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