Dolby Laboratories CP650 Installation Manual
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Dolby Laboratories CP650 Installation Manual

Dolby Laboratories CP650 Installation Manual

Digital cinema processor
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Film-Tech
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  • Page 1 Film-Tech The information contained in this Adobe Acrobat pdf file is provided at your own risk and good judgment. These manuals are designed to facilitate the exchange of information related to cinema projection and film handling, with no warranties nor obligations from the authors, for qualified field service engineers.
  • Page 2 Model CP650 Digital Cinema Processor Installation Manual Issue 1A Part No. 91569...
  • Page 3 (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 4: Table Of Contents

    Replacing an Existing Sound System............2-1 Check Fuse and Bypass Mains Voltage Selector ........2-2 Mount the CP650..................2-3 Connect the CP650 ...................2-4 2.4.1 Motor Start Relays (Models CP650 and CP650D) .....2-4 2.4.2 Remote Controls .................2-4 2.4.3 Solar Cell Reader Boards ............2-5 2.4.4 Nonsync Sources.................2-7...
  • Page 5 CP650 Installation Manual Chapter 5 A-Chain Alignment Overview ....................5-1 Reverse-Scan Checkup - Projector ............5-2 Analog Optical Alignment - Projector............5-2 Dolby Level Set ..................5-4 Film Path Alignment Check ..............5-6 Cell Alignment Check ................5-7 Cell Wiring Check ..................5-8 Azimuth Check..................5-8 Focus Check .....................5-9 5.10...
  • Page 6 CP650 Installation Manual Chapter 9 Maintenance and Troubleshooting Print Cleanliness ..................9-1 Digital Soundhead Maintenance...............9-1 9.2.1 Replacing the Cat. No. 701 Digital Soundhead LED Assembly ..9-2 9.2.2 Replacing the Cat. No. 700 Digital Soundhead Exciter Lamp..9-5 CP650 Troubleshooting................9-6 9.3.1 Power Supply Voltage Ranges............9-6 9.3.2...

  • Page 7: 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 8: Hardware Configurations Available

    Digital Surround EX decoding capability plus an AES/EBU digital input accommodating stereo PCM audio and Dolby Digital (AC-3) 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 9: Accessories

    CP650 Installation Manual Introduction Accessories • Cat. No. 771 Remote Fader • Cat. No. 779 Remote Control Unit • Upgrade kit UD/650, which includes the Cat. No. 773 circuit board • Upgrade kit UEX/650, which includes the Cat. No. 794 circuit board List of Catalog Numbers Used Cat.
  • Page 10 CP650 Installation Manual Introduction Other Connections Cat. No. 779 remote control unit and Cat. No. 771 remote fader connector (terminals for stripped wires). Connectors (front and rear) for external PC control and setup, RS-232C (9-pin D-connector). Hearing impaired output: center-weighted sum of L, R, and C, output impedance 100Ω, output level 200 mV fixed, unbalanced (RCA-type phono jack).

  • Page 11: List Of Nonsync Formats Available

    Non Sync 1 or Non Sync 2 input jacks. Lt and Rt are passed to the L and R outputs of the CP650. The Lt and Rt channels are also passed through the Dolby Pro Logic decoder, with only the surround output being routed to both the Ls and Rs outputs of the CP650.
  • Page 12 CP650 Installation Manual Introduction Format 74: Video Pro Logic no SW This external audio format has two discrete input channels (L and R) and is input through the Non Sync 1 input jacks. The audio is processed with Dolby Pro Logic decoding.

  • Page 13: How To Identify Types Of Soundtracks

    CP650 Installation Manual Introduction How to Identify Types of Soundtracks Edge of film Dolby Digital soundtrack Analog soundtrack Picture area Figure 1–1 Photograph of Film Soundtracks A Dolby Digital, Dolby Digital Surround EX, stereo optical (Dolby A-type or SR), or mono optical print should be identified as such on both the film can and the leader.

  • Page 14: Regulatory Notices

    CP650 Installation Manual Introduction Regulatory Notices 1.8.1 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 15 CP650 Installation Manual Introduction 1.8.5 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 16: 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 17: Check Fuse And Bypass Mains Voltage Selector

    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 2-7 shows the switch location.

  • Page 18: 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 19: 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 20: 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 21 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 Wiring Using Two 3-Conductor Shielded (screened) Cables CP650 –...

  • Page 22: Nonsync Sources

    2.4.4 Nonsync Sources The CP650 has two sets of 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 23: Exploded View And Board Locations

    Cat. No. 792 Bypass Power Regulator Bypass Power Supply Fuse Holder Power / Bypass Button Front Panel Mounting Screw Figure 2–7 Model CP650 Exploded View Disassembly steps can be found in the troubleshooting section of this manual. See Chapter 9, section 9.3.2.
  • Page 24 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 25 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 26 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 27: 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 28 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 29 This indicator appears if a problem is detected in the bypass power supply circuitry. Power button The power button operates the main power supply for the CP650. In the ON position the CP650 is powered by the main supply. As with other Dolby cinema processors, the CP650 utilizes a separate backup (bypass) power supply.

  • Page 30: The Setup Control Panel

    Note: For convenience, pressing the illuminated format button once, or any other format button twice, causes the CP650 to immediately return to the menu top-level screen display. This feature is handy for making a quick change, then returning to normal operation. This feature is not active in setup mode (described below).

  • Page 31: 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 32: 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 33 CP650 Installation Manual Front Panel and Alignment Overview The amount of reverberation varies with frequency. As frequency rises, more audio is absorbed rather than being reflected. A typical reverberation curve in a theatre rolls off at about 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.

