Dolby Laboratories DA20 Manuel d'instructions télécharger pdf (Page 4)

INTRODUCTION

Thank you for purchasing the Dolby Model DA20 Digital Film Sound Processor. It

combines the high performance for which all processors manufactured by Dolby

Laboratories are well known with the latest digital technology to decode the Dolby

Digital print format.

About this manual

This User’s Manual has been prepared specifically to help theater personnel get the most

from the Model DA20 and Cat. No.700 Digital Soundhead after proper installation.

Installation should be attempted only by qualified personnel. Installation and alignment

instructions are provided in a separate manual. We suggest that you keep this manual

readily available for quick reference.

The manual is organized as follows:

• Section 1, Operating Instructions, covers the basic control and indicator functions of

the DA20, and is all you need to get the show started.

• Section 2, Maintenance and Adjustments, contains tips for maintaining the DA20 and

the Cat. No.700 Soundhead in your theater system.

• Section 3, Troubleshooting, will help you track down problems in the digital sound

system without test equipment. It consists of procedures to follow to isolate and fix

simple problems.

• Appendix A contains circuit board location information.

For the sake of clarity, boldface type is used for all specific references to DA20 controls

and indicators and their labels, such as Digital Signal Level, and CP Status. CP refers to

Cinema Processor. In addition, indicator lights on the DA20 are referred to in the text as

LEDs (Light-Emitting Diodes).

About the Dolby DA20 and the Dolby Stereo Digital Format

The Dolby Model DA20 enables Dolby models CP45, CP55, CP65, CP200 and CP500

Cinema Processors to play the Dolby digital soundtrack format.

The Digital Film Sound System consists of a Cat. No.700 Digital Soundhead with cables

and the Model DA20 Digital Film Sound Processor. An additional Cat. No.700 Digital

Soundhead may be added for use in two projector changeover systems. The soundhead is

a mechanical assembly which provides a stable film path, and uses a CCD array to scan

digital data from a digital print. The DA20 decodes the scanned digital soundtrack into

six channels of high quality audio.

Among the features of the DA20 are:

• Automatic format selection between a Dolby digital track and the conventional analog

SR track.

• Display of digital signal level.

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Dolby Laboratories DA20 Manuel d'instructions Page 4