LG KP105 - Anti-theft Mobile Tracker (ATMT)

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4. TROUBLE SHOOTING
Power On Trouble
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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 U103
THE PHONE WILL
POWER ON.
Charge or Change Battery
Check the contact of power key
Or dome-switch
Replace U103
YES
YES
YES
NO
NO
NO
LDO VOLTAGE PART
V_IO 2.8V TP3
V_BUF 2.8V TP1
V_MEM 2.8V TP2
V_ANA 2.5V TP6
V_SIM 2.85V TP4
VRF0 1.5V TP5