Dolby Laboratories CP650 Installation Manual
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Dolby Laboratories CP650 Installation Manual

Dolby Laboratories CP650 Installation Manual

Digital cinema sound processor
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Model CP650
Digital Cinema Sound
Processor

Installation Manual

Issue 2
Part No. 91569

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  • Page 1: Installation Manual

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

  • Page 3: Table Of Contents

    Table of Contents List of Figures....................... vi List of Tables ........................vii Operating System Software History................viii Chapter 1 Introduction About the Dolby CP650 Cinema Processor ..........1-1 Hardware Configurations Available............1-2 Accessories ....................1-3 List of Catalog Numbers Used ..............1-3 Specifications....................1-3 About Dolby Digital Surround EX............1-5 List of Formats Available .................1-6...
  • Page 4 LED Brightness Confirmation and Adjustment ........6-3 Inboard Digital Readers................6-3 Chapter 7 Final Adjustments Bypass Level Adjustment.................7-1 Setting Optical Surround Delay..............7-1 Setting Digital Surround Delay ..............7-3 Setting Dolby Digital Reader Delay............7-4 Nonsync Level Adjustment ..............7-6 Mono Level Trim and EQ Adjustment.............7-7 Preset Fader Levels...................7-8...
  • Page 5 Appendix C Optical Surround Level Trim Appendix D Format Descriptions Channel Definitions.................D-1 Format Definitions...................D-2 Appendix E External Control of CP650 Control Via RS-232 Serial Data Port ............E-1 Control Via Remotes Connector.............. E-4 Appendix F Setup and User Menus CP650 Setup Menu.................. F-1...

  • Page 6: List Of Figures

    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.
  • Page 7 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 ..................

  • Page 8: Operating System Software History

    • 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.

  • Page 9: Chapter 1 Introduction

    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.

  • Page 10: Hardware Configurations Available

    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).

  • Page 11: Accessories

    (or multiplexer), 15 V phantom power switchable via front-panel DIP switch. Rear-panel XLR and front-panel 9-pin D-connector. AES/EBU digital input: Accommodates stereo PCM audio at 48, 44.1, or 32 ksps. Also accepts Dolby Digital or Dolby E bitstreams. Input via 25-pin D-connector, 110Ω ±20 %, balanced. Main Eight-Channel Signal Outputs Balanced, output impedance: 100Ω...
  • Page 12 L, C, R, Ls, Rs, Bsl, Bsr: 27-band digital 1/3-octave, plus bass and treble control. SW: digital parametric with 12 dB cut capability. Distortion Typically 0.005% in Dolby SR mode (output –10 dBu, input 10 dB over Dolby level). Dynamic Range Typically 99 dB with fader set to 7.

  • Page 13: About Dolby Digital Surround Ex

    Introduction About Dolby Digital Surround EX Dolby Digital Surround EX adds a third surround channel to digital film sound, a concept first envisioned by sound designers at Lucasfilm’s Skywalker Sound post- production facility. Jointly developed by Dolby Laboratories and Lucasfilm THX, Dolby Digital Surround EX gives sound mixers a new level of creative freedom.

  • Page 14: List Of Formats Available

    Figure 1–1 Surround Speaker/Amplifier Switching for 5.1 and Surround EX Modes List of Formats Available The formats supported by the CP650 are listed below. See Appendix D for complete definitions of each format. Table 1–1 Formats Supported by the CP650...
  • Page 15 CP650 Installation Manual Introduction Table 1–1, continued Formats Supported by the CP650 Format Description Dolby Digital Surround EX Film Short name: Surround EX 35 mm Magnetic, L, C, R 3-Channel Short name: 3-Channel Mag 35 mm Magnetic, 4-Channel Short name: 4-Channel Mag 70 mm Dolby A-type Mag.

  • Page 16: How To Identify Types Of Soundtracks

    However, with handling, the identification may be lost. If neither is available, close inspection of the film itself will help distinguish the various types. Digital data blocks are printed between the perforations on the side of the film next to the analog (Dolby SR) track.

  • Page 17: Regulatory Notices

    CP650 Installation Manual Introduction Regulatory Notices 1.9.1 This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 18 CP650 Installation Manual Introduction 1.9.5 Notices for Europe This equipment complies with the EMC requirements of EN55103-1 and EN55103-2 when operated in an E2 environment in accordance with this manual. IMPORTANT SAFETY NOTICE This unit complies with the safety standard EN60065. The unit shall not be exposed to dripping or splashing and no objects filled with liquids, such as coffee cups, shall be placed on the equipment.

  • Page 19: Chapter 2 Installation

    CP650 is being aligned. Replacing an Existing Sound System If the CP650 replaces an existing cinema sound system, play a typical film before you remove the old system so you will have a benchmark for comparison to the new system.

  • Page 20: Disconnect The Old System

    Check Bypass Supply Mains Voltage Setting The bypass power supply mains voltage selector switch is accessible through a hole in the top cover of the CP650. Use a screwdriver to set the switch to either 120 or 220 VAC. Figure 2-8 shows the switch location.

