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Only for training and service purposes

LGE Internal Use Only

3-59 3-60

PRINTED CIRCUIT BOARD DIAGRAMS

1. SMPS P.C. BOARD DIAGRAM

NOTE: Warning

Parts that are shaded are critical With

respect to risk of fire or electrical shock.

Section 1. General3
Servicing Precautions3
Notes Regarding Handling of the Pick-Up3
Notes Regarding Compact Disc Player Repairs4
Esd Precautions5
Location of Users Controls6
Front / Back Panel6
Remote Control7
Specifications8
Section 2. Exploded Views12
Cabinet and Main Frame Section12
Tape Deck Mechanism Exploded View13
Tape Deck Mechanism (A/R & A/S : Right A/R Deck)13
CD Mechanism Exploded View15
Speaker Exploded View16
Packing Accessory View20
Optional Parts20
Section 3. Audio Electrical Part22
Micom Part Check I22
Fld Display Check25
Troubleshooting25
Tape Play Part Check30
Tape Rec Part Check31
Pwm Modulation Part Check35
Power Amp Part Check38
INTERNAL BLOCK DIAGRAM of Ics40
Pin Configuration41
System Block Diagram45
Functional Block Diagram46
Wiring Diagram50
Main & Front Block Diagram51
Smps Schematic Diagram53
Interface Schematic Diagram56
Deck Schematic Diagram57
Woofer Amp Schematic Diagram59
Front Schematic Diagram60
Printed Circuit Board Diagrams65
Smps P.C. Board Diagram65
Front P.C. Board Diagram70
Section 4. CD Electrical Part74
Usb Function75
Waveforms of Major Check Point76
Audio Path76
Dsp Schematic Diagram78
Rf Servo Schematic Diagram79

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Manual14 pages

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LG MCV903 Series Specifications

General

Brand	LG
Model	MCV903 Series
Category	Stereo System
Language	English

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Table of Contents

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LG MCV903 Series Specifications

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