Sharp LC-24LE150M

LC-24LE150M
7 – 5
No audio heard (2)
No external audio heard
<INPUT 2>
Is there the L-ch audio signal input from pin (4) of input terminal
TL508 to pin (47) of IC3301?
Is there the R-ch audio signal input from pin (5) of input terminal
TL510 to pin (48) of IC3301?
<INPUT 3>
Is there the L-ch audio signal input from pin (2) of input terminal
TL504 to pin (49) of IC3301?
Is there the R-ch audio signal input from pin (3) of input terminal
TL506 to pin (50) of IC3301?
YES
Is there the I2C signal input at pin (29), (30) of IC3301? NO Check IC3301 and its peripheral circuits.
YES
Is there audio signal input at pin(4),(10) of IC1701? NO Check connection between IC3301 and IC1701 and its periph-
eral circuits.
YES
Is the L-ch audio signal output at pin(20), (21) ,(23),(24) of IC3301? NO Check IC1701 and its peripheral circuits.
Is the R-ch audio signal at pin
YES
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1701 normal?
NO Check circuit between IC1701 & P1701.
YES
Check speakers and their peripheral circuits.
(26)(27)(29)(30) of IC1701 normal ?