Sharp LC-32L407I, Руководство по обслуживанию

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LC-32L407I
6 – 9
No audio heard (5)
No PC audio output
YES
Pin (2) of J506: Is L-ch input into the pin (70) of IC3301?
Pin (3) of J506: Is R-ch input into the pin (71) of IC3301?
YES
Are I2S signal output from the pins (180), (181) of IC3301 normally? NO Check peripheral circuits of IC3301.
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.