
chart (6)
from the host computer
incorrectly, but carriage operation is normal and the
printer performs the self test correctly.
(,
...??>
L.”
6
‘
m.,
,..
,>;
.
.
.
.,
5-4