Instruction/ maintenance manual of the product CP65 Dolby Laboratories
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Model CP65 Cinema Processor Installation and Alignment Instructions Issue 4 Part No. 91234.
Model CP65 Cinema Processor Installation and Alignment Instructions Dolby Laboratories Inc U.S. Headquarters Dolb y Laboratories Inc 100 P otrero A venue San Francisco, CA 94103-4813 T elephone 415-558-0200 F acsimile 41-863-1373 www .
Model CP65 Cinema Processor Installation and Alignment Instructions iii T able of Contents INTRODUCTIO N ............................................................................................................ . v CP6 5 ...........................
iv Model CP65 Cinema Processor Installation and Alignment Instructions SECTION 6 REFERENCE BLOCK DIAGRAMS .............................................
INTRODUCTION This manual contains essential information on the installation and alignment of the CP65 Cinema Sound Processor. The CP65 supersedes the CP55 and is available in three versions: CP65 The .
This installation and alignment manual covers the procedures necessary to ensure that the theatre sound system is accurately aligned to standards that have been established by Dolby Laboratories. Following these procedures will ensure that the theatre sound system will accurately reproduce the soundtrack as the director and sound mixers intended.
1-1 SECTION 1 EQUIPMENT REQUIRED a. Dual-trace oscilloscope with X-Y facilities. b. 1/3 Octave Real Time Spectrum Analyzer (RTA) with calibrated microphone. (Preferably multiple microphones and a multiplexer should be used.) c. Sound Pressure Level Meter (with slow time-constant and C weighting scale).
1-2 (3) SMPTE Buzz Track (4) Stereo Optical Surround Level — Cat. No. 151 g. The following films can also be purchased from Dolby Laboratories or a cinema equipment dealer. The films are optional items that are used in final system sound verification: (1) “Jiffy” Test Film — Cat.
2-1 SECTION 2 INITIAL SET -UP AND INST ALLA TION Before you remove or replace the Cat. No. 240A Optical Pre-Amp or the Cat. No. 249 Power Supply Card, first disconnect AC power from the CP65 to protect the speakers and the CP65 from damage.
2-2 Locate the power amplifiers away from the Cat. No. 240A optical preamplifier to avoid hum pickup problems. STEP 4 Disconnect power from the existing cinema sound equipment. STEP 5 Disconnect all cabling from the existing cinema sound processing system, but do not disconnect the wiring from power amplifiers, etc.
2-5 STEP 9 Next, check the jumpers in the following locations: Cat. No. 441 Surround Equalization, Subwoofer and SR • D Interface Card (if fitted). J3 J2 High Cat. No. 441 J1 Low Subwoofer Level Range High Low Output Level Range J4 Optical Subwoofer Cr ossover Frequency Surr ound Ster eo Mono 100 Hz 50 Hz auto subwoofer off The Cat.
2-6 Cat. No. 242, B-Chain Card Jumper Holder (for storage) J1 Cat. No. 242 Mono low frequency filter OFF 100mV in 1V in Magnetic Input Sensitivity Setting J5 J6 J7 J8 Cut jumpers for high sensivity power amplifiers J1 Mono LF cut In/Out: selects optional low frequency cut when Mono (format 01) is selected.
2-7 Cat. No. 443, Control Logic Card Connect center pad to desir ed wake-up state pad (factory setting shown). Cannot select r emote faders Can select r emote faders REMOTE/LOCAL F ADER JUMPERS T ur n.
2-8 CP65 Backplane J16, J17 J24 Magnetic format headers : In the standard configuration the CP65 is fitted with two channels of A-type noise reduction and therefore does not provide processing for signals entering through the Mag/Aux inputs on TB3 and TB4.
2-9 CP65-300 In a CP65-300 (when Cat. No . 300 modules are fitted in place of the normal Cat. No . 350 modules) J16 and J18 should be rotated so that the words “ Format 42 ” appears the right way up. With J24 in the “ NR ” position input signals will be A-type decoded when the Mag/Aux format is selected.
