Sharp LC-32LE700E (serv.man8) Service Manual ▷ View online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 13
[External input EXT3] No picture on the display (7)
Does not the picture of the component video signal input to EXT3 go out?
Is a COMPONENT video signal input to pins (3)/Y, (5)/Pb, (7)/Pr
of EXT3 (J503)?
of EXT3 (J503)?
NO
Check the setting of an external input device that connects with
EXT3.
EXT3.
YES
Is COMP_PLUG detection signal to (AF7/COMP_PLUG) of
IC3302 (Digital AV decode & Main CPU) input from pin(2) of
EXT3 (J503)?
IC3302 (Digital AV decode & Main CPU) input from pin(2) of
EXT3 (J503)?
NO
Check the line between IC3302 and J503.
YES
Is COMPONENT signal sent to pins (AJ18/COMP__Y), (AJ19/
COMP__Pb) and (AH19/COMP__Pr) of IC3302
COMP__Pb) and (AH19/COMP__Pr) of IC3302
NO
Check the line between IC3302 and J503.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT4] No picture on the display (8)
Does not the picture of the DVI (ANALOG) video signal input to EXT4 (15pin-D-SUB terminal) go out?
Are the video signal and the synchronized signal input from
pin(1, 2, 3)/(R, G, B), (14 and 13)/(V, H.Sync) of EXT4 (SC501)?
pin(1, 2, 3)/(R, G, B), (14 and 13)/(V, H.Sync) of EXT4 (SC501)?
NO
Check the connection and setup with the external DVI devices.
YES
Are the video signal and the synchronized signal input from pins
(AK17/PC__R) (AK16/PC__G)(AH15/PC__B) and (AK14/
PC_HSYNC) (AJ14/PC_VSYNC) of IC3302
(Digital AV decode & Main CPU)?
(AK17/PC__R) (AK16/PC__G)(AH15/PC__B) and (AK14/
PC_HSYNC) (AJ14/PC_VSYNC) of IC3302
(Digital AV decode & Main CPU)?
NO
Check the line between SC501 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT8] No picture on the display (9)
Does not the picture of the CVBS signal input to EXT8 go out?
Is a CVBS signal input to pin (6) of EXT8 (J505)?
NO
Check the setting of an external input device that connects with
EXT8.
EXT8.
YES
Is V3_PLUG detection signal input to pin (AJ1/CVBS_PLUG) of
IC3302 (Digital AV decode & Main CPU) from pin(7) of EXT8
(J505)?
IC3302 (Digital AV decode & Main CPU) from pin(7) of EXT8
(J505)?
NO
Check the line between J505 and IC3302.
YES
Is CVBS signal sent to pin (AE29/CVBS__IN) of IC3302?
NO
Check the line between J505 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 14
[External input HDMI-1/2/3] No picture on the display (10)
Does not the picture/sound of the HDMI signal input to HDMI-1/2/3 go out?
YES
Is the Hot plug detection function output from pin (19) of the
HDMI-1(SC1502) normal?
HDMI-1(SC1502) normal?
NO
Check the line between SC1502 and pin(31) of IC1504(HDMI-
SW).
SW).
Is the Hot plug detection function output from pin (19) of the
HDMI-2(SC1503) normal?
HDMI-2(SC1503) normal?
NO
Check the line between SC1503 and pin(35) of IC1504(HDMI-
SW).
SW).
Is the Hot plug detection function output from pin (19) of the
HDMI-3(SC1506) normal?
HDMI-3(SC1506) normal?
NO
Check the line between SC1506 and pin(41) of IC1504(HDMI-
SW).
SW).
Is the Hot plug detection function output from pin (19) of the
HDMI-4(SC1501) normal?
HDMI-4(SC1501) normal?
NO
Check the line between SC1501 and pin(41) of IC1504(HDMI-
SW).
SW).
YES
NO
Check the setting of an external input device that connects with
HDMI-1/2/3/4.
HDMI-1/2/3/4.
