Copyright ⓒ 2017 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
3.10 USB
Check the supply voltage and signal path.
NO
Yes
NO
Yes
NO
Yes
Change main PCB
START
Connection OK?
Check the Connection of uUSB
Change I/O connector
Change uUSB Cable
Re solder CN7500
Is the uUSB Cable
voltage 5.0V? (C9507)
USB_DP is 3.3V?
(D9507)
Image
Checking Flow
Circuit Diagram
VBUS(C9507)
VBUS(C9507)
END
I/O connector(CN7500)
I/O connector(CN7500)
USB_DP(D9507)
USB_DP(D9507)
39
Summary of Contents for LG-M700TV
Page 115: ...P N FLXXXXXXXX X X 115 ...