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3-1

Only for training and service purposes.

SECTION 3

ELECTRICAL

CONTENTS

WIRING DIAGRAM ............................................................................................................................................ 3-2

BLOCK DIAGRAM ............................................................................................................................................ 3-3

ONE POINT REPAIR GUIDE ............................................................................................................................ 3-4

1. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO”

ON FRONT PANEL ................................................................................................................................. 3-4

2. NO SOUND ............................................................................................................................................. 3-8

3. PROTECTION ERROR ......................................................................................................................... 3-12

WAVEFORMS OF MAJOR CHECK POINT .................................................................................................... 3-14

1. CRYSTAL .............................................................................................................................................. 3-14

2. FLASH MEMORY ................................................................................................................................. 3-14

3. USB ....................................................................................................................................................... 3-15

4. REMOTE CONTROL ............................................................................................................................ 3-16

5. OPTICAL ............................................................................................................................................... 3-17

CIRCUIT VOLTAGE CHART ........................................................................................................................... 3-19

1. IC VOLTAGE ......................................................................................................................................... 3-19

2. CAPACITOR VOLTAGE ....................................................................................................................... 3-21

3. CONNECTOR VOLTAGE ..................................................................................................................... 3-21

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-23

1. MAIN P. C. BOARD DIAGRAM ............................................................................................................ 3-23

2. AMP P. C. BOARD DIAGRAM ............................................................................................................. 3-25

3. FRONT P. C. BOARD DIAGRAM ......................................................................................................... 3-27

4. USB P. C. BOARD DIAGRAM .............................................................................................................. 3-27

5. KEY P. C. BOARD DIAGRAM .............................................................................................................. 3-27

Brand	LG
Model	GX / SPN5-W
Category	Speaker System
Language	English

LG GX / SPN5-W User Manual

Table of Contents

Questions and Answers:

LG GX / SPN5-W Specifications

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