Dolby Laboratories CP650 User manual

Model CP650
Digital Cinema Sound
Processor
Installation Manual
Issue 2 Part No. 91569

CP650 Installation Manual
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Dolby Laboratories, Inc.
Corporate Headquarters
Dolby Laboratories, Inc.
100 Potrero Avenue
San Francisco, CA 94103-4813
Telephone [phone]
Facsimile 415-863-1373
www.dolby.com
European Headquarters
Dolby Laboratories, Inc.
Wootton Bassett
Wiltshire, SN4 8QJ, England
Telephone [phone]
Facsimile (44) 1793-842101
DISCLAIMER OF WARRANTIES: Equipment manufactured by Dolby Laboratories is warranted against defects
in materials and workmanship for a period of one year from the date of purchase. All warranties, conditions or other
terms implied by statute are excluded to the fullest extent allowed by law.
LIMITATION OF LIABILITY: It is understood and agreed that Dolby Laboratories' liability whether in contract,
in tort, under any warranty, in negligence or otherwise shall not exceed the cost of repair or replacement of the
defective components and under no circumstances shall Dolby Laboratories be liable for incidental, special, direct,
indirect or consequential damages (including but not limited to damage to software or recorded audio or visual
material), or loss of use, revenue or profit even if Dolby Laboratories or its agents have been advised, orally or in
writing, of the possibility of such damages.
Dolby, EQ Assist, Surround EX, and the double-D symbol are trademarks of Dolby Laboratories. All other trademarks remain
the property of their respective owners.
(c)2001DolbyLaboratories,Inc. All rights reserved.Issue 2
S00/13092/13640
Part No. 91569
Software Version 1.2.x.x

CP650 Installation Manual
iii
Table of Contents
List of Figures............................................................................................................... vi
List of Tables ................................................................................................................vii
Operating System Software History...........................................................................viii
Chapter 1 Introduction
1.1 About the Dolby CP650 Cinema Processor .............................................1-1
1.2 Hardware Configurations Available.........................................................1-2
1.3 Accessories...............................................................................................1-3
1.4 List of Catalog Numbers Used .................................................................1-3
1.5 Specifications............................................................................................1-3
1.6 About Dolby Digital Surround EX...........................................................1-5
1.7 List of Formats Available.........................................................................1-6
1.8 How to Identify Types of Soundtracks.....................................................1-8
1.9 Regulatory Notices...................................................................................1-9
Chapter 2 Installation
2.1 Replacing an Existing Sound System.......................................................2-1
2.1.1 Before playing the film:..............................................................2-1
2.1.2 While playing the film:...............................................................2-1
2.1.3 Disconnect the old system...........................................................2-2
2.2 Check Fuse and Bypass Mains Voltage Selector .....................................2-2
2.3 Mount the CP650......................................................................................2-3
2.4 Connect the CP650...................................................................................2-4
2.4.1 Motor Start Relays......................................................................2-4
2.4.2 Remote Controls .........................................................................2-4
2.4.3 Solar Cell Reader Boards............................................................2-5
2.4.4 Analog Nonsync Sources............................................................2-7
2.4.5 Digital Audio Sources.................................................................2-8
2.5 Exploded View and Board Locations.....................................................2-11
Wiring Diagram- Input and Control...................................................................2-12
Wiring Diagram- Audio Ouputs.........................................................................2-13
System Signal Flow Chart..................................................................................2-14
Chapter 3 Front Panel and Alignment Overview
3.1 The CP650 Front Panel.............................................................................3-1
3.2 The Setup Control Panel...........................................................................3-5
3.3 Power Supply Voltage Test Points...........................................................3-6
3.4 Aligning the B-Chain and A-Chain..........................................................3-7