  • Page 21: Mount The Cp650

    Locate the power amplifiers away from the CP650 to avoid hum pickup problems. Always leave a 1U (1.75", 43 mm) space above and below the CP650 to provide adequate ventilation. Install an air guide or baffle to deflect hot air from equipment below the CP650.

  • Page 22: Connect The Cp650

    Motor Off: Greater than 3.5 Vdc, less than 18 Vdc. If the CP650 is to be used in a platter operation (single projector), a jumper must be installed. A pre-wired connector is installed at the factory for this purpose. 2.4.2...

  • Page 23: Solar Cell Reader Boards

    There must be a connection between the ground pins at the Cat. No. 655 solar cell circuit board and the audio common in the CP650. This connection must not use the shield of the optical input cable, since doing so may impose RF energy on the CP650 ground system.

  • Page 24: Figure 2-3 Cell Preamp Wiring Using Two 3-Conductor Shielded (Screened) Cables

    CP650 Installation Manual Installation – CP650 Out 1+ Optical In Shield Out 1– – Out 2+ Out 2– Shield Cat.No.655 Wiring Diagram Ground wire on pin 5, OPTIONAL Ground wire on pin 2, REQUIRED +Vdd Shield – Figure 2–3 Cell Preamp Wiring Using Two 3-Conductor Shielded (screened) Cables CP650 –...

  • Page 25: Analog Nonsync Sources

    2.4.4 Analog Nonsync Sources The CP650 has two sets of analog nonsync inputs, designated nonsync 1 (Format 60), and nonsync 2 (Format 61). The input impedance is 11 kΩ. They both have a wide range of input level adjustment, but to further extend the possible range of input levels, the two sets of inputs have different gain adjustment ranges: •...

  • Page 26: Digital Audio Sources

    2.4.5 Digital Audio Sources With a Cat. No. 794 board installed, the CP650 is capable of handling input bitstreams from a digital audio source. Possible digital sources include a CD player, DVD player, satellite television receiver, HDTV receiver, or HD video player. The digital input format (Format 80) must be assigned to one of the user-definable format buttons U1, U2, or NS.
  • Page 27 CP650 Installation Manual Installation Interface Standards for Digital Audio There are two interface types for digital inputs using copper conductors (non-optical links): AES/EBU and S/PDIF. Even though there are differences in the connectors used and the interface impedance, the format of the bitstream is generally the same.

  • Page 28: Table 2-2 Examples Of Aes/Ebu ↔ S/Pdif Adapters Available

    It may seem to work, but the results will prove unreliable and dropouts will occur. With one digital audio input on the CP650, it may seem difficult to switch between multiple units that use different digital output standards. It is actually easy to convert from one interface to the other.

  • Page 29: Exploded View And Board Locations

    110 VAC: T 200 MA L 220 VAC: T 100 MA L Power / Bypass Button Front Panel Mounting Screw Figure 2–8 Model CP650 Exploded View Disassembly steps can be found in the troubleshooting section of this manual. See Chapter 9, section 9.3.2. 2-11...
  • Page 30 75 pF per meter. For two conductor with shield wiring, use Belden 8451 All shields must be connected to the CHASSIS of the CP650. 2-conductor shielded cable or equivalent: tinned copper, This achieves the required RF interference immunity. A metal...
  • Page 31 Subwoofer Notes: Follow all local electrical and building codes. All shields must be connected to the CHASSIS of the CP650. This achieves the required RF interference immunity. A metal Use grounded (earthed) conduit wherever possible. Avoid housing must be used for all D-connectors and the shields routing signal wiring near electric motors, rectifiers, power must be connected to the housing.
  • Page 32 CP650 Installation Manual Installation Bypass Bypass Output Fader Level (EEPOT) Digital Card (Trimpot) Slit-Loss Matrix B-Chain Proj 1 Optical EQ and Decoder Preamp 2-Ch Noise with Reduction Proj 2 EEPOTS 6-Ch 6-Ch 2-Ch EPOT Level Audio Bypass Option 6-Ch Balanced...

  • Page 33: Chapter 3 Front Panel And Alignment Overview

    Dolby cinema equipment. It is useful to develop an understanding of why the CP650 is aligned as described in this manual. If the installer is already familiar with the CP650 and these principles, or is in a hurry to complete the installation, this chapter may be read later.

  • Page 34: Figure 3-2 Front Panel Display

    0 and 8. With a correctly aligned digital reader, most films will play at an error rate of 6 or lower. If the error rate is above 8, the CP650 will revert to analog soundtrack playback and no error rate number will be displayed.

  • Page 35: Figure 3-3 Fader Characteristic

    This indicator appears if a problem is detected in the bypass power supply circuitry. Power Supply Button This button operates the main power supply for the CP650. As with other Dolby cinema processors, the CP650 utilizes a separate backup (bypass) power supply. A red LED built into the switch is activated when the unit is powered from the bypass supply.

