
Troubleshooting
SF150T
6-5
Y
Y
N
N
output shorted ?
Start
N
Y
Y
N
Remove short
Replace D3
OVP operation
Restart
Replace Q3
Check CON1
D3 Open or
Shorted ?
Check
OVP operation
Q3 OK ?
End
6-2-3 No + 24 V
6-2-4 + 24 V TPH Doesn't output
Y
N
Check
C/S port short ?
Start
N
Y
Remove short
Replace Q5
Check CON1
Q5 OK ?
End