Sharp LC-32LE250M Service Manual page 21

No sound in the UHF/VHF reception.
Is the IF output from the tuner pin (8) of TU1101 as specified?
YES
Is there the I2C signal input at pins (42), (43) of IC3301?
YES
Is thereaudio signal intput at pin(22),(32) of IC1702?
YES
Is the L-ch audio signal output at pin(10),(11),(16),(17) of IC1702
normal ?
Is the R-ch audio signal output at pin(2),(3),(8),(9) of IC1702 normal ?
YES
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1702 normal?
YES
Check speakers and their peripheral circuits.
No audio heard (1)
NO Check TU1101 and its peripheral circuits.
NO Check IC3301 and its peripheral circuits.
NO Check connection between IC3301 and IC1702 and its
peripheral circuits.
NO Check IC1702 and its peripheral circuits.
NO Check circuit between IC 1702 & P1702.
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LC-32LE250M