Sony KDL-43W950C / KDL-50FA95C / KDL-50FA97C / KDL-50W950C Service Manual ▷ View online
41
Troubleshooting
KK board Side A
Troubleshooting Reference
R4533
CN
4501
4501
F4500
F4501
1
2
3
4
R
4554
R
4553
R
4552
R
4560
R
4559
R
4558
R
4557
R
4556
C4512
C4532
C4534
IC4505
L4503
L4502
L4500
L4501
C4515
C4516
C4517
C4518
42
Troubleshooting
KK board Side A
Troubleshooting Reference
C
N
4501
1
2
3
4
8
13
19
23
24
5
CL450
7
CL450
8
CL451
0
CL450
9
43
Troubleshooting
No Sound
HP / Lineout only
BMX Power On checking
This is for Main SP got sound, but HP / Lineout no
sound
3-3-5. No Sound: HP / Lineout Only for BMX board only
No
Checking Item
OK
NG
If NG
1
Insert HP Jack. Check R7705
Vdc = 3.3V ± 0.3V
Vdc = 0V or < 1V
Check HP_DET line
(R7705 – for BMX)
got short to GND? If short to GND
replace board
.
2
Check IC7701 Pin 5
(X_AUDIO_MUTE_ SPHP)
Vdc = 3.3V ± 0.3V
Vdc = 0V or < 1V
Check X_AUDIO_ MUTE_ SPHP
(Pin 5) short to GND. If short to
GND replace board.
3
Check JL7701 and JL7702.
(with audio signal input)
Can see audio signal
waveform
Cannot see audio signal
waveform
Go to below item No. 4 for
checking
4
Check IC7701 pin 9
Vdc = 3.3V ± 0.3V
No 3.3V supply.
5
Check R7707, R7708
(with audio signal input)
Can see audio signal
waveform
Cannot see audio signal
waveform
Muffin IC (IC1000) NG
GN1 Main Board Power On Checking
44
Troubleshooting
3-3-5. No Sound: HP / Lineout Only for BMX board only
BMX board Side A
Troubleshooting Reference
IC7701
5
9
R7707
R7708
6
7
8
1
14
C7702
R7705
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