Sharp LC-52LE700E (serv.man8) Service Manual ▷ View online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 9
The audio signal is not output (1)
No audio signal output from EXT1/EXT2 terminal.
Is there a audio input signal in pins (3/TUNER_OUT_L) and (1/
TUNER_OUT_R) of EXT1 (SC503)?
TUNER_OUT_R) of EXT1 (SC503)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is there a audio input signal in pins (3/MONITOR_L) and (2/
MONITOR_R) of EXT2 (SC502)?
MONITOR_R) of EXT2 (SC502)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is (AF11/SC1-MUTE) of IC3302
(Digital AV decode & Main CPU) at H?
(Digital AV decode & Main CPU) at H?
YES
Check the peripheral circuits of IC3302 and SC1-MUTE.(Q502,
D529etc.)
D529etc.)
Is (AG11/SC2-MUTE) of IC3302
(Digital AV decode & Main CPU) at H?
(Digital AV decode & Main CPU) at H?
YES
Check the peripheral circuits of IC3302 and SC2-
MUTE.(Q501,D528etc.)
MUTE.(Q501,D528etc.)
NO
Is there a audio output signal in pins(N27/TUNER_OUT_L) and
(N28/TUNER_OUT_R) of IC3302 (Digital AV decode & Main
CPU)?
(N28/TUNER_OUT_R) of IC3302 (Digital AV decode & Main
CPU)?
YES
Check the line between IC3302 and SC503.
Is there a audio output signal in pins(M30/MONITOR_L) and
(M29/MONITOR_R) of IC3302 (Digital AV decode & Main CPU)?
(M29/MONITOR_R) of IC3302 (Digital AV decode & Main CPU)?
YES
Check the line between IC3302 and SC502.
NO
Check IC3302 and its peripheral circuits.
The audio signal is not output (2)
No audio signal output from AUDIO_OUTPUT terminal.
Is audio signal (L/R) output to pins (2, 4) of AUDIO_OUTPUT ter-
minal(J506)?
minal(J506)?
YES
Check the connection to AUDIO_OUTPUT terminal and external
input devices.
input devices.
NO
Is MONITOR_MUTE signal [AF13/MONI_MUTE] of IC3302 or
MUTE_A_ALL signal [21pin of IC2002(UCOM)] at "H"?
MUTE_A_ALL signal [21pin of IC2002(UCOM)] at "H"?
YES
Check the peripheral circuits of IC3302 and MUTE-
A_ALL_LINE.(D526, etc.)
A_ALL_LINE.(D526, etc.)
NO
Is audio signal (L/R) input to pins [M29/MONITOR_R] [M30/
MONITOR_L] of IC3302?
MONITOR_L] of IC3302?
YES
Check the line between IC3302 and J506.
(Q507,508,Q509,D526)
(Q507,508,Q509,D526)
NO
Check IC3302 and its peripheral circuits.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 10
The audio signal is not output (3)
No sound from HEADPHONE_OUTPUT terminal.
Is the HP_PLUG signal input to [H28/HP_PLUG] of IC3302 from
pin(6) of a HEADPHONE_OUTPUT terminal(J504)?
pin(6) of a HEADPHONE_OUTPUT terminal(J504)?
YES
Check the line between J504 and IC3302.
NO
Is the audio signal output (HP_L/R) to pins(2, 3) of HEADPHONE
terminal (J504)?
terminal (J504)?
YES
Check the HEADPHONE terminal(J504) and/or peripheral cir-
cuits.
cuits.
NO
Is HP-MUTE [AG13/HP_MUTE] of IC3302 at H?
YES
Check the peripheral circuits of IC3302(CPU) and HP-
MUTE_LINE.(D527,Q506, etc.)
MUTE_LINE.(D527,Q506, etc.)
NO
Is audio signal (HP_L/R) input to pins(M28/HP_L, M27/HP_R) of
IC3302?
IC3302?
YES
Check the line between IC3302 and J504.
NO
Check IC3302 and its peripheral circuits.
The audio signal is not output (4)
No sound from DIGITAL AUDIO OUTPUT terminal.
Is the audio signal output to pins(1) of sound output terminal
(D520)?
(D520)?
YES
Check D520 and/or peripheral circuits.
NO
Is SPDIF_MUTE signal [F7/SPDIF_MUTE] of IC3302
, MUTE-A_ALL signal [2pin of IC2002(UCON)] at H?
, MUTE-A_ALL signal [2pin of IC2002(UCON)] at H?
YES
Check IC3302, IC2002, its circumference circuit and
SPDIF_MUTE_LINE, MUTE-A_ALL_LINE.(Q505, D530, etc.)
SPDIF_MUTE_LINE, MUTE-A_ALL_LINE.(Q505, D530, etc.)
NO
Is an audio signal input to pin(3) of IC503, from [J28/OPT_OUT]
of IC3302 and is the logic signal input into pin (1) of IC503?
of IC3302 and is the logic signal input into pin (1) of IC503?
YES
Check the IC503 and/or peripheral circuits.
NO
Check IC3302 and its peripheral circuits.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 11
No picture on the display (1)
The picture doesn't appear in all modes.
YES
Is the LVDS signal output from IC3302(DIGITAL_AV_DECODER_&_MAIN_CPU_&_VIDEO PROCESSER) respectively?
