No Sound From External Input Devices - Sharp LC-32X20E Service Manual

LC-32X20E/S/RU, LC-37X20E/S/RU
Does not the sound of the audio signal input to EXT3 go out?
MINI AV_UNIT:
Is audio signal output from pin (5/IN3-L), (4/IN3-R) of input termi-
nal J901 to pin (3), (1) of connector P901?
TERMINAL UNIT:
Is audio signal input to pin (3/IN3-L), (1/IN3-R) of connector
P501?
Is audio signal input to pin (55/IN3-L), (56/IN3-R) of IC1404
(CODEC)?
Is CVBS signal detection signal V3_PLUG signal from pin (7) in
input terminal J901 normal?
Is V3_PLUG signal input to pin (2) of IC506 (VIDEO SELEC-
TOR)?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to EXT4/5/6 (HDMI) go out?
Is picture of the signal input from EXT4/5/6 displayed?
MAIN UNIT:
Is the HDMI_SPDIF audio signal output from pin (W12) of
IC3301 (VIDEO PROCESSOR) to pin (4) of connector SC1101?
TERMINAL UNIT:
Is HDMI_SPDIF audio signal input from pin (4) of connector
SC501 to pin (5) of IC1404 (CODEC)?
Refer to "No sound output in all modes".

No sound from external input devices (2)

YES
YES
YES
YES
YES
No sound from external input devices (3)
YES
YES
YES
NO Check connection of between from J901 to P901 and the exter-
nal input device.
NO Check the connector (P901/P501).
NO Check the line between P501 and IC1404.
NO Check the connection to J901 and external devices.
NO Everything from V3_PLUG_LINE J901 to pin (2) of IC506 is
checked. (connector P901/P501 and etc.)
NO Refer to "Does not the picture of the HDMI signal input to EXT4/
5/6 go out?".
NO Check the line between IC3301 and SC1101, and their peripheral
circuits.
NO Check the line between SC501 and IC1404.
(SC1101/SC501, etc.)
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