  • Page 36: Figure 3-4 Cp650 Operation And Setup Menu Control Buttons

    The right-hand OK button is used to accept the setting displayed on the front panel screen and store it in CP650 memory. Any changes to settings will occur immediately, but will not be saved until this button is pressed. Leaving the current menu before pressing the button will cause the change to be discarded.

  • Page 37: The Setup Control Panel

    Setup Mode data port. Windows-based set-up software is available for aligning the CP650. This connector is duplicated on the rear panel of the CP650. Dip Switch Connect a microphone multiplexer here or to the rear panel MIC INPUT connector. Wakeup...

  • Page 38: Power Supply Voltage Test Points

    These test points are provided to allow rapid access to the required signals used during CP650 setup. Each test point is a 2-mm diameter female socket that accepts a 2-mm male test pin. Test point pins can be obtained in the USA from ITT Pomona ®...

  • Page 39: Aligning The B-Chain And A-Chain

    The output of the selected microphone is fed to a real time analyzer (RTA) circuit built into the CP650 cinema processor (or to your separate RTA if you prefer.) Equalization can be performed by using an oscilloscope connected to the RTA output test points or by using a PC running Dolby setup software.
  • Page 40 3 dB per octave above 2 kHz. This characteristic is used to define the standard steady-state response curve for all dubbing theatres in which films with Dolby soundtracks are mixed and for all Dolby processor-equipped cinemas. The size of the theatre affects the reverberation time, and therefore the measurement of frequency response.

  • Page 41: Chapter 4 B-Chain Alignment

    CP650 Installation Manual Chapter 4 B-Chain Alignment Check Theatre Equipment Thoroughly check the loudspeakers and power amplifiers for any sources of poor performance, using the suggested checklists below as a guide. Speakers • Loudspeaker cables – Check that they are in good condition and that they are the correct gauge for the impedance of the speakers and the length of the run.

  • Page 42: Microphone Placement

    45° upward towards the screen. Route the output cable to the CP650 and connect it to the microphone connector on the rear panel or front setup panel (XLR on the rear panel or 9 pin D-connector “MIC MUX”...

  • Page 43: Initial Setup

    Caution: The following steps will cause the CP650 to output pink noise to the power amplifiers. The CP650 output levels may be set too high. If you are unsure of the settings on your unit, turn off the power amplifiers before selecting the “Calibrate SPL” menu item shown in Section 4.4 below. Then, select and observe the present output level adjustment settings.

  • Page 44: Spl (Sound Pressure Level) Calibration

    Press the OK button. Wait while the system automatically calibrates to the room reading. Note: The calibration is retained in CP650 memory and can be used Please Wait... in future alignments. However, it is advisable to recalibrate the Calibrating..

  • Page 45: Initial Output Level Calibration

    >Level: xx Room Level xx.x dB Rotate the main fader knob to change the CP650 pink noise output signal level into the auditorium while watching the measured Room Level shown on the bottom line of the display. Set it to 85 dB.

  • Page 46: Subwoofer Channel

    Ls and Rs = 82 dB or (Ls, Bsl, Bsr, Rs channels if your unit is equipped Ls, Bsl, Bsr, Rs = 82 dB with Dolby Digital Surround EX) to 82 dB. menu When all channels have been adjusted, press the right-hand OK button.

  • Page 47: Room Equalization

    Room Equalization Room equalization is performed using the real-time analyzer (RTA) circuit built into the CP650 along with an oscilloscope for RTA display. The adjustments for the five full-range channels involves two steps: coarse, or “bulk,” adjustment using bass and treble controls, and fine adjustment, using a 27-band equalizer.

  • Page 48: Setting Fine Eq (1/3 Octave)

    CP650 Installation Manual B-Chain Alignment Press the center menu button to move cursor down to Treble Adjust: Bulk EQ Ch.: Center Bass Adjust:±x.x dB >Treble Treble Treble Adj Treble Adj: ±x.x dB Corner Freq: x kHz Slowly move the front panel knob to adjust the high- frequency response as close as possible to the reference line displayed on the RTA.
  • Page 49 -__--_-- small marker on the scope trace shows the frequency band selected. Turn the front panel knob (with no button pressed) to select the active band. The CP650 screen cursor (line) blinks to indicate which band is active. When the front panel knob is rotated to select frequencies at the far left (or right) side of the LCD screen, the displayed bands will “scroll”...

  • Page 50: The Eq Assist Feature

    CP650 Installation Manual B-Chain Alignment Saving Changes..When the desired response for this channel has been achieved, press the right-hand OK button to save the settings. Press the left menu button once, then move the front panel knob to select the next channel to be equalized.

  • Page 51: Setting Subwoofer Channel Eq

    CP650 Installation Manual B-Chain Alignment 4.6.4 Setting Subwoofer Channel EQ menu Press the left menu button twice to move to the Subwoofer EQ screen. Equalization facilities for the subwoofer channel are Subwoofer EQ Subwoofer EQ Subwoofer EQ Subwoofer EQ different than for the other channels. This process is >...
  • Page 52 CP650 Installation Manual B-Chain Alignment menu Press the center menu button to move the cursor to Frequency:, then rotate the front panel knob. A dip in the frequency response will move along the Frequency frequency axis of the scope RTA display.

