Led Blinking 3X (Audio Error) – Ba2 And Bm Board Only - Sony KDL-40W900A Service Manual

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