DOWNLOAD Sharp LC-32D65 (serv.man5) Service Manual ↓ Size: 966.46 KB | Pages: 19 in PDF or view online for FREE

Model
LC-32D65 (serv.man5)
Pages
19
Size
966.46 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Table
File
lc-32d65-sm5.pdf
Date

Sharp LC-32D65 (serv.man5) Service Manual ▷ View online

LC-32D65E/RU, LC-37D65E/RU
4 – 8
<LC-32D65E/RU, LC-37D65E/RU>
No picture on the display (3)
                                            
Does not the picture come out when DTV is received?
Is the prescriptive voltage supplied a power supply terminal of a 
TUNER circuit and IC7508 (COFDM - DEMOD)?
(Refer to a circuit diagram.)
NO
Each power supply circuit is checked.
(IC7502, IC9607, IC9604, etc.)
YES
Is IF signal sent from pins(16, 17) of TUNER(TU7501) to pins(40, 
39) of IC7508(COFDM-DEMOD.)?
NO
Check the tuner, IC7508 and their peripheral circuits.
Replace as required.
YES
Check whether I2C signal normally communicates between 
TU7501 and IC7508 (COFDM - DEMOD.)
NO
YES
Does X7501(20.25MHz) oscillate?
NO
Check X7501 and its peripheral circuits.
YES
 Is TS data (FECLK, FESTR_PSYNC, FED_D, FEVAL_DEN) 
being output from IC7508 to IC8101(DIGITAL AV DECODER & 
MAIN CPU & VIDEO PROCESSER)?
NO
Check whether a control signal is normal between IC7508 and 
IC9101(CPLD). (FE_RST, N_TUNER_INT, FERR_UNCOR, 
AGCSEL)
YES
Is TS data (FECLK, FESTR_PSYNC, FED_D, FEVAL_DEN) 
input to IC8101(DIGITAL AV DECODER & MAIN CPU & VIDEO 
PROCESSER)?
NO
Check the line between IC7508 and IC8101.
(IC7503, etc.)
YES
Refer to “The picture doesn't appear in all modes.”
LC-32D65E/RU, LC-37D65E/RU
4 – 9
<LC-32DH65E LC-37DH65E>
No picture on the display (4)
                                            
Does not the picture come out when DTV is received?
Is the prescriptive voltage supplied a power supply terminal of a 
TUNER circuit and IC7508 (COFDM - DEMOD)?
(Refer to a circuit diagram.)
NO
Each power supply circuit is checked.
(IC7502, IC9607, IC9604, etc.)
YES
Is IF signal sent from pins(16, 17) of TUNER(TU7501) to pins(40, 
39) of IC7508(COFDM-DEMOD.)?
NO
Check the tuner, IC7508 and their peripheral circuits.
Replace as required.
YES
Check whether I2C signal normally communicates between 
TU7501 and IC7508 (COFDM - DEMOD.)
NO
YES
Does X7501(20.25MHz) oscillate?
NO
Check X7501 and its peripheral circuits.
YES
 Is TS data (FECLK, FESTR_PSYNC, FED_D, FEVAL_DEN) 
being output from IC7508 to IC8101(DIGITAL AV DECODER & 
MAIN CPU & VIDEO PROCESSER)?
NO
Check whether a control signal is normal between IC7508 and 
IC9101(CPLD). (FE_RST, N_TUNER_INT, FERR_UNCOR, 
AGCSEL)
YES
s the TS data input to pin (AE4/FERR_UNCOR), (AG5/FECLK), 
(AF4/FESTR_PSYNC), (AA4/FED_D) and (AF5/FEVAL_DEN) of 
IC5001(H.264_DECODER)?
NO
Check the line between IC7508 and IC5001.
YES
Is the TMDS signal output from pin (U33, U34/ TMDSH_CLK_P/
N), (T33, T34/ TMDSH_D0_P/N), (R33, R34/ TMDSH_D1_P/N), 
and (P33, P34/ TMDSH_D2_P/N) of IC5001?
NO
Check IC5001 and its peripheral circuits.
YES
Is the TMDS signal input to pin (39, 38/ TMDSH_CLK_P/N), (42, 
41/ TMDSH_D0_P/N), (45, 44/ TMDSH_D1_P/N), and (48, 47/ 
TMDSH_D2_P/N) of IC5301(TMDS_SW.)?
NO
Check the line between IC5001 and IC5301.
YES
Is the TMDS signal output from pin (26, 27/ TMDS3H_CLK_P/N), 
(23, 24/ TMDS3H_D0_P/N), (20, 21/ TMDS3H_D1_P/N), and 
(17, 18/ TMDS3H_D2_P/N) of IC5301?
NO
Check IC5301 and its peripheral circuits.
YES
Is the TMDS signal input to pin (6, 4/ TMDS3H_CLK_P/N), (8, 7/ 
TMDS3H_D0_P/N), (11, 10/ TMDS3H_D1_P/N), and (14, 13/ 
TMDS3H_D2_P/N) of IC1507(TMDS_SW.)?
NO
Check the line between IC5301 and IC1507.
YES
Is the TMDS signal output from pin (26, 27/ TMDS_CLK_P/N), 
(23, 24/ TMDS_D0_P/N), (20, 21/ TMDS_D1_P/N), and (17, 18/ 
TMDS_D2_P/N) of IC1507?
NO
Check IC1507 and its peripheral circuits.
YES
Is the TMDS signal input to pin (K1, K2/ TMDS_CLK_P/N), (L1, 
L2/ TMDS_D0_P/N), (M1, M2/ TMDS_D1_P/N), and (N1, N2/ 
TMDS_D2_P/N) of IC8101(DIGITAL AV DECODER & MAIN 
CPU & VIDEO PROCESSER)?
NO
Check the line between IC1507 and IC8101.
YES
Refer to “The picture doesn't appear in all modes”
LC-32D65E/RU, LC-37D65E/RU
4 – 10
[External input EXT1,EXT2] No picture on the display (5)
                                            
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 (6)
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-32D65E/RU, LC-37D65E/RU
4 – 11
[External input EXT1,EXT2] No picture on the display (7)
                                            
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)/R1, (88)/G1 
and (90)/B1 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 (8)
                                            
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 SC502 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”
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