Crown D-150 - Table of Contents

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TABLE OF CONTENTS
SECTION
i INTRODUCTION
11
1.2
3 INSTALLATION AND OPERATION
4 CIRCUIT DESCRIPTION
41
5 SERVICE PROCEDURES
5.1
5.2
5.3
54
55
5.6
5.7
5.8
Scope of Manual
Equipment Description .
General ....
Unpacking ...
Mounting Instructions
Accessory Panel Kit Installation
Amplifier Protection. Mechanisms
Load Protection Methods
Operating Precautions ...
Connecting Output Lines
Connecting.Input-Lines .
Connecting Power ..
Operating Controls’.
Normal-Hi-Fi Installation
Cleaning. ...
Principles of Operation
introduction .....
Service Policies
Warranty...........
Disassembly for Servicing .
5.4.1. Removal of Bottom Cover, Transformer Cover and Wrap-around,
and Board and Electronics Cover -
5.42 Removal of Control Plate Assembly...
5.4.3 Replacement of Components-of Main PC-Board, 7891
5.4.4 Replacement of Input Level Potentiometers (R101, R201)
5.4.5 Replacement of Thermal Switch; SW-L..
5.4.6 Replacement of Bridge, DM-1 -....
5.4.7 Replacement of Filter Capacitors, C23 and C24
5.4.8 ...Replacement of Output-indactors;-L.102.and k202 ..
5.4.3 Replacement.of Driver and Output. Transistors
5.4.10 Replacervent of Power Transformer, 11 .
Test Equipment 000.0...
5.5.1 Calibration of Test Equipme:
Test Procedures.
Troubleshooting
5.7.1 Turr-on Procedure .
5.7.2 Qutput Offset Voltage Check .
5.7.3 Bias Level Check 0.
5.7.4 Checkout Procedure ~ 1 KHz Input, No Load .
5.7.5. Checkout Procedure — J KM2 Input; With Load
5.7.6 Checkout Procedure — Protection Circuit Tests
5.7.7 . Checkout Procedure — 20.KHz Sine Wave Input.
§.7.8 Checkout Procedure — 10 KHz Square Wave input .....
5.7.9. Checkout Procedure — IM intermodulation) Distortion Test -
5.7.10 Checkout Procedure ~ 20-20 KHz. Hunvand.Noise Test ....
5.7.11 Checkout Procedure — Quiescent AG Power Consumption
Bias Level Check and Adjustment