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LG-P970
LG LG-P970 Service Manual
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3.
T
E
CH
N
I
C
A
L B
R
IE
F
- 101
-
Cop
yright ©
2011 L
G E
lectronic
s. Inc
. All rig
ht res
erved.
Only f
or tra
ining an
d service pu
rposes
L
GE Int
ernal Us
e Only
3.21 Illumination Sensor
Illumination Sensor adjusts L
CD back
light current by detecting the surr
ounding brightness.
If user checks the automa
tic brightness menu, L
CD back
light current adjusting
is to be enable autom
atically
.
U101(VT_CAM FPCB) : BH16
21 IC interface to AAT2870
Figure. Illumination Sen
sor Schematic
Figure. Illumination Sensor Block Diagram
G
U101
6
4
3
2
5
1
VCC
IOUT
GND1
GC1
GC2
2
D
N
G
LSENSOR_BIAS
LSENSOR_SENS
100
102
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
3
Purpose
3
Regulatory Information
3
Abbreviations
5
2 Performance
7
Product Name
7
Supporting Standard
7
Main Parts : GSM Solution
7
HW Features
8
SW Features
10
Hw Spec
14
Battery Bar
24
3 Technical Brief
25
General Description
25
Gsm Mode
28
Umts Mode
31
Umts Transmitter
32
Gps Receiver
33
LO GENERATION and DISTRIBUTION CIRCUIT
37
Off-Chip Rf Components
39
Digital Baseband(DBB/MSM77)
44
Hardware Architecture
46
Subsystem (MSM77)
48
Arm Microprocessor Subsystem
48
Gsm Subsystem
53
Vocoder Subsystem
57
Memory Subsystem
57
Power Block
59
External Memory Interface
65
H/W Sub System
66
Display Modes
75
Audio and Sound
82
Functional Description
85
Audio Subsystem
87
Display
89
Main (5M Pixels) & Sub (M Pixels) Camera
93
Vibrator
96
Compass Sensor
97
Motion Sensor
98
Gyro Sensor
99
Proximity Sensor
100
Illumination Sensor
101
Touch Module
102
Main Features
103
4 Trouble Shooting
106
RF Component
106
Signal Path
107
Checking TCXO Block
109
Checking GSM TX Module(GSM PAM + FEM) Block
111
Checking WCDMA Block
114
Checking Pam Block
118
Checking GSM Block
125
Checking Rf Tx Level
126
Checking Rf Rx Block
130
GPS/WIFI/BT RF Components
133
Gps/Wifi/Bt Signal Path
135
Power on Troubleshooting
137
Charger Troubleshooting
140
USB Trouble Shooting
143
Audio Trouble
147
Receiver Troubleshooting
149
Camera Troubleshooting
158
Main LCD Trouble
161
SIM Detect Trouble Shooting
164
Side Key Trouble Shooting
168
Vibrator Troubleshooting
170
Motion Sensor Troubleshooting
173
Gyro/Compass Sensor Troubleshooting
175
Proximity Sensor On/Off Trouble
178
Illumination Sensor On/Off Trouble
180
Touch Trouble
182
5 Download
184
6 Block Diagram
203
Power Block Diagram
205
7 Circuit Diagram
206
8 BGA Pin Map
219
9 Pcb Layout
224
10 Calibration
234
General Description
234
Requirement
234
Setup for RF Calibration
235
Tachyon Software Installation
235
Overview of RF Calibration
240
11 Hidden Menu
245
12 Exploded View & Replacement Part List
253
Replacement Parts
254
Main Component
263
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User Guide
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LG LG-P970 Specifications
General
Brand
LG
Model
LG-P970
Category
Cell Phone
Language
English
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