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Optical in does not work
Optical in does
not work
Go
Check pin1 of P2 on optical in
Pin1：3.3V whether normal or not
Yes
Check the input signal of U22 CS8422
whether normal
Yes
Check the voltage, clock and data of
Board
or not
U22
5-12
No
Check XP 21 of main board
whether normal or not
Yes
Check power supply
No
Check the optical connector
Trouble shooting Chart
Fix XS 3
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