2-10 Cat. No. 241 Surround Equalization and Optical Bass Extension. Module (if fitted). High subwoofer output Cat. No. 241 J1 Low subwoofer output J1 Optical Bass Extension output level : sets the output level range for the subwoofer channel.
2-11 STEP 10 If they are not already installed in the CP65 card cage, install all of the cards for your system as shown. Card Descriptions : Dolby Dolby Dolby Dolby Dolby SR R S Dolby THESE MODULES ARE NECESSARY FOR BYP ASS OPERA TION 2-channel Lt Rt n-sync surr gain Q power supply status (L,R) Lt/Rt (C) Lt 450 A (S) Rt 450 A on gnd Cat.
2-12 Slot No. Card Function 5 Cat. No. 222 Contains two channels of Dolby A-type noise Two-channel Noise reduction circuitry with LED indicators to set Reduction Module Dolby Level. 6 Cat. No. 150 Derives left, right, center, and surround 2:4 Channel Decoder information from the two optical tracks on the Card film.
2-13 Slot No. Card Function 13 Cat. No. 249 Contains a semi-regulated power supply with Power Supply Module nominal outputs of +15V, -15V, and 24V. Also contains the bypass amplifier, gain trimmer, and a +12V bypass power supply.
2-14 ADDITIONAL INFORMATION FOR THE SAFE OPERATION OF THE CP65 To ensure proper operation and guard against potential shock hazard, the CP65 must be connected only to a properly wired, grounded (earthed) mains receptacle. If you are uncertain about the wiring of your mains outlet do not use it.
2-15 GB D F I S NL IMPOR T ANT SAFETY NOTICE This unit complies with the safety standard IEC65. T o ensure safe operation and to guar d against potential shock hazard or risk of fir e, the following must be observed: • If the unit has a voltage selector , ensure that it is set to the corr ect mains voltage for your supply .
2-16 STEP 11 Turn the front pannel FADER fully down, then connect the CP65 to mains power. Model CP65 STEP 12 With the NORMAL/BYPASS switch (accessible with the front door open) in the NORMAL position, verify that all three LEDs on the Cat. No. 249 Power Supply Module are lit.
2-17 4. Power amplifiers . Disconnect from the CP65 and ground the inputs to determine if the power amplifiers are causing hum problems. With CP65 FADER turned up and format 04 selected: 5. Solar cell wiring . Check the shield connections. Cell wiring should be placed away from mains and other wiring.
3-1 SECTION 3 AN OVERVIEW OF THE ALIGNMENT PROCEDURE This section is an overview of the general principles involved in the alignment of Dolby cinema equipment. It is useful to develop an understanding of why the CP65 is aligned as described in this manual.
3-2 and with a broad range of speakers. Accurate equalization requires the use of standardized acoustic measurement procedures. A pink noise generator provides a continuous random noise signal that covers the total bandwidth and is used to measure and adjust the response of the loudspeakers.
3-3 Many loudspeakers used in theatres are far from ideal and require boosting of the low- and high-frequency extremes in order to produce an approximation of the standard reference response curve.
4-1 SECTION 4 A-CHAIN ALIGNMENT The A-chain is the part of the sound system that covers the film path, solar cell, optical preamplifier, slit loss equalizer and Dolby noise reduction circuit. The CP65 does not contain a magnetic A-chain but has facilities for switching external magnetic preamplifiers into the B-chain.
A-Chain Alignment Procedures Step No. 4-2 Indication Action a. Preliminary Procedures 1 2 3 A-Chain Alignment Procedures Notes 4-3 a. Preliminary Procedures Inspect the lateral film guides for evidence of cuts, cracks, surface defects, and any foreign materials that could impair the film guiding.
