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CHECKING FLOW
Check Battery Voltage
Push power-on key
And check the level change
Check t he volt age of
The LDO outputs at U101
Replace the main board
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
NO
> 3.35V
YES
NO
of PWON
YES
NO
YES
V_EXTL=1.8V, V_EXTH=2.8V, V_MMC=2.8V
V_SIM= 1.8 or 3V, V_USB=3.3V, V_RTC=1.8V
4. TROUBLE SHOOTING
Charge or Change Battery
Check the co ntact of power key
Or d ome-sw itch
Replace U101
V_IO=1.8V, V_ABB =2.8V, V_MEM=1.8V ,
V_PLL= 1. 3V
- 55 -
LGE Internal Use Only
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