43
YES
YES
YES
No sound from external input devices (3)
Does not the sound of the audio signal input to USB go out?
YES
NO
Is USB stick audio format correct? Change to correct mp3 format
MAIN
Is the USB +5V Q7105 sent to pin (1) of CN1104?
Is the USB con (CN1104) signal properly sent to pin (233)
(USB_DM0) and pin (234) (USB DP0) of IC U2102?
Refer to “No sound output in all modes”.
NO
NO
Check the connection to Q7105 and the external input device.
Check the line between CN1104 and IC2102
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