Model CP65 Cinema Processor
Installation and Alignment Instructions
100 Potrero Avenue San Francisco, CA Telephone
Dolby Laboratories Inc U.S. Headquarters
U.K. European Office
Dolby Laboratories Inc
EQUIPMENT REQUIRED
Table of Contents
INITIAL SET-UPAND INSTALLATION
INTRODUCTION
APPENDIX D
APPENDIX A
APPENDIX B
APPENDIX C
60 Non-sync
INTRODUCTION
CP65
04 Dolby Stereo A-type 05 Dolby Stereo SR
Page
1 Dolby Tone and Pink Noise - Cat. No
SECTION EQUIPMENT REQUIRED
2 1kHz, 100% Modulation, Left/Right - Cat. No
JIFFY
TEST FILM
3SMPTE Buzz Track
4Stereo Optical Surround Level - Cat. No
SECTION INITIAL SET-UPAND INSTALLATION
Voltage Range
Setting
Voltage
Acceptable
Cat. No
Cat. No. 242, B-ChainCard
Cat. No. 249, Power Supply Module
J5 J6 J7 J8
J3 IN
Cat. No. 443, Control Logic Card
Standard CP65 or CP65A
CP65 Backplane
CP65-300
In a CP65-300when 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-typedecoded when the Mag/Aux format is selected. With J24 in the “NO NR” position signals pass through the noise reduction modules but the processing will be turned off. If both of these processing options are required frequently an external switch may be connected to J24
J1 Optical Bass Extension output level sets the output level range for the subwoofer channel. In the HIGH position J1 is set at the factory for a power amplifier input sensitivity of between 90 mV and 1.23 V. If the power amplifiers used in the installation are very sensitive 10 mV to 100 mV input sensitivity, it may be necessary to set J1 to the LOW position. If you are unsure of the sensitivity of your power amplifiers set J1 to the LOW position initially. If the high output position is required this will be determined during OBE alignment
Card
selected projector. Electronic switches select
Card Descriptions
Slot
7,8,9
Two-channelNoise
Reduction Module
2 4 Channel Decoder
Cat. No
Slot
Card
Function
Type
Voltage Setting
International
Fuse
IMPORTANT - NOTE DE SECURITE
IEC NOTICES
GB F D I E S NL
IMPORTANT SAFETY NOTICE
3.Room lighting dimmer controls SCR-TYPE
HUM PROBLEMS
Model CP65
With CP65 FADER turned up and format 04 selected
1. Aligning the A-Chain
SECTION AN OVERVIEW OF THE ALIGNMENT PROCEDURE
2. Aligning the B-Chain
and with a broad range of speakers. Accurate equalization requires the use of standardized acoustic measurement procedures
Many loudspeakers used in theatres are far from ideal and require boosting of the low- and high-frequencyextremes in order to produce an approximation of the standard reference response curve. Bass and treble controls-centeredon the turnover points of typical loudspeakers-liftthe ends of the spectrum without the need for large amounts of narrow- band boost from the third-octavecontrols in the Cat. No. 64 cards. The third-octavecontrols are used for minor adjustments that are required to smooth the frequency response curve
SECTION A-CHAINALIGNMENT
Indication
a. Preliminary Procedures
a. Preliminary Procedures Notes
Action
Action
A-ChainAlignment Procedures
a. Preliminary Procedures
a. Preliminary Procedures Notes
Indication
b. Optical Preamplifier Adjustments
b. Optical Preamplifier Adjustments Notes
Action
Action
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments
b. Optical Preamplifier Adjustments Notes
b. Optical Preamplifier Adjustments Notes
L L R R L L R R
CAT NO
b. Optical Preamplifier Adjustments
