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Only for training and service purposes
4. Trouble Shooting
Figure. Charger Troubleshooting Flow
Check the pin and battery
Connect terminals of I/O connector
Connection OK?
No
Yes
Is the TP1 voltage 4.8V (or 5.0V)?
No
Yes
Is it charging properly
After turning on Q400
START
Check PMIC(U403) SMT status by X-ray
Exchange U403 or Change the main
board and Retest
Change I/O connector
Change TA (or u-USB cable)
END
No
Yes
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