Sharp AQUOS LC-42LE40E, Service Manual

Page: 43 / 157

LC-32LE40E-LC-42LE40E
43
No sound from external input devices (3)
↓
Does not the sound of the audio signal input to (Composite, Y/C) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
↓ YES
No sound from external input devices (4)
↓
Does not the sound of the audio signal input to (VGA) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
↓ YES
No sound from external input devices (5)
↓
Does not the sound of the audio signal input to (HDMI1/2) go out?
↓
↓ YES
Is the audio signal properly sent to pin (4) (AV1_AudioLIN) and pin
(6) (AV1_AudioRIN) of CN136?
NO
Check the connection to CN136 and the external input device.
Refer to “ No sound output in all modes ” .
Is the audio signal properly sent to pin4 (AV1_LIn) and pin11
(AV1_RIn) of IC U605? NO Check the line between CN136 and IC U605.
Is the audio signal properly sent to pin (2) (VGA_L_In) and pin (3)
(VGA_R_In) of CN102?
NO
Check the connection to CN102 and the external input device.
Refer to “ No sound output in all modes ” .
Is the audio signal properly sent to pin1 (VGA_LIn) and pin12
(VGA RIn) of IC U605?
NO
Check the line between CN102 and IC U605.
Refer to “ No sound output in all modes ” .
Is picture of the signal input from HDMI 1/2 displayed? NO Refer to “ Does not the picture of the HDMI signal input to
HDMI1/2 go out? ” .
Is the audio signal properly sent to IC U401?
NO
Check the line between U605 and IC U401.
Is the audio signal properly sent to IC U401?
NO
Check the line between U605 and IC U401.