Sharp LC-65D64U Service Manual page 46

LC65D64U
INPUT-4 No audio (HDMI connected)
INPUT-5 No audio (HDMI connected)
INPUT-6 No audio (HDMI connected)
[INPUT-4 input]
Is INPUT-4 selected on the input select menu screen?
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
[INPUT-6 input]
Is INPUT-6 selected on the input select menu screen?
[INPUT-4 input] If no video appears, refer to "No external input video (HDMI) [INPUT-4]".
[INPUT-5 input] If no video appears, refer to "No external input video (HDMI) [INPUT-5]".
[INPUT-6 input] If no video appears, refer to "No external input video (HDMI) [INPUT-6]".
Is the HDMI_MUTE line as specified?
Does the audio signal come from pins (4) (COD_LRCK), (5) (COD_BCK) and (6)
(COD_SDOUT) of IC1403 to pins (AK24), (AH24) and (AJ24) of IC8001 (CPU)?
Does the audio signal come from pins (AJ25) (DSP_LRCK), (AK25) (DSP_BCKIN),
(AL25) (DSP_SDIN1) and (L32) (DSP_SDIN2) of IC8001 to pins (2), (3), (6) and (4) of
IC1402 (SOUND_DSP)?
Does the audio signal come from pins (19) (DSP_SDOUT1) and (21) (DSP_SDOUT3) of
IC1402 to pins (11) and (12) of IC1403 (CODEC)?
Does the audio signal come from pins (AJ25) (DSP_LRCK), (AK25) (DSP_BCKIN) and
(AL24) (DSP_MCLK) of IC8001 to pins (8), (9) and (10) of IC1403?
Does the audio signal come from pins (17) (SPOUT_LP) and (18) (SPOUT_RP) of
IC1403 to pins (21) (SP_LP) and (25) (SP_RP) of connector (SC2203) on the MAIN
unit?
Are there the audio signal inputs at pins (21) (SP_LP) and (25) (SP_RP) of connector
(SC501) on the TERMINAL unit?
Does the audio signal come from pins (21) (SP_LP) and (25) (SP_RP) of SC501 to pins
(5) (SP_LP) and (9) (SP_RP) of IC2701 (AMP) on the TERMINAL unit?
Is the audio output from IC2701 as specified?
Check the connector (P2701), speakers and their peripheral circuits.
No audio (4)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
4 – 13
Is the audio output selected for "VARIABLE"
on the menu screen?
NO
Set the audio output to "FIXED".
NO Check Q1301, IC1302 and their peripheral
circuits.
NO Check the line between IC1403 and IC8001.
Check the line between IC8001 and IC1402.
NO
NO Check the line between IC1402 and IC1403.
NO Check the line between IC8001 and IC1403.
Check the line between SC2203 and IC1403
NO
(D1305, D1312, Q1306 and Q1307, etc.).
NO Check the line between SC501 and SC2203.
Check the line between SC501 and IC2701,
NO
and their peripheral circuits (AMP_MUTE line,
etc.).
NO Check IC2701 and its peripheral circuits.