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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Start
Check the pin and battery
Connect terminals of I/O
connector
Connection OK?
Change I/O connector
Is the u- USB Cable) voltage
4.8V (or 5.0V)?
Change TA
(or u-USB Cable)
Is it charging
properly
After turning on
Q401, U404
END
NO
Yes
NO
Yes
NO
Yes
[ Charger Troubleshooting Flow ]
Check an U201 SMT status
by X-ray
Exchange U201 or
Change the Main board
And Retest