Sharp LC-60LE631M-WH, Service Manual

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LC-60LE631M/X-WH
6 – 3
No audio heard (2)
No external audio heard
<INPUT 4>
Is there the L-ch audio signal input from pin (15) of input terminal
J504 to pin (AE2) of IC3303?
Is there the R-ch audio signal input from pin (8) of input terminal
J504 to pin (AE3) of IC3303?
<INPUT 5>
Is there the L-ch audio signal input from pin (16) of input terminal
J504 to pin (AB1) of IC3303?
Is there the R-ch audio signal input from pin (10) of input terminal
J504 to pin (AA1) of IC3303?
<INPUT 6>
Is there the L-ch audio signal input from pin (2) of input terminal
J503 to pin (Y1) of IC3303?
Is there the R-ch audio signal input from pin (4) of input terminal
J503 to pin (AA3) of IC3303?
YES
Is there the I2S signal output at pin A8, C7, B7 and D8 of IC3303? NO Check IC3303 and its peripheral circuits.
YES
Is there I2S_LRCLK signal input at pin(9) of IC2707? NO Check connection between IC3303 and IC2707 and its periph-
eral circuits.
YES
Is there AMP_LRCLK signal input at pin(8) of IC2704? NO Check connection between IC2707 and IC2704 and its periph-
eral circuits.
YES
Is the L-ch audio signal output at pin(28) and (30) of IC2704 nor-
mal? NO Check IC2704 and its peripheral circuits.
Is the R-ch audio signal output at pin(12) and (14) of IC2704 nor-
mal?
YES
Are the audio signal L-ch and R-ch output at (4)/(5) and (1)/(3) of
P2702 normal? NO Check circuit between IC2704 & P2702.
YES
Check speakers and their peripheral circuits.