5-2 Trouble shooting Chart
Yes
NO
Q13 has problem
Can’t connect
NFC
GO
NO
Yes
Yes
Can’t read USB or
USB has no sound
Go
Yes
Check the normality of the communication
between MPEG and USB
NO
No
Yes
MPEG has problem
Check the 5V voltage of XP14
Confirm whether there is 5V
voltage of S pin of Q13
No
No
N
N
Confirm whether there is response
of mobile phone
U1 has problem
The circuit of NFC can work
normally
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