Sony KDL-65W850A / KDL-65W855A Service Manual ▷ View online
RB1G
CHASSIS
W850/855A
Troubleshooting
Troubleshooting Reference
Board Name
Board PWB (B side)
Detail
BA2-S/W
R8558
R8558
33
3-3. NO SOUND
N S
d
No Sound
“Audio System”
Check the
“Speakers setting”
Change to
“TV Speaker”
“TV Speakers”
Change the Speaker
Harness
Replace
the B* Board
NG
TV Speakers
Symptom
improvement
No Sound: Audio
B* Board
Harness
the B Board
NG
Symptom
improvement
No Sound: Tuner
Speaker Harness
Speaker
No Sound: HDMI
34
RB1G
CHASSIS
W850/855A
Troubleshooting
#1
#1
3-3-1. NO SOUND: Audio (For all models)
Check the
Digital out
IC9000 is NG
No signal
Check the
IC4501 VSS -3.3V
Check the
CN4801 pin1
No signal
Check the solder
of IC4501 CP & CN
NG
NG
(use Video input)
(IC4501 pin6)
(SPDIF input)
OK
CN4801 is NG
OK
(7&8pin) & C4501
Solder NG
OK
OK
NG
Check the
IC4501 NG
Check the
Speaker Sound
(use Video input)
Power Amp Block (F4601,IC4602,etc)
is NG. See item, 2.1 LED blinking 3x
(A di
)
Check the HP out
(use Video input)
OK
OK
X_AUDIO_MUTE_
SPHPLO
pin5 is HIGH?
(Audio error)
N P bl
NO
This is MUTE situation.
Check IC9000
OK
#3
(use Video input)
No Problem
NG
Check the
INR+ & INL+ pin1 &14.
IC9001 is NG
No signal
OK
Check the IC4501
VDD 3.3V
(IC4501 pin9)
DC/DC converter is NG
See No POWER DC / DC
Converter Check
(page 4).
NG
(at CL4502 and CL4501)
Signal is coming?
OK
OK
IC4501 NG
35
RB1G
CHASSIS
W850/855A
Troubleshooting
BA2 board Side B
C
CN4801
Vi
n
(
p
in
1
Vcc
)
36
RB1G
CHASSIS
W850/855A
Troubleshooting
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