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4 . TROUBLE SHOOTING
4.8 SIM Card Interface Trouble
TEST POINT
CIRCUIT DIAGRAM
R
O
T
C
E
N
N
O
C
M
I
S
M
I
S
V
_
5
8
V
2
A
N
4
1
3
C
M
I
S
V
_
5
8
V
2
n
0
2
2
5
1
3
C
7
3
3
R
0
0
8
3
3
R
0
1
3
A
0
5
0
2
0
S
4
1
C
L
V
K
L
C
3
1
D
N
G
4
7
2
D
N
G
3
D
N
G
8
9
4
D
N
G
5
D
N
G
0
1
6
O
I
2
T
S
R
C
C
V
1
P
P
V
5
0
0
3
J
7
1
3
C
A
N
p
0
0
0
1
6
1
3
C
6
3
3
R
K
0
2
A
T
A
D
_
M
I
S
T
S
R
_
M
I
S
K
L
C
_
M
I
S
Summary of Contents for B2050
Page 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Page 8: ... 7 2 PERFORMANCE ...
Page 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Page 10: ... 9 2 PERFORMANCE ...
Page 11: ... 10 2 PERFORMANCE ...
Page 12: ... 11 2 PERFORMANCE ...
Page 13: ... 12 2 PERFORMANCE ...
Page 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Page 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Page 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Page 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Page 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Page 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Page 97: ......
Page 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Page 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
Page 105: ......
Page 113: ...10 STAND ALONE TEST 112 ...
Page 117: ......
Page 119: ......
Page 132: ... 131 ...
Page 133: ... 132 ...