Troubleshooting
LX-300
Swvfce Manual
5.2 UNIT LEVEL TROUBLESHOOTING
YOU may be able to identify the defective unit just from
the
symptom displayed. The table below
,
-~--:,
E
;,’
provides the symptoms for a number of failures, so
that
YOU
~
easily identify
the
problem. Once
the
m-oblem
has been identified, refer to the flowchart listed in
the
right-hand
cAmn
of the table
bel;w
to determine the cause of the problem.
Table 5-7. Symptoms and Problems
Symptom
Problem
See Page
Printer fails to operate
. Carriage does not move.
when the power is on.
5-5
. Control panel indicator LEDs do not light.
Abnormal carnage
●
Caniage
moves away from home position at power on.
operation.
●
The carriage returns to home position correctly, but the
5-6
printer then fails to enter the READY mode.
Printing is faulty
during self-test, but
●
No printing at all.
carriage operation is
5-7
●
Faulty printing — some of the dot are not printing.
normal.
Abnormal paper feed.
●
The printer prints but paper feeds incorrectly.
5-8
Abnormal control
panel operation.
●
When the
LF/FF
button is pressed, no paper is fed.
5-9
Data sent by the host
●
Carriage operates normally at power up, and self-test
computer is printed
is executed correctly, but data
.k
not printed.
5-1o
incorrectly.
●
Data from the computer is printed incorrectly.
I%e
repair procedure flowcharts use the following symbols:
@Em
Start
I
I
II
Processing
0+
Branching
T7
Return to the
Start
of the item
Forwarding to
v
N
END
another item
Decision
$.,,,”
---
f
‘
.
Figure 5-3. Flowchart Symbols
5-4
Rev.A
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