LG 50PX950, Service Manual

Page: 83 / 105

Customer Oriented R&D Breakthrough
14. USB Trouble Shooting
• Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
Check USB 2.0 Cable
Y
Check USB HUB X-TAL
Check USB Input voltage(D3.3V)
N
Y
Y
Check USB device
If device is 2.5 inch HDD,
Check power adaptor
Replace X-TAL(X1100)
Check input voltage
Check 5V voltage level at
analog switch(IC1102, IC1101)
N
Replace one of
IC1102, IC1101 & Recheck
Y
Maybe BCM3556(IC100)
has problems. Replace It.