LC-32R24B
4 – 11
No audio signal at Digital Audio Output terminal (Analog sound heard)
No INPUT-4/5(HDMI) audio
If no video appears, refer to “No external input video (HDMI)
[INPUT-4/5]”.
Is the HDMI_MUTE line as specified?
YES
NO
Check Q1301, IC1302 and their peripheral circuits.
Is there the SPDIF signal (OPT_OUT) output at pin (AP11) of
IC8001 (CPU)?
YES
Is there the SPDIF signal (OPT_OUT) input at pin (2) of IC1304
(SPDIF_BUFF & MUTE)?
NO Check the line between IC8001 and IC1304.
YES
Is there the MUTE signal input at pin (1) of IC1304? NO Check the MUTE_A_ALL and ACDET signals, and their
peripheral circuits. (Q1304, Q1312, D1310, etc.)
YES
Is there the SPDIF signal input at pin (1) of D1306 (OPTICAL OUT-
PUT)?
NO Check D1306 and its peripheral circuits.
YES
No optical output under the following conditions as per
HDMI requirements.
*Audio contents protected.
*Audio frequency beyond 48kHz.
*Audio bit length beyond 16bits.
Check the speakers and their peripheral circuits.
Leandro Palmeira
eletronicagaucho@hotmail.com
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