Sharp 9Q-FG1A - Page 21

29Q-FG1A/1F/1N/1S/1U
4 – 3
NO NORMAL SOUND
Set volume to maximum. Is there
any sound output signal at pin 11 &
9 of IC301 ?
Check output
signal at pin 25,
26 of IC1100 and
its related circuit.
No sound from the
speaker.
No sound
comes out at
AV-out J905.
Check if there is
sound input signal
at pin 2 & 4 of
IC301.
NO
YES
Check connection
to the speaker.
Check sound output
signal from pin 23 &
24 of IC1100 and its
related circuit.
Check IC301 &
its surrounding
circuit.
NO
YES
YES
Check input signal
at pin 13 & 14 of
IC3801.
Check IC3801 &
its surrounding
circuit.
NO