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Model
KDL-60W840B KDL-60W850B KDL-60W855B KDL-60W857B KDL-70W830B KDL-70W840B KDL-70W850B KDL-70W855B KDL-70W856B KDL-70W857B
Pages
112
Size
15.03 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LEVEL3
File
kdl-60w840b-kdl-60w850b-kdl-60w855b-kdl-60w857b-kd.pdf
Date
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Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual ▷ View online

Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
45
RB2G
CHASSIS
W850B
Troubleshooting
No Sound
3-3-5.  No Sound: HP / Lineout Only for BAX-L (HEL,HEH,HM) board only
Note: 
(AYU2/
Ayu2L
) –
IC9000
(Brownie)- IC9001
HP / Lineout only
BAX-LPower On checking
This is for Main SP got sound, but HP / Lineout no sound
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  
(R7020 – for BAX-L)
got short to GND
? If short to GND
got short to GND
? If short to GND 
replace board.
2
Check IC4501 Pin 5 
(X AUDIO MUTE  SPHPLO)
Vdc = 3.3V ± 0.3V
Vdc = 0V or < 1V
Check X_AUDIO_ MUTE_ SPHLO 
(Pin 5) short to GND. 
If short to GND 
( _
_
_
)
(
)
replace board.
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
. Please refer 
item 3-3-1. No POWER DC / 
DC Converter Check
.
5
Check CL4501 CL4502
Can see audio signal
Cannot see audio signal
Brownie IC (IC9001) NG
5
Check CL4501, CL4502
(with audio signal input)
Can see audio signal 
waveform
Cannot see audio signal 
waveform
Brownie IC (IC9001) NG
 
2.3-4 - No Sound: HP / Lineout Only for BAX-L Board
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
46
RB2G
CHASSIS
W850B
BAX-L board Side A
Troubleshooting Reference 
BAX L board Side A
PLO
 (Pin 5
)
U
DI
O_MUT
E
_ 
SPH
CL4502
X_A
U
IC4501
CL4501
(Pin 9)
VDD
 
BAX-L Board (Side A)
 
 Trouble Shooting Reference
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
47
RB2G
CHASSIS
W850B
BAX-L board Side A
Troubleshooting Reference 
BAX L board Side A
PLO
 (Pin 5
)
U
DI
O_MUT
E
_ 
SPH
CL4502
X_A
U
IC4501
CL4501
(Pin 9)
VDD
 
BAX-L Board (Side A)
 
 Trouble Shooting Reference
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
48
RB2G
CHASSIS
W850B
BAX-L board Side A
Troubleshooting Reference 
BAX L board Side A
CL4505
R4508
CL4506
R7020
 
BAX-L Board (Side A)
 
 Trouble Shooting Reference
Page of 112
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