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

Page: 45 / 166

LC-46X8E/S/RU
4 – 5
No sound from external input devices (4)
The sound input from EXT6 (analog HDMI) doesn’t come out. The sound input from EXT7 (analog RGB audio) doesn’t come
out.
MAIN UnIT:
Check whether “Analog” has selected in MENU-Option -HDMI
Audio Select.
MAIN UNIT: YES
Is audio signal (L/R) sent from pins (2, 3) of EXT6 terminal
(J1502) to pins (1, 6) of IC1504 (SW)? YES Is audio signal (L/R) sent from pins (2, 3) of EXT7 terminal
(J1501) to pins (3, 7) of IC1504 (SW)?
NO NO
Check the J502 (EXT6), peripheral circuit and connection of
external input devices. Check the J501 (EXT7), peripheral circuit and connection of
external input devices.
Is audio signal (HDMI_PC_L/HDMI_PC_R) output from pins (15, 11) of IC1504 to pins (24, 26) of connector (SC1101)?
TERMINAL UNIT: YES
NO
Check the line between IC1504 and SC1101, and their peripheral
circuits.
Is audio signal (HDMI_PC_L=MAIN_L, HDMI_PC_R=MAIN_R)
sent to pins (24) and (26) of SC501? NO Check the connector (SC1101/SC501)
YES
Is audio signal (MAIN_L/MAIN_R) input to pins (59, 60) of
IC1404 (CODEC)? NO Check the line between SC501 and IC1404.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (5)
The sound input from EXT8 doesn’t come out.
TERMINAL UNIT:
Is audio signal (IN4_L/IN4_R) input from pins (2, 4) of the EXT8
terminal (J502)?
NO Check the connection to J502 and external devices.
YES
Is audio signal (IN4_L/IN4_R) input to pins (57, 58) of IC1404
(CODEC)? NO Check the line between J502 and IC1404.
YES
Refer to “No sound output in all modes”.