LG SJ7 - Appendix; Trademarks and licenses

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3-1

Only for training and service purposes.

SECTION 3

ELECTRICAL

CONTENTS

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

BLOCK DIAGRAMS .......................................................................................................................................... 3-3

1. PRIMARY BLOCK DIAGRAM ................................................................................................................. 3-3

2. SECONDARY BLOCK DIAGRAM .......................................................................................................... 3-4

ONE POINT REPAIR GUIDE ............................................................................................................................ 3-5

1. PRIMARY UNIT ...................................................................................................................................... 3-5

2. SECONDARY UNIT .............................................................................................................................. 3-14

WAVEFORMS OF MAJOR CHECK POINT .................................................................................................... 3-18

1. PRIMARY UNIT .................................................................................................................................... 3-18

2. SECONDARY UNIT .............................................................................................................................. 3-22

CIRCUIT VOLTAGE CHART ........................................................................................................................... 3-25

1. IC VOLTAGE ......................................................................................................................................... 3-25

2. CAPACITOR VOLTAGE ....................................................................................................................... 3-27

3. CONNECTOR VOLTAGE ..................................................................................................................... 3-29

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-31

1. PRIMARY UNIT .................................................................................................................................... 3-31

2. SECONDARY UNIT .............................................................................................................................. 3-37