Chapter 6. Troubleshooting Table Troubleshooting Table - Sharp LC-60LE830E Service Manual

LC60LE635E
CHAPTER 6.
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)?
YES
Do audio signals output from pins [28/OUTML, 30/OUTPL, 12/
OUTPR, 14/OUTMR] of IC2703?
YES
Is AMP_MUTE [pin (21)] of IC2703 at "H"?
YES
Do audio signals input to pins [1&2/L-ch, 3&4/R-ch] of P2701?
YES
Check Speaker (right and left) and wire harness.
YES
YES
YES
YES
LC-60LE635E(B),RU(B)/636E(B),S(B)/638E(B)
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.
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