Sharp LC-22DC30M Service Manual page 28

LC-22DC30M
No sound in the UHF/VHF reception.
Is the IF output from the tuner pin (10) of TU1101 as specified?
Is there the I2S signal input at pins (77), (78) of IC3301?
Is thre audio signal intput at pin(6) of IC1701?
Is the L-ch audio signal output at pin((28), (30) of IC1701 normal?
Is the R-ch audio signal output at pin(12), (14) of IC1701 normal?
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1701 normal?
Check speakers and their peripheral circuits.
No audio heard (1)
YES
YES
YES
YES
YES
NO Check TU1101 and its peripheral circuits.
NO Check IC3301 and its peripheral circuits.
NO Check connection between IC3301 and IC1701 and its
peripheral circuits.
NO Check IC1701 and its peripheral circuits.
NO Check circuit between IC1701 & P1701.
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