H20
J21
AA18
17
8
11
15
6
5
B6
B7
C11
C12
19
22 23
E1
26
A
B
B
H
G
E
J
I
E
D
C
H
P Q
O
M N
F
I
J
G
R
K
L
S
2
T
U
T
U
4
6
W370 & W375 Main Board Top View
Level 3 Signal Flow
2006.10.25
Rev. 1.2
Page 1 of 3
W
3
7
0
&
W
3
7
5
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
A
B
C
D
E
F
G
I
J
H
K
L
S
M
N
Q
P
O
R
T
U
CLK_13MHz
CLK32K
RF_CLK
Crystal 26MHz
AFC
APC
MICIP
MICIN
SPKP
SPKN
HSOR
HSOL
EARP
HBTXOUT
LBTXOUT
GSMRX
DCSRX
PCSRX
Antenna
FM_ANT
EARN
V HSMICP
V
F
V
V
S
L
R
W370 & W3755 Main Board Bottom View
Level 3 Signal Flow
2006.10.25
Rev. 1.2
Page 2 of 3
W
3
7
0
&
W
3
7
5
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
L
S
R
HSOL
Antenna
FM_ANT
W370 & W375 Sub-Board Top View
Level 3 Signal Flow
2006.10.25
Rev. 1.2
Page 3 of 3
W
3
7
0
&
W
3
7
5
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
34
U T
A
A
T
U
CLK_13MHz
EARP
EARN