Service manual

Troubleshooting
EPSON FX-880/FX-1180 Service Manual
5-15
Table 5-11. Repairing the C229 PSB/PSE Board (continued)
Symptom Condition Possible
Cause
Checkpoint Solution
The printer
does not
operate.
(continued)
The +35 V line is
defective.
(continued)
Q2 or Q3 is
defective.
(continued)
Check the voltage waveform
between the collector and
emitter of Q2 and Q3.
Replace the
power supply
board.
PC1 is defective Check the voltage waveform
at pins 5 and 7 of PC1. The
frame may be used as the
ground.
Replace the
power supply
board.