Crown K1 Service Manual

K Series Service Manual
Rev. A
©1999 Crown International, Inc.
Table of Contents
IV
1 Introduction ............................................................................ 1-1
1.1 Introduction...................................................................... 1-1
1.1.1 The K Series Amplifiers ........................................... 1-1
1.2 Warranty........................................................................... 1-1
1.3 Repair Strategy ................................................................ 1-2
1.4 Service Procedure ........................................................... 1-2
2 Specifications ......................................................................... 2-1
2.1 Performance .................................................................... 2-1
2.2 Controls............................................................................ 2-1
2.3 Indicators ......................................................................... 2-1
2.4 Input/Output..................................................................... 2-2
2.5 Output Signal ................................................................... 2-2
2.6 Protection......................................................................... 2-2
2.7 Construction..................................................................... 2-2
3 Theory...................................................................................... 3-1
3.0 Overview .......................................................................... 3-1
3.1 Power Supplies ................................................................ 3-1
3.1.1 Main Power Supply.................................................. 3-1
3.1.2 Low Voltage Supplies .............................................. 3-1
3.2 Input Stage ...................................................................... 3-2
3.3 DC Servo.......................................................................... 3-2
3.4 Sleep Circuit .................................................................... 3-2
3.5 Error Amp......................................................................... 3-2
3.6 Modulator......................................................................... 3-2
3.7 Triangle Generator ........................................................... 3-3
3.8 Proportional Vcc Generator ............................................. 3-3
3.9 Output .............................................................................. 3-3
3.10 Output Filter ................................................................... 3-3
3.11 Current Limiter ............................................................... 3-3
3.13 Overlap Correction and Adjustment .............................. 3-4
3.14 Display Circuitry............................................................. 3-4
3.15 Control Circuitry ............................................................. 3-4
3.16 Crowbar Circuitry ........................................................... 3-5
4 Line Voltage Conversion ........................................................ 4-1
4.1 Line Voltage Conversion .................................................. 4-1
5 Maintenance............................................................................ 5-1
5.1 Where to Begin ................................................................ 5-1
5.2 Disassembly for Inspection & Service ............................. 5-1

Crown K1 Specifications

General

Brand	Crown
Model	K1
Category	Amplifier
Language	English