A-Chain Alignment Procedures Step No. 4-4 Indication Action 70 TO 80% OF RA TED VOL T AGE a. Preliminary Procedures ✓ 4 5 A-Chain Alignment Procedures Notes 4-5 a.
A-Chain Alignment Procedures Step No. 4-6 Indication Action b. Optical Preamplifier Adjustments 1 2 3 Dolby Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj. 1 hf GAIN hf GAIN signal present Cat. No. 240A A-Chain Alignment Procedures Notes 4-7 b.
A-Chain Alignment Procedures Step No. 4-8 Indication Action b. Optical Preamplifier Adjustments Mono 01 format Mono 01 format 4 5 6 Dolby Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj. 1 hf GAIN hf GAIN signal present Cat. No. 240A Cat.
A-Chain Alignment Procedures Step No. 4-10 Indication Action b. Optical Preamplifier Adjustments L L L L RR RR ✓ ✓ OSCILLOSCOPE TRACES Rt Lt CAT NO. 222 7 8 Dolby Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj. 1 hf GAIN hf GAIN signal present Cat.
A-Chain Alignment Procedures Step No. 4-12 Indication n Action b. Optical Preamplifier Adjustments Rt Lt CAT NO. 222 9 10 11 REPEAT AND LR 9 8 OSCILLOSCOPE TRACE CAT. NO. 97 TEST FILM Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj. 1 hf GAIN hf GAIN signal present Rt Lt Cat.
A-Chain Alignment Procedures Step No. 4-14 Indication Action ✓ x x Out of phase Incorrect azimuth . . . . 0 0 0 0 5 5 5 5 . . . . 1 1 1 1 . . . . 2 2 2 2 . . . . 4 4 4 4 . . . . 8 8 8 8 1 1 1 1 . . . . 6 6 6 6 3 3 3 3 . . . . 1 1 1 1 5 5 5 5 6 6 6 6 .
A-Chain Alignment Procedures Step No. 4-16 Indication Action b. Optical Preamplifier Adjustments . . . . 0 0 0 0 5 5 5 5 . . . . 1 1 1 1 . . . . 2 2 2 2 . . . . 4 4 4 4 . . . . 8 8 8 8 1 1 1 1 . . . . 6 6 6 6 3 3 3 3 . . . . 1 1 1 1 5 5 5 5 6 6 6 6 . .
A-Chain Alignment Procedures Step No. 4-18 Indication Action 16 17 FOR PROJECTOR NO. 2 REPEAT 1 → 16 Rt Lt CAT NO. 222 Dolby Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj. 1 hf GAIN hf GAIN signal present Cat. No. 240A b. Optical Preamplifier Adjustments A-Chain Alignment Procedures Notes 4-19 b.
c. Magnetic Preamplifier Adjustments Magnetic Alignment The CP65 in its normal configuration does not provide noise reduction for signals entering through the Magnetic/Aux input. However an optional configuration using Cat. No. 300 SR/A modules in place of the normal Cat.
Magnetic Alignment c. Magnetic Preamplifier Adjustments 7. Remove the Cat. No. 242 card and locate the reversible plug-in Magnetic Input Sensitivity header. 100mV in 1V in The CP65 accepts a nominal operating input level of either 100 mV or 1V — chosen by the position of the reversible plug-in header.
SECTION 5 B-CHAIN ALIGNMENT 5-1.
B-Chain Alignment Procedures Action Indication Step No. 5-2 a. Setting Room Equalization NORMAL BYPASS bypass (switch behind panel) 1 CINEMA EQUALIZER MODULE CAT. No. 64B Dolby Laboratories Inc. San Francisco and London. L CINEMA EQUALIZER MODULE CAT.
