Sharp 52LE920UN INoINPUT-4151617IHDMIaudio, No audio at dilital broadcast silnal reception

LC-52LE920UN/LC-60LE920UN

I No audio si_lnal at Di_lital Audio Output terminal IAnalo_l sound heard I I

INoINPUT-4151617IHDMI)audio. I

I No audio at di_lital broadcast si_lnal reception. I

If no video appears, refer to "No external input video (HDMI) [IN PUT-4/5/6/7]".

If no video appears, refer to "No video at digital broadcast signal reception".

I Is there the SPDIF signal output (OPT_OUT) at pin (J28) of IC3302 (CPU)?

_' NO

I Check the IC3302 and its peripheral circuits.

YES
I Is there the SPDIF signal (OPT_OUT) input at pin (2) of IC503 (SPDIF BUFFER & SPDIF-MUTE)?	I

_' NO

I Check the line between IC3302 and IC503.

YES
I Is there the MUTE signal input at pin (7) of IC503? (usual: High, Mute: Low)	I

_' NO

Check the MUTE A ALL and SPDIF-MUTE signals, and their peripheral cir- cuits (Q505, D530, etc.).

YES
I Is there the SPDIF signal input at pin (1) of D520 (OPTICAL OUTPUT)?	I

_' YES

[ Check the speakers and the optical cable. I

_' NO

Check D520 and its peripheral circuits.

No optical output under the following conditions as per HDMI requirements.

*Audio contents protected.

*Audio frequency beyond 48kHz.

*Audio bit length beyond 16bits.

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