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J.W. Davis & Company 

•  3030 Canton Street  •  P.O. Box 710219  •  Dallas, Texas 75371-0219

Sales 800-527-5705 • Fax 800-388-9106 • Corp 214-651-7341 • Fax 214-939-0328 • [email protected] • www.jwd.com

D-500A POWER AMPLIFIER

USER’S MANUAL

The Mark of the Professional...

090705124

Unpacking Procedures

The Back Panel

Specifications

The Auto-Mute Circuit

Troubleshooting

The Front Panel

Maintenance

Installation Information

Speaker Installation

Using Horn Speakers

Product Overview

Schematic

Product Description

Warranty & Service

Accessories

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Summary of Contents for D-500A

Page 1: ...jwd com www jwd com D 500A POWER AMPLIFIER USER S MANUAL The Mark of the Professional 090705124 Unpacking Procedures The Back Panel Specifications The Auto Mute Circuit Troubleshooting The Front Panel...

Page 2: ...TION These deviced are not intended for use in hazardous locations as defined by the National Electrical Vode NEC and by the National Fire Protection Association NFPA WARNINGS Features Rack mount stan...

Page 3: ...uxiliary input and set the controls for operation If the unit should be inoperable and no damage is noted please contact J W Davis Company s Customer Service Department for directions 800 527 5705 III...

Page 4: ...system 6 AC LINE CORD Three conductor line cord for AC supply voltage 5 AC CONVENIENCE OUTLET Grounded outlet to run additional equipment 2 amp maximum 2 INPUT PATCH These are two high impedance input...

Page 5: ...rn speakers are being used the low cut filter must be activated to protect them To enable the low cut circuit follow these steps 1 On the same board as the VOX Mute look for a tagged jumper that reads...

Page 6: ...breaker If the unit is overloaded e g too many speakers shorted speaker line mismatched line impedance e g 8 ohm speaker on 70 7V line or overheated e g obstructed or poor ventilation of the unit mism...

Page 7: ...ficient 600 ohm Tel Page gain Check that the internal muite jumper is not disabled See page 7 Check 600 ohm Tel Page gain control setting recessed on back Low High or Distorted Level Volume setting Si...

Page 8: ...SCHEMATIC FOR D 500A AMPLIFIER...

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