Crown ce 4000 Service Manual

POWER AMPLIFIER
SERVICE MANUAL
130485-1
11/02
Rev. B
© 2002 by Crown Audio, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone:
574-294-8000. Trademark Notice: Amcron
®
and Crown
®
are registered trademarks of Crown
International. Other trademarks are the property of their respective owners.
CE Series
CE 4000
Some models may be exported under the name Amcron
®

Crown ce 4000 Specifications

General

Channels	2
Power Output (8 Ohms Bridged)	2000W
Total Harmonic Distortion	< 0.5%
Input Sensitivity	1.4V
Input Impedance	20 kOhms balanced, 10 kOhms unbalanced
Power Output (4 Ohms)	1000W
Frequency Response	20Hz - 20kHz
Protection	Short circuit, thermal, overload

Summary

Introduction

1.1 Introduction

Provides service information for the Crown CE 4000 amplifier.

1.2 The CE 4000 Amplifier

Describes the CE 4000 as a professional, compact audio amplifier.

1.3 Scope

Defines the manual's applicability to all CE 4000 amplifier versions.

1.4 Warranty

Covers basic warranty policies and customer service procedures.

Theory of Operation

3.1 Audio Signal Path

Explains the audio signal's journey through the amplifier's internal circuits.

3.2 Protection and Control Circuitry

Details protection circuits, control functions, and indicators like Fault and Clip LEDs.

3.3 Power Supply Operation

Describes the power entry, filtering, low-voltage supplies, PFC, and isolation stages.

Maintenance

4.1 Where to Begin

Outlines a three-step process for effective repair: symptom determination, cause identification, and repair.

4.2 Surface Mount Technology

Discusses the advantages and disadvantages of Surface Mount Technology (SMT) in amplifier design.

4.3 Disassembly for Inspection & Service

Provides instructions for safely disassembling the amplifier for inspection and service.

4.4 Troubleshooting

Guides on identifying and repairing common amplifier problems based on symptoms and causes.

4.5 Required Test Equipment

Lists essential test equipment required for accurate calibration and servicing of the amplifier.

4.6 Electrical Checkout Procedures

Details electrical tests to verify amplifier operation and performance parameters.

4.7 Calibrations

Describes procedures for calibrating specific amplifier functions like filters and sensors.

Parts

5.1 General Information

General guidance on ordering replacement parts from the Crown Parts Department.

5.2 Ordering and Receiving Parts

Details the process for ordering parts, including required information and payment terms.

5.3 Mechanical Parts

Lists mechanical components and assemblies with part numbers and exploded view references.

5.4 Circuit Board Parts

Lists circuit board part numbers and their corresponding schematic sheet references.