CP650 Installation Manual
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Chapter 4 B-Chain Alignment
4.1 Check Theatre Equipment ........................................................................4-1
4.2 Microphone Placement.............................................................................4-2
4.3 Initial Setup...............................................................................................4-3
4.4 SPL (Sound Pressure Level) Calibration..................................................4-4
4.5 Initial Output Level Calibration ...............................................................4-5
4.5.1 Main Channels ............................................................................4-5
4.5.2 Subwoofer Channel.....................................................................4-6
4.6 Room Equalization...................................................................................4-7
4.6.1 Setting Coarse (Bulk) EQ ...........................................................4-7
4.6.2 Setting Fine EQ (1/3 octave).......................................................4-8
4.6.3 The EQ Assist Feature ..............................................................4-10
4.6.4 Setting Subwoofer Channel EQ................................................4-11
4.7 Final Output Level Calibration...............................................................4-13
4.8 Final Sound Check: Rotating Pink Noise...............................................4-16
Chapter 5 A-Chain Alignment
5.1 Overview ..................................................................................................5-1
5.2 Reverse-Scan Checkup: Projector............................................................5-2
5.3 Analog Optical Alignment: Projector.......................................................5-2
5.4 Dolby Level Set........................................................................................5-4
5.5 Film Path Alignment Check.....................................................................5-6
5.6 Cell Alignment Check..............................................................................5-7
5.7 Cell Wiring Check....................................................................................5-8
5.8 Azimuth Check.........................................................................................5-8
5.9 Focus Check .............................................................................................5-9
5.10 Optical HF Equalization (Slit-Loss EQ).................................................5-10
Chapter 6 Digital Soundheads
6.1 Mechanical Alignment .............................................................................6-1
6.2 Adjustment with Oscilloscope..................................................................6-2
6.3 Focus Adjustment.....................................................................................6-2
6.4 LED Brightness Confirmation and Adjustment .......................................6-3
Inboard Digital Readers............................................................................6-3
Chapter 7 Final Adjustments
7.1 Bypass Level Adjustment.........................................................................7-1
7.2 Setting Optical Surround Delay................................................................7-1
7.3 Setting Digital Surround Delay................................................................7-3
7.4 Setting Dolby Digital Reader Delay.........................................................7-4
7.5 Nonsync Level Adjustment......................................................................7-6
7.6 Mono Level Trim and EQ Adjustment.....................................................7-7
7.7 Preset Fader Levels...................................................................................7-8

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7.8 Assigning User Button Formats ...............................................................7-9
7.9 Assigning NS Button Format ...................................................................7-9
7.10 Reversion Mode......................................................................................7-10
7.11 Auto Surround EX Disable.....................................................................7-10
7.12 Noise Gating...........................................................................................7-11
7.13 Clock Set ................................................................................................7-11
7.14 Date set...................................................................................................7-12
7.15 Mute Fade Time Adjustment..................................................................7-12
Chapter 8 Accessories
8.1 Introduction ..............................................................................................8-1
8.2 Cat. No. 779 Remote Control Installation................................................8-2
8.3 Cat. No. 771 Remote Fader Installation...................................................8-6
Chapter 9 Maintenance and Troubleshooting
9.1 Print Cleanliness.......................................................................................9-1
9.2 Digital Soundhead Maintenance...............................................................9-1
9.2.1 Replacing the Cat. No. 701 LED Assembly ...............................9-2
9.2.2 Replacing the Cat. No. 700 Exciter Lamp ..................................9-5
9.3 CP650 Troubleshooting............................................................................9-6
9.3.1 Power Supply Voltage Ranges....................................................9-6
9.3.2 Exploded View and Board Locations .........................................9-7
9.3.3 Troubleshooting Chart ................................................................9-7
Power Supply Wiring Diagrams.........................................................................9-17
Cat. No. 701/700 Exploded Views.....................................................................9-19
Appendix A Software Operations
A.1 Updating CP650 Software.......................................................................A-1
A.2 Transferring Settings Between Two CP650s...........................................A-2
Appendix B Back Panel Connectors
Appendix C Optical Surround Level Trim
Appendix D Format Descriptions
D.1 Channel Definitions.................................................................................D-1
D.2 Format Definitions...................................................................................D-2
Appendix E External Control of CP650
E.1 Control Via RS-232 Serial Data Port ......................................................E-1
E.2 Control Via Remotes Connector..............................................................E-4
Appendix F Setup and User Menus
F.1 CP650 Setup Menu.................................................................................. F-1
F.2 CP650 User Menu ................................................................................... F-3

