Sharp LC-46X8E/S/RU, Service Manual

Page: 44 / 166

LC-46X8E/S/RU
4 – 4
No sound from external input devices (2)
The sound input from EXT3 doesn’t come out.
MINI AV_UNIT:
Is audio signal (IN3_L/R) input from pins (5, 4) of EXT3 terminal
(J901) to pins (3, 1) of connector (P901)?
NO Check connection of between from J901 to P901 and the exter-
nal input device.
TERMINAL UNIT: YES
Is audio signal (IN_3_L/IN_3_R) input to pins (3, 1) of connector
(P501)? NO Check the connector (P901/P501).
YES
Is audio signal (IN3_L/IN_3_R) input to pins (55, 56) of IC1404
(CODEC)? NO Check the line between P501 and IC1404.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (3)
The audio input from EXT4/5/6 (HDMI) doesn’t come out.
Is the picture of the signal input from EXT4/5/6 displayed?
NO Check the connection of EXT4/5/6 and an external device.
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.
TERMINAL 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”.