Sharp LC-60LE600U Service Manual page 42

LC-60/70LE600U
No HDMI1/2/3 audio
If no video appears, refer to "No external input video (HDMI)
[HDMI1/2/3]".
Is there the SPDIF signal output (OPT_OUT) at terminal on IC3301 side of
R3345?
YES
Is there the SPDIF signal input at pin (1) of D516 (OPTICAL OUTPUT)?
YES
Check the speakers and the optical cable.
Is the audio output from the monitor set at "VARIABLE" or
"FIXED" on the menu screen?
Are there the analog audio signal outputs at the terminals on
IC3301 side of R3332 (L) and R3333 (R)?
Does the audio signal come from R3332 (L) and R3333 (R) to
pins (5) (L) and (4) (R) of IC2703 (monitor audio output AMP)?
Does the audio signal come from pins (7) (L) and (1) (R) of
IC2703 to pins (2) (L) and (4) (R) of J507?
Check the connector (J507) and their peripheral circuits, and
speakers and the Cable.
No audio signal at Digital Audio Output terminal (Analog sound heard)
No monitor audio output
YES
YES
YES
YES
No audio at digital broadcast signal reception
If no video appears, refer to "No video at digital broadcast signal reception".
NO Check the IC3301 and its peripheral circuits.
NO Check the line between D516 and IC3301.
No optical output under the following conditions
as per HDMI requirements.
* Audio contents protected.
* Audio frequency beyond 48kHz.
* Audio bit length beyond 16bits.
NO Check the IC3301 and its peripheral circuits.
NO Check the IC3301 and its peripheral circuits.
NO Check IC3301 and each signals lines/its peripheral circuits.
NO Check the line between IC2703 and J507 and there peripheral
circuits.
Check the L_MUTE line and its peripheral circuits.
(Q2702/Q2701, etc.)
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