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List of Figures
Figure 1–1 Surround Speaker/Amplifier Switching for 5.1 and Surround EX Modes ................1-6
Figure 1–2 Photograph of Film Soundtracks................................................................................1-8
Figure 1–3 Film Soundtrack Identification ..................................................................................1-8
Figure 2–1 Main Fuse Assembly..................................................................................................2-2
Figure 2–2 Star Washers and Rack Mounting Screws.................................................................2-3
Figure 2–3 Cell Preamp Wiring Using Two 3-Conductor Shielded (screened) Cables...............2-6
Figure 2–4 Cell Preamp Wiring Using One 5- or 6-Conductor Shielded (screened) Cable ........2-6
Figure 2–5 Cell Preamp Wiring Using Two 2-Conductor Shielded (screened) Cable ................2-7
Figure 2–6 Cell Preamp Wiring Using One 4-Conductor Shielded (screened) Cable.................2-7
Figure 2–7 Cat. No. 794 AES/EBU and S/PDIF Jumper Selections............................................2-8
Figure 2–8 Model CP650 Exploded View .................................................................................2-11
Figure 3–1 Front Panel Controls ..................................................................................................3-1
Figure 3–2 Front Panel Display....................................................................................................3-2
Figure 3–3 Fader Characteristic ...................................................................................................3-3
Figure 3–4 CP650 Operation and Setup Menu Control Buttons..................................................3-4
Figure 3–5 Setup Control Panel....................................................................................................3-5
Figure 3–6 Power Supply Voltage Test Points.............................................................................3-6
Figure 4–1 EQ Microphone Placement ........................................................................................4-2
Figure 4–2 EQ Assist Operating Range .....................................................................................4-10
Figure 6–1 Digital Soundhead Adjustments.................................................................................6-1
Figure 6–2 Digital Video Oscilloscope Image – Focus Adjustment............................................6-3
Figure 6–3 Cat. No. 701 LED Brightness Adjustment.................................................................6-3
Figure 8–1 Cat. No. 779 Remote Control Functions....................................................................8-2
Figure 8–2 Location to Drill Wiring Hole on Remote Control....................................................8-3
Figure 8–3 Remote Control Circuit Board Connector..................................................................8-3
Figure 8–4 Remote Control SW1 Address Switch Location........................................................8-4
Figure 8–5 Connection of Remotes to the CP650........................................................................8-5
Figure 9–1 Digital/Analog Track Wear........................................................................................9-1
Figure 9–2 Cat. No. 701 LED Assembly Mounting Screws ........................................................9-2
Figure 9–3 Cat. No. 701 LED Assembly Wiring.........................................................................9-2
Figure 9–4 Cat. No. 701 LED Assembly Initial Gap Setting.......................................................9-2
Figure 9–5 Scope Display of CP650 Video Test Point Signal.....................................................9-4
Figure 9–6 Adjust Cat. No. 701 LED Assembly for Optimum Video Signal..............................9-4
Figure 9–7 Cat. No. 701 LED Drive Current Setting...................................................................9-4
Figure 9–8 Cat. No. 700 Digital Soundhead Exciter Lamp Replacement....................................9-5
Figure 9–9 Power Supply Voltage Test Points.............................................................................9-6
Figure 9–10 Model CP650 Exploded View .................................................................................9-7

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List of Tables
Table 1–1 Formats Supported by the CP650................................................................................1-6
Table 2–1 Solar Cell Preamp Board Connectors..........................................................................2-5
Table 2–2 Examples of AES/EBU ↔
↔↔
↔S/PDIF Adapters Available...........................................2-10
Table 7–1 Surround Delays Based on Theatre Dimensions in Feet.............................................7-3
Table 7–2 Surround Delays Based on Theatre Dimensions in Meters.........................................7-4
Table 7–3 Typical Delay Settings for Dolby Digital Readers......................................................7-5
Table 7–4 Typical Delay Settings for Built-in Digital Readers ...................................................7-5
Table 9–1 Main Power Supply Voltage Ranges...........................................................................9-6
Table 9–2 Bypass Power Supply Voltage Ranges........................................................................9-6
Table B–1 Main Audio Output Connector Pinout.......................................................................B-1
Table B–2 Option Card I/O Connector with Cat. No. 794 Installed...........................................B-2
Table B–3 Dolby Digital Reader Input Connector Pinout ..........................................................B-3
Table B–4 Motor Start Connector Pinout....................................................................................B-4
Table B–5 Optical Input Connector Pinout.................................................................................B-4
Table B–6 MIC Input Connector Pinout .....................................................................................B-4
Table B–7 Mic Mux Connector...................................................................................................B-5
Table B–8 Remote Unit and Remote Fader Connector Pinout ...................................................B-5
Table B–9 Six-Channel Analog Input Connector Pinout............................................................B-6
Table B–10 Automation I/O Connector Pinout...........................................................................B-7
Table B–11 Automation I/O Connector Pins Used for Noise Gating .........................................B-8
Table B–12 Serial Data (RS-232) Connector Pinout...................................................................B-8
Table D–1 Channel Definitions...................................................................................................D-1
Table D–1 Format Characteristics Chart.....................................................................................D-8

