Sharp LC-32M400M-BK, Руководство по обслуживанию

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LC-32M400M-BK/WH/RD
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), (30) and (31) of
IC2701 normal? NO Check IC2701 and its peripheral circuits.
Is the R-ch audio signal output at pin(11), (12), (13), (14) and (15) of
IC2701 normal?
YES
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P2701 normal? NO Check circuit between IC2701 & P2701.
YES
Check speakers and their peripheral circuits.