REPEAT
Action
Indicationn
CAT. NO. 97 TEST FILM
b. Optical Preamplifier Adjustments
OSCILLOSCOPE TRACES
RTA DISPLAY
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments
12 AND
REPEAT
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments Notes
CAT NO
FOR PROJECTOR NO. REPEAT 1 →
b. Optical Preamplifier Adjustments
Magnetic Alignment
c. Magnetic Preamplifier Adjustments
c. Magnetic Preamplifier Adjustments
A-ChainAlignment Procedures
Magnetic Alignment
SECTION B-CHAINALIGNMENT
Action
a. Setting Room Equalization
a. Setting Room Equalization Notes
bypass
Action
Loudspeakers and Crossovers
a. Setting Room Equalization
a. Setting Room Equalization Notes
a. Setting Room Equalization
bypass
Amplifiers
General
Indication
B-ChainAlignment Procedures
a. Setting Room Equalization Notes
Action
Action
REPEAT
a. Setting Room Equalization
a. Setting Room Equalization Notes
Action
B-ChainAlignment Procedures
a. Setting Room Equalization
a. Setting Room Equalization Notes
Action
Do not adjust
a. Setting Room Equalization
a. Setting Room Equalization Notes
Indication
a. Setting Room Equalization
a. Setting Room Equalization Notes
Action
22REPEAT
b. Adjusting L,C,R Gain
b.Adjusting L,C,R Gain
L 14 → 21 R 14 →
Action
c. Setting Mono Gain
c. Setting Mono Gain Notes
79 dBC
Action
d. Subwoofer Alignment Cat. No
d. Subwoofer Alignment Cat. No. Notes
B-ChainAlignment Procedures
Action
90 dBC
B-ChainAlignment Procedures
d. Subwoofer Alignment Cat. No
Action
FROM
d. Subwoofer Alignment Cat. No
d. Subwoofer Alignment Cat. No
REPEAT
Select format 04 Dolby Stereo A-Type
d. Subwoofer Alignment Cat. No
Action
Action
SAME AS
d. Subwoofer Alignment Cat. No
d. Subwoofer Alignment Cat. No
Action
Re S
e. Surround Equalization Alignment Cat. No
e. Surround Equalization Alignment Cat. No
Action
e. Surround Equalization Alignment Cat. No
Action
e. Surround Equalization Alignment Cat. No
REPEAT
e. Surround Equalization Alignment Cat. No
88 dBC
Action
Indication
B-ChainAlignment Procedures
e. Surround Equalization Alignment Cat. No
Action
Setting
f. Adjustment of Surround Delay
Thumbwheel Switch
msec
B-ChainAlignment Procedures
g. Adjustment of Bypass Gain
g. Adjustment of Bypass Gain Notes
xx dBC
g. Adjustment of Bypass Gain Notes
FROM xx dBC -3dB yy dBC
B-ChainAlignment Procedures
g. Adjustment of Bypass Gain
Action
h. Adjustment of Non-syncGain
h. Adjustment of Non-syncGain Notes
Press the format 60 non sync switch
Indication
h. Adjustment of Non-syncGain
h. Adjustment of Non-syncGain Notes
Action
B-ChainAlignment Procedures
i. Adjustment of Mono Gain and Equalization
i.Adjustment of Mono Gain and Equalization Notes
5REPEAT PAGE 5-20STEP
j. Final Checks Notes
Press the format 04 Dolby Stereo A-type switch
JIFFY TEST FILM
j. Final Checks
SECTION REFERENCE DIAGRAMS
Cat. No. 222 Dual Noise Reduction Module
OUTPUTS
INPUTS
Page
Cat. No. 242 B-ChainFacilities Card
Cat. No. 249 Power Supply Card
Cat. No. 259 Transformer Module
OUTPUTS
INPUTS
Cat. No. 443 Control Logic Card
+15V
CP65 POWER DISTRIBUTION TABLE
Cat. No
+24V
APPENDIX A CHECKING PHASING OF SPEAKERS
20,000
Frequency in Hz
5,000
10,000
1.Operation
APPENDIX C CP65M MONO INSTRUCTIONS
2.Cat. No. 327A Circuit Description
A3C2984 rev
C.2 Schematic Cat. No. 327A
Terminal Block TB2
APPENDIX D BACKPLANE CONNECTIONS LIST
CP65 Backplane Connections
Terminal Block TB1
D connector J18