LG HB620 Manuals

LG HB620 Manuals

Manuals and User Guides for LG HB620. We have 1 LG HB620 manual available for free PDF download: Service Manual

LG HB620 Service Manual

LG HB620 Service Manual (203 pages)

Brand: LG | Category: Cell Phone | Size: 12.8 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
    8
  - Current Consumption
    15
  - Rssi Bar
    15
  - Battery BAR
    15
  - Sound Pressure Level
    16
  - Charging
    17
- 3 Technical Brief
  
  18
  - General Description
    18
  - GSM Mode
    20
  - UMTS Mode
    23
  - LO Generation and Distribution Circuits
    25
  - Off-Chip RF Components
    26
  - Digital Baseband (DBB/MSM6280)
    42
  - Subsystem(Msm6280)
    44
  - Power Block
    53
  - External Memory Interface
    58
  - H/W Sub System
    60
  - Feature List
    71
- 4 Trouble Shooting
  
  74
  - Power on Trouble
    74
  - USB Trouble
    76
  - SIM Detect Trouble
    77
  - Key Sense Trouble (KEYPAD)
    78
  - Keypad Backlight Trouble
    80
  - Micro SD Trouble
    82
  - Audio Trouble
    83
  - Camera Trouble
    94
  - Main LCD Trouble
    98
  - Bluetooth Trouble
    101
  - RF Component
    103
  - Signal Path
    104
  - Checking VCTCXO Block
    106
Trouble Shooting 4.14 Checking Front-End Module Block

108
- Checking Front-End Module Block
  108
- Ant_Sel0
  
  109
- Ant_Sel1
  
  109
- Ant_Sel2
  
  109
  - Umts_Tx_Rx
    109
  - Dcs_Pcs_Tx
    109
    
    Egsm_Tx
    109
    
    Dcs_Rx2
    109
- Tp4 Vreg_Rf_Smps
  
  110
  - Checking UMTS Block
    111
  - Checking GSM Block
    118
  - DVB-H/T Trouble
    125
- 5 Download
  
  128
  - Introduction
    128
  - Downloading Procedure
    128
  - Troubleshooting Download Errors
    141
  - Caution
    146
- 6 Block Diagram
  
  147
  - GSM & UMTS RF Block
    147
  - Interface Diagram
    149
- 7 Circuit Diagram
  
  152
- 8 BGM Pin Map
  
  162
- 9 Pcb Layout
  
  166
- 10 Calibration & Rf Auto Test (Hot Kimchi)
  
  174
  - Usage of Hot-Kimchi
    174
- 11 Exploded View & Replacement Part List
  
  178
  - Exploded View
    178
  - Replacement Parts
    180
  - Mechanic Component
    180
  - Main Component
    183
  - Accessory
    201

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