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LG B2000 Service Manual
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7. CIRCUIT DIAGRAM
5
E
D
O
M
T
O
O
B
.
O
N
S
S
A
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B
C
N
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a
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1
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4
0
0
2
K
C
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B
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2
1
0
2
C
N
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C
A
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0
1
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1V8_VCORE
0
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3
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K
0
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2V75_VVCXO
K
7
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4
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1
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1
1
D
2
2
D
3
3
D
6
4
D
7
5
D
6
D
8
4
S
G
5
VMEM3
M3
VMEM4
T3
T6
VMEM5
N11
VSIM
VSSRTC
A9
VSSUSB
P10
E
G
R
A
H
C
V
VCC5
L9
VCC6
M6
VCC7
M14
VCC8
P14
A8
VDDRTC
VDDUSB
V8
VEXT1-1
D16
F12
VEXT1-2
F14
VEXT1-3
VEXT1-4
K11
VEXT1-5
R15
T12
VEXT1-6
C11
VEXT2-1
VINT
A5
VMEM1
E3
H1
VMEM2
N
I
C
S
O
9
E
9
C
T
U
O
C
S
O
N
O
R
W
P
9
F
0
1
T
K
L
C
M
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A
T
A
D
M
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S
0
1
V
0
C
S
U
8
1
N
1
C
S
U
4
1
N
2
C
S
U
6
1
M
3
1
N
3
C
S
U
4
C
S
U
8
1
M
6
1
L
5
C
S
U
3
1
M
6
C
S
U
VCC1
C12
F8
VCC2
VCC3
H6
J11
VCC4
4
1
E
1
W
O
R
D
A
P
Y
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K
2
W
O
R
D
A
P
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K
6
1
A
3
W
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D
A
P
Y
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K
3
1
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4
W
O
R
D
A
P
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K
5
1
A
4
T
V
D
A
N
1
S
C
X
U
A
N
6
V
1
S
C
P
G
N
5
T
1
U
R
W
H
N
1
V
R
W
L
N
5
V
1
S
C
M
A
R
N
2
S
C
M
A
R
N
8
P
5
P
D
R
N
3
V
T
E
S
E
R
N
1
S
C
M
O
R
N
8
N
2
V
T
I
A
W
N
4
R
E
W
N
T
H
G
I
L
K
C
A
B
_
D
C
L
_
3
2
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P
G
8
1
D
T
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S
E
R
B
B
A
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9
2
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P
G
6
A
3
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P
G
3
1
T
4
1
T
4
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P
G
7
A
M
S
R
A
_
5
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P
G
7
C
M
S
T
A
_
6
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P
G
7
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P
G
5
1
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8
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P
G
6
1
V
7
1
V
9
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O
P
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N
E
G
A
T
J
1
1
T
0
L
O
C
D
A
P
Y
E
K
3
1
F
4
1
A
1
L
O
C
D
A
P
Y
E
K
2
L
O
C
D
A
P
Y
E
K
4
1
C
3
1
C
3
L
O
C
D
A
P
Y
E
K
4
L
O
C
D
A
P
Y
E
K
3
1
A
5
1
D
0
W
O
R
D
A
P
Y
E
K
8
1
J
6
_
O
I
P
G
7
_
O
I
P
G
6
1
H
4
1
J
8
_
O
I
P
G
8