Is EDID data pins(40/HDMI3_SCL), (39/HDMI3_SDA) of IC1504
accessed, and is it read from pins(15, 16) of a HDMI-1(SC1502)?
accessed, and is it read from pins(15, 16) of a HDMI-1(SC1502)?
NO
Is access possible in the exchange of IC1504?
Is EDID data pins(44/HDMI1_SCL), (43/HDMI1_SDA) of IC1504
accessed, and is it read from pins(15, 16) of a HDMI-2(SC1503)?
accessed, and is it read from pins(15, 16) of a HDMI-2(SC1503)?
NO
Is EDID data pins(30/HDMI1_SCL), (29/HDMI1_SDA) of IC1504
accessed, and is it read from pins(15, 16) of a HDMI-3(SC1506)?
accessed, and is it read from pins(15, 16) of a HDMI-3(SC1506)?
Check the peripheral circuit of SC1502/1503/1506/1501and
IC1504.
IC1504.
Is EDID data pins(34/HDMI2_SCL), (33/HDMI2_SDA) of IC1504
accessed, and is it read from pins(15, 16) of a HDMI-4(SC1501)?
accessed, and is it read from pins(15, 16) of a HDMI-4(SC1501)?
YES
Is TMDS signal input into pins (12, 11/HDMI3_CLKP/N), (14, 13/
HDMI3_D0P/N), (16, 15/HDMI3_D1P/N), (18, 17/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1502)?
HDMI3_D0P/N), (16, 15/HDMI3_D1P/N), (18, 17/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1502)?
NO
Check the line between HDMI-1(SC1502) and IC1504.
Is TMDS signal input into pins (20, 19/HDMI2_CLKP/N), (22,21/
HDMI2_D0P/N), (24, 23/HDMI2_D1P/N), (26, 25/HDMI2_D2P/
N) of IC1504 from HDMI-1(SC1503)?
HDMI2_D0P/N), (24, 23/HDMI2_D1P/N), (26, 25/HDMI2_D2P/
N) of IC1504 from HDMI-1(SC1503)?
NO
Check the line between HDMI-2(SC1503) and IC1504.
Is TMDS signal input into pins (66, 65/HDMI1_CLKP/N), (68, 67/
HDMI1_D0P/N), (70, 69/HDMI1_D1P/N), (72, 71/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1506)?
HDMI1_D0P/N), (70, 69/HDMI1_D1P/N), (72, 71/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1506)?
NO
Check the line between HDMI-3(SC1506) and IC1504.
Is TMDS signal input into pins (2, 1/HDMI2_CLKP/N), (4, 3/
HDMI2_D0P/N), (6, 5/HDMI2_D1P/N), (8, 7/HDMI2_D2P/N) of
IC1504 from HDMI-1(SC1503)?
HDMI2_D0P/N), (6, 5/HDMI2_D1P/N), (8, 7/HDMI2_D2P/N) of
IC1504 from HDMI-1(SC1503)?
NO
Check the line between HDMI-4(SC1501) and IC1504.
YES
Are TMDS_Rx and the I2C_SINK signal output from IC1504
respectively?
Pins(62, 63/SW_TMDS_CLKP/N), (60, 61/SW_TMDS_D0P/N),
(58, 59/SW_TMDS_D1P), (56, 57/SW_TMDS_D2P)
respectively?
Pins(62, 63/SW_TMDS_CLKP/N), (60, 61/SW_TMDS_D0P/N),
(58, 59/SW_TMDS_D1P), (56, 57/SW_TMDS_D2P)
NO
Check the IC1504 and peripheral circuits.
YES
Is the TMDS_Rx/ I2C_SINK signal input to IC3302 (Digital AV
decode & Main CPU)?
Pins(AK6, AJ6/SW_TMDS_CLKP/N), (AK7, AJ7/
SW_TMDS_D0P/N), (AK8, AJ8/SW_TMDS_D1P), (AK9, AJ9/
SW_TMDS_D2P) from IC1504
decode & Main CPU)?
