Epson DFX-5000+ Service Manual page 188

Table 5-9. C117 PSB Board Assembly Component Repair (continued)
Symptom
Fuse Fl The line filter circuit is
blows defective.
immediately
after replace-
ment.
The +35 The main switching
VDC line is
dead. are defective.
defective.
defective.
EPSON DFX-5000+ Service Manual
Cause
Check if any of pins Cl -C6 or Rl
is shorting the AC line.
Check the voltage waveform
between the drain side and GND.
Observe voltage waveform
between the collector side and
GND.
Check the voltage waveform
between the collector side and
Checkpoint
Troubleshooting
Solution
Replace the
abnormal
element.
Replace
Q201.
Replace
Q201.
Replace
Q203.
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