Table of Contents
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Checking Flow
Start
Check Battery Voltage >
3.35V ?
Push Power ON key and check
the level change of PWRON
key
Check the Voltage of
MT6223D's Output
The Phone will Power
ON
NO
YES
NO
YES
NO
YES
V R F
V T C X O
V C O R E
V D D
A V D D
V M E M
V R T C
Charge or Change Battery
Charge or Change Battery
Replace U200
V o l t a g e
M e a s u r e p i n
2 . 8 V
C 1 3 2 9 P i n 1
2 . 8 V
C 3 3 0 P i n 1
1 . 8 V
C 3 2 5 P i n 1
2 . 8 V
C 3 2 6 P i n 1
2 . 8 V
C 3 3 1 P i n 1
2 . 8 V
C 3 2 8 P i n 1
2 . 7 V
C 1 2 8 P i n 1
47
P A R T
T P 1
T P 2
T P 3
T P 4
T P 5
T P 6
T P 7
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