Sharp LC-46LE925E Service Manual page 57

Is the audio signal output to pins (1) of sound output terminal
(D520)?
Is SPDIF_MUTE signal SPDIF_MUTE [H29/IC3302] or
MUTE_A_ALL [21pin of IC2002 (UCOM)] at "H"?
Is an audio signal input to pin (2) of IC503 from [J28/
SPDIF_OUT] of IC3302 and is the logic signal input into pin (1) of
IC503?
Check IC3302 and its peripheral circuits.
Is the audio signal output to pin (14) of SC1503 (HDMI1 termi-
nal)?
Is the audio signal output to pin (39) of IC1504?
Check IC1504 and peripheral circuits.
No sound from external output device (3)
No sound from DIGITAL AUDIO OUTPUT terminal.
NO
NO
NO
No sound from external output device (4)
Does not the sound of the audio signal output to HDMI1 go out?
NO
NO
YES Check D520 and peripheral circuits.
YES Check the peripheral circuits of IC3302 and SPDIF_MUTE.
(Q505, D530, etc.)
YES Check the IC503 and peripheral circuits.
YES Check SC1503 and peripheral circuits.
YES Check the line between SC1503 and IC1504.
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LC-46/60LE925E