Epson FX-870

Principles of Operation
Table 6-8. Repairing the C094 MAIN Board Assembly (Continued)
Problem
Symptom
Cause
Checkpoint
Solution
Paper feed The printer
ICl is
Check the input signal (pin 2) and the output Replace ICl
abnormal.
does not feed defective. waveform (pin 3).
the paper at
all or the
paper feed is
irregular.
Incorrect
Data is
Either IC4 or
printing of
corrupted
IC5 is
data sent
when the
defective.
from the
parallel
host
interface is
computer.
used.
Replace IC4
or IC5.
Epson FX-87011170
6-37