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1. INTRODUCTION ...............................5
1.1 Purpose .................................................. 5
1.2 Regulatory Information............................ 5
1.3 Abbreviations .......................................... 7
2. PERFORMANCE...............................9
2.1 H/W Features...........................................9
2.2 Technical Specification ..........................10
3. TECHNICAL BRIEF ........................15
3.1 Power Amplifier (SKY77518, U501).......15
3.2 Band Select............................................17
3.3 Transceiver (AD6548, U502) .................18
3.4 26 MHz Clock (Crystal, X500)................20
3.5 Baseband Processor (AD6726, U102)...21
3.6 Display and Interface .............................28
3.7 Camera Interface(AIT701G, U301)........30
3.8 Keypad Switches and Scanning ............32
3. 9 Microphone ...........................................33
3.10 Main Speaker.......................................34
3.11 Headset Interface.................................35
3.12 Key Back-light Illumination...................36
3.13 LCD Back-light Illumination..................37
3.14 VIBRATOR...........................................38
3.15 Battery Charging ..................................39
4. TROUBLE SHOOTING ...................40
4.1 RF Component.......................................40
4.2 RX Trouble.............................................41
4.3 TX Trouble .............................................46
4.4 Power On Trouble..................................52
4.5 Charging Trouble ...................................54
4.6 Vibrator Trouble .....................................56
4.7 LCD Trouble...........................................58
4.8 Camera Trouble .....................................61
4.9 Speaker Trouble ....................................64
4.10 SIM Card Interface Trouble..................66
4.11 Earphone Trouble ................................68
4.12 KEY backlight Trouble .........................70
4.13 Receiver Trouble..................................72
4.14 Microphone Trouble .............................74
4.15 RTC Trouble ........................................76
4.16 Bluetooth (KP175 only) ........................78
4.17 FM Radio (KP175 only)........................80
5. DOWNLOAD.......................................82
5.1 Download ...............................................82
6. BLOCK DIAGRAM ..........................88
7. CIRCUIT DIAGRAM ........................91
8. BGA IC Pin Check ..........................99
9. PCB LAYOUT ................................103
10. ENGINEERING MODE ................105
10.1 MF Mode [MENU 1] ...........................106
10.2 ELT Mode [MENU 2]..........................107
10.3 Version [MENU 3] ..............................107
10.4 Factory Reset [MENU 4] ....................108
10.5 Eng Mode [MENU 5] ..........................108
10.6 Network Info [MENU 6] ......................110
11. STAND ALONE TEST..................111
11.1 Introduction ........................................111
11.2 Setting Method...................................111
11.3 Means of Test ....................................112
12. AUTO CALIBRATION..................114
12.1 Overview ............................................114
12.2 Equipment List ...................................114
12.3 Test Jig Operation..............................115
12.4 Procedure ..........................................116
12.5 AGC ...................................................118
12.6 APC....................................................118
12.7 ADC ...................................................118
13. EXPLODED VIEW &
REPLACEMENT PART LIST ......119
13.1 Exploded View ...................................119
13.2 Replacement Parts ............................121
13.3 Accessory ..........................................135
Table Of Contents
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Summary of Contents for KP175
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