TABLE OF CONTENTS
PARAGRAPH
PAGE NO.
SECTION I
POWER SUPPLY THEORY OF OPERATION
1-1
Introduction
1-1
1-3
General Description
1-1
1-6
AC Input
1-1
1-8
Conventional Rectifier Circuitry
1-1
1-10
Soft-Start Circuit
1-1
1-12
AC Line Detection/Synchronization
1-2
1-15
Soft-Start Control Circuit
1-2
1-18
Power Factor Corrector Circuit Board Control Circuit
1-2
1-20
SCR Controlled Rectifier Circuit
1-5
1-23
Filter Circuit
1-5
1-25
Power Supply Enable Circuit
1-5
1-28
Switching Regulator Circuit
1-5
1-30
Low Voltage Power Supply
1-6
1-31
Switching Regulator Control Circuit
1-6
1-33
Switching Regulator Circuit Operation
1-6
1-34
Power Control/Correction Circuit
1-6
1-38
Fault Detection
1-7
1-43
Crowbar Circuit
1-7
1-47
Power Supply Circuit Grounds
1-8
SECTION II
POWER SUPPLY CIRCUIT BOARD MAINTENANCE
2-1
Introduction
2-1
2-3
Safety Considerations
2-1
2-6
First Level Maintenance
2-1
2-8
Cleaning and Inspection
2-1
2-10
Second Level Maintenance
2-2
2-12
Troubleshooting
2-2
2-13
Safety Considerations
2-2
2-14
Removing/Installing a Power Supply Circuit Board
2-2
2-17
Troubleshooting Procedures
2-3
2-18
Component Replacement Procedure
2-4
SECTION III
POWER SUPPLY CIRCUIT BOARD PARTS LIST
3-1
Introduction
3-1
SECTION IV
POWER SUPPLY CIRCUIT BOARD DRAWINGS
4-1
Introduction
4-1
LIST OF ILLUSTRATIONS
FIGURE
TITLE
PAGE NO.
1-1
POWER SUPPLY CIRCUIT BOARD
1-3
SIMPLIFIED SCHEMATIC
LIST OF TABLES
TABLE
TITLE
PAGE NO.
2-1
POWER SUPPLY MODULE TROUBLESHOOTING
2-3
3-1
REPLACEABLE PARTS LIST INDEX
3-1
