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LG LH-W551TB User Manual

LG LH-W551TB
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WIRELESS DVD RECEIVER
SERVICE MANUAL
MODEL : LH-W551TB
LHS-55TBC, LHS-55TBS,
LHS-55TBW,
ACC55T, ACC55R
MODEL : LH-W551TB LHS-55TBC, LHS-55TBS, LHS-55TBW, ACC55T, ACC55R
SERVICE MANUAL
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LG LH-W551TB Specifications

General IconGeneral
BrandLG
ModelLH-W551TB
CategoryReceiver
LanguageEnglish

Summary

General Servicing and Safety Precautions

Servicing Precautions for Pick-Up Handling

Guidelines for handling the pick-up and general servicing notes.

Electrostatic Discharge (ESD) Precautions

Measures to protect against static discharge damage to sensitive components.

Product Specifications and Technical Details

Audio System Troubleshooting and Schematics

Audio Troubleshooting Guide

Flowchart for diagnosing audio system issues.

Front Circuit Troubleshooting (Part 1)

Troubleshooting flowchart for the front panel circuit (1/2).

Front Circuit Troubleshooting (Part 2)

Troubleshooting flowchart for the front panel circuit (2/2).

Wiring Diagram of System Connections

Diagram illustrating internal connections between PCBs and components.

System Block Diagram Overview

High-level overview of system components and their interconnections.

Power Supply Schematic Diagrams

Detailed circuit diagrams for the power supply unit.

Microcontroller (MICOM) Schematic Diagram

Circuit diagram for the microcontroller unit.

Front Panel Schematic Diagram

Circuit diagram for the front panel assembly.

DSP and Amplifier Schematic Diagrams

Circuit diagram for the Digital Signal Processor and Amplifier sections.

Input/Output (I/O) Schematic Diagram

Circuit diagram for input/output interfaces.

Main Microphone Schematic Diagram

Circuit diagram for the main microphone input section.

Printed Circuit Board (PCB) Layouts

Main/DVD PCB Layout (Top View)

Component layout for the main/DVD PCB, top side.

Main/DVD PCB Layout (Bottom View)

Component layout for the main/DVD PCB, bottom side.

Front Microphone PCB Layout

Component layout for the front microphone PCB.

SMPS and MIC PCB Layouts

Component layouts for the SMPS and Microphone PCBs.

Amplifier (AMP) PCB Layout

Component layout for the amplifier PCB.

DVD and Amplifier System Operations

System Operation Flowchart

Flowchart illustrating the system's startup and basic operation sequence.

System Test and Debug Flowchart

Flowchart for testing and debugging the system's functionality.

Audio Microcontroller Circuit Troubleshooting

Troubleshooting flowchart for the audio microcontroller circuit.

System Test Waveforms and Diagnostics

System Clock, Reset, and Flash Signals

Waveforms for system clock, reset, and flash read/write signals.

SDRAM Clock Signal Waveform

Waveform for the SDRAM clock signal.

Tray Open/Close Signal Waveforms

Waveforms illustrating tray open and close operations.

SLED Control Signal Waveforms

Waveforms related to sled motor control in no disc condition.

Lens Control Signal Waveforms

Waveforms for lens control signals in no disc condition.

Disc Type Judgement Waveforms

Waveforms showing disc type detection for DVD and CD.

Focus Control Waveforms

Waveforms illustrating focus control signals for DVD and CD.

Spindle Control Waveforms

Waveforms for spindle motor control in no disc condition.

RF Signal Waveform

Waveforms of the RF signal for CD and DVD playback.

ES6698FD Video Output Waveforms

Waveforms of video output signals from the ES6698FD chip.

PWM IC Audio Output Waveforms

Waveforms of audio output signals from the PWM IC.

DVD and Amplifier Waveforms

Waveforms related to DVD and amplifier signal checks.

Exploded Views and Component Identification

Cabinet and Main Frame Assembly

Exploded view of the unit's cabinet and main frame components.

Disc Deck Mechanism Exploded View

Exploded view of the disc deck mechanism.

Packing Accessory Contents

Diagram of included accessories and packing materials.

Speaker System Components

Center Speaker Exploded View

Exploded view and parts for the center speaker.

Front and Rear Speaker Exploded View

Exploded view and parts for the front/rear speakers.

Subwoofer Speaker Exploded View

Exploded view and parts for the subwoofer speaker.

Transmitter (ACC55T) Model Details

Exploded view of the wireless transmitter (ACC55T).

Receiver (ACC55R) Model Details

Exploded view of the wireless receiver (ACC55R).

Transmitter (TX) Electrical Diagrams

TX Module Block Diagram

Block diagram of the wireless transmitter module's electrical functions.

TX Sub Block Diagram

Block diagram of the transmitter's sub-circuit components.

TX Module Schematic Diagram (Part 1)

First part of the transmitter module's circuit schematic.

TX Module Schematic Diagram (Part 2)

Second part of the transmitter module's circuit schematic.

TX Module Schematic Diagram (Part 3)

Third part of the transmitter module's circuit schematic.

TX Sub Schematic Diagram

Circuit schematic for the transmitter's sub-circuit.

TX Module PCB Diagram (Upper Side)

Component layout for the transmitter module's upper side.

TX Module PCB Diagram (Lower Side)

Component layout for the transmitter module's lower side.

Transmitter (TX) Printed Circuit Diagram

Printed circuit diagram for the transmitter.

Receiver (RX) Electrical Diagrams

RX Module Block Diagram

Block diagram of the wireless receiver module's electrical functions.

RX Module Schematic Diagram (Part 1)

First part of the receiver module's circuit schematic.

RX Module Schematic Diagram (Part 2)

Second part of the receiver module's circuit schematic.

RX Module Schematic Diagram (Part 3)

Third part of the receiver module's circuit schematic.

RX Amplifier Schematic Diagram (Part 1)

First part of the receiver amplifier schematic.

RX Amplifier Schematic Diagram (Part 2)

Second part of the receiver amplifier schematic.

RX Amplifier Schematic Diagram (Part 3)

Third part of the receiver amplifier schematic.

RX Module and Amplifier Schematic

Circuit schematic combining receiver module and amplifier.

RX SMPS (Power Supply) Schematic

Circuit schematic for the receiver's SMPS (power supply).

RX Module PCB Diagram (Upper Side)

Component layout for the receiver module's upper side.

RX Module PCB Diagram (Lower Side)

Component layout for the receiver module's lower side.

Amplifier PCB Diagram (Upper Side)

Component layout for the amplifier's upper side.

RX SMPS PCB Diagram (Component Side)

Component layout for the receiver SMPS (component side).

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