B-Chain Alignment Procedures Action Indication Step No. 5-4 a. Setting Room Equalization 4 5 Cat. No. 85 Cat. No. 150 B-Chain Alignment Procedures Notes 5-5 Remove the Cat. No. 150 Card. Note that when the Cat. No. 150 card is removed, two card edge connectors are exposed on the backplane and that another slot to the immediate left of the Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-6 a. Setting Room Equalization 5 CONT'D NORMAL BYPASS bypass (switch behind panel) 6 7 ON PO WER AMP B-Chain Alignment Procedures Notes 5-7 Set all the gain controls on all power amplifiers to a known repeatable setting, but do not turn amplifiers on.
B-Chain Alignment Procedures Action Indication Step No. 5-8 0 1 2 3 4 5 6 7 8 9 10 select local/remote mute local active a. Setting Room Equalization 0 1 2 3 4 5 6 7 8 9 10 NORMAL BYPASS 0 1 2 3 4 5 6 7 8 9 10 select local/remote mute local active 04 Dolby Stereo A-type auto subwoofer o f f C A T .
B-Chain Alignment Procedures Action Indication Step No. 5-10 a. Setting Room Equalization 12 13 → 12 11 REPEA T Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat. No. 242 Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-12 a. Setting Room Equalization bypass (switch behind panel) NORMAL BYPASS NORMAL BYPASS 04 Dolby Stereo A-type 14 15 .05 .1 .2 .4 .8 1.6 3.15 6.3 12.5 kHz dB –10 +5 0 –5 +10 2.0 8.0 B-Chain Alignment Procedures Notes 5-13 a.
B-Chain Alignment Procedures Action Indication Step No. 5-14 a. Setting Room Equalization .05 .1 .2 .4 .8 1.6 3.15 6.3 12.5 kHz dB –10 +5 0 –5 +10 2.0 8.0 .05 .1 .2 .4 .8 1.6 3.15 6.3 12.5 kHz dB –10 +5 0 –5 +10 2.0 8.0 16 ✓ X X 17 x Do not adjust B-Chain Alignment Procedures Notes 5-15 a.
B-Chain Alignment Procedures Action Indication Step No. 5-16 18 19 20 a. Setting Room Equalization Paul B-Chain Alignment Procedures Notes 5-17 a. Setting Room Equalization When equalization is completed, the average of the 27 third-octave band controls should be approximately 12 o’clock (not mostly up or down).
B-Chain Alignment Procedures Action Indication Step No. 5-18 a. Setting Room Equalization b. Adjusting L,C,R Gain 0 1 2 3 4 5 6 7 8 9 10 21 22 23 0 1 2 3 4 5 6 7 8 9 10 b. Adjusting L,C,R Gain 1 REPEAT L R 14 → 21 14 → 21 Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-20 Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat. No. 242 c. Setting Mono Gain 1 MIDPOINT 2 01 Mono Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-22 0 1 2 3 4 5 6 7 8 9 10 select local/remote mute local active auto subwoofer of f CA T . NO. 441 1 2 3 d. Subwoofer Alignment (Cat. No. 441) 10 Dolby Stereo Digital B-Chain Alignment Procedures Notes 5-23 d.
B-Chain Alignment Procedures Action Indication Step No. 5-24 4 5 6 7 d. Subwoofer Alignment (Cat. No. 441) Dolby n-sync surr gain Q on present signal gnd gain bass Q mid freq cut treble tp bass Q freq mid cut treble gain mag/dig opt gain off auto freq cut tp present signal Subwoofer Left Surround Right Surround Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-26 8 9 10 d. Subwoofer Alignment (Cat. No. 441) Dolby n-sync surr gain Q on present signal gnd gain bass Q mid freq cut treble tp bass Q freq mid cut treble gain mag/dig opt gain off auto freq cut tp present signal Subwoofer Left Surround Right Surround Cat.
B-Chain Alignment Procedures Action Indication Step No. 5-28 .05 .1 .2 .4 .8 1.6 3.15 6.3 12.5 kHz dB –10 +5 0 –5 +10 CENTER CHANNEL NOTE THIS LEVEL 11 1 12 auto subwoofer off CA T . NO. 441 13 d. Subwoofer Alignment (Cat. No. 441) REPEAT → 8 10 auto subwoofer off CA T .
