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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 Amplifier 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
