- 23 -
All input source has
no sound output
Check
whether pin 34/36
of STV_8317 has signal
output
Check
whether power
supply of power amplifier
board TDA7266 is
normal
Check
whether
TDA7266_6
pin is high level
Check STV8317 and
peripheral elements
Check power supply loop
of
TDA7266
Check mute control circuit
Check
whether audio output
pin waveform of
TDA7266P is
normal
Change TDA7266P
Check speaker and line
Y
N
Y
N
Y
N
Y
N
Y
[ Flow chart 3 ] Symptom: no sound
Description: there is image, but no audio output.
