LC
-
52D65E/RU
4 – 6
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 (TU7501)?
NO
Check whether I2C signal normally communicates between
TU7501 and IC7508 (COFDM - DEMOD.)
YES
Is the video signal (TUNER_CVBS) sent to pins (24) of
IC503(AV_SW.)?
NO
Check the line between TU7501 and IC503.
(IC7503, 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 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.”
Содержание LC-46D65E/RU
Страница 50: ...LC 52D65E RU 4 16 M E M O ...
Страница 52: ...LC 52D65E RU 5 2 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN BLOCK DIAGRAM 2 2 ...
Страница 57: ...LC 52D65E RU 6 3 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit Side B ...
Страница 63: ...LC 52D65E RU 7 3 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit 2 ...
Страница 64: ...LC 52D65E RU 7 4 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit 3 ...
Страница 65: ...LC 52D65E RU 7 5 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit 4 ...
Страница 66: ...LC 52D65E RU 7 6 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit 5 ...
Страница 67: ...LC 52D65E RU 7 7 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 MAIN Unit 6 ...
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Страница 78: ...LC 52D65E RU 7 18 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 LED Unit ...
Страница 79: ...LC 52D65E RU 7 19 1 2 3 10 9 7 6 5 4 8 J A B C D E F G H I 13 11 19 18 16 15 14 12 17 KEY Unit ...
Страница 80: ...LC 52D65E RU 7 20 M E M O ...