Sharp LC-32M400M-BK Service Manual page 32

LC-32M400M-BK/WH/RD
No external audio heard
<INPUT 4>
Is there the L-ch audio signal input from pin (8) of input terminal
SC5201 to pin (77) of IC3301?
Is there the R-ch audio signal input from pin (9) of input terminal
SC5201 to pin (78) of IC3301?
<INPUT 5>
Is there the L-ch audio signal input from pin (10) of input terminal
SC5201 to pin (75) of IC3301?
Is there the R-ch audio signal input from pin (11) of input terminal
SC5201 to pin (76) of IC3301?
<INPUT 6>
Is there the L-ch audio signal input from pin (1) of input terminal
SC5202 to pin (72) of IC3301?
Is there the R-ch audio signal input from pin (2) of input terminal
SC5202 to pin (73) of IC3301?
Is there the I2S signal input at pin (180), (181) of IC3301?
Is there L-ch audio signal input at pin(3) of IC2701?
Is there R-ch audio signal input at pin(7) of IC2701?
Is the L-ch audio signal output at pin(27), (28), (29), (30) and (31)
of IC2701 normal?
Is the R-ch audio signal output at pin(11), (12), (13), (14) and (15)
of IC2701 normal?
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P2701 normal?
Check speakers and their peripheral circuits.
No audio heard (2)
YES
YES
YES
YES
YES
NO Check IC3301 and its peripheral circuits.
NO Check connection between IC3301 and IC2701 and its periph-
eral circuits.
NO Check IC2701 and its peripheral circuits.
NO Check circuit between IC2701 & P2701.
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