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Speaker System
S95A1-D
Service manual
LG S95A1-D Service Manual
Smart hi-fi audio wireless multi-room sound bar
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Section 1 Summary
Table of Contents
Product Safety Servicing Guidelines for Audio Products
Servicing Precautions
General Servicing Precautions
Insulation Checking Prodedure
Electrostatically Sensitive (Es) Devices
Wireless Subwoofer Connection
Lan Update Guide
Software Update Guide
How to Wireless Factory Reset & Pairing
Hidden Mode
Version Check
Option Edit Guide
Specifications
Section 2 Electrical
One Point Repair Guide
Power Problem
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
Sound
Electrical Troubleshooting Guide
Power Supply on Smps Board
Power Supply on Main Board
System Part
Audio Output
Hdmi Output
Waveforms of Major Check Point
Adc I2S Waveform (Ic200)
Dsp Output I2S Waveform (Ic600)
Lcd Data Line Output Waveform (Ic100)
Rmc Waveform
I2C Waveform
Wiring Diagram
Block Diagrams
Power Block Diagram
System Block Diagram
Circuit Diagrams
Smps Circuit Diagram
Main - Micom Circuit Diagram
Main - Mpeg Circuit Diagram
Main - Memory Circuit Diagram
Main - Adc & I/O Circuit Diagram
Main - DCDC Circuit Diagram
Main - Dsp Circuit Diagram
Main - Dac / Amp Circuit Diagram
Hdmi Circuit Diagram
Front Circuit Diagram
Key Circuit Diagram
Circuit Voltage Chart
Ics
Capacitors
Connectors
Printed Circuit Board Diagrams
Smps P. C. Board Diagram
Main P. C. Board Diagram
Hdmi P. C. Board Diagram
Front P. C. Board Diagram
Key P. C. Board Diagram
Section 3 Cabinet & Main Chassis
Disassembly Instructions
Exploded Views
Main Set Section
Wireless Subwoofer Section
Packing Accessory Section
Section 4 Wireless Subwoofer Part
One Point Repair Guide
Power Problem
Power on Error (12 V, 5 Va)
Power on Error (3.3 Va, 3 V)
Wireless Connection
Circuit Diagrams
Woofer Smps Circuit Diagram
Woofer Amp Circuit Diagram
Woofer Key Circuit Diagram
Printed Circuit Board Diagrams
Woofer Smps P. C. Board
Woofer Amp P. C. Board
Woofer Key P. C. Board
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Quick Links
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Wireless Subwoofer Connection
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How to Wireless Factory Reset & Pairing
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Internal Use Only
SMART Hi-Fi AUDIO
Wireless Multi-room Sound Bar
SERVICE MANUAL
MODEL: LAS950M
(LAS950M, S95A1-D)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN77195062
JANUARY, 2016
Table of
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Chapters
Section 1 Summary
3
Section 2 Electrical
20
Section 3 Cabinet & Main Chassis
70
Section 4 Wireless Subwoofer Part
82
Table of Contents
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Summarization of Contents
Service Manual
Model Information
Identifies the specific model and variants of the soundbar for service purposes.
SECTION 1 SUMMARY
Product Safety Servicing Guidelines
Provides essential safety guidelines for servicing audio products.
Servicing Precautions
Outlines critical precautions and procedures for safe and effective servicing.
Wireless Subwoofer Connection
Details the process and indicators for connecting the wireless subwoofer.
LAN Update Guide
Step-by-step instructions for updating the system via LAN.
Software Update Guide
Covers methods for updating the software using USB and the companion app.
Wireless Factory Reset & Pairing
Guide on performing factory resets and pairing for wireless connectivity.
Hidden Mode Operations
Explains how to access and utilize hidden operational modes.
Version Check
Procedure for verifying the system's software and hardware versions.
Option Edit Guide
Instructions for editing system options via different methods.
Specifications
Lists detailed technical specifications of the product.
SECTION 2 ELECTRICAL
One Point Repair Guide
Troubleshooting guide for common repair issues with step-by-step solutions.
Electrical Troubleshooting Guide
Comprehensive guide for diagnosing and resolving electrical faults.
Waveforms of Major Check Points
Illustrates key signal waveforms for diagnostic checks.
Wiring Diagram
Shows the overall wiring connections between system components.
Block Diagrams
Provides high-level system architecture and power block diagrams.
Circuit Diagrams
Detailed schematics for various circuit sections of the main unit.
Circuit Voltage Chart
Lists measured voltages for critical components like ICs and capacitors.
Printed Circuit Board Diagrams
Top and bottom view layouts of the main printed circuit boards.
SECTION 3 CABINET & MAIN CHASSIS
Disassembly Instructions
Step-by-step guide for disassembling the main unit for servicing.
Exploded Views - Main Set Section
Visual breakdown of the main set components for identification and replacement.
Exploded Views - Wireless Subwoofer Section
Visual breakdown of the wireless subwoofer components.
Packing Accessory Section
Lists all accessories included in the product packaging, such as cables and manuals.
SECTION 4 WIRELESS SUBWOOFER PART
Woofer One Point Repair Guide
Troubleshooting guide for common subwoofer repair issues.
Woofer Circuit Diagrams
Schematics for the woofer's SMPS, amplifier, and key circuits.
Woofer Printed Circuit Board Diagrams
PCB layouts for the woofer's SMPS, amplifier, and key components.
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