Manuals / Dolby Laboratories / Home Audio / Stereo Amplifier

Dolby Laboratories CP65 manual Schematic Cat. No a

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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C.2

Schematic Cat. No. 327A

A3C2984 rev 2

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Dolby Laboratories CP65 manual Schematic Cat. No a

Page 79 Page 81

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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 Smpte Buzz Track Stereo Optical Surround Level Cat. No Jiffy Test Film Cat. No 2 Listen . . . Film 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 , Power Supply Module Cat. No , B-Chain Card Cat. No , Control Logic Card J2 NON-SYNC CP65 Backplane Standard CP65 or CP65A CP65-300 High Low Subwoofer subwoofer Output output These Modules are Necessary for Bypass Operation Slot Card Function Cat. No Two-channel NoiseReduction Module Channel Decoder Contains a semi-regulated power supply with Voltage Setting Fuse Type International IEC Notices HUM Problems Room lighting dimmer controls SCR-TYPEPage Section AN Overview of the Alignment Procedure Aligning the B-ChainPage Page Section Chain Alignment Preliminary Procedures Action Indication Lamp Voltage Optical Preamplifier Adjustments Chain Alignment Procedures Optical Preamplifier Adjustments 222 CAT. no Test Film Oscilloscope Traces Repeat CAT no Repeat 1 → Magnetic Preamplifier Adjustments Magnetic Alignment 100mV Section Chain Alignment Setting Room Equalization Bypass Loudspeakers and Crossovers Amplifiers General Chain Alignment Procedures Off Repeat Action Chain Alignment Procedures Setting Room Equalization Do not adjust Paul Setting Room Equalization b. Adjusting L,C,R Gain 14 → 21 R 14 → Setting Mono Gain 79 dBC Chain Alignment Procedures Subwoofer Alignment Cat. No 90 dBC 85 dBC From Step No Select format 04 Dolby Stereo A-Type Same AS 441 Surround Equalization Alignment Cat. No Surround Equalization Alignment Cat. No Notes Cat. No 441 Desired 88 dBC Bypass Msec Setting Adjustment of Surround DelayThumbwheel Switch Chain Alignment Procedures Adjustment of Bypass Gain Xx dBC From Xx dBC -3 dB Yy dBC Adjustment of Non-sync Gain Press the format 60 non sync switch Auto Freq Adjustment of Mono Gain and Equalization Notes Repeat page 5-20 Step Chain Alignment Procedures Final Checks Press the format 04 Dolby Stereo A-type switch 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 +15M Cat. No +24V +15V15V +12B Appendix a Checking Phasing of Speakers Appendix B Effect of Changes in Slit Height on Slit Losses Cat. No a Circuit Description Appendix C CP65M Mono InstructionsOperation Schematic Cat. No a Appendix D Backplane Connections List Terminal Block TB3 Connector J18

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