Sharp LC-70LE835E/RU, Руководство по обслуживанию

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LC-70LE835E/RU, 836E/S, 838E
6 – 2
The sound is not emitted from the Speaker
No sound output in all modes?
YES
Do audio signals output from pins [Y30/CPU_AOLRCK, Y31/
CPU_AOBCK, V27/CPU_AOSDATA0] of IC3303 (Digital AV
decode & Main CPU)? NO Check IC3303 and its peripheral circuits.
YES
Do audio signals input to pins [7, 8, 9] of IC2701 (DSP)? NO Check the line between IC3303 and IC2701.
YES
Do audio signals output from pins [43/AMP_BCLK, 44/
AMP_LRCLK, 45/AMP_DATA_LR, 47/AMP_MCLK] of IC2701? NO Check IC2701 and its peripheral circuits.
YES
Do audio signals input to pins [5, 6, 7, 8] of IC2703 (SP_AMP)? NO Check the line between IC2701 and IC2703.
YES
Do audio signals output from pins [28/OUTML, 30/OUTPL, 12/
OUTPR, 14/OUTMR] of IC2703? NO Check IC2703 and its peripheral circuits.
YES
Is AMP_MUTE [pin (21)] of IC2703 at “H”? NO Check the line between IC2703 and IC3303 & IC2001 (UCOM).
(Q2701,D2701 etc...)
YES
Do audio signals input to pins [1&2/L-ch, 3&4/R-ch] of P2701? NO P2701 terminal and the peripheral circuit (L/C filter) are checked.
YES
Check Speaker (right and left) and wire harness.