Sharp LC-40LE831E (serv.man17) Service Manual ▷ View online
LC-40/46LE830E, RU/831E, S
6 – 5
No sound (during the reception of TV (DIGITAL-Satellite) broadcasting)
(DIGITAL-Satellite is only function for LE830 series)
Does not the sound go out though the picture has come out when DTV is received?
Do TS signals output to pins [44/TS_TUOUT_CLK, 46/
TS_TUOUT_SYNC, 45/TS_TUOUT_VAL, 43~36/
TS_TUOUT_D0~7] of TUNER(TU1102)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Do TS signals input to pins [45/S2_TS_CLK, 46/S2_TS_SYNC,
47/S2_TS_VAL, 48,51~57/S2_TS_DATA0~7] of IC4402 (CI Cont
& DTB-T/C Demod)?
47/S2_TS_VAL, 48,51~57/S2_TS_DATA0~7] of IC4402 (CI Cont
& DTB-T/C Demod)?
NO
Check the line between TU1102 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?
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)?
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 & Woofer though the picture has come out.”
No sound from external input devices (1)
Does not the sound of the audio signal input to EXT1 go out?
Do audio signals input to pins [2/AUDIO_IN_R, 6/AUDIO_IN_L]
of EXT1 (SC505)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
YES
Do audio signals input to pins [AM32/SC1_AINR0, AM30/
SC1_AINL0] of IC3303 (Digital AV decode & Main CPU) from
SC505?
SC1_AINL0] of IC3303 (Digital AV decode & Main CPU) from
SC505?
NO
Check the line between SC505 and IC3303.
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
LC-40/46LE830E, RU/831E, S
6 – 6
No sound from external input devices (2)
Does not the sound of the audio signal input to EXT2 go out?
• Do audio signals input to pins[2/CVBS1_IN_R, 3/
CVBS1_IN_L] of EXT2 (J511)?
• Is CVBS_PLUG [4/CVBS1_PLUG] of J511 at “L”
NO
Check the setting of an external input device that connects with
EXT2.
EXT2.
YES
Do audio signals input to pins [AL32/CVBS1_AINR2, AL30/
CVBS1_AINL2] of IC3303 (Digital AV decode & Main CPU)?
CVBS1_AINL2] of IC3303 (Digital AV decode & Main CPU)?
NO
Check IC3303 and its peripheral circuits.
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
No sound from external input devices (3)
Does not the sound of the audio signal input to EXT3 go out?
Do audio signals input to pins [7/COMP1_IN_R, 8/COMP1_IN_L]
of EXT3 (J511)?
NO
Check the setting of an external input device that connects with
EXT3.
EXT3.
YES
Do audio signals input to pins [AK29/COMP1_AINR1, AK27/
IFCOMP1_AINL1] of IC3303 (Digital AV decode & Main CPU)?
IFCOMP1_AINL1] of IC3303 (Digital AV decode & Main CPU)?
NO
Check IC3303 and its peripheral circuits.
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
No sound from external input devices (4)
Does not the sound of the audio signal input to HDMI-2
mode go out?
mode go out?
Does not the sound of the audio signal input to PC/Compo-
nent mode go out?
nent mode go out?
Check whether it is selected “HDMI + Analog” by the Audio select
under Menu-Setup-Option-Terminal setting-Audio select.
under Menu-Setup-Option-Terminal setting-Audio select.
Check whether it is selected “Video + Audio” by the Audio select
under Menu-Setup-Option-Terminal setting-Audio select.
under Menu-Setup-Option-Terminal setting-Audio select.
YES
YES
Do audio signals input to pins [2/PC/HDMI_L, 3/PC/HDMI_R] of J501 (PC AUDIO_IN)?
YES
NO
Check the setting of an external input device that connects with
J501.
J501.
Do audio signals input to pins [AM27/PC_HDMI_AINL4, AJ27/
PC_HDMI_AINR4] of IC3303 (Digital AV decode & Main CPU)?
PC_HDMI_AINR4] of IC3303 (Digital AV decode & Main CPU)?
NO
Check the line between J501 and IC3303.
