Read Sharp LC-40LU700E (serv.man9) Service Manual online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 7
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/SC1_IN_L) and (2/
SC1_IN_R) of EXT1 (SC503)?
SC1_IN_R) of EXT1 (SC503)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is there a audio input signal in pins (6/SC2_IN_L) and (2/
SC2_IN_R) of EXT2 (SC502)?
SC2_IN_R) of EXT2 (SC502)?
NO
Check the setting of an external input device that connects with
EXT2.
EXT2.
YES
Is there a audio input signal in pins (V28/SC1_L) and (V27/
SC1_R) of IC3302 (Digital AV decode & Main CPU) from
SC503?
SC1_R) of IC3302 (Digital AV decode & Main CPU) from
SC503?
NO
Check the line between SC503 and IC3302.
Is there a audio input signal in pins (U27/SC2_L) and (U26/
SC2_R) of IC3302 (Digital AV decode & Main CPU) from
SC502?
SC2_R) of IC3302 (Digital AV decode & Main CPU) from
SC502?
NO
Check the line between SC502 and IC3302.
YES
Refer to “No sound output in all modes”.
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/COMP_IN_L) and (4/
COMP_IN_R) of EXT3 (J502)?
COMP_IN_R) of EXT3 (J502)?
NO
Check the setting of an external input device that connects with
EXT3.
EXT3.
YES
Is there a audio input signal in pins (U29/COMP_L) and (U28/
COMP_R) of IC3302 (Digital AV decode & Main CPU) from
J502?
COMP_R) of IC3302 (Digital AV decode & Main CPU) from
J502?
NO
Check the line between J502 and IC3302.
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?
Check whether it is selected "EXT4(RGB)" by the Audio setup of
the HDMI option.
the HDMI option.
Check whether it is selected "HDMI-2" by the Audio setup of the
HDMI option.
HDMI option.
YES
YES
Is there a audio input signal in pins(2/PC/HDMI_L) and (3/PC/HDMI_R) of HDMI-2/PC(J501)?
YES
NO
Check the setting of an external input device that connects with
HDMI-2/PC.
HDMI-2/PC.
Is there a audio input signal in pins (V30/PC/HDMI_L) and (V29/
PC/HDMI_R) of IC3302 (Digital AV decode & Main CPU) from
J501?
PC/HDMI_R) of IC3302 (Digital AV decode & Main CPU) from
J501?
NO
Check the line between J501 and IC3302.
YES
Refer to “No sound output in all modes”.
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