Sharp LC-19S7E-BK Service Manual page 30

LC-19S7E-BK LC-26S7E-BK LC-32S7E-BK
Does not the sound of the audio signal input to SCART1 go out?
↓
TEREMINAL UNIT:
Is the audio signal properly sent to pin (6) (YPbPr2_AU_INL) and
pin (2) (YPbPr2_AU_INR) of SCART1(CN1901)?
Is the audio signal properly sent to pin (72) (AUL1) and pin (73)
(AUR1) of IC U4201?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to YPbPr (Component) go out?
MAIN UNIT:
Is the audio signal properly sent to pin (8) (YPbPr1_AU_INL) and
pin (10)( YPbPr1_AU_INR) of CN1201?
Is the audio signal properly sent to pin (70) (AUL0) and pin (71)
(AUR0) of IC U4201?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to PC(VGA) go out?
MAIN UNIT:
Is the audio signal properly sent to pin (2) (PC_AU_INL) and pin (3)
(PC_AU_INR) of CN1702?
Is the audio signal properly sent to pin (75) (AUL2) and pin (76)
(AUR2) of IC U4201?
Refer to "No sound output in all modes".
↓
↓YES
↓YES
No sound from external input devices (2)
↓
↓
↓YES
↓YES
No sound from external input devices (3)
↓
↓
↓YES
↓YES
NO
Check the setting of an external input device that connects of
CN1901.
NO
Check the line between CN1901 and IC U4201
NO
Check the connection to CN1201 and the external input device
NO Check the line between CN1201 and IC U4201.
.
NO
Check the connection to CN1702 and the external input device.
NO Check the line between CN1702 and IC U4201.
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