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4.1.2 Circuit Diagram
4.1.3 Checking Flow
Start
Check Battery
Voltage
> 3.31V ?
YES
Push END key and
check the level
change of END key
YES
Check PMIC Voltage
Output @U502
3.35V ?
YES
The Phone will Power
ON
NO
Charge or Change Battery
NO
Charge or Change Battery
NO
Replace U502
LDO Voltage
Vcore = 1.8V = TP1
VDD = 2.8V = TP2
AVDD = 2.8V = TP3
VMEM = 1.8V = TP4
VSIM = 1.8V/3V = TP5
VRTC = 1.5V = TP6
VUSB = 3.3V = TP7
VIB = 3.2V = TP8
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