Sony KD-43X7 F Series Service Manual page 22

3.3 : 3x Blinking – Audio Error
B Board
B-board Audio Error pin
short to GND
No connectivity of F3101
F3101 broken,
Replace F3101
3x blinking & F3101 OK
No 3x blinking
START
3x blinking
Wrong Option bit
Check correct Option bit is set?
Correct Option bit & 3x blinking
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
3x blinking
Check connectivity
of F3101
3x blinking & F3101 OK
#Audio IC (IC3101) problem
Change B-board
DONE
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.
Set correct Option bit and
perform AC OFF - ON
Check Speaker harness and
Speaker impedance
Speaker harness
shorted
Change Speaker
Harness
Connect back
Speaker Connector
to CN3109 and
perform AC OFF - ON
No 3x blinking
No 3x blinking
Main Speaker
Impedance ≠ 6~8 Ω
Change Main
Speaker
(Supplementary 22
information)
SYS SET