LG KF690 Manuals

Manuals and User Guides for LG KF690. We have 1 LG KF690 manual available for free PDF download: Service Manual

LG KF690 Service Manual

LG KF690 Service Manual (176 pages)

Brand: LG | Category: Cell Phone | Size: 12.67 MB

Table of Contents

Table of Contents
2
1 Introduction

4
- Purpose
  4
- Regulatory Information
  4
2 Performance

6
- Supporting Standard
  6
- Main Parts : Solution
  6
- HW Features
  7
- HW Spec
  9
3 Technical Brief

11
- General Description
  11
- GSM Mode
  13
- LO Generation and Distribution Circuits
  16
- Off-Chip RF Components
  17
- Digital Baseband (DBB/ESM6270)
  24
- Subsystem(Esm6270)
  26
- Power Block
  33
- External Memory Interface
  38
- H/W Sub System
  40
- Feature List
  53
- Touch Screen Interface
  58
4 Trouble Shooting

59
- Power on Trouble
  59
- USB Trouble
  61
- SIM Detect Trouble
  62
- Key Sense Trouble (KEYPAD)
  63
- Keypad Backlight Trouble
  66
- Micro SD Trouble
  67
- Audio Trouble
  68
- Camera Trouble
  83
- Main LCD Trouble
  86
- Bluetooth Trouble
  89
- Touch Screen Trouble
  91
- RF Component
  93
- Signal Path
  94
- Checking VCTCXO Block
  95
- Checking Front-End Module Block
  97
- Checking GSM Block
  100
5 Download

106
- Introduction
  106
- Downloading Procedure
  106
- Troubleshooting Download Errors
  119
- Caution
  121
6 Block Diagram

122
- GSM & UMTS RF Block
  122
- Interface Diagram
  123
7 Circuit Diagram

126
8 BGM Pin Map

134
9 Pcb Layout

140
10 Calibration & Rf Auto Test (Hot Kimchi)

146
- Usage of Hot-Kimchi
  146
11 Exploded View & Replacement Part List

150
- Exploded View
  150
- Replacement Parts
  152
- Mechanic Component
  152
- Main Component
  157
- Accessory
  174

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