LC-42/46/52D85X
6 – 4
No sound from external input devices (2)
Does not the sound of the audio signal input to INPUT3 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?
NO
Check connection of between from J901 to P901 and the exter-
nal input device.
SUB UNIT:
YES
Is audio signal input to pin (3/IN3-L), (1/IN3-R) of connector
P501?
NO
Check the connector (P901/P501).
YES
Is audio signal input to pin (55/IN3-L), (56/IN3-R) of IC1404
(CODEC)?
NO
Check the line between P501 and IC1404.
YES
Is CVBS signal detection signal V3_PLUG signal from pin (7) in
input terminal J901 normal?
NO
Check the connection to J901 and external devices.
YES
Is V3_PLUG signal input to pin (2) of IC506 (VIDEO SELEC-
TOR)?
NO
Everything from V3_PLUG_LINE J901 to pin (2) of IC506 is
checked. (connector P901/P501 and etc.)
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 INPUT4/5/6 (HDMI) go out?
Is picture of the signal input from INPUT4/5/6 displayed?
NO
Refer to “Does not the picture of the HDMI signal input to
INPUT4/5/6 go out?”.
MAIN UNIT:
YES
Is the HDMI_SPDIF audio signal output from pin (W12) of
IC3301 (VIDEO PROCESSOR) to pin (44) of connector
SC1101?
NO
Check the line between IC3301 and SC1101, and their peripheral
circuits.
SUB UNIT:
YES
Is HDMI_SPDIF audio signal input from pin (44) of connector
SC501 to pin (5) of IC1404 (CODEC)?
NO
Check the line between SC501 and IC1404.
(SC1101/SC501, etc.)
YES
Refer to “No sound output in all modes”.
