Sony KD-43X85K Service Manual page 86

TROUBLESHOOTING
6.4 Built in Mic Malfunction
Built in mic
doesn't work
OFF
Check Mic hardware
switch on TV
OK
Check harness connection
between Main board
and Receiver Board
OK
Change Receiver board
NG
Change Main board
Switch on mic hardware
NG NG
Connect
properly
OK
Change FFC Cable
between Main board
and Receiver board
Main board: BM5A
Receiver board: HT2
Bboard
FFC 25P
Receiver
Board
86
SYS SET