Pins(AK6, AJ6/SW_TMDS_CLKP/N), (AK7, AJ7/
SW_TMDS_D0P/N), (AK8, AJ8/SW_TMDS_D1P), (AK9, AJ9/
SW_TMDS_D2P) from IC1504
NO
Check the line between IC1504 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
or “No sound output in all modes”
or “No sound output in all modes”
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 15
<During external connection> No picture on the monitor (1)
No picture appears on EXT1/EXT2 connected monitor during the VHF/UHF reception.
Is CVBS signal output into pin (19) of EXT1 (SC503) from pin(67)
of IC504 (TUNER OUT)?
of IC504 (TUNER OUT)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is CVBS signal output into pin (19) of EXT2 (SC502) from pin(65)
of IC508 (MONITOR OUT)?
of IC508 (MONITOR OUT)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is CVBS signal input to pin (6) of IC504 from pin(2) of
IC507(MUX)?
IC507(MUX)?
YES
Check the IC504 and their peripheral circuits.
Is CVBS signal input to pin(1) of IC508 from pin(AJ24/
CVBS_MONI_OUT) of IC3302
(Digital AV decode & Main CPU)?
CVBS_MONI_OUT) of IC3302
(Digital AV decode & Main CPU)?
YES
Check the IC508 and their peripheral circuits.
NO
Is TUNER_CVBS signal input to pin (6) of IC507 from
TUNER(TU1101)?
TUNER(TU1101)?
YES
Check the IC507 and their peripheral circuits (IC3302).
Is TUNER_CVBS signal input to pin (AD29/TU_CVBS) of IC3302
from TUNER(TU1101)?
from TUNER(TU1101)?
YES
Check the IC3307 and their peripheral circuits (IC3302).
NO
Is TUNER_CVBS signal output from pin (6) of TUNRE(TU1101)?
YES
Check the line between TU1101 and their peripheral circuits
(Q1106)
(Q1106)
NO
Whether the TUNER circuit operates correctly is checked.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 16
<During external connection> No picture on the monitor (2-1)
No picture appears on EXT1/EXT2 connected monitor during the DTV reception.
Is CVBS signal output into pin (19) of EXT1 (SC503) from pin(67)
of IC504 (TUNER OUT)?
of IC504 (TUNER OUT)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is CVBS signal output into pin (19) of EXT2 (SC502) from pin(65)
of IC508 (MONITOR OUT)?
of IC508 (MONITOR OUT)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is CVBS signal input to pin (6) of IC504 from pin(2) of IC507
(MUX)?
(MUX)?
YES
Check the IC504 and their peripheral circuits.
NO
Is TUNER_CVBS signal input to pin (4) of IC507 from pin(AK24/
CVBS_TU_OUT) of IC3302
(Digital AV decode & Main CPU)?
CVBS_TU_OUT) of IC3302
(Digital AV decode & Main CPU)?
YES
Check the IC507 and their peripheral circuits.
NO
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)?
YES
Check the IC3302 and their peripheral circuits.
NO
Is IF signal output from pins(16, 17) of TU1101?
YES
Check the line between TU1101 and IC3302.
NO
Whether the TUNER circuit operates correctly is checked.
<During external connection> No picture on the monitor (2-2)
No picture appears on EXT1/EXT2 connected monitor during the DTV reception.
Is CVBS signal output into pin (19) of EXT1 (SC503) from pin(67)
of IC504 (TUNER OUT)?
of IC504 (TUNER OUT)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is CVBS signal output into pin (19) of EXT2 (SC502) from pin(65)
of IC508 (MONITOR OUT)?
of IC508 (MONITOR OUT)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is CVBS signal output into pin(1) of IC508 from pin(AJ24/
CVBS_MONI_OUT) of IC3302
(Digital AV decode & Main CPU)?
CVBS_MONI_OUT) of IC3302
(Digital AV decode & Main CPU)?
YES
Check the IC508 and their peripheral circuits.
NO
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)?
YES
Check the IC3302 and their peripheral circuits.
NO
Is IF signal output from pins(16, 17) of TU1101?
YES
Check the line between TU1101 and IC3302.
NO
Whether the TUNER circuit operates correctly is checked.
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