Philips HTL4111B/12 Service Manual page 23

BT does not work
Power line of Audio PCB is short
Check the DUT whether
open the BT function
Check voltage STB_3Y3
at U19 on FE Board
whether normal or not
Check the BT Module U19
output whether normal or
not
Check BT output after OP
U20 whether normal or not
Change the Main PCB
5-5
yes
yes
yes
yes
yes
no
Open BT function
no
Check the FFC connector from
Main PCB to FE PCB
Change the BT Module
no
no
Change the U20
Trouble shooting Chart