Table of Contents
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Chapters
Table of Contents
Troubleshooting
Related Manuals for LG S75A1-D
Summarization of Contents
SECTION 1 SUMMARY
Product Safety Servicing Guidelines for Audio Products
Guidelines for safe servicing of audio products, including important notices and symbols.
Servicing Precautions
Precautions to be taken during servicing, covering general handling and static-sensitive devices.
Wireless Subwoofer Connection
Instructions for connecting and pairing the wireless subwoofer, including LED status.
LAN Update Guide
Step-by-step guide for updating firmware via LAN using the MP tool.
Software Update Guide
Methods for updating software using USB or the dedicated APP.
How to Wireless Factory Reset & Pairing
Procedure for resetting the main set and wireless subwoofer and pairing them.
Version Check
Procedure to check the firmware version of the device using the MP tool.
Option Edit Guide
Guides for editing options via PC tool (Edit-1) and remote control (Edit-2).
Specifications
Technical specifications of the product, including general, input/output, amplifier, and system details.
SECTION 2 ELECTRICAL
One Point Repair Guide
Troubleshooting guide for common electrical issues, categorized by symptom.
Electrical Troubleshooting Guide
Flowchart-based troubleshooting for power, Wi-Fi, AMP/PWM, and connectivity issues.
Waveforms of Major Check Point
Oscilloscope waveform examples for critical signals like MPEG and PWM X-TAL.
Wiring Diagram
Diagram illustrating internal connections between major modules like AMP, MAIN, and FRONT.
Block Diagrams
System and power block diagrams showing functional units and voltage distribution.
Circuit Diagrams
Detailed circuit diagrams for MICOM, MPEG, Memory, ADC/I/O, DCDC, AMP, FRONT, and KEY sections.
Circuit Voltage Chart
Table listing ICs, their types, specs, measured voltages, and Vcc/Vdd values.
Printed Circuit Board Diagrams
Top and bottom view layouts of the MAIN, AMP, FRONT, and KEY PCB assemblies.
SECTION 3 CABINET & MAIN CHASSIS
Exploded Views
Detailed exploded views of the main set, wireless subwoofer, and packing accessories.
SECTION 4 WIRELESS SUBWOOFER PART
One Point Repair Guide
Troubleshooting for subwoofer issues like no power, power errors, and wireless connection problems.
Waveforms of Major Check Point
Oscilloscope waveform examples for voltage checks (PVDD, 12V, 3.3V) and PWM signals.
Wiring Diagram
Diagram showing the wiring connections for the woofer SMPS, AMP, and KEY components.
Block Diagram
Block diagram illustrating the power flow and signal paths for the wireless subwoofer.
Circuit Diagrams
Circuit diagrams for the woofer SMPS, woofer AMP, and woofer KEY sections.
Printed Circuit Board Diagrams
Top and bottom views of the woofer SMPS, woofer AMP, and woofer KEY PCBs.
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