5-2
Flow chart of trouble shooting
100NF
C107
5
REF
3
_LBO
6
_SHDN
100PF
C102
BATT
7
CLSEL
4
1
FB
GND
8
LBI
29
LX
OUT
10
C101
U106
MAX1676EUB-T
2
5
ON/_OFF
VIN
43
VOUT
10NF
LP2981AIBPX-3.3
U112
1
GND
N/C
6.3V
10UF
C120
ON/_OFF
VIN
4
3
VOUT
C113
1UF
U105
LP2985AIBPX-3.0
GND
1
N/C
2
5
RB414_II06N
M100
GND
2
1
VCC
C128
330NF
1UF
C127
100NF
C130
C121
6.3V
10UF
C100
2
5
ON/_OFF
VIN
43
VOUT
27PF
LP2981AIBPX-3.3
U100
1
GND
N/C
6.3V
10UF
C108
10NF
C109
C111
N/C
2
5
ON/_OFF
VIN
43
VOUT
6.3V
100UF
VCC
LP2985AIBPX-3.0
U102
1
GND
C131
47uF
6.3V
C110
10UF
6.3V
R100
200
47uH
L100
10UF
C112
CRS04-TE85L
D101
MCL4154
D100
C119
10NF
C122
1UF
AVCC
LED_3V3
POWER
+VBATT
3.3V
RTC_VCC
RTC_3V3
