Only For Training And Service Purposes - LG KP105 Service Manual

Power On Trouble
CHECKING FLOW
Check Battery Voltage
Push power-on key
And check the level change
Check the voltage of
The LDO outputs at U103
THE PHONE WILL
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

START
NO
> 3.35V
YES
NO
of PWRKEY
YES
NO
YES
POWER ON.
4. TROUBLE SHOOTING
Charge or Change Battery
Check the contact of power key
Or dome-switch
Replace U103
LDO VOLTAGE
V_BUF 2.8V
V_MEM 2.8V
V_IO 2.8V
V_SIM 2.85V
VRF0 1.5V
V_ANA 2.5V
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PART
TP1
TP2
TP3
TP4
TP5
TP6
LGE Internal Use Only