Sharp LC-22DC30M

LC-22DC30M
6 – 6
No audio heard (3)
No HDMI sound heard. <INPUT 1>
(*INPUT 1 is digital audio.)
Does the HDMI image appear onscreen? NO Refer to “<INPUT 1> in No external input video onscreen
(HDMI)”.
YES
No audio output from <INPUT 1> NO Check the EDID.
YES
Are waveforms input in to the pins of IC3301 normally? NO Check peripheral circuits 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.