LG LG-K430DSF - 3.14 Checking USB Block

76
Copyright ⓒ 2016 LG Electronics. Inc. All right
reserved. Only training and service purposes
http://eduwebcell.blogspot.com/
3. TROUBLE SHOOTING
END
3.14 Checking USB Block
I/O connector is used as the USB port.
Image
Checking Flow
Check the Connection
of uUSB
Start
NO
Connection OK?
Change I/O connector( CN9200)
Yes
Is the signal ok for
USB+ & - ?
No
Change AP( U2100 )
YES
Change the Main PCB
YES
CN9200
Circuit Diagram