Model CP65 Cinema Processor
Installation and Alignment Instructions
U.K. European Office
Dolby Laboratories Inc U.S. Headquarters
Dolby Laboratories Inc
100 Potrero Avenue San Francisco, CA Telephone
INITIAL SET-UPAND INSTALLATION
Table of Contents
INTRODUCTION
EQUIPMENT REQUIRED
APPENDIX B
APPENDIX A
APPENDIX C
APPENDIX D
CP65
INTRODUCTION
04 Dolby Stereo A-type 05 Dolby Stereo SR
60 Non-sync
Page
1 Dolby Tone and Pink Noise - Cat. No
SECTION EQUIPMENT REQUIRED
2 1kHz, 100% Modulation, Left/Right - Cat. No
3SMPTE Buzz Track
TEST FILM
4Stereo Optical Surround Level - Cat. No
JIFFY
SECTION INITIAL SET-UPAND INSTALLATION
Voltage
Setting
Acceptable
Voltage Range
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 Descriptions
selected projector. Electronic switches select
Slot
Card
Reduction Module
Two-channelNoise
2 4 Channel Decoder
7,8,9
Card
Slot
Function
Cat. No
International
Voltage Setting
Fuse
Type
GB F D I E S NL
IEC NOTICES
IMPORTANT SAFETY NOTICE
IMPORTANT - NOTE DE SECURITE
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
a. Preliminary Procedures Notes
a. Preliminary Procedures
Action
Indication
a. Preliminary Procedures
A-ChainAlignment Procedures
a. Preliminary Procedures Notes
Action
b. Optical Preamplifier Adjustments Notes
b. Optical Preamplifier Adjustments
Action
Indication
b. Optical Preamplifier Adjustments
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments Notes
Action
CAT NO
L L R R L L R R
b. Optical Preamplifier Adjustments
b. Optical Preamplifier Adjustments Notes
Indicationn
Action
CAT. NO. 97 TEST FILM
REPEAT
RTA DISPLAY
OSCILLOSCOPE TRACES
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments
REPEAT
12 AND
A-ChainAlignment Procedures
b. Optical Preamplifier Adjustments
FOR PROJECTOR NO. REPEAT 1 →
CAT NO
b. Optical Preamplifier Adjustments
b. Optical Preamplifier Adjustments Notes
Magnetic Alignment
c. Magnetic Preamplifier Adjustments
c. Magnetic Preamplifier Adjustments
A-ChainAlignment Procedures
Magnetic Alignment
SECTION B-CHAINALIGNMENT
a. Setting Room Equalization Notes
a. Setting Room Equalization
bypass
Action
a. Setting Room Equalization
Loudspeakers and Crossovers
a. Setting Room Equalization Notes
Action
Amplifiers
bypass
General
a. Setting Room Equalization
a. Setting Room Equalization Notes
B-ChainAlignment Procedures
Action
Indication
a. Setting Room Equalization
REPEAT
a. Setting Room Equalization Notes
Action
a. Setting Room Equalization
B-ChainAlignment Procedures
a. Setting Room Equalization Notes
Action
a. Setting Room Equalization
Do not adjust
a. Setting Room Equalization Notes
Action
a. Setting Room Equalization Notes
a. Setting Room Equalization
Action
Indication
b.Adjusting L,C,R Gain
b. Adjusting L,C,R Gain
L 14 → 21 R 14 →
22REPEAT
c. Setting Mono Gain Notes
c. Setting Mono Gain
79 dBC
Action
d. Subwoofer Alignment Cat. No. Notes
d. Subwoofer Alignment Cat. No
B-ChainAlignment Procedures
Action
B-ChainAlignment Procedures
90 dBC
d. Subwoofer Alignment Cat. No
Action
d. Subwoofer Alignment Cat. No
FROM
d. Subwoofer Alignment Cat. No
Action
d. Subwoofer Alignment Cat. No
Select format 04 Dolby Stereo A-Type
Action
REPEAT
d. Subwoofer Alignment Cat. No
SAME AS
d. Subwoofer Alignment Cat. No
Action
e. Surround Equalization Alignment Cat. No
Re S
e. Surround Equalization Alignment Cat. No
Action
Action
e. Surround Equalization Alignment Cat. No
Action
e. Surround Equalization Alignment Cat. No
REPEAT
e. Surround Equalization Alignment Cat. No
88 dBC
Action
e. Surround Equalization Alignment Cat. No
B-ChainAlignment Procedures
Action
Indication
Thumbwheel Switch
f. Adjustment of Surround Delay
msec
Setting
g. Adjustment of Bypass Gain Notes
g. Adjustment of Bypass Gain
xx dBC
B-ChainAlignment Procedures
B-ChainAlignment Procedures
FROM xx dBC -3dB yy dBC
g. Adjustment of Bypass Gain
g. Adjustment of Bypass Gain Notes
h. Adjustment of Non-syncGain Notes
h. Adjustment of Non-syncGain
Press the format 60 non sync switch
Action
h. Adjustment of Non-syncGain Notes
h. Adjustment of Non-syncGain
Action
Indication
i.Adjustment of Mono Gain and Equalization Notes
i. Adjustment of Mono Gain and Equalization
5REPEAT PAGE 5-20STEP
B-ChainAlignment Procedures
JIFFY TEST FILM
Press the format 04 Dolby Stereo A-type switch
j. Final Checks
j. Final Checks Notes
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
Cat. No
CP65 POWER DISTRIBUTION TABLE
+24V
+15V
APPENDIX A CHECKING PHASING OF SPEAKERS
5,000
Frequency in Hz
10,000
20,000
1.Operation
APPENDIX C CP65M MONO INSTRUCTIONS
2.Cat. No. 327A Circuit Description
A3C2984 rev
C.2 Schematic Cat. No. 327A
CP65 Backplane Connections
APPENDIX D BACKPLANE CONNECTIONS LIST
Terminal Block TB1
Terminal Block TB2
D connector J18