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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
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start
Is TP1(VUSB_CHG_IN)
Voltage 5.1V?
Change CN401 or FL400
Yes
TP2 (LDO4.9V)
Output is about 5V?
Change the U402
Change the main board
Cable is insert
Physically?
No
Change CN401
Yes
No
No
Is CN401 Output
Is TP3(MUIC_IO_M),
TP4(MUIC_IO_P) signal OK?
End
Yes
No
Yes
Содержание LG-S310
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