  • Page 34: 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 35: Microphone Placement

    90° to 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 36: 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 37 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 38: 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 39: Subwoofer Channel

    CP650 Installation Manual B-Chain Alignment Right = 85 dB Repeat this process for the Right screen channel. Repeat this process setting the Ls and Rs channels to Ls and Rs = 82 dB 82 dB. menu When all channels have been adjusted, press the right-hand OK button.

  • Page 40: 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 41: 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 42 1 kHz is the default start frequency band selected. A 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.

  • Page 43: Setting Subwoofer Channel Eq

    CP650 Installation Manual B-Chain Alignment 4.6.3 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 44 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 45: 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 46 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 47 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 48: Chapter 5 A-Chain Alignment

    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. A Cat. No. 69P pink noise test film is used for A-chain frequency response and soundhead alignment.

  • Page 49: 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 50 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 51: 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 52 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 53: 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...

  • Page 54: 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 55: 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 56: Focus Check

    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 57: 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 58 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 59: Chapter 6 Digital Soundheads

    CP650 Installation Manual Chapter 6 Digital Soundheads Mechanical Alignment Mechanical alignment of the Cat. No. 701 (or 700) Digital Soundhead consists of confirming that the film path through the Digital Soundhead is aligned with the path through the projector. For built-in reverse-scan (basement) digital soundheads, see the manufacturer's instructions.

  • Page 60: Focus Adjustment

    CP650 Installation Manual Digital Soundheads 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. 3. Connect a probe from Channel 1 of a 20 MHz or greater bandwidth oscilloscope to the VIDEO Test Point with the ground lead attached to the ground test point.

  • Page 61: Led Brightness Confirmation And Adjustment

    CP650 Installation Manual Digital Soundheads 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. No. 701 power supply output to achieve the correct video voltage. See the figure below for adjustment location (VR1).

  • Page 62: 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 63 CP650 Installation Manual Final Adjustments 1. Estimate the distance between a rear seat and the nearest surround loudspeaker, in feet. If the metric system is used, convert the distance from meters to feet by multiplying by three (3). 2. Estimate the distance from this seat to the front loudspeakers, in feet. If the metric system is used, multiply the distance by three (3) to convert distance from meters to feet.

  • Page 64: 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 65: Setting Dolby Digital Reader Delay

    In the CP650, this delay is set by entering the number of film perforations, within the range from 12 perfs (approximately 160 ms delay) to 512 perfs (approximately 5 seconds).
  • Page 66 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 67: 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 68: Mono Level Trim And Eq Adjust

    < + > 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 69: 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 70: Assigning User Button Formats

    CP650 Installation Manual Final Adjustments Assigning User Button Formats Any available format can be assigned to the U1 and U2 buttons ("User 1" and "User 2"). Then, when the button is pressed, that format will be selected. Press the left menu button to move to the to the User Format 1 menu.

  • Page 71: 7.10 Reversion Mode

    CP650 Installation Manual Final Adjustments 7.10 Reversion Mode Note: 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 72: 7.12 Clock Set

    7.12 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 73: 7.13 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 74: Chapter 8 Accessories

    CP650 Installation Manual Chapter 8 Accessories Details on the remote control unit and remote fader will be added in future releases of this manual...

  • Page 75: 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 76: Replacing The Cat. No. 701 Digital Soundhead Led Assembly

    CP650 Installation Manual Maintenance and Troubleshooting 9.2.1 Replacing the Cat. No. 701 Digital Soundhead LED Assembly 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.
  • Page 77 Set horizontal sweep rate to 2 µsec/div. e. Set the trigger source to Channel 2 and positive polarity. f. 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.
  • Page 78 CP650 Installation Manual Maintenance and Troubleshooting 3. Adjust the LED Position a. Switch the Channel 1 video input coupling back to DC. b. Loosen the 2.5 mm hex screws and carefully rotate the LED assembly while watching the scope image. Adjust for maximum video signal voltage (unobstructed light through the perf hole) on the upper trace.

  • Page 79: Replacing The Cat. No. 700 Digital Soundhead Exciter Lamp

    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 80: 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 81: Exploded View And Board Locations

    Figure 9–3 Model CP650 Exploded View Note: 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 82 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 83 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 84 Dolby Digital information and is correctly threaded failure. through the digital reader. If the CP650 accepts a Format 10 command, the digital sub-system is probably still working. Front panel display reads “Reverted!”...
  • Page 85 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 86 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 87 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 88 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 89 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 90 CP650 Troubleshooting Chart Maintenance and Troubleshooting 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 91: 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 92 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 93: 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 94 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 95 Dolby Digital Reader Connectors (Reader 1 and 2) 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 96 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 97 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 98 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 A-9 6-Channel Analog Input Connector Pinout...

  • Page 99: Pin Connection

    CP650 Installation Manual 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 A-10 Automation I/O connector Pinout Connection Specification S0 (automation select) format 01 Mono...
  • Page 100 CP650 Installation Manual Back Panel Connectors Serial Data (RS-232) Connector 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 alignment software.

  • Page 101: 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 102 +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 103: Appendix D Setup And User Menus

    Setup and User Menus 1 2 3 4 5 6 8 CP650 Setup Menu DIP switch 6 UP menu menu Notes Format and CP650 status Adjust fader. Standard 0–10 display setting is7.0. Calibrates CP650 internal SPL meter to agree with Calibrate SPL 45–108.5 dB...
  • Page 104 CP650 Installation Manual Setup and User Menus 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 105: Cp650 User Menu

    Last Format 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 •...
  • Page 106 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...

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