4. TROUBLE SHOOTING
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4. TROUBLE SHOOTING
4.1 Power on Trouble – 3.3V Main power
TP1
TP2
Main source power of BCM5358U :
12V is Supplied From Adaptor to Modem
Æ
Passes DC/DC and 3.3V is supplied for BCM
TP3
TP4
4. TROUBLE SHOOTING
00
1
R
I
N
D
0.1u
C17
61
C
I
N
D
02
C
u1
61
R
K0
21
0.1u
C107
71
R
K0
21
R101
DNI
CN100
ENJW0002601
KJA-DC-0-0037
4
5
3
10n
C108
ZD100
EAH61438301
PSD24C-LF
1
2
Q1
EBK61571901
SI7121DN
1
S
2
S
3
S
G
1
D
2
D
3
D
4
D
5
D
6
D
7
D
C106
DNI
DNI
C109
D1
EDSY0020101
B340A
C3
1u
C8
2.2u
C9
10n
2
R
K1.
91
C12
47p
C1
DNI
SPPH410100
4
3
5
2
6
1
20
1
N
C
ESPY0001701
C4
1u
01
R
K7
4
U2
EUSY0369702
SC424
3
31
6
1
30
32
72
92
62
22
01
52
15
31
16
20
19
82
41
21
8
9
7
2
42
21
5
18
11
17
4
VOUT
PGND4
4
NI
V
PGND5
VIN
T
S
B
XL
S
XL
V5V
BST
2
NI
V
1
NI
V
LX3
2
D
N
G
P
L
N
E
PGND6
LX2
PGND3
1
D
N
G
P
LX1
V
S
P/
N
E
3
NI
V
D
O
O
G
P
2
D
N
G
A
3
D
N
G
A
N
OT
MI
LI
VIN5
FB
VLDO
LX4
AGND1
R11
100K
C18
100n
C115
DNI
L100
2.2u
R14
100K
VA100
C15
10u
0.1u
C103
R8
2.7K
C104
22u
55
1
R
I
N
D
6
R
K6
1
3
R
K6
5
R102
100K
C101
22u
C102
22u
NP_EN
TP1
TP2
TP3
TP4