3X Blinking – Audio Error - Sony KD-43XE7 Series Service Manual

3.2 : 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
Check correct Option bit is set?
Wrong Option bit
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
Change Main
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
Speaker
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