LC-46/60LE925E
7 – 7
No sound from external output device (3)
No sound from DIGITAL AUDIO OUTPUT terminal.
Is the audio signal output to pins (1) of sound output terminal
(D520)?
YES Check D520 and peripheral circuits.
NO
Is SPDIF_MUTE signal SPDIF_MUTE [H29/IC3302] or
MUTE_A_ALL [21pin of IC2002 (UCOM)] at “H”?
YES Check the peripheral circuits of IC3302 and SPDIF_MUTE.
(Q505, D530, etc.)
NO
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?
YES Check the IC503 and peripheral circuits.
NO
Check IC3302 and its peripheral circuits.
No sound from external output device (4)
Does not the sound of the audio signal output to HDMI1 go out?
Is the audio signal output to pin (14) of SC1503 (HDMI1 termi-
nal)?
YES Check SC1503 and peripheral circuits.
NO
Is the audio signal output to pin (39) of IC1504? YES Check the line between SC1503 and IC1504.
NO
Check IC1504 and peripheral circuits.
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