Epson FX-880 Service Manual page 118

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