Sanyo PDG-DSU20N Service Manual page 31

Power Source Troubleshooting:
No Power Source
after turning on
Check AC socket and
connector
OK
Check
Safety Switch
OK
Check 7PIN power
wire
OK
Check 9 pin
Power output
OK
Replace mainboard
How to check the power board?
- check the 380v output on connector 3 see page 43
- check the fuse on the power board
PDG-SU20
NG
Replace AC
socket
NG
Replace safety
switch or reinstall
NG
Replace power
wire
NG
Check
Fuse
OK
Replace power board
Fan failure after
turning on
Check fan
connection
OK
Check
Fan
OK
Check
Mainboard
NG
Replace fuse
How to check the main board?
PIN 1
- check the voltage on the 9 pins.
- Other M/B information in Appendix D.
27
NG
Reconnect fan
NG
Replace fan
NG
Replace
Mainboard
Pin1: +5VS
Pin2: GND
Pin3: +5VS
Pin4:TP40
(function:Change
power net)
Pin5: GND
Pin6: GND
Pin7: GND
Pin8: +12V
Pin9: +12V