LC-52/60/70LE640U,C6400U (1st Edition)
6 – 15
• 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 (AL30) (L) and (AL32) (R) of IC3303
(CPU)?
Does the audio signal come from pins (3)
(L) and (2) (R) of input terminal (J510) to
pins (AL27) (L) and (AK28) (R) of IC3303
(CPU)?
Does the audio signal come from pins (13)
(L) and (12) (R) of input terminal (J510) to
pins (AK27) (L) and (AK29) (R) of IC3303
(CPU)?
YES
NO
YES
NO
YES
NO
Check the line between J510
and IC3303.
Check the line between J510
and IC3303.
Check the line between J510
and IC3303.
Does the digital audio signal come from pins (Y32/Y31/Y30/V27) (CPU_AOMCLK/AOBCK/AOLRCK/AOSDATA0) of IC3303 (CPU) to pins (5/7/8/6)
(AMP_MCLK/BCLK/LRCLK/DATA_LR) of IC2703 (AMP for L/R)?
YES
NO
Check the line between IC3303 and IC2703 and their peripheral circuits.
Is the audio output from IC2703 as specified? NO Check IC2703 and their peripheral circuits.
YES
Check the connector (P2701) L/R speakers and their
peripheral circuits.
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General
Weight and Dimensions
