Epson 4003353 - Manual (Page 109)

Service
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
Carriage
does not
The carriage
does not
ICI 5 is defective.
Replace
operate
normally.
operate at all. I
lo*
Check the output signal at pin 13
or 14 and pin 15 or 16 of
I
Self-test
is defective. Replace
Self-test is
printing is
abnormal.
not executed.
I I I
I
unit is Replace
defective. unit.
Check the serial signal output
from pin at 39 or 40 of to the
driver
is defective. Replace
I
Paper feed The paper
does not feed
operate does not
normally. rotate. Check the output signal at pin 1,
8 or 11,18 of
is defective. r Replace
,