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LC-46DH65E/S, LC-46DH66E

4 – 4

Is there a audio output signal in pins(3/L-ch) and (1/R-ch) of 
EXT1(SC502)?

YES

Check the setting of an external input device that connects with 
EXT1.

Is there a audio output signal in pins(3/L-ch) and (1/R-ch) of 
EXT2(SC501)?

YES

Check the setting of an external input device that connects with 
EXT2.

NO

<EXT1>
Is SC-MUTE [pin(67) of IC9101(CPLD)] at H?

YES

Check the peripheral circuits of IC9101 and SC-MUTE.
(Q503, Q505, etc.)

<EXT2>
Is SC2-MUTE [pin(65) of IC9101(CPLD)] at H?

YES

Check the peripheral circuits of IC9101 and SC2-MUTE.
(Q502, Q504, etc.)

NO

<EXT1>
Is there a audio output signal in pins(39/SC1_OUT_L) and (38/
SC1_OUT_R) of IC503(AV_SW)?

YES

Check the line between IC503 and SC502.

<EXT2>
Is there a audio output signal in pins(37/SC2_OUT_L) and (36/
SC2_OUT_R) of IC503(AV_SW)?

YES

Check the line between IC503 and SC501.

NO

<EXT1>When the HDMI signal
Is there a audio input signal in pins(60/L1) and (59/R1) of 
IC503(AV_SW)?

YES

Check IC503 and its peripheral circuits.

<EXT2>When the HDMI signal
Is there a audio input signal in pins(58/L2) and (57/R2) of 
IC503(AV_SW)?
When the DTV(H.264) signal
Is there a audio input signal in pins(44/L9) and (43/R9) of 
IC503(AV_SW)?

NO

<EXT1>When the HDMI signal
Is there a audio output signal in pins(1/OUTTNL) and (2/OUT-
TNR) of IC1302(DSP)?

YES

Check the line between IC1302 and IC503.

<EXT2>When the HDMI signal
Is there a audio output signal in pins(17/OUT2L) and (18/
OUT2R) of IC1302(DSP)?
When the DTV(H.264) signal
Is there a audio input signal in pins(11/AOUT_L) and (10/
AOUT_R) of IC504(AUDIO_DAC)?

YES

Check the line between IC504 and IC503.

NO

When the HDMI signal
Is there signal of HDMI_SD0/WS/SCK input to pin (76, 77, 78) of 
IC1302?

YES

Check IC1302 and its peripheral circuits.

When the DTV(H.264) signal
Is H.264_I2S signal input to pin (13/H.264_I2S_MCLK), (3/
H.264_I2S_SCLK), (6/H.264_I2S_LRCLK) and (10/
H.264_I2S_DATA) of IC1306 (SW.)?

YES

Check IC1306, IC504 and its peripheral circuits

NO

When the HDMI signal
Is there signal of HDMI_SD0/WS/SCK output to pin (C10, E10, 
D10) of IC8101(DIGITAL AV DECODER & MAIN CPU & VIDEO 
PROCESSER)?

No

Check IC8101 and its peripheral circuits.

When the DTV(H.264) signal
Is H.264_I2S signal output from pin (D26/H.264_I2S_MCLK), 
(E24/H.264_I2S_SCLK), (E26/H.264_I2S_LRCLK) and (A25/
H.264_I2S_DATA) of IC5001 (H.264_DECODER)?

NO

Check IC5001 and its peripheral circuits.

LC-46DH65E/S, LC-46DH66E

4 – 5

                                             

Is audio signal (L/R) output to pins (2, 4) of AUDIO_OUTPUT ter-
minal (J503)?

YES

Check the connection to AUDIO_OUTPUT terminal and external 
input devices.

NO

MONITOR_MUTE signal [Pin(23) of IC503(AV_SW.)] or MUTE-
A_ALL signal[Pin(21) of IC2003] will be "H"?

YES

Check the peripheral circuits of IC503 and MUTE-A_ALL_LINE.
(D534, etc.)

NO

Is audio signal (L/R) output to pins (5, 6) of IC1302 (DSP)?

YES

Check the line between IC1302 and J503.
(Q510, Q511, Q512, Q513, etc.)

NO

Check IC1302 and its peripheral circuits.

                                             

Is the HP_PLUG signal input to pin(90) of IC9101(CPLD) from 
pin(6) of a HEADPHONE_OUTPUT terminal(J1302)?

NO

Check the line between J1302 and IC9101.
(J1302, IC9101, etc.)

YES

Is the audio signal output (HP_L/R) to pins(2, 3) of HEADPHONE 
terminal(J1302)?

YES

Check the HEADPHONE terminal(J1302) and/or peripheral cir-
cuits.

NO

Is HP-MUTE-LINE [pin(70) of IC19101(CPLD)] at H?

YES

Check the peripheral circuits of IC9101 and HP-MUTE_LINE.
(Q1301, etc.)

NO

Is audio signal (HP_L/R) output to pins (40, 42) of IC1302 
(DSP)?

YES

Check the line between IC1302 and J1302. (IC1305, etc.)

NO

Check IC1302 and its peripheral circuits.

LC-46DH65E/S, LC-46DH66E

4 – 6

                                             

Is the LVDS signal output from IC8101(DIGITAL_AV_DECODER_&_MAIN_CPU_&_VIDEO PROCESSER) respectively?
TA1_P/M (AC25/AC26), TB1_P/M (AD25/AD26), TC1_P/M (AE25/AE26), TD1_P/M (AE24/AF24), TE1_P/M (AE23/AF23), TCLK1_P/M (AF25/
AF26), TA2_P/M (AE22/AF22), TB2_P/M (AE21/AF21), TC2_P/M (AE20/AF20), TD2_P/M (AE18/AF18), TE2_P/M (AE17/AF17), TCLK2_P/M 
(AE19/AF19)

YES

NO

Check IC8101 and its peripheral control circuits.
(IC2003, IC9101, IC8301, IC8302, X8102, etc.)

Is the above-mentioned LVDS signal output to connector 
SC2601?

NO

Check the line between IC8101 and SC2601.

                                             

YES

Similarly, is LCD controller's control signal normal? 

NO

Please check each control signal of L/R, U/D, HV_MODE, 
ROMSEL_0/1, TEMP3/2/1, OS_EN, SHIP_EN, and PE.

PANEL_UNIT:                       

YES

Is the LVDS signal input to connector LW of the panel module?

NO

Wire harness (LW) is checked. 

 YES

Check the panel module.

                                            

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.”

LC-46DH65E/S, LC-46DH66E

4 – 7

                                            

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”