TA1_P/M (AC25/AC26), TB1_P/M (AD25/AD26), TC1_P/M (AE25/AE26), TD1_P/M (AE24/AF24), TE1_P/M (AE23/AF23), TCLK1_P/M (AF25/
AF26), TA2_P/M (AE22/AF22), TB2_P/M (AE21/AF21), TC2_P/M (AE20/AF20), TD2_P/M (AE18/AF18), TE2_P/M (AE17/AF17), TCLK2_P/M
(AE19/AF19)
TA1_P/M (AC25/AC26), TB1_P/M (AD25/AD26), TC1_P/M (AE25/AE26), TD1_P/M (AE24/AF24), TE1_P/M (AE23/AF23), TCLK1_P/M (AF25/
AF26), TA2_P/M (AE22/AF22), TB2_P/M (AE21/AF21), TC2_P/M (AE20/AF20), TD2_P/M (AE18/AF18), TE2_P/M (AE17/AF17), TCLK2_P/M
(AE19/AF19)
YES
NO
Check IC3302 and its peripheral control circuits.
(IC2002, IC3501, IC3502, X3302, etc.)
(IC2002, IC3501, IC3502, X3302, etc.)
Is the above-mentioned LVDS signal output to connector P2601?
NO
Check the line between IC3302 and P2601.
YES
Similarly, is LCD controller's control signal normal?
NO
Please check each control signal of L/R, U/D, HV_MODE,
ROMSEL_0/1, TEMP3/2/1, OS_EN, SHIP_EN, and PE.
ROMSEL_0/1, TEMP3/2/1, OS_EN, SHIP_EN, and PE.
YES
PANEL_UNIT:
Is the LVDS signal input to connector LW of the panel module?
Is the LVDS signal input to connector LW of the panel module?
NO
NO Wire harness (LW) is checked.
YES
Check the panel module.
No picture on the display (2)
Does not the picture come out when VHF/UHF is received?
Is the video signal (TUNER_CVBS) output from pin (6) of
TUNER(TU1101)?
TUNER(TU1101)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is the video signal (TUNER_CVBS) sent to pin (AD29/
TU_CVBS) of IC3302
(Digital AV decode & Main CPU)?
TU_CVBS) of IC3302
(Digital AV decode & Main CPU)?
NO
Check the line between TU1101 and IC3302.
(Q1106, etc.)
(Q1106, etc.)
YES
Refer to “The picture doesn't appear in all modes.”
No picture on the display (3)
Does not the picture come out when DTV is received?
Is IF signal output from pins(16, 17) of TU1101?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is IF signal sent to p(AA29/D__IF_P, AB29/D__IF_N) of
IC3302(Digital AV decode & Main CPU)?
IC3302(Digital AV decode & Main CPU)?
NO
Check the line between TU1101 and IC3302.
YES
Refer to “No sound output in all modes”
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 12
[External input EXT1,EXT2] No picture on the display (4)
Does not the picture of the CVBS signal input to EXT1 go out?
Does not the picture of the CVBS signal input to EXT2 go out?
Does not the picture of the CVBS signal input to EXT2 go out?
Is CVBS signal sent to pin(20) of EXT1 (SC503)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is CVBS signal sent to pin(20) of EXT2 (SC502)?
NO
Check the setting of an external input device that connects with
EXT2.
EXT2.
YES
Is CVBS signal from EXT1(SC503) sent to pin(AG29/
SC1_CVBS_Y) of IC3302
(Digital AV decode & Main CPU)
SC1_CVBS_Y) of IC3302
(Digital AV decode & Main CPU)
NO
Check the line between SC503 and IC3302.
Is CVBS signal from EXT2(SC502) sent to pin(AH30/
SC2_CVBS_Y) of IC3302
(Digital AV decode & Main CPU)?
SC2_CVBS_Y) of IC3302
(Digital AV decode & Main CPU)?
NO
Check the line between SC502 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT1,EXT2] No picture on the display (5)
Does not the picture of the Y/C video signal input to EXT1 go out?
Does not the picture of the Y/C video signal input to EXT2 go out?
Does not the picture of the Y/C video signal input to EXT2 go out?
Is Y/C video signal sent to pins(20)/Y and (15)/C of
EXT1(SC503)?
EXT1(SC503)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is Y/C video signal sent to pins(20)/Y and (15)/C of
EXT2(SC502)?
EXT2(SC502)?
NO
Check the setting of an external input device that connects with
EXT2.
EXT2.
YES
Is Y/C signal from EXT1(SC503) sent to pins (AG29/
SC1_CVBS_Y) and (AG28/SC1_C1) of IC3302
(Digital AV decode & Main CPU)
SC1_CVBS_Y) and (AG28/SC1_C1) of IC3302
(Digital AV decode & Main CPU)
NO
Check the line between SC503 and IC3302.
Is Y/C signal from EXT1(SC503) sent to pins (AH30/
SC2_CVBS_Y) and (AH29/SC2_C2) of IC3302
(Digital AV decode & Main CPU)
SC2_CVBS_Y) and (AH29/SC2_C2) of IC3302
(Digital AV decode & Main CPU)
NO
Check the line between SC502 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT1] No picture on the display (6)
Does not the picture of the R/G/B signal input to EXT1 go out?
Is RGB1 signal sent to pins (15)/R1, (11)/G1 and (7)/B1 of
EXT1(SC503)?
EXT1(SC503)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
YES
Is RGB1 signal from EXT1(SC503) sent to pins (AH22/RED1),
(AJ22/GREEN_1) and (AJ21/BLUE_1) of IC3302
(Digital AV decode & Main CPU)
(AJ22/GREEN_1) and (AJ21/BLUE_1) of IC3302
(Digital AV decode & Main CPU)
NO
Check the line between SC503 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
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