No Sound From External Input Devices - Sharp LC-37D44E Service Manual

LC-37D44E/S/RU-BK/GY
Does not the sound of the audio signal input to EXT3 go out?
MINI AV UNIT:
Is audio signal output from pin(5/IN3L), (4/IN3R) of input
terminal J1002 to pin(8), (6) of connector SC1001?
MAIN UNIT:
Is audio signal input to pin(8/IN3L), (6/IN3R) of connector
P1001?
Is audio signal input to pin(1/IN3L), (6/IN3R) of IC1301
(AUDIO_SELECTOR)?
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
Refer to "No sound output in all modes"
Does not the sound of the audio signal input to EXT4 go
out?
Is audio signal sent from pin(2/L) and (3/R) of input termi-
nal J1301 to pin(5) and (8) of IC1301
(AUDIO_SELECTOR)?
Check the connection between J1301 and the peripheral
circuit, the external input devices.
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?

No sound from external input devices (2)

YES
YES
YES
YES
YES
No sound from external input devices (3)
YES
NO
NO
Check connection of between from J1002 to SC1001 and the exter-
nal input device.
NO
Check the connector(SC1001/ P1001).
NO
Check the line between P1001 and IC1301.
NO
Check IC1301 and its peripheral circuits.
Check the line between IC1301 and IC3001.
Does not the sound of the audio signal input to EXT6(Analog) go
out?
Whether "Analog" has selected it in the Audio setup of the HDMI
option is checked.
Is audio signal sent from pin(2/L) and (3/R) of input terminal J1302 to
pin(3) and (7) of IC1301(AUDIO_SELECTOR)?
Check the connection between J1302 and the peripheral circuit, the
external input devices.
NO
Check IC1301 and its peripheral circuits.
4 – 3
NO
NO