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CHAPTER 6.
LC60LE635E
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
The sound is not emitted from the Speaker & Woofer though the picture has come out.
No sound output in all modes?
Do audio signals output from pins [Y30/CPU_AOLRCK, Y31/
CPU_AOBCK, V27/CPU_AOSDATA0] of IC3303 (Digital AV
decode & Main CPU)?
Do audio signals input to pins [7, 8, 9] of IC2701 (DSP)?
Do audio signals output from pins [43/AMP_BCLK, 44/
AMP_LRCLK, 45/AMP_DATA_LR, 46/AMP_DATA_SW, 47/
AMP_MCLK] of IC2701?
Do audio signals input to pins [5, 6, 7, 8] of IC2703
(SP_AMP)?
Do audio signals output from pins [28/OUTML, 30/
OUTPL, 12/OUTPR, 14/OUTMR] of IC2703?
Is AMP_MUTE [pin (21)] of IC2703 at "H"?
Do audio signals input to pins [1&2/L-ch, 3&4/R-ch] of
P2701?
Check Speaker (right and left) and wire harness.
YES
YES
YES
(A)
YES
YES
YES
YES
LC-60LE635E/636E/638E (1st Edition)
Service Manual
NO
Check IC3303 and its peripheral circuits.
NO
Check the line between IC3303 and IC2701.
NO
Check IC2701 and its peripheral circuits.
NO
Check the line between IC2701 and IC2703.
NO
Check IC2703 and its peripheral circuits.
NO
Check the line between IC2703 and IC3303 & IC2001 (UCOM).
(Q2701,D2701 etc...)
NO
P2701 terminal and the peripheral circuit (L/C filter) are checked.
6 – 1
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