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Manuai
Tmubieshooting
Table
5-6. Repair of the C137 MAIN (Cont.)
Symptom Condition Cause
Checkpoint
Solution
Check the output signal at pin 1,
8 or 11, 18 of
IC15.
s
Carriage
s
does not
The carriage
does not
t
a a
t
i
ICI 5 is defective.
1
Replace
IC15.
operate
normally.
operate at all.
I
%
%
50V
lo*
Check the output signal at pin 13
or 14 and pin 15 or 16 of
IC2.
%
I
=
I
Self-test
IC2
is defective.
Replace
IC2.
Self-test is
{
printing is
abnormal.
not executed.
I
%
I I
Wqw
I
s
@lm
~~
Printhead
unit is
Replace
defective.
printhead
unit.
Check the serial signal output
from pin at 39 or 40 of
IC2
to the
driver
IC14.
s
z
IC2
is defective.
Replace
IC2.
4
-
I
$
Paper feed
The paper
does not
feed
motor
Sv
s
bq
operate
does not
normally.
rotate.
Check the output signal at pin 1,
8 or 11,18 of
IC14.
s
%
IC14
is defective.
y
r
1
I
Replace
IC14.
,
*
%
%
WV
low