Sony KDL-50W7 C Series, Service Manual

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38
Troubleshooting
3-3-5. No Sound : Scart Out Audio (For Europe model) BMX board only
No Sound
SCART out only
BMX Power On checking
This is for Main SP got sound, but SCART out no sound.
Please check this condition in Digital RF mode
GN1 Main Board Power On Checking
No Checking Item OK NG If

NG
1 Check CL7851 ,CL7852.
(with audio signal input –
Digital RF mode) Can see output audio signal
waveform Cannot see audio
signal waveform Go to checking
3-3-2: NO SOUND:
Audio (Additional : For
Europe models only)
2 Check IC7851 pin3 Vdc = 3.3V ± 0.3V No 3.3V supply
3 Check C7854, C7855
(with audio signal input –
Digital RF mode) Can see input audio signal
waveform Cannot see audio
signal waveform Muffin IC (IC1000) NG