  • Page 53: Final Output Level Calibration

    CP650 Installation Manual B-Chain Alignment Final Output Level Calibration Now that room equalization is complete, the sound pressure level in the theatre can be set accurately. Main Channels If a microphone multiplexer is being used, select MIC 1. MIC 1...
  • Page 54 CP650 Installation Manual B-Chain Alignment Optical Subwoofer Bandwidth This menu item sets upper frequency limit of the subwoofer channel to either 50 or 100 Hz. The recommended setting depends on the type of screen speakers in your cinema. If you have direct radiator type screen speakers, set the bandwidth to 50 Hz.
  • Page 55 CP650 Installation Manual B-Chain Alignment Subwoofer Speaker Polarity Check Using the center menu button, move the cursor to Optical Subwoofer Level: xx Center Noise, then rotate the front panel knob to On. Polarity: Normal >Center Noise: On Press the center menu button to move the cursor to...

  • Page 56: Final Sound Check: Rotating Pink Noise

    1 2 3 4 5 6 8 Slide DIP switch 6 down to the normal position. The CP650 will switch to normal operation with the user’s menu choices available. menu Press the left menu button multiple times to move the display to the Rotating Pink Noise screen.

  • Page 57: Chapter 5 A-Chain Alignment

    Dolby processing circuits. The A-Chain optical level is calibrated with the Cat. No. 69T Dolby Tone test film. This film is used to establish the correct Dolby operating level within the CP650.

  • Page 58: Reverse-Scan Checkup: Projector

    CP650 Installation Manual A-Chain Alignment Reverse-Scan Checkup: Projector Clean the optical surfaces with a cotton swab moistened with glass cleaner. Inspect the film guides for evidence of cuts, cracks, surface defects, or any foreign materials that could impair smooth film guiding.
  • Page 59 Confirm that the cell wiring and connections are correct. Shielded cables must be used. The inner conductors must be wired to the CP650 OPTICAL input connectors exactly as shown on the wiring diagram foldout.

  • Page 60: Dolby Level Set

    Thread and play a Dolby Tone test film, Cat. No. 69T on projector 1. The film emulsion should face away from the screen. Verify that the signal present LEDs on the CP650 setup panel are on. The Dolby tone signal should be visible on the oscilloscope.
  • Page 61 CP650 Installation Manual A-Chain Alignment Press the OK button to begin Manual adjustment. The number displayed on the bottom line represents the level setting for Left channel. The Manual L O O R four vertical circles display the Left channel Level signal level, similar to an LED meter.

  • Page 62: Film Path Alignment Check

    CP650 Installation Manual A-Chain Alignment Press the OK button to save the level settings for Projector 2, left and right channels. Saving Changes..Film Path Alignment Check Connect the oscilloscope to the Lt and Rt test 1 2 3 4 5 6 8 SIGNAL points.

  • Page 63: Cell Alignment Check

    CP650 Installation Manual A-Chain Alignment The adjustment is correct when there is no signal output while the film is running. It may not be possible to adjust for a null with some older slits; in such instances, adjust for a minimum and equal signal on L and R.

  • Page 64: Cell Wiring Check

    Rt Signal Present LED on the CP650 setup panel. If the film path, optics, or LED / exciter lamp were adjusted, repeat the previous film path alignment and cell alignment steps.

  • Page 65: Focus Check

    PRESENT Video Clamp RTA1 RTA2 Mic Bypass Ch 1 Ch 2 Oscilloscope Press the CP650 left menu button to move to the menu Optical Focus optical focus adjust menu. >Projector: P1 Channel: Left The scope RTA will display the frequency Press OK when ready.

  • Page 66: Optical Hf Equalization (Slit-Loss Eq)

    5.10 Optical HF Equalization (Slit-Loss EQ) This step adjusts the high frequency response of the optical preamplifier circuit. The CP650 provides automatic or manual facilities for optical, or slit-loss, high frequency equalization. The Auto menu appears first: Auto Slit Loss EQ Continue to play the Cat.
  • Page 67 CP650 Installation Manual A-Chain Alignment Rotate the front panel knob for the most extended high frequency response without “peaking.” Note: If this procedure does not improve the response, the problem may be a degraded slit or lens damage. menu When the desired response has been achieved, press the right menu OK button to save the settings.

  • Page 68: Chapter 6 Digital Soundheads

    5 mm (1/4 inch) apart. Use the white painted semi-circles for angular alignment of tension arms . Make sure that the rollers do not touch. Dolby Digital Print Threading Path Bypass Threading Path Figure 6–1 Digital Soundhead Adjustments...

  • Page 69: Adjustment With Oscilloscope

    The following test setup will enable adjustment of focus and confirmation or adjustment of light level and optical alignment. 1. Make sure power to the digital soundhead is provided. Power to the CP650 should also be on. 2. Open the CP650 front panel setup access door.

