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Model
LC-52DH65E (serv.man4)
Pages
16
Size
866.73 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Table
File
lc-52dh65e-sm4.pdf
Date

Sharp LC-52DH65E (serv.man4) Service Manual ▷ View online

LC-52DH65E/S, LC-52DH66E
4 – 8
[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?
Is CVBS signal sent to pin(20) of EXT1 (SC502)?
NO
Check the setting of an external input device that connects with 
EXT1.
Is CVBS signal sent to pin(20) of EXT2(SC501)?
NO
Check the setting of an external input device that connects with 
EXT2.
YES
Is CVBS signal from EXT1(SC502) sent to pin(100) of 
IC503(AV_SW.)?
NO
Check the line between SC502 and IC503.
Is CVBS signal from EXT2(SC501) sent to pin(6) of 
IC503(AV_SW.)?
NO
Check the line between SC501 and IC503.
YES
Is CVBS signal output from pin(71) of IC503?
NO
Check the IC503 and their peripheral circuits.
YES
Is CVBS signal sent to pin(V4) of IC8101(DIGITAL AV 
DECODER & MAIN CPU & VIDEO PROCESSER) from pin(71) 
of IC503?
NO
Check the line between IC503 and IC8101.
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?
Is Y/C video signal sent to pins(20)/Y and (15)/C of 
EXT1(SC502)?
NO
Check the setting of an external input device that connects with 
EXT1.
Is Y/C video signal sent to pins(20)/Y and (15)/C of 
EXT2(SC501)?
NO
Check the setting of an external input device that connects with 
EXT2.
YES
Is Y/C signal from EXT1(SC502) sent to pins(2)/Y, (86)/C of 
IC503(AV_SW.)?
NO
Check the line between SC502 and IC503.
Is Y/C signal from EXT2(SC501) sent to pins(8)/Y, (92)/C of 
IC503(AV_SW.)?
NO
Check the line between SC501 and IC503.
YES
Is Y/C signal output from pins(71)/Y, (70)/C of IC503?
NO
Check the IC503 and their peripheral circuits.
YES
Is Y/C signal sent to pins(V4)/Y, (P4)/C of IC8101(DIGITAL AV 
DECODER & MAIN CPU & VIDEO PROCESSER) from pins(71)/
Y, (70)/C of IC503?
NO
Check the line between IC503 and IC8101.
YES
Refer to “The picture doesn’t appear in all modes.”
LC-52DH65E/S, LC-52DH66E
4 – 9
[External input EXT1,EXT2] No picture on the display (6)
                                            
