Sharp LC-19LS410UT, Service Manual

Page: 32 / 115

LC-19LS410UT, LC-22LS510UT
32
No sound from external input devices (1)
↓
Does not the sound of the audio signal input to input2(Component) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (2)
↓
Does not the sound of the audio signal input to input1 (Composite) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (3)
↓
Does not the sound of the audio signal input to VGA go out?
MAIN UNIT:
↓
↓ YES
↓ YES
Is the audio signal properly sent to pin (8) (YPBPR_L_IN2) and pin
(11)( YPBPR R IN2) of CN103?
NO
Check the connection to CN103 and the external input device.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (99) (AIN4_L) and pin (97)
NO
Check the line between CN103 and IC U401.
Is the audio signal properly sent to pin (4) (AV2_AudioLIN) and pin
(7) (AV2 AudioRIN) of CN105?
NO
Check the connection to CN105 and the external input device.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (103) (AIN6_L) and pin (101)
(AIN6_R) of IC U401?
NO
Check the line between CN105 and IC U401.
Is the audio signal properly sent to pin (2) (VGA_LIN) and pin (3)
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 pin (102) (AIN5_L) and pin (100)
(AIN5_R) of IC U401?
NO
Check the line between CN102 and IC U401.