  • Page 70: Led Brightness Confirmation And Adjustment

    CP650 Installation Manual Digital Soundheads Figure 6–2 Digital Video Oscilloscope Image – Focus Adjustment. LED Brightness Confirmation and Adjustment The optimum peak video signal voltage (unobstructed light through the perf hole) is 4 V, measured from the 0 V reference baseline to the upper trace. If necessary, adjust the Cat.

  • Page 71: Chapter 7 Final Adjustments

    20 milliseconds after the arrival of sound from the front speakers. The delay is adjustable from 20 to 150 ms in 1 ms steps. The setting is stored to CP650 memory using the procedure outlined below. Use the following formula to calculate...
  • Page 72 If a stereo film is not available, the delay time can be checked with a mono film if the film is played in Format 04, Dolby A-type optical with surround. All speakers should be ON for this test.

  • Page 73: Setting Digital Surround Delay

    Final Adjustments Setting Digital Surround Delay The CP650 automatically calculates a typical digital surround delay based on the optical surround delay setting performed in the previous section. Actual theatre geometry affects the amount of surround delay required, therefore you may wish to set the delay manually.

  • Page 74: Setting Dolby Digital Reader Delay

    Width (meters) Setting Dolby Digital Reader Delay On a Dolby Digital print, the digital sound data is located six frames in advance of the analog soundtrack, and 26 frames in advance of the picture. When the digital soundhead is mounted above the analog soundhead (as with the Cat. No. 701) a delay is necessary in order to synchronize the digital soundtrack with the analog track and the picture.

  • Page 75: Table 7-3 Typical Delay Settings For Dolby Digital Readers

    Proj 1 menu Press the left menu button to move to the Dolby Digital Reader Delay setting menu. Both optical and digital audio are present while the CP650 is set to this menu item. Dolby Digital Reader Delay > xxx Perforations The audio contains equal digital and optical sound simultaneously.

  • Page 76: Nonsync Level Adjustment

    CP650 Installation Manual Final Adjustments Nonsync Level Adjustment Press the left menu button to move to the Nonsync 1 (or Nonsync 2) Level adjust menu. Nonsync Level Play a CD or cassette, etc, on the nonsync device and > xx adjust the front panel knob for the desired level in the theatre.

  • Page 77: Mono Level Trim And Eq Adjustment

    < + > Note: With the “+” symbol located at the far-right position (HF setting) of the display, the CP650 applies the “Academy” filter. Press the OK menu button to save the desired EQ setting.

  • Page 78: Preset Fader Levels

    Preset Fader Levels menu Press the left menu button to move to the Preset Fader Levels menu. Preset levels can be assigned to each CP650 format button. Preset Fader Levels >Format xx Fader: xx.x Rotate the front panel knob to select the format button you wish to preset.

  • Page 79: Assigning User Button Formats

    Rotate the fader knob to select one of the many > > > > Format 13 format choices available to you. This example shows Surround EX format 13, Dolby Digital Surround EX, selected. Press the OK button to save the assignment to the Saving Changes... User 1 button.

  • Page 80: 7.10 Reversion Mode

    7.10 Reversion Mode Caution: Be aware that leaving the CP650 set to No Reversion mode prevents automatic switching to optical sound if there is a loss or failure of the Dolby Digital soundtrack. menu Press the left menu button to move to the Reversion Mode menu.

  • Page 81: 7.12 Noise Gating

    7.13 Clock Set The clock is used only to “time-stamp” event log messages to aid in troubleshooting. The CP650 will operate perfectly without setting the clock. Press the left menu button, or press and hold the button while rotating the front panel knob to move to the Clock Set menu.

  • Page 82: Date Set

    1 2 3 4 5 6 8 Slide DIP switch 6 down to the normal position. The CP650 will switch to normal operation with the user's menu choices available. Press the left menu button multiple times to move to the Mute Fade-in Time screen.

  • Page 83: Chapter 8 Accessories

    The combined length of connecting cable to all the remote units should not exceed 100 m (300 ft). • When you connect one or more remote units to the CP650, all units are live and communicate with each other. Any fader level adjustment changes the display on all of the connected units.

  • Page 84: Cat. No. 779 Remote Control Installation

    Use a two-conductor shielded cable (Belden 8451 or equivalent) to connect the remote to the CP650. To prevent wear on the cable from the metal edge of the hole you create, use a rubber or neoprene grommet on the cable. The diameter of the hole you make should be the same as the diameter of the cable grommet or conduit bushing.

  • Page 85: Figure 8-3 Remote Control Circuit Board Connector

    CP650 Installation Manual Accessories The wire to the CP650 must run from the connection point on the circuit board without touching any circuit board components. • If the remote control will be mounted in a console or on a wall, we recommend placing the hole in the bottom of the housing.
  • Page 86 CP650 Installation Manual Accessories 8.2.4 Set the Address Switch For the CP650 to communicate with all the remote units, each unit must be set to a unique address number using switch SW1. Interface connector SWITCH SIDE VIEW switch SW1 to any setting except 0 Figure 8–4 SW1 Address Switch Location...

