- 5 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION ............................................... 7
1.1 Purpose ......................................................................7
1.2 Regulatory Information .................................................7
1.3. ABBREVIATION ...........................................................9
2. PERFORMANCE ............................................. 10
2.1 Product Name ...........................................................10
2.2 Supporting Standard ..................................................10
2.3 Main Parts: GSM Solution ..........................................10
2.4 H/W Features ..........................................................11
2.5 S/W Features ............................................................13
3. H/W Circuit Description ............................... 15
3.1 Digital Main Processor (Locosto) .................................15
3.2 Power Amplifi er Module (SKY77318) .........................20
3.3 26 MHz Clock (DCXO) ................................................21
3.4 RTC(32.768KHz Crystal) ............................................22
3.5 LCD Interface(8-bit Parallel interface) ..........................23
3.6 SIM Card Interface .....................................................24
3.7 KEYPAD Interface ......................................................24
3.8 Battery Charging Block Interface ................................25
3.9 RF Interface ..............................................................26
3.10 Audio Interface ........................................................28
3.11 Key LED Interface ....................................................30
3.12 Vibrator Interface .....................................................30
3.13 Memory Interface ....................................................31
3.14 Power Block Interface ..............................................32
4. TROUBLE SHOOTING ..................................... 33
4.1 Trouble Test Set-up ....................................................33
4.2 RF Part Component ...................................................34
4.3 RX Receiver Part .......................................................37
4.4 TX Transmitter Part ....................................................40
4.5 Power On Trouble ......................................................45
4.6 Charging Trouble .......................................................47
4.7 RTC Trouble ..............................................................49
4.8 LCD Trouble ..............................................................50
4.9 Speaker & Receiver Trouble ........................................52
4.10 Headphone Trouble ..................................................55
4.11 Microphone Trouble .................................................57
4.12 SIM Card Trouble .....................................................59
4.13 KEY backlight Trouble ..............................................61
4.14 Vibrator Trouble .......................................................63
5. Trouble shooting .......................................... 65
5.1 Download Setup ........................................................65
5.2 Download Procedure .................................................66
6. BLOCK DIAGRAM .......................................... 73
7. CIRCUIT DIAGRAM ........................................ 75
8. BGA Pin Map ................................................ 81
9. PCB LAYOUT ................................................. 83
10. RF Calibration ............................................ 87
10.1 What’s the Rx Calibration? .......................................87
10.2 What’s the Tx Calibration? ........................................87
10.3 Calibration program - HOT_KIMCHI ..........................88
10.4 Calibration Setting ...................................................89
10.5 Calibration Steps .....................................................89
11. EXPLODED VIEW & REPLACEMENT
PART LIST .................................................. 95
11.1 EXPLODED VIEW .....................................................95
11.2 Replacement Parts ..................................................97
11.3 Accessory ............................................................. 113
