Sharp LC-32M400M-BK Service Manual page 33

No HDMI sound heard. <INPUT 1>, <INPUT 2>, <INPUT 3>
(*INPUT 1 is digital audio.)
Does the HDMI image appear onscreen?
No audio output from <INPUT 1>, <INPUT 2>, <INPUT 3>.
Are waveforms input in to the pins of IC3301 normally and I2S out-
put from the pins (255), (256) normally?
Is there L-ch audio signal input at pin(3) of IC2701?
Is there R-ch audio signal input at pin(7) of IC2701?
Is the L-ch audio signal output at pin(27), (28), (29), (30) and (31)
of IC2701 normal?
Is the R-ch audio signal output at pin(11), (12), (13), (14) and (15)
of IC2701 normal?
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P2701 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 between IC3301 and IC1551.
NO Check connection between IC3301 and IC2701 and its periph-
eral circuits.
NO Check IC2701 and its peripheral circuits.
NO Check circuit between IC2701 & P2701.
6 – 7
LC-32M400M-BK/WH/RD