  • Page 87: Figure 8-5 Connection Of Remotes To The Cp650

    Note: All remote units attach to the same terminals on the connector. Do not connect wires from any Dolby remote unit to terminal 4, 5, or 6. 2. Plug the connector into the Remotes and Aud Fader input on the CP650 rear- panel.

  • Page 88: Cat. No. 771 Remote Fader Installation

    3. Use a two-conductor shielded cable (Belden 8451 or equivalent) to connect the remote to the CP650. To prevent wear on the cable from the metal edge of the hole you create, use a rubber or neoprene grommet on the cable. The diameter of the hole you make should be the same as the diameter of the cable grommet or conduit bushing.

  • Page 89: Chapter 9 Maintenance And Troubleshooting

    Digital print format has robust error correction information encoded along with the audio data, and the CP650 uses a powerful digital error correction technique, allowing the data to be read perfectly even if scratches and dirt are present. However, best performance will be obtained if the print is kept clean.
  • Page 90 In normal operation, the LED assembly used in the Cat. No. 701 Digital Soundhead will exhibit gradually reduced light output over its life. If it becomes necessary to replace the LED, follow the procedure outlined below. The LED assembly is Dolby part number 83308.
  • Page 91 Turn on power to the digital soundhead and the CP650. 2. Set the oscilloscope display a. Thread and play a Cat. No. 69T Dolby tone test film loop. b. Display only Channel 2, and adjust trigger level to lock on to the clamp signal.

  • Page 92: Figure 9-5 Scope Display Of Cp650 Video Test Point Signal

    Clamp (Trigger) Trace (CH2) SET HORIZONTAL SWEEP Figure 9–5 Scope Display of CP650 Video Test Point Signal 3. Adjust the LED Position a. Switch the Channel 1 video input coupling back to DC. Figure 9–6 Adjust LED Assembly for Optimum Video Signal b.
  • Page 93 CP650 Installation Manual Maintenance and Troubleshooting 9.2.2 Replacing the Cat. No. 700 Digital Soundhead Exciter Lamp To replace the exciter lamp, carefully remove the six screws holding the rear cover/power supply of the digital soundhead. Allow the lamp to cool if necessary.

  • Page 94: Cp650 Troubleshooting

    CP650 Installation Manual Maintenance and Troubleshooting CP650 Troubleshooting 9.3.1 Power Supply Voltage Ranges Six test points are located on the front sub-panel for measuring power supply voltages. They can be accessed by removing the front panel: --15V --14VB +15V MIC MUX...

  • Page 95: Exploded View And Board Locations

    Figure 9–10 Model CP650 Exploded View Caution: Many components used on the circuit boards are sensitive to electrostatic damage. It is essential to wear an earthing strap while handling or changing CP650 circuit boards. To gain access to the CP650 circuit boards: 1.
  • Page 96 Verify that all power connectors are fully inserted into their sockets. Press main power button. If CP650 still does not come on, check fuse behind plastic door in AC mains power inlet module located on the rear of the unit.
  • Page 97 Power button illuminated. Front panel Turn on the CP650 with the front panel power button. Call dark. There is sound. System is in Bypass operation. service engineer if the system is still not operating...
  • Page 98 Format 10 requires the Dolby Digital Cat. No. 773 board. connectors. Formats 13, 80, or 81 require the Cat. No. 794 Dolby Digital Surround EX board. Verify that the LED (or exciter lamp) in the digital film...
  • Page 99 Redirect the light from the offending source or keep it off during a showing. If the hum still is present, the problem is either in the grounding or wiring or in the CP650. Call your service engineer. 9-11...
  • Page 100 Call service engineer. Wiring from the stereo solar cell to the CP650. Check that the wiring from the stereo solar cell to the CP650 has not become damaged and that the solder connections to the fanning strip are secure. Check that the D-connector for the solar cell is firmly plugged into the CP650.
  • Page 101 CP650 Troubleshooting Chart Maintenance and Troubleshooting Symptom Probable Cause Recommended Action The sound from two or more channels is If two distorted channels are served by the same two- distorted and you can hear the distortion Malfunctioning two-channel power amplifier.
  • Page 102 If changing both the device and the selection does not eliminate the distortion, the problem is in the CP650, probably on the Cat. No. 772 board. Defective Cat. No. 772 board. Call service engineer.
  • Page 103 Defective Cat. No. 772 board. Call service engineer. With an automation system connected to Unplug the D-connector from the back of the CP650. If the CP650: you can exercise local control over the CP650, the problem is either the wiring to the automation equipment or the...
  • Page 104 CP650 Troubleshooting Chart Maintenance and Troubleshooting Symptom Probable Cause Recommended Action If possible, check that the diode is installed across the You can hear pops or thumps during If the projector changeover relay power is DC, a diode relay winding. If you are familiar with such electronic projector changeover.

