Epson FX-880 Service Manual page 44

Condition
Symptom
The printer The CPU
dose not dose not
operate at operate.
all.
The carriage The carriage
operates dose not
abnormally. operate at
all.
Rev. A
Table 3-9. Repair of the C229MAIN (continued)
Cause
The CPU is
defective.
IC8 is
defective.
Checkpoint
Verify the oscillator signal at pin 26
or 27 of the CPU (IC3).
Figure 3-17. Clock Signal of CPU
Verify the CR motor phase control
signals at pin 5, 6, 16,17, and motor
drive signals at pin 1, 8, 11, 18 of
IC8.
Figure 3-18.
CR Motor Control Signal
FX-880 Service Manual
Chapter 3 Troubleshooting
Solution
Replace the
C229MAIN
board.
Replace the
C229MAIN
board.
3-14