B-Chain Alignment Procedures Action Indication Step No. 5-30 .05 .1 .2 .4 .8 1.6 3.15 6.3 12.5 kHz dB –10 +5 0 –5 +10 .05 .1 .2 .4 .8 1.6 3.15 6.3 12.
B-Chain Alignment Procedures Action Indication Step No. 5-32 e. Surround Equalization Alignment (Cat. No. 441) 1 2 OFF RIGHT 3 85 dBC STEREO SURROUND 88 dBC MONO SURROUND Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
Action Indication Step No. 5-34 B-Chain Alignment Procedures e. Surround Equalization Alignment (Cat. No. 441) 3 5 4 Dolby n-sync surr gain Q on present signal gnd gain bass Q mid freq cut treble tp bass Q freq mid cut treble gain mag/dig opt gain off auto freq cut tp present signal Subwoofer Left Surround Right Surround Cat.
Action Indication Step No. 5-36 B-Chain Alignment Procedures e. Surround Equalization Alignment (Cat. No. 441) 6 9 REPEAT 6 → 8 8 7 Dolby n-sync surr gain Q on present signal gnd gain bass Q mid freq cut treble tp bass Q freq mid cut treble gain mag/dig opt gain off auto freq cut tp present signal Subwoofer Left Surround Right Surround Cat.
Action Indication Step No. 5-38 B-Chain Alignment Procedures 85 dBC STEREO SURROUND 88 dBC MONO SURROUND e. Surround Equalization Alignment (Cat. No. 441) 10 1 13 REPEAT 3 → 10 1 12 85 dBC Dolby n-s.
Action Indication Step No. 5-40 B-Chain Alignment Procedures = 17 e. Surround Equalization Alignment (Cat. No. 441) 16 bypass (switch behind panel) NORMAL BYPASS 14 15 10 Dolby Stereo Digital NORMAL BYPASS Cat. No. 150 Cat. No. 85 B-Chain Alignment Procedures Notes 5-41 e.
f. Adjustment of Surround Delay 5-42 B-Chain Alignment Procedures The CP65 incorporates a delay line in the surround channel to ensure that sound from the rear of the theatre arrives at the listeners’ ears approximately 20 milliseconds after the arrival of sound from the front speakers.
Action Indication Step No. 5-44 B-Chain Alignment Procedures g. Adjustment of Bypass Gain NORMAL BYPASS 1 2 3 4 0 1 2 3 4 5 6 7 8 9 10 select local/remote mute local active xx dBC 04 Dolby Stereo A-type D olb y Rt Lt Lt Rt gnd Proj. 2 hf GAIN hf GAIN Rt tp Rt Lt Lt tp Proj.
Action Indication Step No. 5-46 B-Chain Alignment Procedures NORMAL BYPASS bypass (switch behind panel) g. Adjustment of Bypass Gain 6 7 5 Dolby 15V 15V 24V gain bypass status supply power Cat. No. 249 O FF 80 7 0 6 0 50 40 3 0 xx dBC -3 dB yy dBC FROM 4 ➝ B-Chain Alignment Procedures Notes 5-47 g.
Action Indication Step No. 5-48 B-Chain Alignment Procedures 60 non-sync 1 4 2 4 3 NORMAL BYPASS 0 1 2 3 4 5 6 7 8 9 10 select local/remote mute local active h.
Action Indication Step No. 5-50 B-Chain Alignment Procedures h. Adjustment of Non-sync Gain 5 6 D olby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
Action Indication Step No. 5-52 B-Chain Alignment Procedures i. Adjustment of Mono Gain and Equalization 1 NORMAL BYPASS 2 01 Mono 3 4 Dolby gain mono non-sync gain points test mono eq Ls R C L Ls R C L gnd Ls R C L R L signal present Cat.
