Service manual

Troubleshooting
5-16
EPSON FX-880/FX-1180 Service Manual
Table 5-11. Repairing the C229 PSB/PSE Board (continued)
Symptom Condition Possible
Cause
Checkpoint Solution
The printer
does not
operate.
(continued)
The +5 V line is
defective.
IC51 is
defective.
Check the voltage waveform
at pin 5 of IC51. You can use
pin 9 as the ground.
Replace the
power supply
board.
Check the voltage waveform
at pins 9 and 10 of IC51.
Use the frame as the ground.
Replace the
power supply
board.