Sharp LC-32LE260M Service Manual page 11

LC-32LE260M
No external audio heard
<INPUT 2>
Is there the L-ch audio signal input from pin (30) of input terminal
TL511 to pin (39 ) of IC 3301?
Is there the R-ch audio signal input from pin (26) of input terminal
TL510 to pin(40) of 3301?
<INPUT 3>
Is there the L-ch audio signal input from pin (20) of input terminal
TL508 to pin (35) of 3301?
Is there the R-ch audio signal input from pin (15) of input terminal
TL507 to pin (36 ) of IC3301?
Is there the I2C signal input at pin (55), (56) of IC3301?
Is there audio signal input at pin(4),(10) of IC1701?
Is the L-ch audio signal output at pin(26),(27),(29),(30)of
IC1701
Is the R- ch audio signal output at pin(20),(21),(23),(24) of IC1701
normal ?
Are the audio signal L-ch and R-ch output at (1)/(2) and (3)/(4) of
P1701 normal?
Check speakers and their peripheral circuits.
No audio heard (2)
YES
YES
YES
YES
YES
NO Check IC3301 and its peripheral circuits.
NO Check connection between IC3301 and IC1701 and its periph-
eral circuits.
NO Check IC1701 and its peripheral circuits.
NO Check circuit between IC1701 & P1701 .
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