Manuals / Dolby Laboratories / Home Audio / Stereo Amplifier

Dolby Laboratories CP65 manual Cat. No Control Logic Card

Models: CP65

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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

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Cat. No. 443 Control Logic Card

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Dolby Laboratories CP65 manual Cat. No Control Logic Card

Page 74 Page 76

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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. NoTwo-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 ProblemsPage Aligning the B-Chain Section AN Overview of the Alignment ProcedurePage 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 SwitchMsec 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 OperationCat. No a Circuit Description Schematic Cat. No a Terminal Block TB3 Appendix D Backplane Connections List Connector J18

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