Sharp LC-22DC30M Service Manual page 30

LC-22DC30M
No HDMI sound heard. <INPUT 1>
(*INPUT 1 is digital audio.)
Does the HDMI image appear onscreen?
No audio output from <INPUT 1>
Are waveforms input in to the pins of IC3301 normally?
Is there audio signal input 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 (3)
YES
YES
YES
YES
YES
YES
NO Refer to "<INPUT 1> in No external input video onscreen
(HDMI)".
NO Check the EDID.
NO Check peripheral circuits IC3301.
NO Check connection between IC3301 and IC1701 and its periph-
eral circuits.
NO Check IC1701 and its peripheral circuits.
NO Check circuit between IC1701 & P1701.
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