Usb Function - LG SNC4R Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. USB FUNCTION

USB PART
Check FB306 Voltage 5.1 V
Check Reading OK
OK
YES
YES
YES
Refer to Power Part Troubleshooting
NO
Check JK501 1pin Voltage 5.1 V
NO
Check JK501 pin2(D-), pin3(D+)
3-24
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Check IC306
Replace Main PCB
NO
YES
IC501 pin35, pin36
Only for training and service purposes.