Sharp Aquos LC-60LE740E, Service Manual

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LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 46
No sound (during the reception of TV (DIGITAL) broadcasting)
Does not the sound go out though the picture has come out when DTV is received?
In the case of LE645,LE648 series, refer to (A).
In the case of LE646 series, refer to (B).
(B)
(A)
Do IF signals output to pins [10, 11] of TUNER
(TU1102)? NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Do IF signals input to pins [35/IFPGA_INN, 36/
IFPGA_INP] of IC4402 (CI Cont & DTB-T/C Demod)? NO Check the line between IC1102 and IC4402.
YES
Do TS signals output to pins [15/DEMOD_TS_DATA0,
16/DEMOD_TS_SYNC, 17/DEMOD_TS_VAL, 18/
DEMOD_TS_CLK] of IC4402? NO Check IC4402 and its peripheral circuits.
YES
Do TS signals input to pins [U30/DEMOD_TSDATA0,
V30/DEMOD_TSSYNC, V29/DEMOD_TSVAL, U32/
DEMOD_TSCLK] of IC3303 (Digital AV decode & Main
CPU)? NO Check the line between IC4402 and IC3303.
YES
Refer to “The sound is not emitted from the Speaker.”
Do TS signals output to pins [19/TS_TUOUT_CLK, 17/
TS_TUOUT_SYNC, 18/TS_TUOUT_VAL, 20~27/
TS_TUOUT_D0~7] of TUNER (TU1104)? NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Do TS signals input to pins [45/TS_TUOUT_CLK, 46/
TS_TUOUT_SYNC, 47/TS_TUOUT_VAL, 48, 51~57/
TS_TUOUT_D0~7] of IC4402 (CI Cont & DTB-T/C Demod)? NO Check the line between TU1104 and IC4402.
YES
Do TS signals output to pins [15/DEMOD_TS_DATA0, 16/
DEMOD_TS_SYNC, 17/DEMOD_TS_VAL, 18/
DEMOD_TS_CLK] of IC4402? NO Check IC4402 and its peripheral circuits.
YES
Do TS signals input to pins [U30/DEMOD_TSDATA0, V30/
DEMOD_TSSYNC, V29/DEMOD_TSVAL, U32/
DEMOD_TSCLK] of IC3303 (Digital AV decode & Main CPU)? NO Check the line between IC4402 and IC3303.
YES
Refer to “The sound is not emitted from the Speaker.”