1
H
9
_
O
I
P
G
8
C
N
O
X
R
_
0
_
O
P
G
0
1
_
O
P
G
8
1
V
6
1
R
1
1
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O
P
G
6
1
T
6
1
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O
P
G
7
1
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O
P
G
8
1
T
8
1
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O
P
G
6
1
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9
1
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P
G
8
1
U
8
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N
O
X
T
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1
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P
G
2
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P
G
4
1
V
0
2
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P
G
8
1
R
1
2
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P
G
8
1
P
3
1
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T
H
G
I
L
K
C
A
B
_
Y
E
K
_
2
2
_
O
P
G
S
C
_
D
C
L
_
N
I
A
M
N
_
2
4
_
O
I
P
G
9
N
S
C
_
D
C
L
_
B
U
S
N
_
3
4
_
O
I
P
G
7
V
2
S
C
M
O
R
N
_
4
4
_
O
I
P
G
9
P
5
4
_
O
I
P
G
7
T
6
4
_
O
I
P
G
8
T
L
E
S
V
_
M
I
S
_
7
4
_
O
I
P
G
1
1
P
Q
R
I
_
B
B
A
_
8
4
_
O
I
P
G
4
A
9
4
_
O
I
P
G
0
1
J
5
_
O
I
P
G
6
1
J
0
1
E
0
5
_
O
I
P
G
1
5
_
O
I
P
G
0
1
H
2
5
_
O
I
P
G
0
1
C
0
1
F
3
5
_
O
I
P
G
0
1
A
4
5
_
O
I
P
G
5
5
_
O
I
P
G
1
1
E
2
1
A
6
5
_
O
I
P
G
I
D
T
_
0
2
_
O
I
P
G
2
1
P
3
1
V
O
D
T
_
1
2
_
O
I
P
G
2
2
_
O
I
P
G
1
1
A
T
E
S
E
R
_
M
I
S
_
3
2
_
O
I
P
G
9
V
N
E
_
M
I
S
_
4
2
_
O
I
P
G
1
1
V
6
1
K
N
E
_
A
D
R
I
N
_
2
_
O
I
P
G
3
_
O
I
P
G
8
1
K
6
1
E
X
R
_
G
U
B
E
D
_
3
3
_
O
I
P
G
X
T
_
G
U
B
E
D
_
4
3
_
O
I
P
G
8
1
C
8
1
B
5
3
_
O
I
P
G
8
1
A
6
3
_
O
I
P
G
7
3
_
O
I
P
G
6
1
C
8
3
_
O
I
P
G
7
1
A
5
1
C
9
3
_
O
I
P
G
4
1
K
4
_
O
I
P
G
5
K
0
4
_
O
I
P
G
H11
GND6
GND7
H13
K8
GND8
GND9
K10
X
T
_
A
D
R
I
_
0
_
O
I
P
G
8
1
L
0
1
_
O
I
P
G
6
1
G
1
1
_
O
I
P
G
3
1
J
8
1
G
2
1
_
O
I
P
G
4
1
H
3
1
_
O
I
P
G
4
1
_
O
I
P
G
4
1
G
5
1
_
O
I
P
G
6
1
F
8
1
F
6
1
_
O
I
P
G
8
1
E
7
1
_
O
I
P
G
K
C
T
_
8
1
_
O
I
P
G
1
1
L
2
1
V
S
M
T
_
9
1
_
O
I
P
G
X
R
_
A
D
R
I
_
1
_
O
I
P
G
4
1
L
9
A
T
A
D
6
N
0
1
L
S
U
N
I
M
D
9
T
S
U
L
P
D
D4
GND1
K13
GND10
L13
GND11
M5
GND12
N5
GND13
GND14
N12
N16
GND15
GND16
P7
GND17
V15
E12
GND2
GND3
F7
F11
GND4
GND5
H5
9
J
S
F
S
C
0
A
T
A
D
3
L
1
A
T
A
D
6
L
1
P
0
1
A
T
A
D
1
1
A
T
A
D
3
R
2
1
A
T
A
D
1
R
7
N
3
1
A
T
A
D
6
P
4
1
A
T
A
D
1
T
5
1
A
T
A
D
1
L
2
A
T
A
D
8
L
3
A
T
A
D
1
M
4
A
T
A
D
5
L
5
A
T
A
D
3
N
6
A
T
A
D
7
A
T
A
D
1
N
3
P
8
A
T
A
D
8
D
D
A
5
G
3
F
9
D
D
A
I
D
S
A
1
B
1
A
O
D
S
A
3
C
S
F
S
A
2
A
I
D
S
B
O
D
S
B
5
C
S
F
I
S
B
4
C
S
F
O
S
B
3
A
K
L
C
T
S
R
U
B
4
V
N
I
K
L
C
0
1
N
N
O
K
L
C
3
1
P
9
H
T
U
O
K
L
C
7
E
E
T
A
G
_
T
U
O
K
L
C
6
C
I
D
S
C
O
D
S
C
6
E
3
H
4
1
D
D
A
6
J
5
1
D
D
A
6
1
D
D
A
8
J
3
J
7
1
D
D
A
5
J
8
1
D
D
A
9
1
D
D
A
1
J
2
D
D
A
3
D
0
2
D
D
A
6
K
1
2
D
D
A
3
K
1
K
2
2
D
D
A
3
2
D
D
A
9
K
6
F
3
D
D
A
4
D
D
A
1
D
5
F
5
D
D
A
6
G
6
D
D
A
7
D
D
A
1
E
0
0
1
U
C
B
A
7
2
5
6
D
A
0
D
D
A
1
C
1
D
D
A
5
E
0
1
D
D
A
8
H
1
F
1
1
D
D
A
3
G
2
1
D
D
A
3
1
D
D
A
1
G
K
0
1
p
9
3
5
3
1
C
8
1
1
R
A
N
T
A
B
V
F
E
R
V
2
0
1
P
T
1
3
1
C
1
0
1
D
E
1
2
1
S
D
K
3
1
2
1
0
1
C
u
1
C
T
R
V
_
8
V
1
E
W
_
F
_
1
G
A
T
J
D
N
G
N
E
G
A
T
J
N
O
W
P
R
K
C
T
I
D
T
0
_
O
D
T
1
_
O
D
T
S
M
T
T
A
B
V
1
0
1
P
T
2
4
1
C
u
1
9
1
1
P
T
4
4
1
C
p
9
3
u
1
2
2
1
C
BAT100
u
1
9
1
1
C
u
2
8
0
.