Does not the picture of the R/G/B signal input to EXT1 go out?
Does not the picture of the R/G/B signal input to EXT2 go out?
Is RGB1 signal sent to pins (15)/R1, (11)/G1 and (7)/B1 of 
EXT1(SC502)?
NO
Check the setting of an external input device that connects with 
EXT1.
Is RGB2 signal sent to pins (15)/R2, (11)/G2 and (7)/B2 of 
EXT2(SC501)?
NO
Check the setting of an external input device that connects with 
EXT2.
YES
Is RGB1 signal from EXT1(SC502) sent to pins (86)/R1, (82)/G1 
and (84)/B1 of IC503 (AV_SW.)?
NO
Check the line between SC502 and IC503.
Is RGB2 signal from EXT2 (SC501) sent to pins (92)/R2, (88)/G2 
and (90)/B2 of IC503 (AV_SW.)?
NO
Check the line between SC501 and IC503.
YES
Is RGB signal output from pins (73)/R_TR, (75)/G_TR and (74)/
B_TR of IC503?
NO
Check the IC503 and their peripheral circuits.
YES
Is RGB signal sent to pins(T1)/R_TR, (U2)/G_TR, (P3)/B_TR of 
IC8101(DIGITAL AV DECODER & MAIN CPU & VIDEO PRO-
CESSER) from pins(73)/R_TR, (75)/G_TR, (74)/B_TR of IC503?
NO
Check the line between IC503 and IC8101.
YES
Refer to “The picture doesn’t appear in all modes.”
[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(J501)?
NO
Check the setting of an external input device that connects with 
EXT3.
YES
Is COMPONENT video signal from EXT3(J501) sent to pins(94)/
Y, (96)/Pb and (98)/Pr of IC503(AV_SW.)?
NO
Check the line between J501 and IC503.
YES
Is COMPONENT video signal output from pins(75)/COMP_Y, 
(74)/COMP_PB and (73)/COMP_PR of IC503? 
NO
Is COMP1_PLUGl detection signal to pin(79) of IC503 input from 
pin(2) of EXT3 (J501)?
YES
YES
Check the IC503 and their peripheral circuits.
Is COMPONENT signal sent to pins(U2)/COMP_Y, (P3)/
COMP_PB and (T1)/COMP_PR of IC8101(DIGITAL AV 
DECODER & MAIN CPU & VIDEO PROCESSER) from pins(75)/
COMP_Y, (74)/COMP_PB, (73)/COMP_PR of IC503?
NO
Check the line between IC503 and IC8101.
YES
Refer to “The picture doesn't appear in all modes”
LC-52DH65E/S, LC-52DH66E
4 – 10
[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) of EXT4 (SC1504)?
NO
Check the connection and setup with the external DVI devices.
YES
Are the video signal and the synchronized signal input from pins 
(R1, T4, N3)/(R, G, B), pins (AF2, AE2)/(H, V) of IC8101 (DIGI-
TAL AV DECODER & MAIN CPU & VIDEO PROCESSER)?
NO
Check the line between SC1504 and IC8101.
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.
YES
Is CVBS signal from EXT8 (J505) sent to pin (12) of IC503 
(AV_SW.)?
NO
Check the line between J505 and IC503.
YES
Is CVBS signal output from pin (71) of IC503?
NO
Is V3_PLUG detection signal to pin (13) of IC503 input from pin 
(7) of EXT8 (J505)?
YES
NO
Check the IC503 and their peripheral circuits.
Is CVBS signal sent to pin (V4) of IC8101 (DIGITAL AV 
DECODER & MAIN CPU & VIDEO PROCESSER) from pin (71) 
of IC503?
NO
Check the line between IC503 and IC8101.
YES
Refer to “The picture doesn't appear in all modes.”
LC-52DH65E/S, LC-52DH66E
4 – 11
[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?
Is the Hot plug detection function output from pin (19) of the HDMI-
1(SC1502) normal?
NO
Check the line between SC1502 and pin(50) of 
IC1507(TMDS-SW).
Is the Hot plug detection function output from pin (19) of the HDMI-
2(SC1501) normal?
NO
Check the line between SC1501 and pin(35) of 
IC1507(TMDS-SW).
Is the Hot plug detection function output from pin (19) of the HDMI-
3(SC5301) normal?
NO
Check the line between SC5301 and pin(50) of 
IC5301(TMDS-SW).
YES
NO
Check the setting of an external input device that con-
nects with HDMI-1/2/3.
Is EDID data pins(11)/SCL1, (10)/SDA1 of IC1504(FRAM) accessed, and 
is it read from pins(15, 16) of a HDMI-1(SC1502)?
Is EDID data pins(14)/SCL2, pin(13)/SDA2 of IC1504(FRAM) accessed, 
and is it read from pins(15, 16) of a HDMI-2(SC1501)?
NO
Is access possible in the exchange of IC1504?
Is EDID data pins(5)/SCL3, (6)/SDA3 of IC1504(FRAM) accessed, and is 
it read from pins(15, 16) of a HDMI-3(SC5301)?
NO
YES
<HDMI-1/2>
Check the peripheral circuit of SC1501, SC1502, IC1504 
and IC1507.
<HDMI-3>
Check the peripheral circuit of SC5301, IC1504 and 
IC5301.
Is TMDS signal input into pins (54, 53/TMDS1_CLK_P/N), (57, 56/
TMDS1_D0_P/N), (60, 59/TMDS1_D1_P/N), (63, 62/ 
TMDS1_D2_P/N) of IC1507 (TMDS-SW) from HDMI-1(SC1502)?
NO
Check the line between HDMI-1(SC1502) and IC1507.
YES Is TMDS signal input into pins (39, 38/TMDS2_CLK_P/N), (42, 41/
TMDS2_D0_P/N), (45, 44/TMDS2_D1_P/N), (48, 47/ 
TMDS2_D2_P/N) of IC1507 (TMDS-SW) from HDMI-2 (SC1501)?
NO
Check the line between HDMI-2(SC1501) and IC1507.
Is TMDS signal input into pins(54, 53/TMDS3_CLKP/N), (57, 56/
TMDS3_D0P/N), (60, 59/TMDS3_D1P/N), (63, 62/ TMDS3_D2P/
N) of IC5301(TMDS-SW) from HDMI-3(SC5301)?
NO
Check the line between HDMI-3(SC5301) and IC5301.
YES
Are TMDS_Rx and the I2C_SINK signal output from IC5301 
respectively?
Pins(26, 27/TMDS3H_CLK_P/N), (23, 24/TMDS3H_D0_P/N), (20, 
21/TMDS3H_D1_P/N), (17, 18/TMDS3H_D2_P/N), (29, 30/
SCL3H_ SINK/SDA3H_SINK)
NO
Check the IC5301 and peripheral circuits.
YES
Is the TMDS_Rx/ I2C_SINK signal output from IC5301 input to 
IC1507(TMDS-SW)?
Pins(6,4 /TMDS3H_CLK_P/N), (8, 7/TMDS3H_D0_P/N), (11, 10/
TMDS3H_D1_P/N), (14, 13/TMDS3H_D2_P/N), (2, 1/SCL3H_ 
SINK/SDA3H_SINK)
NO
Check the line between IC5301 and IC1507.
YES
Are TMDS_Rx and the I2C_SINK signal output from IC1507 respectively?
Pins(26, 27/TMDS_CLK_P/N), (23, 24/TMDS_D0_P/N), (20, 21/ 
TMDS_D1_P/N), (17, 18/TMDS_D2_P/N), (29, 30/SCL_SINK/
SDA_SINK)
NO
Check the IC1507 and peripheral circuits.
YES
Is the TMDS_Rx/ I2C_SINK signal output from IC1507 input to 
IC8101(DIGITAL AV DECODER & MAIN CPU & VIDEO PROCESSER)?
NO
heck the line between IC1507 and IC8101.
Pins(K1, K2/TMDS_CLK_P/N), (L1, L2/TMDS_D0_P/N), (M1, M2/
TMDS_D1_ P/N), (N1, N2/TMDS_D2_P/N), (G2, G3/SCL_SINK/
SDA_SINK)
YES
Refer to “The picture doesn't appear in all modes” or “No 
sound output in all modes”
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