Sharp LC-32LE280X, Руководство по обслуживанию

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LC-32LE280X/LC-40LE280X
4 – 5
No audio heard (2)
No external audio heard
Is there the L-ch audio signal input from pin (4) of input terminal
J502 to pin (124 ) of IC3301?
Is there the R-ch audio signal input from pin (6) of input terminal
J502 to pin (123 ) of IC3301?
YES
Is there the I2S signal output at pin ( 72,159,160,161 ) of IC3301 ?
Check IC3301 and its peripheral circuits.
YES
O N ? 2 0 7 1 C I f o 5,6,7,8 ) ( n i p t a t u p n i l a n g i s e r e h t s I Check connection between IC3301 and IC1702 and its periph-
eral circuits.
YES
Is the L-ch audio signal output at pin(8), (13) of
IC1702 normal ? NO Check IC1702 and its peripheral circuits.
Is the R-ch audio signal output at pin(19), (23) of
IC1702 normal ?
YES
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1701 normal? NO Check circuit between IC1702 & P1701.
YES
Check speakers and their peripheral circuits.
< INPUT 3 >
NO