Bt Has No Sound - Philips FX20 Service Manual

BT has no sound

Go
Check whether there is audio signals
of the 4 and 8 pin of XP11
Yes
Check whether there is audio signals of
the 22 and 24 pin of XP82
Yes
Confirm whether there is audio signals of
the 5 and 14 pin of U17
Yes
Confirm whether there is audio signals of
the 3 and 13 pin of U17
Yes
Check whether it is right of the
IIS signal between U16 and MPEG
Yes
Check the signal output from U20
Yes
Confirm whether there is PWM wave of
the 2 pin of U21
\
5-4
BT board
No
and change it
No
Check the connection of VFD board
and main board
No
Check the connection of R162 and
R169 to U17
No
U17 has problem
If MCLK, BLCK and LRCLK of IIS signal
isn't normal ,MPEG has problem .
No
If data
problem.
No
U20 has problem
No
U21 has problem
Trouble shooting Chart
has problem
line has no output,U16 has