LG -P715 Service Manual page 92

USB Initial sequence of LG-P715 is :
USB connected to LG-P715 -> +5.0V_USB go to 5V -> MSM8225 -> USB work
Connect new data cable to the P715.
Is soldering of Common mode
filter & TVS Diode good?
Is the USB Working correctly?\
LGE Internal Use Only
Start
Is it working?
No
+5.0V_USB is
about to 5.0V ?
Yes
Yes
Yes
END
Yes
Change USB data cable
No
1. Check CN102 soldering.
2. change D106 or FL1
No
Change common mode filter (FL101) or
TVS DIODE(D103,D104)
No
Change the main board
- 92 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Only for training and service purposes