0
T
A
B
V
4
J
O
1
2
1
C
4
0
1
P
T
9
3
1
C
p
9
3
2V8_VEXT
2V75_VABB
1
1
1
C
n
7
4
n
7
4
0
0
1
C
T
X
E
V
_
8
V
2
0
0
1
5
0
1
R
K
2
8
2
1
1
R
2
.
0
8
0
1
R
2V85_VSIM
u
1
4
1
1
C
3
2
1
C
p
0
0
1
5
0
1
C
u
1
4
2
1
C
p
0
0
1
4
1
1
R
7
.
4
T
A
B
V
u
2
.
2
7
1
1
C
u
1
2
1
1
C
4
3
1
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B
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A
V
VBAT1
N2
VBAT1-1
C15
VBAT2
P2
VBAT2-1
G15
VBAT2-2
H15
VBAT3
R2
VBAT3-1
A3
VBAT3-2
B3
R5
VBAT4
VBAT5
R4
8
B
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2
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A
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7
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N
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B
B
D
DGND
M2
6
A
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V
I
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A
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5
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1
T
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N
_
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N
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GND_NET2
F15
2
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3
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2
L
AGND1
B16
AGND2
A11
AGND3
L15
AGND4
T16
N
1
N
I
A
6
1
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P
1
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6
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2
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AGND029
L10
E6
AGND03
AGND030
L11
AGND031
L12
M5
AGND032
AGND033
M6
M7
AGND034
AGND035
M10
M11
AGND036
AGND037
M12
AGND04
E7
AGND05
E10
AGND06
E11
E12
AGND07
AGND08
F5
F6
AGND09
AGND014
G5
G6
AGND015
G7
AGND016
G10
AGND017
AGND018
G11
G12
AGND019
AGND02
E5
AGND020
K5
K6
AGND021
K7
AGND022
AGND023
K10
AGND024
K11
AGND025
K12
L5
AGND026
AGND027
L6
L7
AGND028
1
0
1
U
C
B
A
B
7
3
5
6
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A
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4
1
B
AGND01
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F7
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AGND011
AGND012
F11
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2
1
1
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T
100K
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0
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4
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3
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2
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1
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0
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K
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W
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1
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A
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B
L
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3
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R
W
P
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6
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5
C
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99
101
Table of Contents
Default Chapter
2
Table of Contents
2
Introduction
3
Purpose
3
Regulatory Information
3
Abbreviations
5
Performance
7
H/W Feature
7
Technical Specification
9
Technical Brief
14
Transceiver
14
Power Amplifier Module
20
13 Mhz Clock
21
Power Supplies of RF Circuits
21
Digital Main Processor
23
Analog Main & Power Management Processor
29
Power Management
34
Display and Interface
39
Radio Interface
41
Keypad Switches and Scanning
42
Microphone
43
Main Speaker
43
Headset Interface
44
Key Back-Light Illumination
45
Vibrator
46
Trouble Shooting
47
RX Trouble
47
TX Trouble
54
Power on Trouble
62
Charging Trouble
64
Vibrator Trouble
66
LCD Trouble
68
Radio Trouble
70
Speaker Trouble
72
Circuit Diagram
73
SIM Card Interface Trouble
75
Earphone Trouble
77
Key Backlight Trouble
79
Receiver Trouble
81
Microphone Trouble
83
RTC Trouble
85
Indication LED Trouble
87
Download and Calibration
89
Download
89
Calibration
94
Block Diagram
97
Circuit Diagram
100
Pcb Layout
105
Engineering Mode
108
BB Test [MENU 1]
109
RF Test [MENU 2]
110
Sar Test
110
MF Mode [MENU 3]
111
All Auto Test
111
Key Pad
111
Trace Option [MENU 4]
112
Call Timer [MENU 5]
112
Fact. Reset [MENU 6]
112
S/W Version [MENU 7]
112
Stand Alone Test
113
Introduction
113
Setting Method
113
Means of Test
114
Auto Calibration
116
Overview
116
Requirements
116
Menu and Settings
116
Agc
118
Apc
118
Adc
118
Setting
118
How to Do Calibration
118
Exploded View & Replacement Part List
120
Exploded View
120
Replacement Parts <Mechanic Component
122
Main Component
123
Accessory
135
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LG B2000 Specifications
General
Brand
LG
Model
B2000
Category
Cell Phone
Language
English
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