Table Of Contents - Crown D-150 Service Manual

Table of Contents

Table Of Contents2
List Of Illustrations3
Introduction4
Equipment Description4
Specifications5
Installation And Operation6
General6
Unpacking6
Mounting Dimensions6
Mounting Instructions7
Accessory Panel Kit Installation7
Amplifier Protection Mechanism7
Panel Kit Mounting7
Load Protection Methods8
Fuel Selector Nomograph8
Peak Power Limiting Compressor With Overdrive Indicator8
Operating Precautions9
Connecting Output Lines9
Rear View Of Chassis9
Connecting Input Lines10
Schematic Of Earphone Pad10
Schematic For Full Range Electrostatic Speaker Connmection10
Connecting Power11
Source Resistance11
Graph For Selection Of Input Capacitor11
Operating Controls14
Line Voltage Connections14
Low-Pass Filters For Severe Rf At Inputs14
Typical Hi-Fi Installation15
Normal Hi-Fi Installation16
Cleaning16
Circuit Description17
Principles Of Operation17
Service Procedures18
Service Policies18
Disassembly For Servicing18
Removal Of Control Plate Assembly19
Replacement Of Components On Main Pc Board19
Replacement Of Thermal Switch19
Replacement Of Bridge19
Replacement Of Output Inductors20
Replacement Of Power Trasnformer20
Replacement Of Driver And Output Transistors20
Test Equipment21
Calibration Of Test Equipment21
Test Procedures21
Noise Test Setup23
Im Distortion Test Setup23
Typical Test Bench Setup23
Troubleshooting24
Turn-On Procedures24
Visual Inspection24
Output Offset Voltage Check25
Bias Level Check25
Checkout Procedure25
Distortion Test27
Sine Wave Input27
Square Wave Input27
Hum And Noise Test27
Quiescent Ac Power Consumption28
Bias Level Check And Adjustment28
Schematics, Parts Lists And Component Location29
Power Supply30
Audio Power Amplifier31
Schematic Diagram, D-150 Amplifier31
Chassis Assembly, Exploded View32
Output Inductor Assembly, Exploded View35
Control Plate Assembly, Exploded View36
Application Notes37
Needs Of A Load38
Mono Conversion39
Wire Changes39
Pa Adapter Panel Installation41
Front View Of P-A Adapter Panel41
Rear View Of P-A Adapter Panel41
P-A Adapter Filter Response41