LG LM-M540 User Manual

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[CONTENTS]
❍ SECTION 1. GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
❍ SECTION 2. ELECTRICAL SECTION
• ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
• INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
• WIREING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
• PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
❍ SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
• CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
❍ SECTION 4. SPEAKER PART
• SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
❍ SECTION 5. REPLACEMENT PARTS LIST
• REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

LG LM-M540 Specifications

General

Brand	LG
Model	LM-M540
Category	Stereo System
Language	English

Summary

General Information

Servicing Precautions

Detailed precautions for servicing the unit, including handling advice.

Electrostatic Discharge Precautions

Guidelines to prevent damage from electrostatic discharge.

Electrical Section

Adjustments

Procedures and important notes for adjusting the set.

Electrical Troubleshooting Guide

Flowcharts for diagnosing electrical issues.

IC Block Diagrams

Block diagrams illustrating the internal circuitry of integrated circuits.

Schematic Diagrams

Circuit diagrams for various sections of the device.

Wiring Diagram

Diagram showing connections between internal components and PCBs.

Printed Circuit Board Layouts

Layouts of the main printed circuit boards.

Exploded Views

Cabinet and Main Frame

Exploded view of the main chassis and cabinet parts.

Tape Deck Mechanism (Left)

Exploded view and parts list for the left tape deck mechanism.

Tape Deck Mechanism (Right)

Exploded view and parts list for the right tape deck mechanism.

CD Mechanism

Exploded view and parts list for the CD mechanism assembly.

Speaker Section

Speaker Components

Exploded view and parts list for the speaker components.

Replacement Parts List

Parts List

A comprehensive list of replacement parts for the unit.