Sony KD-43X7 G Series Service Manual page 23

2.2 : 3x Blinking – Audio Error
B Board
B-board Audio Error pin
short to GND
No connectivity of (F3101 or F3102)
(F3101 or F3102) broken,
Replace (F3101 or F3102)
3x blinking & (F3101 or F3102) OK
No 3x blinking
START
3x blinking
Disconnect power supply
and check Audio Error pin
Audio Error pin no short to GND
Remove Speaker Connector
No 3x blinking
at CN3109 and
perform AC OFF - ON
3x blinking
Check connectivity
of (F3101 or F3102)
3x blinking &
(F3101 or F3102) OK
#Audio IC (IC3101) problem
Change B-board
DONE
Check Speaker harness and
Speaker impedance
Speaker harness
shorted
3x blinking
Change Speaker
Harness
Connect back
Speaker Connector
to CN3109 and
perform AC OFF - ON
No 3x blinking
Important Note :
TV must be power OFF condition before
plug or unplug any of the
FFC/FPC/wire/cable from the board. ->
This is to prevent possibility circuit
damage happen.
Main Speaker
Impedance ≠ 6~8 Ω
Change Main
Speaker
23
SYS SET