Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION................................................. 3
1.1 Purpose
1.2 Regulatory Information
2. PERFORMANCE................................................... 4
2.1 Band Specification
2.2 HW Features
2.3 RSSI Display
2.4 Current consumption
2.5 Battery bar
2.6 SW Specification
3. TROUBLE SHOOTING..........................................17
3.1 Checking XO Block
3.2 Checking Transceiver DC Power Supply Circuit Block
3.3 Checking DC-DC Block
3.4 ASM Block
3.5 GSM, WCDMA, LTE PART
3.5.1
GSM RF PART
3.5.2
WCDMA PART
3.5.3
LTE PART
3.6 Power
3.7 Charger
3.8 Audio Block
3.8.1 Audio receiver
3.8.2 Audio speaker
3.8.3 Audio Main Mic
3.8.4 Audio sub Mic
3.8.5 Audio Ear mic jack
3.8.6 FM Radio
3.9 Checking LCD Block
3.10 Checking Touch Block
3.11 Checking Compass sensor Block(
NO
)
3.12 Checking accel & gyro Block
3.13 Checking proximity Block
3.14 Checking main camera Block
3.15 Checking front camera Block
3.16 Checking Motor Block
3.17 Checking BT/WIFI/GPS Block
4. BLOCK DIAGRAM…..................................................... 58
5. CIRCUIT DIAGRAM...................................................... 70
6. BGA PIN MAP............................................................ 71
7. PCB LAYOUT…........................................................... 72
8. MEMORY VARIATION.............................................. 76
9. HIDDEN MENU.......................................................... 77
10. DOWNLOAD…............................................................ 80
11. CALIBRATION............................................................ 81
12. DISASSEMBLE GUIDE............................................... 82
13. EXPLODED VIEW………………………………………... 89
14. REPLACEMENT PART LIST..…………………………. 90
2
Содержание LM-X120HM
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