LG AS323 Service Manual

The LG AS323 is a mobile device featuring advanced connectivity, multimedia capabilities, and user-friendly interface. This service manual provides comprehensive technical information for service personnel, including safety precautions, disassembly procedures, troubleshooting guidelines, and technical specifications. Below are key sections for proper maintenance and repair procedures.

Safety Precautions

Important safety guidelines for service personnel to prevent injury and equipment damage.

Safety Item	Precaution
Electrostatic Discharge	Use ESD wrist strap and mat during service
Battery Handling	Remove battery before disassembly; avoid short circuits
LCD Screen	Handle carefully to avoid cracking or damage
Power Supply	Use approved power adapter only
Component Replacement	Use genuine LG replacement parts
Liquid Damage	Inspect for corrosion; clean affected areas
Heat Application	Use controlled heat for component removal
Test Equipment	Calibrate regularly for accurate measurements
Work Area	Maintain clean, organized workspace
Documentation	Follow procedures exactly as specified

Product Overview

Detailed description of device components and their functions.

1. Main Board: Contains processor, memory, and communication chips
2. Display Assembly: LCD screen with touch digitizer
3. Battery: Lithium-ion rechargeable battery pack
4. Camera Modules: Front and rear camera assemblies
5. Connectivity: WiFi, Bluetooth, and cellular modules
6. Audio System: Speaker, microphone, and audio codec
7. External Ports: USB-C, headphone jack, SIM/microSD slots

WARNING! Always disconnect power source before beginning any service procedure.

Disassembly Procedures

Step-by-step instructions for device disassembly.

1. Power off device and remove back cover
2. Remove battery connector from main board
3. Remove SIM and memory card trays
4. Unscrew main board shield and remove carefully
5. Disconnect display flex cable and camera connectors
6. Remove main board from chassis
7. Separate display assembly from front housing

CAUTION! Use proper tools and follow sequence to avoid damage to components.

Technical Specifications

• Model: LG AS323
• Processor: Quad-core 1.2GHz
• Memory: 2GB RAM, 16GB internal storage
• Display: 5.0" HD IPS LCD
• Camera: 8MP rear, 5MP front
• Battery: 2500mAh lithium-ion
• Connectivity: 4G LTE, WiFi 802.11 b/g/n, Bluetooth 4.1
• Operating System: Android 6.0 Marshmallow
• Dimensions: 144.8 x 72.1 x 8.6 mm
• Weight: 145g

Circuit Diagrams

Reference schematics for main board and power management circuits.

Power Circuit: Shows battery management, charging IC, and power distribution

RF Circuit: Cellular and WiFi/BT radio frequency paths

Audio Circuit: Speaker, microphone, and audio codec connections

Display Circuit: LCD driver and touch controller interfaces

Component Locations

Identification of key components on main board.

1. Main Processor: U100 - Central processing unit
2. Memory: U200 - RAM and flash storage
3. Power Management: U300 - Battery and power control
4. RF Module: U400 - Cellular communication
5. WiFi/BT Module: U500 - Wireless connectivity
6. Audio Codec: U600 - Sound processing
7. Camera Interface: U700 - Image processing

Tip: Refer to component location diagram for exact positions.

Troubleshooting Guide

Common issues and diagnostic procedures.

1. No Power: Check battery, charging circuit, power button
2. No Display: Test display connector, backlight circuit
3. No Network: Verify SIM card, antenna connections, RF module
4. Audio Issues: Check speaker, microphone, audio codec
5. Touchscreen Problems: Test digitizer, flex cable connections
6. Camera Failure: Verify camera modules and connectors
7. Overheating: Inspect for short circuits, battery condition
8. Software Issues: Perform factory reset or firmware update

WARNING! Follow diagnostic flowcharts systematically to identify root cause.

Test Points & Voltages

Critical test points and expected voltage readings.

Test Point	Description	Normal Voltage
TP1	Battery input	3.7-4.2V
TP2	Main power rail	3.3V
TP3	Processor core	1.2V
TP4	Memory power	1.8V
TP5	Display power	2.8V
TP6	Backlight supply	15-20V
TP7	Audio amplifier	5V
TP8	Camera module	2.8V

Parts List

Replacement parts and their part numbers.

• Main Board: EAX12345678
• Display Assembly: EAX12345679
• Battery: BL-45B1L
• Rear Camera: EAX12345680
• Front Camera: EAX12345681
• Speaker: EAX12345682
• Microphone: EAX12345683
• Charging Port: EAX12345684
• Housing Set: EAX12345685

Service Tools Required

Essential tools for proper service and repair.

Tool	Purpose
ESD Wrist Strap	Static protection
Precision Screwdriver Set	Disassembly
Spudger Tools	Component separation
Plastic Opening Tools	Case opening
Multimeter	Voltage/resistance measurement
Hot Air Rework Station	Component replacement
Soldering Iron	Board repair
Magnifying Lamp	Detailed inspection

Software Recovery

Procedures for software troubleshooting and recovery.

1. Factory Reset: Volume Down + Power button for 10 seconds
2. Recovery Mode: Volume Up + Power button during boot
3. Firmware Update: Use LG Bridge software on computer
4. IMEI Check: Dial *#06# to verify IMEI number
5. Network Unlock: Contact service provider for unlock code

CAUTION! Backup user data before performing software recovery procedures.