Dolby Laboratories CP65 Slot Card Function Cat. No, Two-channel Noise, Reduction Module, Cat No

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Slot
No.	Card	Function
5	Cat. No. 222	Contains two channels of Dolby A-type noise
	Two-channel Noise	reduction circuitry with LED indicators to set
	Reduction Module	Dolby Level.
6	Cat. No. 150	Derives left, right, center, and surround
	2:4 Channel Decoder	information from the two optical tracks on the
	Card	film.
7,8,9	Cat. No. 64B	Contains treble and bass controls and 27
	Equalizer Module	third-octave equalizer controls. One card is used
		for each front channel: left, center, right.
10	Cat No. 441	(1) Provides equalization for the surround
	Surround Equalizer,	channels.
	Subwoofer card.	(2) Extracts low frequency information from the L,
		C, and R signals and sends this signal to a
		subwoofer output through an equalizer and a fader
		circuit.
		(3) Provides Subwoofer input for magnetic and
		digital soundtracks and Stereo Surround from a
		Dolby Digital adapter.
		Note: Cat. No. 241 may also be used in this
		position but does not provide (3) above.
11	Cat. No. 242	Contains the signal processing circuitry for the
	B-Chain Card	B-Chain except for the equalizers. Has input buffers
		and filters for non-sync, aux and magnetic sources,
		electronic switches to select input sources, a 4-
		channel fader circuit, and output level
		potentiometers for L,C,R,S.
12	Cat. No. 443	Configures the CP65 for the selected format.
	Control Logic Card	Also contains fader mute and fader local/remote
		status circuits. Generates control logic signals for
		other cards in the CP65. Its inputs are the Cat.
		No. 447 front panel controls, external remote
		boxes, or automation inputs to the CP65. It also
		contains a jumper block to enable the wake-up
		condition to be preselected.

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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. NoSection 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 CardCat. No , Control Logic Card J2 NON-SYNCCP65 Backplane Standard CP65 or CP65ACP65-300 High Low Subwoofer subwoofer Output output These Modules are Necessary for Bypass Operation Reduction Module Slot Card Function Cat. NoTwo-channel Noise Channel DecoderContains a semi-regulated power supply with Voltage Setting Fuse Type InternationalIEC 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 IndicationLamp 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 BypassLoudspeakers and Crossovers Amplifiers GeneralChain Alignment Procedures OffRepeat ActionChain 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 dBCChain Alignment Procedures Subwoofer Alignment Cat. No 90 dBC 85 dBCFrom Step NoSelect format 04 Dolby Stereo A-Type Same AS 441Surround Equalization Alignment Cat. No Surround Equalization Alignment Cat. No Notes Cat. No 441Desired 88 dBC Bypass Adjustment of Surround Delay Thumbwheel SwitchMsec Setting Chain Alignment Procedures Adjustment of Bypass Gain Xx dBCFrom Xx dBC -3 dB Yy dBCAdjustment of Non-sync Gain Press the format 60 non sync switchAuto Freq Adjustment of Mono Gain and Equalization Notes Repeat page 5-20 StepChain Alignment Procedures Final Checks Press the format 04 Dolby Stereo A-type switchSection 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 Appendix D Backplane Connections List Terminal Block TB3Connector J18