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

Troubleshooting
3-2-3. LED BLINKING 3x (Audio Error) – BKE and BKX board only (Not applicable for this model)
#2
F4601,IC4601,etc
(B* Board)
High
Check 19.5V
enough
(at fuse F4601)
to GND
impedance
Low impedance
IC4601
burn or broken ?
Yes
Replace IC4601
Replace F4601
No
Check broken parts
around IC4601
#3
IC4601,etc
(B* Board)
Check the IC4601
Check the IC4601
Out pin 38, 42, 43, 47 No
pin 18
Switching 0V to 19V
around 300-400kHz
Yes
IC4601 or parts around IC4601 NG IC4601 or parts around IC4601 NG
Check the CN4601
No
DC level ~9.7V
(at JL4621~JL4624)
Yes
Check the IC4601
NG
I2S line pin I2S line pin
4, 12, 15, 16 (at
CL4601~CL4604)
OK
IC4601 NG
Size B* Board Type
OTHERS OTHERS
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
C 6 C4611-C4614 C 6
NG
IC9000 NG
Note:
(AYU2) – IC9000
(Brownie)- IC9001
RB1G CHASSIS
W900A/904A/905A
G* Board
Type
JP JP
G1A
G1A
G1B
50