Sharp LC-46D64U Service Manual page 50

LC-42D64U/46D64U/52D64U
[HDMI analog audio input] INPUT-6 No audio
Is INPUT-6 selected on the input select menu screen?
Is the audio output selected for "VARIABLE" on the
menu screen?
Set the audio output to "FIXED".
Is the HDMI audio output selected for "Digital" on the
menu screen?
Set the HDMI audio output to "Analog".
YES
Does the audio signal come from pins (4) (L) and (2) (R) of input termi-
nal (J1601) to pins (43) (L) and (44) (R) of IC1403 (CODEC) on the
MAIN unit?
Check the line between J1601 and IC1403, and their
peripheral circuits.
YES
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) (SP_LP) and (18) (SP_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 con-
nector (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 (2)
NO
NO
YES
YES
YES
YES
YES
YES
YES
4 – 10
[PC analog audio input] INPUT-7 No audio
Is INPUT-7 selected on the input select menu screen?
Is the audio output selected for "VARIABLE" on the
menu screen?
Set the audio output to "FIXED".
YES
Does the audio signal come from pins (2) (L) and (3) (R) of input
terminal (J2201) to pins (46) (L) and (47) (R) of IC1403 (CODEC)
on the MAIN unit?
Check the line between J2201 and IC1403, and their
peripheral circuits.
YES
Check the line between IC1403 and IC8001.
Check the line between IC8001 and IC1402.
NO
NO Check the line between IC1402 and IC1403.
Check the line between IC8001 and IC1403.
NO
Check the line between SC2203 and IC1403 (Q1313,
NO
Q1314, etc.).
NO Check the line between SC501 and SC2203.
Check the line between SC501 and IC2701, and their
NO
peripheral circuits (AMP_MUTE line, etc.).
NO Check IC2701 and its peripheral circuits.
NO
NO
NO