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U890
LG U890 Manuals
Manuals and User Guides for LG U890. We have
3
LG U890 manuals available for free PDF download: Service Manual, User Manual, Brochure
LG U890 Service Manual (192 pages)
Brand:
LG
| Category:
Cell Phone
| Size: 4.65 MB
Table of Contents
Table of Contents
2
1 Introduction
4
Purpose
4
Regulatory Information
4
2 Performance
6
System Overview
6
Usable Environment
7
Radio Performance
7
Current Consumption
13
Rssi Bar
13
Battery BAR
13
Sound Pressure Level
14
Charging
15
3 Technical Brief
16
General Description
16
GSM Mode
19
WCDMA Mode
22
LO Phase-Locked Loop
25
Off-Chip RF Components
27
Digital Baseband(DBB/MSM6250A)
34
Hardware Architecture
35
Subsystem(Msm6250A)
37
External Memory Interface
39
H/W Sub System
40
Main Features
63
Main Component
64
Main Top Side
65
Main Bottom Side
66
Sub Bottom Side
68
Sub Top Side
68
4 Trouble Shooting
69
RF Component
69
Signal Path
70
Checking VCXO Block
71
Checking Ant. SW Module Block
74
Checking WCDMA Block
76
Checking GSM Block
83
Bluetooth RF Block
91
Power on Trouble
94
USB Trouble
96
SIM Detect Trouble
97
Key Sense Trouble
98
Camera Trouble
99
Main LCD Trouble
100
EL Sheet Trouble
102
Folder ON/OFF Trouble
103
Camera Direction Detection Trouble
104
Trans Flash Trouble
105
Audio Trouble Shooting
106
Charger Trouble Shooting
116
5 Download
119
Introduction
119
Downloading Procedure
119
Troubleshooting Download Errors
133
Caution
137
6 Block Diagram
138
GSM & WCDMA RF Block
138
Interface Diagram
140
7 Circuit Diagram
144
8 Pcb Layout
152
9 Calibration
158
Hot Kimchi
158
How to Use Hot Kimchi
162
HOT KIMCHI Example
163
10 Exploded View & Replacement Part List
166
Exploded View
166
Replacement Parts
168
Mechanic Component
168
Main Component
172
Accessory
190
Advertisement
LG U890 User Manual (87 pages)
User Guide
Brand:
LG
| Category:
Cell Phone
| Size: 4.22 MB
LG U890 Brochure (10 pages)
LG Reveal: Product Brochure
Brand:
LG
| Category:
Cell Phone
| Size: 2.66 MB
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