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Dolby Laboratories DA20 Installation Manual
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MODEL DA20
DIGIT
AL
FILM
SOUND PROCESSOR
Installation Manual
ISSUE 6
Part No. 91341
2
Table of Contents
Default Chapter
3
Table of Contents
3
Introduction
5
Specifications
5
About this Manual
6
Section 1 Equipment Required/Power Requirements
8
Equipment Required
8
Power Requirements
8
Regulatory Notices
8
Section 2 Initial Setup and Installation
11
Mounting the Digital Soundhead
11
Electrical Connections to the Digital Soundhead
14
Making a Custom Video Cable
15
Connection to Motor Start Relays-For 2 Projector Installations
19
Connection to Dolby Cinema Processors
20
Installation of DA20 with CP55
20
Installation of DA20 with CP65
48
Installation of DA20 with CP200
50
Installation of DA20 with CP45
88
Installation of DA20 with CP500
90
Section 3 Cat. No. 700 Digital Soundhead Alignment
92
Cat. No.700 Digital Soundhead Alignment
92
Test Setup with Oscilloscope
92
Focus Adjustment
93
Exciter Lamp Level Confirmation and Adjustment
94
Film Path Alignment
94
Optical Alignment
95
Section 4 Model Da20 Alignment
97
Cinema Processor Type Selection
97
Digital Soundhead Delay Adjustment
97
Digital Surround Delay Adjustment
97
Section 5 Theory of Operation
101
DA20 Basic Functions
101
Discussion of Changeover Technique
101
Format Control
103
Auxiliary Data Channel
105
Dolby Digital Decoder Block Diagram
105
Section 6 Operating Instructions
106
How to Identify Sound Tracks on Prints
106
Film Threading
106
Displays
107
Format Control and Auto Digital Modes
109
Auxiliary Data Channel
112
Two Projector Changeover Operation
112
Operation with an Automation System
113
Section 7 Maintenance and Adjustments
114
Digital Soundhead Maintenance
114
Print Cleanliness
115
Adjustments
115
Section 8 Unit Servicing / in Case of Difficulty
116
Troubleshooting During the Show
116
Problem Identification
117
Determining Software Revision no
120
Starting and Program Loading
121
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Dolby Laboratories DA20 Specifications
General
Manufacturer
Dolby Laboratories
Model
DA20
Bit Depth
24-bit
Power Supply
USB Bus Powered
Connectivity
USB
Outputs
Optical, Coaxial
Headphone Output
Yes
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