Read Sharp LC-46DH77E (serv.man5) Service Manual online
LC-42DH77E/RU/S/V, LC-46DH77E/RU/S/V
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)?
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)?
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”.
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