Trouble Shooting; Main Board - Sony S75F Service Manual

6. Trouble shooting

6.1 Main board

No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Measure U602 PIN2=3.3V
C609(+)=1.8V
X301 oscillate waveforms
are normal
No power
NG OK
NG
OK
NG
OK
NG
OK
Replace U301
OK
Reinsert or check
the power section
Check Correspondent
component.
Check Correspondent
component.
40
S75F Sony