LG SKC9 Service Manual page 62

Lg wi-fi sound bar

User manual

Table of Contents

WIRELESS SUBWOOFER PART

WIRING DIAGRAM ............................................................................................................................................ 4-2

BLOCK DIAGRAM ............................................................................................................................................ 4-3

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

1. POWER ON ERROR .............................................................................................................................. 4-4

2. WIRELESS CONNECTION .................................................................................................................... 4-6

WAVEFORMS OF MAJOR CHECK POINT ...................................................................................................... 4-7

1. CRYSTAL ................................................................................................................................................ 4-7

2. FLASH MEMORY ................................................................................................................................... 4-7

3. VOLTAGE ............................................................................................................................................... 4-8

4. AMP VOLTAGE ...................................................................................................................................... 4-9

5. PWM ..................................................................................................................................................... 4-10

6. LED ....................................................................................................................................................... 4-11

CIRCUIT VOLTAGE CHART ........................................................................................................................... 4-13

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 4-15

1. WOOFER SMPS & AMP P. C. BOARD ............................................................................................... 4-15

SECTION 4

CONTENTS

4-1

Only for training and service purposes.

Table of Contents