Epson LQ-570 Service Manual page 38

REV.-A
Problem
The carnage
Carnage
operates operation Is
abnormally
of torque)
Self-test Self-test w not
executed
IS
abnormal
A particular
dot IS not
being printed
)
Paper Is not
The paper
does not feed,
or the feed
abnormal
Symptom Cause
Is
The CPU can
not measure
the voltage on
the +35V hne
Is
defective
Is
IS
Checkpoint
Measure the voltage at pm 59(Vref) of
At IC11, check the input signal at
101 and the output signal at pm 46
Is
For example, check the output signal at
Check the input signal at pml and the
output signal at pm2
5-16
Replace
(Refer to
4 3 )
Replace
IC4D
Replace IC4
-
Replace IC3