Service Manuals, User Guides, Schematic Diagrams or docs for : LG Mobile Phone LG KG271, KG276 LG KG271, KG276
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Service Manual
Internal Use Only
Service Manual
KG271/KG276
Model : KG271/KG276
Date: June, 2007 / Issue 1.0
Table Of Contents
1. INTRODUCTION ...............................5 4.13 Headphone Trouble .............................75
1.1 Purpose .................................................. 5 4.14 Charging Trouble .................................77
1.2 Regulatory Information............................ 5 4.15 FM Radio Trouble ................................79
2. PERFORMANCE...............................7 5. DOWNLOAD.......................................82
2.1 H/W Features...........................................7 5.1 Download Setup.....................................82
2.2 S/W Features ...........................................8 5.2 Download Process .................................83
3. TECHNICAL BRIEF ........................14 6. BLOCK DIAGRAM ..........................88
3.1 Digital Main Processor(PMB7880).........14 7. Circuit Diagram ..............................89
3.2 Power Amplifier Module (SKY77318) ....22
3.3 26 MHz Clock (DCXO)...........................24 8. PCB LAYOUT ..................................93
3.4 RTC(32.768KHz Crystal) .......................25
9. ENGINEERING MODE ....................95
3.5 LCD Interface(3-wire SPI interface) .......26
3.6 SIM Card Interface.................................28 9.1 About Engineering Mode .......................95
3.7 KEYPAD Interface .................................29 9.2 Access Codes ........................................95
3.8 Battery Charging Block Interface ...........30 9.3 Key Operation ........................................95
3.9 RF Interface ...........................................31 9.4 Engineering Mode Menu Tree ...............95
3.10 Audio Interface.....................................33
10. CALIBRATION ..............................92
3.11 Key LED Interface................................37
10.1 Test Equipment Setup .........................92
3.12 Vibrator Interface .................................38
10.2 Calibration Steps..................................92
3.13 Memory Interface .................................39
3.14 Power Block Interface ..........................40 11. STAND ALONE TEST .................109
3.15 FM Radio Interface ..............................42 11.1 Test Program Setting .........................109
11.2 Tx Test ...............................................111
4. TROUBLE SHOOTING ...................44
11.3 RX Test ..............................................112
4.1 RF Trouble .............................................44
4.2 TX Trouble .............................................50 12. EXPLODED VIEW &
4.3 Power On Trouble..................................54 REPLACEMENT PART LIST ..... 113
4.4 SIM Card Trouble...................................56 12.1 Exploded View .................................. 113
4.5 Vibrator Trouble .....................................58
12.2 Replacement Parts ............................115
4.6 Keypad Trouble......................................60
12.3 Accessory ......................................... 125
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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