Sharp AQUOS LC-52LE640U, Руководство по обслуживанию

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LC-52/60/70LE640U/C6400U,LC-80LE633U/844U (1st Edition)
6 – 36
•
Does not sound.
No audio (1)
INPUT-6 No audio. INPUT-7 No audio. INPUT-5 No audio.
Is INPUT-6 selected on the input select
menu screen? Is INPUT-7 selected on the input select
menu screen? Is INPUT-5 selected on the input select
menu screen?
YES
NO
YES
NO
YES
NO
Refer to “: No external input
video [INPUT-6]”. Refer to “: No external input
video [INPUT-7]”. Refer to “: No external input
video [INPUT-5]”.
Is the audio output selected for “VARI-
ABLE” on the menu screen? Is the audio output selected for “VARI-
ABLE” on the menu screen? Is the audio output selected for “VARI-
ABLE” on the menu screen?
YES
NO
YES
NO
YES
NO
Set the audio output to
“FIXED”. Set the audio output to
“FIXED”. Set the audio output to
“FIXED”.
Does the audio signal come from pins (8)
(L) and (7) (R) of input terminal (J510) to
pins (AP34) (L) and (AU36) (R) of IC3301
(CPU)? Does the audio signal come from pins (3)
(L) and (2) (R) of input terminal (J510) to
pins (AR37) (L) and (AT36) (R) of IC3301
(CPU)? Does the audio signal come from pins (13)
(L) and (12) (R) of input terminal (J510) to
pins (AT37) (L) and (AT35) (R) of IC3301
(CPU)?
YES
NO
YES
NO
YES
NO
Check the line between J510
and IC3301. Check the line between J510
and IC3301. Check the line between J510
and IC3301.
Does the digital audio signal come from pins(AR11/AP11/AN9)(CPU_AOBCK/AOLRCK/AOSDATA0) of IC3301(CPU) to pins(6/7/5)(SP_BCLK/
SP_LRCLK/SP_DATA) of IC1703(Audio DSP)?
YES
NO
Check the line between IC3301 and IC1703, and their paripheral circuits.
• About the L/R Speakers.
Does the digital audio signal come from pins (30/21/26/27) of IC1703 (Audio DSP) to pin (5/7/8/6) of IC1902 (AMP for L/R)?
• About the Subwoofer speaker.
Does the digital audio signal come from pins (30/21/26/28) of IC1703 (Audio DSP) to pin (5/7/8/6) of IC1901 (AMP for SW)?
YES
NO
Check IC2701 and its paripheral circuits.(X2701, etc.)
• About the L/R Speakers.
Is the audio output from IC1902 as specified?
• About the Subwoofer Speaker.
Is the audio output from IC1901 as specified?
YES
NO
• About the L/R Speakers.
Check IC1902 and its peripheral circuits.
• About the Subwoofer Speaker.
Check IC1901 and its peripheral circuits.
• About the L/R Speakers.
Check the connector (P1903) L/R speakers and their peripheral circuits.
• About the Subwoofer Speaker.
Check the connector (P1904), subwoofer speaker and their peripheral circuits.