  • Page 105: Power Supply Wiring Diagrams

    DIGITAL_GND BYPASS FUSE +5VDC +5VDC INTERNAL FUSE NOTE: +5VDC +5VDC 110 VAC: T 200MA L EARLY CP650 UNITS USED 220 VAC: T 100MA L A SINGLE T 315 MA L FUSE. 250VAC +5VDC +5VDC VARISTOR DC GOOD RTN GRN/YEL GRN/YEL...
  • Page 106 FUSE OUTPUT (+) +5VDC INTERNAL FUSE NOTE: OUTPUT (+) +5VDC 110 VAC: T 200MA L EARLY CP650 UNITS USED 3.5A 220 VAC: T 100MA L A SINGLE T 315 MA L FUSE. 250VAC OUTPUT (+) +5VDC VARISTOR POWER FAIL RTN...
  • Page 107 Digital Reader Exploded View Maintenance and Troubleshooting SCREW M3 X 6 CAP SKT BLK CAT. NO. 534 HOLE PLUG 3/8" DPN 60230 RV1 LED CURRENT DPN 65199 2-PL WASHER 5/8" WAVE ADJUSTMENT POT 2-PL, CAT. NO. 701 ONLY DPN 61213 SCREW M4 X 14 SET SKT CUP SST SCREW M4 X 6 PAN POZI BLK 2-PL...
  • Page 108 SPRING BASE OPTIONAL 35/70 MM DPN 60245 STANDARD 35 MM DPN 67119 BYPASS (DPN 83239) 2-PL, CAT. NO. 700 ONLY DESCRIPTION DOLBY PART NUMBER (DPN) TRANSROLLER 67196 67097 CAT. NO. 700/701 REAR VIEW SHAFT 67197 67177 (POWER SUPPLY ASSEMBLY NOT SHOWN)

  • Page 109: Appendix A Software Operations

    Appendix A Software Operations Updating CP650 Software 1. Connect the PC to the CP650 Cinema processor using a serial cable connected to the CP650 serial data connector on the front setup panel (or on the rear panel). SERIAL DATA MIC MUX...

  • Page 110: Transferring Settings Between Two Cp650S

    7. Save the retrieved settings to disk. The file name should end with the “.dby” extension. 8. Unplug the serial cable from the source CP650 and plug it into the destination CP650. Note: If you have closed the CP Setup program or opened another settings parameter file (.dby), then before continuing you must select “Open”...

  • Page 111: Appendix B Back Panel Connectors

    Appendix B Back Panel Connectors B.1 Output Connectors Main Audio Output Connector The main audio outputs of the CP650 are sourced from balanced output circuits. The ® connector type and pin configuration conform to the THX standard. With a Cat. No. 794 Surround EX decoder board installed (standard Model CP650), the Left Surround and Right Surround outputs on this connector are disabled.

  • Page 112: Table B-2 Option Card I/O Connector With Cat. No. 794 Installed

    The pinout of this connector is determined by the type of option board installed in the connectors of the Cat. No 774 system controller board. In a standard CP650, the Cat. No. 794 Dolby Digital Surround EX Decoder / Digital Aux Input board is shipped in this location. Output signals for the surround channels appear on this connector.

  • Page 113: Table B-3 Dolby Digital Reader Input Connector Pinout

    These connectors are used for connecting up to two Dolby Digital film soundtrack readers to the CP650 or CP650D. These connections are inactive on model CP650SR. The pinout and the signals on these connectors are identical to the Dolby models DA20 and CP500D.

  • Page 114: Table B-4 Motor Start Connector Pinout

    The motor start connector is used to interconnect the changeover control lines of the CP650 with the theatre control system. If the CP650 is to be used in a platter operation (single projector), a jumper must be installed on this connector between pins 1 and 5.

  • Page 115: Table B-7 Mic Mux Connector

    An EQ microphone or mic multiplexer can be connected at this location without the need for access to the CP650 rear panel. Pins 1, 2, and 5 are wired in parallel with the rear panel microphone input XLR connector. If you wish to use a connector already wired for use with a Dolby CP500, add a jumper between pins 5 and 6.

  • Page 116: Table B-9 Six-Channel Analog Input Connector Pinout

    6-Channel Analog Audio Input Connector This input is an unbalanced analog audio input. The nominal reference level is approximately 300mV. There are no input level trim controls within the CP650 for this input. Table B–9 Six-Channel Analog Input Connector Pinout...

  • Page 117: Table B-10 Automation I/O Connector Pinout

    Back Panel Connectors B.3 I/O Connectors Automation I/O Connector This connector is a 25-pin female D-connector, wired to closely match the configuration of the Dolby Model CP65. Table B–10 Automation I/O Connector Pinout Connection Specification S0 (automation select) format 01 Mono...

  • Page 118: Table B-11 Automation I/O Connector Pins Used For Noise Gating

    This connector “mirrors” the RS-232 connector located on the front setup panel. A PC can be connected at either location for performing complete cinema processor alignment using Dolby CP650 setup software. Caution: Only one of the two RS-232 connectors can be used at any given time.

