LC-32L407I
6 – 5
No audio heard (1)
No sound in the UHF/VHF reception.
Is the IF output from the tuner pin (12) of TU1101 as specified?
NO
Check TU1101 and its peripheral circuits.
YES
Is there the I2S signal input at pins (180), (181) of IC3301?
NO
Check IC3301 and its peripheral circuits.
YES
Is there L-ch audio signal input at pin(3) of IC2701?
NO
Check connection between IC3301 and IC2701 and its
peripheral circuits.
Is there R-ch audio signal input at pin(7) of IC2701?
YES
Is the L-ch audio signal output at pin(27), (28), (29) and (30) of IC2701
normal?
NO
Check IC2701 and its peripheral circuits.
Is the R-ch audio signal output at pin(11), (12), (13) and (14) of IC2701
normal?
YES
Are the audio signal L-ch and R-ch output at (1)/(2) and (3)/(4) of
P2701 normal?
NO
Check circuit between IC2701 & P2701.
YES
Check speakers and their peripheral circuits.