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
LC-40/46LE830E, RU/831E, S
6 – 7
No sound from external input devices (5)
Does not the sound of the audio signal input to HDMI1/2/3/4 go out?
Please Refer to “[External input HDMI-1/2/3/4] No picture on the display (11)”.
No sound from external output device (1)
No audio signal output to EXT1 terminal.
Do audio signals output from pins [1/AUDIO_OUT_R, 3/
AUDIO_OUT_L] of EXT1 (SC505)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
NO
Is AUDIO_MUTE(MUTE_A_ALL) [23 pin] of IC2001 (UCOM) at
“H”?
“H”?
YES
Check the peripheral circuits of IC2001 and AUDIO_MUTE.
(Q502 etc...)
(Q502 etc...)
NO
Do audio signals output from pins [1/TUNER_R_OUT, 7/
TUNER_L_OUT] of IC2706 (Buffer AMP)?
TUNER_L_OUT] of IC2706 (Buffer AMP)?
YES
Check the line between IC2706 and SC505.
NO
Do audio signals input to pins [2, 6] of IC2706?
YES
Check IC2706 and its peripheral circuits.
NO
Do audio signals (TUNER_OUTR/L) output from pins [AG31/
TUNER_OUT_R, AG32/TUNER_OUT_L] of IC3303 (Digital AV
decode & Main CPU)?
TUNER_OUT_R, AG32/TUNER_OUT_L] of IC3303 (Digital AV
decode & Main CPU)?
YES
Check between IC3303 and IC2706.
NO
Check IC3303 and its peripheral circuits.
LC-40/46LE830E, RU/831E, S
6 – 8
No sound from external output device (2)
No sound from HEAD PHONE_OUTPUT/ AUDIO_OUTPUT terminal.
Does not the sound of the audio signal output to Headphone
mode go out?
mode go out?
Does not the sound of the audio signal output to Audio out
mode go out?
mode go out?
Check whether it is selected “Headphone” by Headphone/Audio
out select under Menu-Setup-Option-Terminal setting-Head-
phone/Audio out select.
out select under Menu-Setup-Option-Terminal setting-Head-
phone/Audio out select.
Check whether it is selected “Audio out” by Headphone/Audio out
select under Menu-Setup-Option-Terminal setting-Headphone/
Audio out select.
select under Menu-Setup-Option-Terminal setting-Headphone/
Audio out select.
Do audio signals output from pins [2/MONI_HP_R, 3/MONI_HP_L] of J504 (HP Jack/AUDIO OUT)?
Is HP_PLUG [1 pin] of J504 at “H”?
Is HP_PLUG [1 pin] of J504 at “H”?
NO
NO
Check the setting of an external input device that connects with
J504.
And check the line between J504 and IC3303 (Digital AV decode
& Main CPU).
J504.
And check the line between J504 and IC3303 (Digital AV decode
& Main CPU).
Is HPOUT_MUTE at “H”?
Is HP_MUTE [AH12] of IC3303 at “H”?
Is AUDIO_MUTE (MUTE_A_ALL) [23 pin] of IC2001 (UCOM) at
“H”?
Is HP_MUTE [AH12] of IC3303 at “H”?
Is AUDIO_MUTE (MUTE_A_ALL) [23 pin] of IC2001 (UCOM) at
“H”?
YES
Check the line between J504 and HPOUT_MUTE.
(Q506, D2711, IC3303 & IC2001 etc...)
(Q506, D2711, IC3303 & IC2001 etc...)
NO
Do audio signals output from pins [2/MONI_HP_L, 11/
MONI_HP_R] of IC2704 (HP-AMP)?
MONI_HP_R] of IC2704 (HP-AMP)?
YES
Check the line between IC2704 and J504.
NO
Do audio signals input to pins [1, 12] of IC2704?
YES
Check IC2704 and its peripheral circuits.
NO
Do audio signals (HP_MONITOR_L/R) output from pins [AJ31/
HP_MON_L, AJ32/HP_MON_R] of IC3303?
HP_MON_L, AJ32/HP_MON_R] of IC3303?
YES
Check the line between IC3303 and IC2704.
NO
Check IC3303 and its peripheral circuits.
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