LG KG271 - Page 54

4. TROUBLE SHOOTING
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Power On Trouble
CHECKING FLOW
START
Check Battery Voltage
> 3.35V
Push power-on key
And check the level change
of PWRKEY
Check the voltage of
The LDO outputs at U102
THE PHONE WILL
POWER ON.
Charge or Change Battery
Check the contact of power key
Or dome-switch
Replace U102
YES
YES
YES
NO
NO
LDO VOLTAGE PART
V_IO 2.8V C107
V_BUF 3.2V C101
V_MEM 2.8V C109
V_ANA 2.5V C113
V_SIM 2.85V C108
VRF0 1.5V C110
NO