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3.10 USB
Check the supply voltage and signal path.
Checking Flow
START
Check the Connection of uUSB
NO
Connection OK?
Yes
NO
Is the uUSB Cable
voltage 5.0V? (C9507)
Yes
NO
USB_DP is 3.3V?
(D9507)
Yes
Change main PCB
LGE Internal Use Only
Change I/O connector
Change uUSB Cable
Re solder CN7500
END
I/O connector(CN7500)
3. TROUBLE SHOOTING
Image
VBUS(C9507)
I/O connector(CN7500)
Circuit Diagram
USB_DP(D9507)
Copyright ⓒ 2017 LG Electronics. Inc. All right
39
USB_DP(D9507)
VBUS(C9507)
reserved. Only training and service purposes
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