Samsung SV-4000W Service Manual page 30

5. Troubleshooting
Check AC power cord
Replace D31,D32,D33,D34,
D35,D36
Samsung Electronics
S.M.P.S in operate
Yes
Yes
Check voltage
of bridge diode
BD(+)
Yes
Check switching
waveform of
IC01-1
Yes
Check voltage of
CN1-3,4,5,6,
7,8,9
No
Replace AC power cord
No
Recheck and replace
BD01, FUSE, R01
No
A
No
Check a shortage/open of each
pin and pattern
Yes
Check output line of D31,D32,
D33,D34,D35,D36
Replace transformer
No
5-1