Dolby Laboratories
CP65
manual
Section Chain Alignment
Ad
Section Reference Diagrams
Adjustment of Surround Delay
HUM Problems
Connector J18
Preliminary Procedures
Do not adjust
Voltage Setting Fuse Type
Cat. No , Power Supply Module
Page 39
5-1
SECTION 5
B-CHAIN
ALIGNMENT
Page 38
Page 40
Image 39
Page 38
Page 40
Contents
Model CP65 Cinema Processor
Dolby Laboratories Inc Headquarters
Table of Contents
Section Reference Block Diagrams
Introduction
Page
Section Equipment Required
Jiffy Test Film Cat. No 2 Listen . . . Film Cat. No
Smpte Buzz Track Stereo Optical Surround Level Cat. No
Section Initial SET-UP and Installation
Voltage Acceptable Setting Voltage Range Fuse Type
Next, check the jumpers in the following locations
Cat. No , B-Chain Card
Cat. No , Power Supply Module
J2 NON-SYNC
Cat. No , Control Logic Card
Standard CP65 or CP65A
CP65 Backplane
CP65-300
High Low Subwoofer subwoofer Output output
These Modules are Necessary for Bypass Operation
Channel Decoder
Slot Card Function Cat. No
Two-channel Noise
Reduction Module
Contains a semi-regulated power supply with
International
Voltage Setting Fuse Type
IEC Notices
Room lighting dimmer controls SCR-TYPE
HUM Problems
Page
Aligning the B-Chain
Section AN Overview of the Alignment Procedure
Page
Page
Section Chain Alignment
Action Indication
Preliminary Procedures
Lamp Voltage
Optical Preamplifier Adjustments
Chain Alignment Procedures Optical Preamplifier Adjustments
222
CAT. no Test Film
Oscilloscope Traces
Repeat
Repeat 1 →
CAT no
Magnetic Preamplifier Adjustments Magnetic Alignment
100mV
Section Chain Alignment
Bypass
Setting Room Equalization
Loudspeakers and Crossovers
General
Amplifiers
Off
Chain Alignment Procedures
Action
Repeat
Chain Alignment Procedures Setting Room Equalization
Do not adjust
Paul
14 → 21 R 14 →
Setting Room Equalization b. Adjusting L,C,R Gain
79 dBC
Setting Mono Gain
Chain Alignment Procedures Subwoofer Alignment Cat. No
85 dBC
90 dBC
Step No
From
Select format 04 Dolby Stereo A-Type
441
Same AS
Surround Equalization Alignment Cat. No
Cat. No 441
Surround Equalization Alignment Cat. No Notes
Desired
88 dBC
Bypass
Adjustment of Surround Delay
Thumbwheel Switch
Msec Setting
Xx dBC
Chain Alignment Procedures Adjustment of Bypass Gain
Xx dBC -3 dB Yy dBC
From
Press the format 60 non sync switch
Adjustment of Non-sync Gain
Auto Freq
Repeat page 5-20 Step
Adjustment of Mono Gain and Equalization Notes
Press the format 04 Dolby Stereo A-type switch
Chain Alignment Procedures Final Checks
Section Reference Diagrams
Cat. No Dual Noise Reduction Module
Inputs
Cat. No Optical Bass Extension and Surround Equalizer Card
Cat. No B-Chain Facilities Card
Cat. No Power Supply Card
Cat. No Transformer Module
Inputs
Cat. No Control Logic Card
Cat. No +24V +15V
15V +12B
+15M
Appendix a Checking Phasing of Speakers
Appendix B Effect of Changes in Slit Height on Slit Losses
Appendix C CP65M Mono Instructions
Operation
Cat. No a Circuit Description
Schematic Cat. No a
Terminal Block TB3
Appendix D Backplane Connections List
Connector J18
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