Sony BRAVIA KDL-55W900A, Service Manual, Page: 46 / 241

RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
3-2-2. LED BLINKING 3x (Audio Error) – BA2 and BM board only
Size B* Board Type G* Board
Type
OTHERS JP OTHERS JP
40” BA2-S BA2-W G1A
46” BA2-S BA2-W G1A
55” BA2-S BA2-W G1B
F4601,IC4601 ,etc
(B* Board)
#2
IC4601 ,etc
(B* Board)
#3
Check 12.5V
( at F4601) to GND
Replace F4601
High
enough
Check the IC4601
Out pin 9, 16, 25, 32
Switching 0V to 12V
No
Check the IC4601
pin 18 (at CL4606)
is HIGH?
No
impedance
Low impedance
IC4601 or parts around IC4601 NG
around 300-400kHz
Yes
Yes
Solder NG
IC4601
Check broken parts
IC4601 or parts around IC4601 NG
Check the CN4601
DC level ~2V (at
No
L4601-L4604
or
C4611-C4614
No
burn or broken ?
Yes
around IC4601
JL4621~JL4624)
C4611-C4614
NG
Yes
Check the IC4601
I2S line pin 5, 6, 7, 8
NG
Replace IC4601
I2S line pin 5, 6, 7, 8
(at CL4601~CL4604)
IC9000 NG
OK
Note:
46
IC4601 NG
Note:
(AYU2) – IC9000
(Brownie)- IC9001