Sharp LC-46DH66 (serv.man5) Service Manual ▷ View online
LC-46DH65E/S, LC-46DH66E
4 – 2
No sound (during the reception of TV(DIGITAL) broadcasting)
Does not the sound go out though the picture has come out when DTV(H.264) is received?
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)?
(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.
YES
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.)?
H.264_I2S_SCLK), (6/H.264_I2S_LRCLK) and (10/
H.264_I2S_DATA) of IC1306 (SW.)?
NO
Check the line between IC5001 and IC1306.
YES
Is DIG_I2S signal input to pin (82/DTV_SCK), (83/DTV_WS)
and (84/DTV_SDO) of IC1302 (DSP)?
and (84/DTV_SDO) of IC1302 (DSP)?
NO
Check the line between IC1306 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (1)
Does not the sound of the audio signal input to EXT1/EXT2 go out?
Is there a audio input signal in pins (6/IN1L) and (2/IN1R) of
EXT1 (SC502)?
EXT1 (SC502)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is there a audio input signal in pins (6/IN2L) and (2/IN2R) of
EXT2 (SC501)?
EXT2 (SC501)?
NO
Check the setting of an external input device that connects with
EXT2.
EXT2.
YES
EXT1
Is the audio signal input to pins(9/AIN1_L) and (10/AIN1_R) of
IC1302(DSP)?
Is the audio signal input to pins(9/AIN1_L) and (10/AIN1_R) of
IC1302(DSP)?
NO
Check the line between SC502 and IC1302.
EXT2
Is the audio signal input to pins (13/AIN2_L) and (14/AIN2_R) of
IC1302 (DSP)?
Is the audio signal input to pins (13/AIN2_L) and (14/AIN2_R) of
IC1302 (DSP)?
NO
Check the line between SC501 and IC1302.
YES
Refer to “No sound output in all modes”.
LC-46DH65E/S, LC-46DH66E
4 – 3
No sound from external input devices (2)
Does not the sound of the audio signal input to EXT3 go out?
Is there a audio input signal in pins (2/IN4L) and (4/IN4R) of
EXT3 (J502)?
EXT3 (J502)?
NO
Check the setting of an external input device that connects with
EXT3.
EXT3.
YES
Is the audio signal input to pins(99/AIN4_L) and (100/AIN4_R) of
IC1302(DSP)?
IC1302(DSP)?
NO
Check the line between J502 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (3)
Does not the sound of the audio signal input to HDMI-2
mode go out?
mode go out?
Does not the sound of the audio signal input to PC mode go
out?
out?
"Checked whether to have selected " "Analogue" " by the Audio
setup of the HDMI option. "
setup of the HDMI option. "
YES
Is there a audio input signal in pins(2/PC_L) and (3/PC_R) of HDMI-2/PC(J1301)?
YES
NO
Check the setting of an external input device that connects with
HDMI-2/PC.
HDMI-2/PC.
Is the audio signal input to pins (19/AIN3_L) and (20/AIN3_R) of
IC1302 (DSP)?
IC1302 (DSP)?
NO
Check the line between J1301 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (4)
Does not the sound of the audio signal input to EXT8 go out?
Is there a audio input signal in pins(5/IN3L) and (4/IN3R) of
EXT8(J505)?
EXT8(J505)?
NO
Check the setting of an external input device that connects with
EXT8.
EXT8.
YES
Is the audio signal input to pins(28/AIN3_L) and (29/AIN3_R) of
IC1302(DSP)?
IC1302(DSP)?
NO
Check the line between J505 and IC1302.
YES
Refer to “No sound output in all modes”.
LC-46DH65E/S, LC-46DH66E
4 – 4
The audio signal is not output (1)
No audio signal output from EXT1/EXT2 terminal.(HDMI/DTV(H.264))
Is there a audio output signal in pins(3/L-ch) and (1/R-ch) of
EXT1(SC502)?
EXT1(SC502)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is there a audio output signal in pins(3/L-ch) and (1/R-ch) of
EXT2(SC501)?
EXT2(SC501)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
<EXT1>
Is SC-MUTE [pin(67) of IC9101(CPLD)] at H?
Is SC-MUTE [pin(67) of IC9101(CPLD)] at H?
YES
Check the peripheral circuits of IC9101 and SC-MUTE.
(Q503, Q505, etc.)
(Q503, Q505, etc.)
<EXT2>
Is SC2-MUTE [pin(65) of IC9101(CPLD)] at H?
Is SC2-MUTE [pin(65) of IC9101(CPLD)] at H?
YES
Check the peripheral circuits of IC9101 and SC2-MUTE.
(Q502, Q504, etc.)
(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)?
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)?
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)?
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)?
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)?
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)?
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?
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.)?
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)?
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)?
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
The audio signal is not output (2)
No audio signal output from AUDIO_OUTPUT terminal.
Is audio signal (L/R) output to pins (2, 4) of AUDIO_OUTPUT ter-
minal (J503)?
minal (J503)?
YES
Check the connection to AUDIO_OUTPUT terminal and external
input devices.
input devices.
NO
MONITOR_MUTE signal [Pin(23) of IC503(AV_SW.)] or MUTE-
A_ALL signal[Pin(21) of IC2003] will be "H"?
A_ALL signal[Pin(21) of IC2003] will be "H"?
YES
Check the peripheral circuits of IC503 and MUTE-A_ALL_LINE.
(D534, etc.)
(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.)
(Q510, Q511, Q512, Q513, etc.)
NO
Check IC1302 and its peripheral circuits.
The audio signal is not output (3)
No sound from HEADPHONE_OUTPUT terminal.
Is the HP_PLUG signal input to pin(90) of IC9101(CPLD) from
pin(6) of a HEADPHONE_OUTPUT terminal(J1302)?
pin(6) of a HEADPHONE_OUTPUT terminal(J1302)?
NO
Check the line between J1302 and IC9101.
(J1302, IC9101, etc.)
(J1302, IC9101, etc.)
YES
Is the audio signal output (HP_L/R) to pins(2, 3) of HEADPHONE
terminal(J1302)?
terminal(J1302)?
YES
Check the HEADPHONE terminal(J1302) and/or peripheral cir-
cuits.
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.)
(Q1301, etc.)
NO
Is audio signal (HP_L/R) output to pins (40, 42) of IC1302
(DSP)?
(DSP)?
YES
Check the line between IC1302 and J1302. (IC1305, etc.)
NO
Check IC1302 and its peripheral circuits.
