Sony BRAVIA KDL-55W900A, Service Manual, Page: 65 / 241

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