Sharp Aquos LC-42X20E, Service Manual

Page: 53 / 192

LC-32X20E/S/RU, LC-37X20E/S/RU
4 – 3
No sound (during the reception of TV (DIGITAL) broadcasting)
Does not the sound go out though the picture has come out when DTV is received?
MAIN UNIT:
Is DTV_SPDIF audio signal output from pin (T2) of IC8101 (CPU/
DECODER) to pin (2) of connector SC1101?
NO Check the line between IC8101 and SC1101, and their peripheral
circuits.
TERMINAL UNIT: YES
Is DTV_SPDIF audio signal input from pin (2) of connector
SC501 to pin (4) of IC1404 (CODEC)? NO Check the line between SC501 and IC1404.
(SC1101/SC501, etc.)
YES
Refer to “No sound output in all modes”.
No sound from external input devices (1)
Does not the sound of the audio signal input to EXT1 (SCART1) go out?
Does not the sound of the audio signal input to EXT2 (SCART2) go out?
TEREMINAL UNIT:
EXT1
Is the audio signal properly sent to pins (6) (IN1_L) and (2)
(IN1_R) of SCART1 (SC502)?
NO Check the setting of an external input device that connects of
SC502.
EXT2
Is the audio signal properly sent to pins (6) (IN2_L) and (2)
(IN2_R) of SCART2 (SC503)? NO Check the setting of an external input device that connects of
SC503.
YES
EXT1
Is the audio signal properly sent to pins (51) (IN1_L) and (52)
(IN1_R) of IC1404 (CODEC)? NO Check the line between SC502 and IC1404.
EXT2
Is the audio signal properly sent to pins (53) (IN2_L) and (54)
(IN2_R) of IC1404 (CODEC)? NO Check the line between SC503 and IC1404.
YES
Refer to “No sound output in all modes”.