Sony Bravia KDL-42W800A, Service Manual, Page: 96 / 238

RB1G CHASSIS
W800A/W801A/W802A/W804A/W805A/W806A/W807A/W808A/W809A
Troubleshooting
No Sound
3-3-5. No Sound: HP / Lineout Only
Note:
(AYU2) – IC9000
(Brownie)- IC9001
Size
B* Board Type
OTHERS JAPAN
42 BA2S BA2W
HP / Lineout only
BA2 / BM / BKE / BKX Power
On checking
This is for Main SP got sound, but HP /
Lineout no sound
47 BA2S BA2W
55 BA2S BA2W
RB1 Main Board Power On Checking
No Checking Item OK NG If

NG
1 Insert HP Jack. Check R4508 Vdc = 3.3V ± 0.3V Vdc = 0V or < 1V Check HP_DET line
(R8113 – for BA2 and BM)
(R8124 – for BKE and BKX) got
(R8124 for BKE and BKX) got
short to GND?
2 Check IC4501 Pin 5
(X AUDIO MUTE SPHPLO) Vdc = 3.3V ± 0.3V Vdc = 0V or < 1V Check X_AUDIO_ MUTE1_ SPHLO
(Pin 5) short to GND? ( _ _ _ ) ( )
3 Check CL4505, CL4506.
(with audio signal input) Can see audio signal
waveform Cannot see audio signal
waveform Go to below item No. 4 for checking
4 Check IC4501 pin 9 Vdc = 3.3V ± 0.3V No 3.3V supply
5 Check CL4501, CL4502
(with audio signal input) Can see audio signal
waveform Cannot see audio signal
waveform Brownie IC (IC9001) NG
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