User Manuals: LG KP275c Cell Phone Unlocking

Manuals and User Guides for LG KP275c Cell Phone Unlocking. We have 1 LG KP275c Cell Phone Unlocking manual available for free PDF download: Service Manual

LG KP275c Service Manual

LG KP275c Service Manual (175 pages)

Brand: LG | Category: Cell Phone | Size: 10.98 MB

Table of Contents

Table of Contents
2
1 Introduction

4
- Purpose
  4
- Regulatory Information
  4
- Abbreviations
  6
2 Performance

7
- Supporting Standard
  7
- Main Parts: Solution
  7
- HW Feature
  8
- HW Spec
  10
3 Technical Brief

14
- Functional Block Diagram
  14
- Baseband Processor Introduction
  15
- Power Management IC
  27
- Power ON/OFF
  34
- SIM Interface
  35
- MICRO SD Connector
  36
- Memory
  37
- LCD Display
  38
- Keypad Switching & Scanning
  39
- Keypad Back-Light Illumination
  40
- LCD Back-Light Illumination
  42
- Battery Voltage Monitor
  43
- Audio
  44
- Bluetooth
  47
- 18PIN Interface Connector
  50
- General Description
  51
- GSM Part
  54
- WCDMA Part
  59
- GSM Power Amplifier Module
  61
- WCDMA Band1 Power Amplifier Module
  62
- WCDMA Band1 Low Noise Amplifier
  63
- WCDMA Band1 Duplexer
  64
4 Trouble Shooting

65
- Trouble Shooting Test Setup
  65
- Power on Trouble
  66
- Charging Trouble
  69
- UBS Trouble
  72
- SIM Detect Trouble
  74
- Number Key Sense Trouble
  77
- Multi Key Sense Trouble
  79
- Key Pad
  80
- Keypad Backlight Trouble
  81
- Key Backlight
  82
- Micro SD Trouble
  83
- Audio Trouble
  85
- Receiver Path
  87
- Microphone Trouble
  89
- Camera Trouble
  93
- Camera Module
  94
- Main LCD Trouble
  96
- Bluetooth Trouble
  98
- RF Component
  101
- Rf Signal Path
  102
- Trouble Shooting of GSM Part
  103
- Checking Vctcxo Circuit
  104
- Trouble Shooting of WCDMA Part
  111
5 Download

117
- USB Driver Installation to Download
  117
- Device Detection
  119
- USB Port Mapping
  120
- Configuration to Download
  121
- Nexus Setting
  123
6 Circuit Diagram

124
7 Bgm Pin Map

132
8 Pcb Layout

138
9 RF Calibration

144
- Test Equipment Setup
  144
- Calibration Step
  144
10 Exploded View & Replacement Part List

150
- Exploded View
  150
- Replacement Parts
  152
- Main Component
  155
- Accessory
  173

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