GB310 Service Manual
1
PANTECH
6.5.2 Power Supply Check Point
Step
Test
point
Typical Value
Condition
Checking Point
2-1
U305
Pin#1
3.8V
2, 3, 4, 5
Check route connection : VBAT
2-2
U305
Pin#5
2.8V
2, 3, 4, 5
Check route connection : VBAT
2-3
U303
Pin#4
3.8V
2, 3, 4, 5
Check route connection : VBAT
2-4
U303
Pin#5
2.8V
2, 3, 4, 5
Check route connection : VCC_RFCHIP
Fig.6-1 U305 Regulator Power Supply PCB Layout
Fig.6-2
U305 Regulator
Power Supply Schematic
TYP 3.8V
TYP 2.8V
