Sony BRAVIA KDL-55W900A, Service Manual

Page: 73 / 241

RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
3-3-2. No Sound : Audio (Additional : For Europe models only)
#1
#1
Check the SCART
(use Digital RF
#
OK
Check the
No Problem
NO
This is MUTE situation
(use Digital RF
Tuner input)
CNT pin7 (IC4511)
is HIGH?
No Problem
NG
This is MUTE situation.
Check IC9000
OK
Check the IC4511
pin 3
VCC 3.3V
DC/DC converter is NG
See to section “3-1-2. No
POWER: Ayu2 Control
NG
IC9001 is NG
No signal
INR & INL
pin10 &1 (IC4511)
(at CL4512 and CL4511)
Signal is coming?
OK
NG
IC4511 NG
OK
Check the
Signal is coming?
Check the solder
(*)
OK
NG
NG
OK
IC4511 pin 6
VEE-3.3V
Of IC4511 CP & CN
(4&5pin) & C4511
Size B* Board Type G* Board
Type
OTHERS JP
40” BA2-S BA2-W G1A
N t
IC4511 NG
OK
Solder NG
OK
73
46” BA2-S BA2-W G1A
55” BA2-S BA2-W G1B
Note:
(AYU2) – IC9000
(Brownie)- IC9001