Epson FX-880 Service Manual page 119

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