LC-22DC30M
6 – 7
No audio heard (4)
No sound from the HDMI sound input terminal.
(INPUT 1 analog audio)
YES
Is there the L-ch audio signal input from pin (2) of external input
terminal J506 (HDMI AUDIO IN) to pin (55) of IC3301?
Is there the R-ch audio signal input from pin (3) of external input
terminal J506 (HDMI AUDIO IN) to pin (56) of IC3301?
YES
Are I2S signal output from the pins (80), (81) of IC3301 normally?
NO
Check peripheral circuits of IC3301.
YES
Is there audio signal input at pin(6) of IC1701?
NO
Check connection between IC3301 and IC1701 and its periph-
eral 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.
