Read Sharp LC-37D44EBK (serv.man6) Service Manual online
LC-37D44E/S/RU-BK/GY
4 – 4
YES
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
YES
NO
Refer to “No sound output in all modes”
Check the line between IC1301 and IC3001.
No sound from external input devices (4)
Does not the sound of the audio signal input to EXT5 go out?
Is audio signal output from pin(2/COMP_AL), (4/
COMP_AR) of input terminal J1303 to pin(13), (9) of
IC1301 (AUDIO_SELECTOR)?
COMP_AR) of input terminal J1303 to pin(13), (9) of
IC1301 (AUDIO_SELECTOR)?
NO
Check connection of between from J1303 to IC1301 and the external
input device.
input device.
YES
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?
IC1301?
NO
Check IC1301 and its peripheral circuits.
YES
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
YES
NO
Refer to “No sound output in all modes”
Check the line between IC1301 and IC3001.
No sound from external input devices (5)
Does not the sound of the audio signal input to EXT6/7(HDMI) go out?
Is picture of the signal input from EXT6/7 displayed?
NO
Refer to “Does not the picture of the HDMI signal input to EXT6/7 go
out?”.
out?”.
YES
Is the HDMI_SCK/ WS/ SD0 audio signal output from
pin(86), (85), (84) of IC1951 (HDMI RECEIVER) to pin(39),
(40), (38) of IC3001 (MAIN_MICON)?
pin(86), (85), (84) of IC1951 (HDMI RECEIVER) to pin(39),
(40), (38) of IC3001 (MAIN_MICON)?
NO
Check the line between IC1951 and IC3001, and their peripheral cir-
cuits.
cuits.
YES
Refer to “No sound output in all modes”.
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