Table Of Contents - LG KP105 Service Manual

1. INTRODUCTION ...............................5
1.1 Purpose .................................................. 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 H/W Features...........................................7
2.2 S/W Features ...........................................8
3. TECHNICAL BRIEF ........................14
3.1 Digital Main Processor(PMB7880).........14
3.2 Power Amplifier Modul(SKY77518) .......22
3.3 26 MHz Clock(DCXO)............................24
3.4 RTC(32.768KHz Crystal) .......................25
3.5 LCD Interface(3-wire SPI interface) .......26
3.6 SIM Card Interface.................................28
3.7 KEYPAD Interface .................................29
3.8 Battery Charging Block Interface ...........30
3.9 RF Interface ...........................................31
3.10 Audio Interface.....................................33
3.11 Key LED Interface................................37
3.12 Vibrator Interface .................................38
3.13 Memory Interface .................................39
3.14 Power Block Interface ..........................40
3.15 FM Radio Interface ..............................42
4. TROUBLE SHOOTING ...................44
4.1 RF Trouble .............................................44
4.2 TX Trouble .............................................50
4.3 Power On Trouble..................................54
4.4 SIM Card Trouble...................................56
4.5 Vibrator Trouble .....................................58
4.6 Keypad Trouble......................................60
4.7 RTC Trouble ..........................................62
4.8 Key backlight Trouble ............................64
4.9 LCD Trouble...........................................66
4.10 Microphone Trouble .............................69
4.11 Receiver Trouble..................................71
4.12 Speaker Trouble ..................................73
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Only for training and service purposes

Table Of Contents

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4.13 Headphone Trouble .............................75
4.14 Charging Trouble .................................77
4.15 FM Radio Trouble ................................79
5. DOWNLOAD.......................................82
5.1 Download Setup.....................................82
5.2 Download Process .................................83
6. BLOCK DIAGRAM ..........................88
7. Circuit Diagram ..............................89
8. BGA IC PIN Check..........................93
9. PCB LAYOUT ..................................95
10. ENGINEERING MODE ..................97
10.1 About Engineering Mode .....................97
10.2 Access Codes ......................................97
10.3 Key Operation ......................................97
10.4 Engineering Mode Menu Tree .............97
11. CALIBRATION.............................106
11.1 Test Equipment Setup .......................106
11.2 Calibration Steps................................106
12. STAND ALONE TEST .................111
12.1 Test Program Setting .........................111
12.2 Tx Test ...............................................113
12.3 RX Test ..............................................114
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 115
12.1 Exploded View .................................. 115
12.2 Replacement Parts ............................117
12.3 Accessory ..........................................126
LGE Internal Use Only