Sharp Aquos LC 37D64U, Руководство по обслуживанию

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LC-32/37D64U
6 – 10
No audio (3)
No audio at UHF/VHF broadcast signal reception No audio at digital broadcast signal reception
Is TV selected on the input select menu screen? Is TV selected on the input select menu screen?
YES
NO
YES
NO
Is the audio output selected for “VARIABLE” on the menu
screen? Is the audio output selected for “VARIABLE” on the menu
screen?
Set the audio output to “FIXED”. Set the audio output to “FIXED”.
Is there the SIF signal output at pin(15) of tuner(TU1101) on the TER-
MINAL unit? Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and
(20) of tuner(TU1101) on the TERMINAL unit?
YES
NO
YES
NO
Check the tuner(TU1101) and its peripheral circuits. Check the tuner(TU1101) and its peripheral circuits.
Does the SIF signal come from pin(15) of tuner(TU1101) to pin(14) of
connector(SC501)? Are there the video signal outputs at pins(5) and (7) of connec-
tor(SC501) on the TERMINAL unit?
YES
NO
YES
NO
Check the line between TU1101 and SC501, and their
peripheral circuits.(Q1101, Q1102, etc.) Check the line between TU1101 and SC501.
Is there the SIF signal input at pin(14) of connector(SC2203) on the
MAIN unit? Are there the video signal inputs at pins(5) and (7) of connec-
tor(SC2203) on the MAIN unit?
YES
NO
YES
NO
Check the line between SC501 and SC2203. Check the line between SC2203 and SC501 connectors.
Does the SIF signal come from pin(14) of SC2203 to pin(AN23) of
IC8001(CPU) on the MAIN unit? Are there the video signal inputs at pin(AM33) and (AM34) of
IC8001(CPU)?
YES
NO
YES
NO
Check the line between IC8001 and SC2203. Check the line between IC8001 and SC2203.(L2204,
C2229, etc.)
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)?
YES
NO
Check the line between IC1403 and IC8001.
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)?
NO
Check the line between IC8001 and IC1402.
YES
Does the audio signal come from pins(19)(DSP_SDOUT1) and
(21)(DSP_SDOUT3) of IC1402 to pins(11) and (12) of IC1403(CODEC)? NO Check the line between IC1402 and IC1403.
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?
NO
Check the line between IC8001 and IC1403.
YES
Does the audio signal come from pins(17)(SPOUT_LP) and
(18)(SPOUT_RP) of IC1403 to pins(39)(SP_LP) and (43)(SP_RP) of con-
nector(SC2203) on the MAIN unit?
NO
Check the line between SC2203 and IC1403.(D1305,
D1312, Q1306 and Q1307, etc.)
YES
Are there the audio signal inputs at pins(39)(SP_LP) and (43)(SP_RP) of
connector(SC501) on the TERMINAL unit? NO Check the line between SC501 and SC2203.
YES
Does the audio signal come from pins(39)(SP_LP) and (43)(SP_RP) of
SC501 to pins(5)(SP_LP) and (9)(SP_RP) of IC2701(AMP) on the TER-
MINAL unit?
NO
Check the line between SC501 and IC2701, and their
peripheral circuits.(AMP_MUTE line, etc.)
YES
Is the audio output from IC2701 as specified? NO Check IC2701 and its peripheral circuits.
YES
Check the connector(P2701), speakers and their peripheral circuits.