LG U890c Manuals

Manuals and User Guides for LG U890c. We have 1 LG U890c manual available for free PDF download: Service Manual

LG U890c Service Manual

LG U890c 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

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