Epson FX-880 Service Manual page 45

Condition
Symptom
The paper The paper
feeds dose not
abnormally. feed at all.
The self test
printing is
Self test not executed
printing is or a
abnormal. particular dot
is not
printed.
Data from Data
the host corruption
computer is occurs when
printed the interface
incorrectly. is used.
Rev. A
Table 3-10. Repair of the C229MAIN (continued)
Cause
IC 11 is
defective.
Any
transistor of
Q2 - Q10 is
defective.
Any
transistor
from Q11 to
Q25 is
defective.
IC2 or CPU
is defective.
Checkpoint
Verify the PF motor phase control
signals at pin 1, 2, 23, 24, and
motor drive signals at pin 3, 6, 18,
21 of IC11.
Figure 3-19.
PF Motor Control Signal
Verify the printhead drive signal at
the corrector and base of Q2 - Q11
Figure 3-20.
Pritnhead Drive Signal
-
-
FX-880 Service Manual
Chapter 3 Troubleshooting
Solution
Replace the
C229MAIN
board.
Replace the
C229MAIN
board.
Replace the
C229MAIN
board.
Replace
C229MAIN
board.
3-15