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CP650 Operating System Software History
V1.0.4.4
•First product shipments.
•Covered in installation manual issue 1.
V1.1.3.0
•Added support for Cat. No. 794 card: Dolby Digital Surround EX decoder and
AES/EBU input for stereo PCM or Dolby Digital bitstreams from consumer
products.
•Covered in installation manual addendum, part number 91743.
V1.1.5.0
•Added support for Cat. No. 779 remote control unit and Cat. No. 771 remote
fader unit. Covered in remotes installation manual, part number 91733.
V1.1.7.0
•Added support for formats 92 and 93: Dolby SR input selections. Covered in
format definitions document on CD-ROM.
V1.2.x.y (X, Y may be any number)
•Added support for Auto Dolby Digital Surround EX switching, external
control via the RS-232 serial data port, and the rotating pink noise feature.
•These features, along with the EQ Assist®function, plus all of the above
updates are covered in this installation manual.

CP650 Installation Manual
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Chapter 1
Introduction
1.1 About the Dolby CP650 Cinema Processor
The Dolby CP650 is a self-contained, all-digital cinema processor capable of
supporting Dolby Digital, Dolby Digital Surround EX, Dolby SR, Dolby A-type, and
Academy mono film sound playback.
The CP650 provides inputs for two projector soundheads (both analog and digital), an
external six-channel processor, two nonsync sources, and a PA microphone. Its audio
outputs are balanced, with a multipin connector configured to the THX standard. The
CP650 is the first cinema processor to incorporate an Ethernet connection, enabling
theatre personnel to monitor the unit’s functions remotely from a PC.
For decoding analog soundtracks, the CP650’s state-of-the art design incorporates the
only digital implementations of Dolby A-type and Dolby SR decoding to meet Dolby
Laboratories’ own rigorous standards. Reductions in the cost of powerful DSP
circuitry have made it possible for the first time to replace the analog circuitry
previously necessary for the accurate reproduction of A-type and SR soundtracks.
An easy-to-read LCD screen, plus simple front-panel format selection and control
buttons make it easy to install, operate, and maintain the CP650. Installation is further
simplified by built-in test instrumentation that includes a real-time analyzer. Third-
octave equalization, plus bass and treble trim controls, are provided for up to seven
channels (Left, Center, Right, Left Surround, Right Surround, Back Surround Left,
and Back Surround Right). A digital parametric equalizer is provided for subwoofer
equalization.
Easily-programmed internal software manages most existing or likely future formats.
While an external PC is not required for setup, a full-featured software package is
available in a variety of languages to facilitate the setup process. A serial connector
for a PC, an input for a calibration microphone multiplexer, and a variety of test
points are all accessible behind an access door on the front panel. Built-in diagnostic
software runs automatically whenever the CP650 is turned on.
Calibration settings for a given theatre can be stored on a PC, and, if necessary,
transferred directly to another CP650, or other modules, minimizing the need for
additional calibration after repairs. As improvements to the CP650 digital control and
processing software are developed, the latest revisions will be downloadable from a
PC to the CP650. Updates to the digital processing used for Dolby Digital
soundtracks are included from time to time on Dolby Digital release prints, and
download automatically into the CP650 the first time such a print is played in the
cinema.

CP650 Installation Manual Introduction
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The standard Model CP650 includes a Cat. No. 794 plug-in module featuring Dolby
Digital Surround EX decoding capability plus an AES/EBU digital input
accommodating stereo PCM audio and Dolby Digital (consumer) bitstreams.
Options available for the CP650 include a remote fader (Cat. No. 771), and a remote
unit duplicating many of the CP650 front panel controls (Cat. No. 779).
1.2 Hardware Configurations Available
The CP650 is available in three versions:
Model CP650
•Dolby Digital soundtrack decoding capability
•Dolby A-type and SR analog soundtrack decoding capability
•Dolby Digital Surround EX decoding and AES/EBU digital input
•Six-channel analog input
Model CP650D
•Dolby Digital soundtrack decoding capability
•Dolby A-type and SR analog soundtrack decoding capability
•Six-channel analog input
•Upgradable to Dolby Digital Surround EX decoding and AES/EBU digital
input by installing upgrade kit UEX/650, which includes a Cat. No. 794 plug-
in circuit board.
Model CP650SR
•Dolby A-type and SR analog soundtrack decoding capability
•Six-channel analog input
•Upgradable to Dolby Digital soundtrack decoding by adding upgrade kit
UD/650, which includes a Cat. No. 773 plug-in circuit board.
•Upgradable to Dolby Digital Surround EX decoding and AES/EBU digital
input by adding upgrade kits UD/650 and UEX/650, which includes a
Cat. No. 794 plug-in circuit board.