REV.-A
5.2 REPAIR BY UNIT REPLACEMENT
For most problems, it is sufficient for you to determine the difficulty to the unit level. Refer to Table
5-3, identify what the problem is, then perform the checks according to the corresponding flowchart.
Table 5-3. Symptoms and Reference Pages
Symptom
Problem See Page
Printer fails to operate when
● Carriage does not move.
5-3
power is on.
● Control
panel
indicator lamp does not light.
Carriage operation is abnor-
. Carriage moves away from home position at power
5-4
real. on.
s
The carriage returns to the home position correctly,
but the printer then fails to enter the READY
mode.
Printing is faulty during
self- ● No printing at all. 5-5
test, but carriage operation is
● Fau Ity printing - some of the dots are not printed.
normal.
Paper feeding is abnormal.
● No paper is fed. 5-9
. Regular paper feed, but with variations in the
separa-
tions between lines.
Control panel operation is
I
. When the LF switch is activated, no paper is fed.
I
5-12
abnormal.
Printing of data sent by the . Carriage operates normally at power on, and self-test
5-13
host computer is faulty. is executed correctly.
● Print data from the computer, however, is not printed
correctly.
..”
”
5-2
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