No Sound From External Input Devices - Sharp LC-60LE740E Service Manual

LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
Does not the sound of the audio signal input to EXT2 go out?
• Do audio signals input to pins[2/CVBS1_IN_R, 3/
CVBS1_IN_L] of EXT2 (J511)?
• Is CVBS_PLUG [4/CVBS1_PLUG] of J511 at "L"
Do audio signals input to pins [AL32/CVBS1_AINR2, AL30/
CVBS1_AINL2] of IC3303 (Digital AV decode & Main CPU)?
Refer to "The sound is not emitted from the Speaker."
Does not the sound of the audio signal input to EXT3 go out?
Do audio signals input to pins [7/COMP1_IN_R, 8/COMP1_IN_L]
of EXT3 (J511)?
Do audio signals input to pins [AK29/COMP1_AINR1, AK27/
IFCOMP1_AINL1] of IC3303 (Digital AV decode & Main CPU)?
Refer to "The sound is not emitted from the Speaker."
Does not the sound of the audio signal input to HDMI-2
mode go out?
Check whether it is selected "HDMI + Analog" by the Audio select
under Menu-Setup-Option-Terminal setting-Audio select.
Do audio signals input to pins [2/PC/HDMI_L, 3/PC/HDMI_R] of J501 (PC AUDIO_IN)?
Do audio signals input to pins [AM27/PC_HDMI_AINL4, AJ27/
PC_HDMI_AINR4] of IC3303 (Digital AV decode & Main CPU)?
Refer to "The sound is not emitted from the Speaker."

No sound from external input devices (2)

YES
YES
No sound from external input devices (3)
YES
YES
No sound from external input devices (4)
YES
YES
YES
NO Check the setting of an external input device that connects with
EXT2.
NO Check IC3303 and its peripheral circuits.
NO Check the setting of an external input device that connects with
EXT3.
NO Check IC3303 and its peripheral circuits.
Does not the sound of the audio signal input to PC/Compo-
nent mode go out?
Check whether it is selected "Video + Audio" by the Audio select
under Menu-Setup-Option-Terminal setting-Audio select.
Check the setting of an external input device that connects with
J501.
NO Check the line between J501 and IC3303.
6 – 6
YES
NO