  • Page 119: Appendix C Optical Surround Level Trim

    Surround Delay. Optical Surround Note: If the optical surround delay has been set during a previous Delay CP650 system setup then write down the current delay setting > xxx mSec displayed! Rotate the front panel knob counterclockwise to set “20 mSec”...
  • Page 120 +1.2 dB. Press the OK button to save the change. Saving Changes... If a previous CP650 setup has been performed, restore the original optical surround delay setting menu noted in the step above.

  • Page 121: Appendix D Format Descriptions

    Back surround; internal EX decoded signal sent to Bsl and Bsr outputs Note: In Dolby Digital 5.1 mode, Ls refers to the combination of Bsl and Ls speakers; Rs refers to the combination of Bsr and Rs speakers. In Dolby Digital Surround EX mode, Ls and Rs refer only to the left and right side speakers.

  • Page 122: Format Definitions

    CP650 Installation Manual Format Definitions Format Definitions The formats supported by the CP650 are described below. If a format name is too long for display on the CP650 front panel (limited to 19 characters), a second, short name is given.
  • Page 123 Bsl and Bsr channels), and Rs. The out-of-phase information is discarded. The audio for the screen channels and subwoofer is output via the CP650’s main audio outputs, and the audio for the four surround channels is output via the “Option card I/O”...
  • Page 124 Four channels of A-type NR are applied to the L, C, R and S tracks (tracks 1, 3, 5, and 6). The CP650 generates the outputs L, C, R, Ls, Rs, and SW. The Ls and Rs outputs are copies of the “S” mono surround input track. The subwoofer track is created by lowpass filtering the Le and Re tracks at 180 Hz and summing them.
  • Page 125 The audio output is sent to Ls and Rs only. Format 66 Test Tone 320 Hz Audio Description: This internally generated audio format outputs a 320 Hz Dolby level tone on all channels. Format 70 Video PA Nonsync 1...
  • Page 126 PCM or Dolby Digital (consumer), and configures the decoder appropriately. If the bitstream is Dolby Digital 5.1, it is decoded as such and sent to the outputs. If the bitstream is Dolby Digital and encoded in 2/0 Pro Logic, it applies matrix decoding to the L and R signals to derive the four-channel (plus subwoofer) audio.
  • Page 127 Bsl and Bsr channels), and Rs. The out-of-phase information is discarded. The audio for the screen channels and subwoofer is output via the CP650’s main audio outputs, and the audio for the four surround channels is output via the “Option card I/O”...

  • Page 129: Appendix E External Control Of Cp650

    (“\r\n”). This is the typical “end of line” combination sent by PC terminal programs. Current CP650 settings may be queried by substituting a question mark “?” for the “<value>” field. The complete set of known settings may be queried by using the...
  • Page 130 CP650 Installation Manual External Control of CP650 Commands Range of Values Notes format_button 0 .. 7 indicating which button on the CP650 front panel should be applied: Data Button Applied Format 01 Format 04 Format 05 Format 10 Format 11...
  • Page 131 No Parity, No Flow Control) and cannot be invoked while the SERIAL DATA port is in use by the CP650 Setup or Reader Alignment programs. 2. The interface operates in RAW serial mode. Characters are not echoed back to the controller, and control characters are ignored.

  • Page 132: Control Via Remotes Connector

    While this was never intended to be a feature of the remote port, it may be possible to command the CP650 to change the fader level, select any one of the eight front-panel formats, and to toggle the mute status.
  • Page 133 The CP650 supports remote accessory device addresses 1 through 9. The CP650 has intentionally added one non-standard modification to the DDCMP protocol. If the CP650 sends out the hex value “FF” twenty times in a row, all remote accessories should recycle themselves to their power-on state. This includes resetting themselves to the ISTRT state, and attempting to re-establish the link.
  • Page 134 The next most significant bit tells if the CP650 is muted (0 = not muted, 1 = muted). The next most significant bit tells which projector is in use (0 = projector 1, 1 = projector 2).

  • Page 135: Appendix F Setup And User Menus

    DIP switch 6 UP The Bsl and Bsr channels shown in italics are available only with Cat. No. 794 installed. B-Chain: menu menu Notes Format and CP650 status Adjust fader. Standard 0–10 display setting is 7.0. Calibrates CP650 internal Enter room readings:...
  • Page 136 CP650 Installation Manual Setup and User Menus A-Chain: menu menu Notes Automatic Optical Level Run Cat. No. 69T test film Adjust, Projector 1 and Press OK. Automatic Optical Level Adjust, Projector 2 Run Cat. No. 69T test film Manual Optical Level Adjust, and Press OK.

  • Page 137: Cp650 User Menu

    Last Format used. used. Contrast Adjustment Set the display contrast Scroll up and down the Event Log event listing Useful for telephone About this CP650 - Screen 1 • discussions with your Control software version service engineer. number • Optional boards installed About this CP650 - Screen 2 •...

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