Action Indication Step No. 5-54 B-Chain Alignment Procedures j. Final Checks NORMAL BYPASS 1 4 NORMAL BYPASS 3 04 Dolby Stereo A-type 2 JIFFY TEST FILM CN 251–A subjective film for testing theatre sound DOLBY STEREO Running time: 8 minutes. Picture format: 1.
6-1 SECTION 6 REFERENCE DIAGRAMS.
Cat. No. 22 2 Dual Noise Reductio n M odule.
CAT. NO. 240A OPTICAL PRE-AMPLIFIER CARD Slit Loss EQ Indicator power P1 LED P2 LED 25 Hz-18 kHz 25 Hz-18 kHz Slit Loss EQ Slit Loss EQ Slit Loss EQ 6 7 Proj 1 Left - + 2 1 Proj 2 Left - + B C Proj 1 .
Cat. No. 24 1 Opt ical B ass E xten sion and S urro und E qualiz er Car d.
Cat. No. 242 B -Chai n F acilities Car d.
Cat. No. 249 P ower Suppl y Ca r d.
Cat. No. 259 Tran sf or m er Mo dul e.
CAT. NO. 441 SURROUND EQUALIZER, SUBWOOFER AND DIGITAL INPUT CARD C T S R 10 11 12 B 3 + + + + + A 180 Hz 180 Hz 100 Hz 50 Hz 20 kHz M L D H EQ EQ Downward Expander EQ Fader Fader 8 1 7 SUBWOOFER SURR.
Ca t. N o. 4 43 Contro l Lo gic Card.
6-12 Note: The Cat. No. 384 operates from + and – 8V. These voltages are created from the + and – 15V rails by regulators IC3 and IC4, mounted at the lower right hand corner of the backplane.
A.1 APPENDIX A CHECKING PHASING OF SPEAKERS Loudspeakers are two-wire devices that can be connected incorrectly as well as correctly. Incorrectly wired loudspeakers in a multiple-speaker installation cause degraded performance. For example, woofers in an array must work together to generate a solid wavefront of sound pressure.
B.1 APPENDIX B EFFECT OF CHANGES IN SLIT HEIGHT ON SLIT LOSSES The slit has a finite height that cannot be reduced without a simultaneous reduction in the light output and, thus, the electrical output of the system. The exciter lamp supply output could be increased in an effort to compensate, but this would shorten the life of the lamp.
C-1 APPENDIX C CP65M (MONO) INSTRUCTIONS 1. Operation The CP65 can be configured for mono-only operation. Systems so equipped are shipped with only the center channel Cat. No. 64 house equalization module and without the Cat. No. 150 surround decoder module and Cat.
C.2 Sch ematic Cat. No. 3 27A A3C2 98 4 re v 2.
D.1 APPENDIX D BACKPLANE CONNECTIONS LIST CP65 Backplane Connections T erminal Block TB1 T erminal Block TB2 1 Left non-sync i/p 1 [automation select] projector changeover 2 Right non sync i/p 2 ground 3 ground 3 Cat. No. 122 connection “C” 4 S0 [automation select] fmt 01 Mono 4 Cat.
D.2 D connector J18 1 S0 [automation select] fmt 01 Mono 2 S1 [automation select] fmt 04 Dolby A-type 3 S2 [automation select] fmt 05 Dolby SR [optical] 4 S3 [automation select] fmt 60 non-sync via ma.
An important point after buying a device Dolby Laboratories CP65 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Dolby Laboratories CP65 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Dolby Laboratories CP65 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Dolby Laboratories CP65 you will learn all the available features of the product, as well as information on its operation. The information that you get Dolby Laboratories CP65 will certainly help you make a decision on the purchase.
If you already are a holder of Dolby Laboratories CP65, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Dolby Laboratories CP65.
However, one of the most important roles played by the user manual is to help in solving problems with Dolby Laboratories CP65. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Dolby Laboratories CP65 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
