LG 42lk530 Service Manual page 67

16. Trouble shooting - USB connection error
Check USB 2.0 Cable
If device is 2.5 inch HDD,
Check power adaptor
(JK1201 or JK1202)
Check 5V voltage level at Bead or Jack
Maybe LGE35230(IC101)
has problems. Replace It.
• 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)
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Only for training and service purposes
N
Check USB device
N
Check USB jack
Y
N
Y
N
Replace Jack
Replace one of
IC1203 or IC1204 and then check
LGE Internal Use Only