LC-32DH65E/S, LC-37DH65E/S
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
Is 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”
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