LG lg-d821 User Manual

3. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.21 USB Trouble shooting
The sequence of D821 USB is,
USB connected to D821 -> VBUS_USB_IN(FL16003) goes to 5V -> USB_DATA is triggered -> USB work
USB Trouble shooting is shown below.
Battery voltage higher than 3.2V?
START
Pin 30~35 of CN16000 are about 5V?
[VBUS_USB_IN_PM]
Pin 11~12 of CN16000 are open?
[USB_HS1_DP/DM SLIM1]]
Pin 11, 12 of CN16000 are USB Signal?
Charge or Charging the battery.
Insert USB Cable
Change Lower FPCB
If the pin 11~12 of CN16000 are short
Rework(Replace) the D16001
END
Check the Lower FPCB
No
No
No
No
Yes
Yes
Yes
Yes

LG lg-d821 Specifications

General

Brand	LG
Model	lg-d821
Category	Cell Phone
Language	English