No Sound: Audio - Sony KDL-40W900A Service Manual

Troubleshooting
3-3-1. No Sound : Audio (For all models)
#1
#1
No signal
Check the
Digital out
(use Video input)
OK
Check the
Speaker Sound
( (use Video input) p )
NG NG
OK
Check the HP out Check the HP out
OK OK
(use Video input)
NG
Check the IC4501 NG
VDD 3.3V
(IC4501 pin9)
OK
No signal
Check the
IC9000 is NG
CN4801 pin1
(SPDIF input)
OK
CN4801 is NG
Power Amp Block (F4601,IC4601,etc)
is NG. See item: LED blinking 3x is NG See item: LED blinking 3x
(Audio error)
No Problem
DC/DC converter is NG
See No POWER DC / DC
Converter Check
Check the Ch k th
NG
of IC4501 CP & CN
IC4501 VSS -3.3V
(IC4501 pin6)
OK
Check the
NO
X_AUDIO_MUTE_
SPHPLO
pin5 is HIGH?
OK
No signal
Check the
INR+ & INL+ pin1 &14.
(at CL4502 and CL4501) (at CL4502 and CL4501)
Signal is coming?
OK
IC4501 NG
RB1G
W900A/904A/905A
Size B* Board Type G* Board
Type
OTHERS JP
40" BA2-S BA2-W G1A
46" BA2-S BA2-W G1A
55" BA2-S BA2-W G1B
Check the solder Check the solder
NG
(7&8pin) & C4501
OK OK
Solder NG
IC4501 NG
This is MUTE situation.
Check IC9000
IC9001 is NG
Note: Note:
(AYU2) – IC9000
(Brownie)- IC9001
65
CHASSIS