Dolby Laboratories CP65 manual These Modules are Necessary for Bypass Operation

Page 17

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STEP 10 If they are not already installed in the CP65 card cage, install all of the cards for your system as shown.

THESE MODULES ARE

NECESSARY FOR BYPASS

OPERATION

Cat. No.	Cat. No.	Cat. No.	Cat. No.	Cat. No.	Cat. No.	Cat. No.	Cat. No.
240A	240A	350 SR	350 SR	222	150	64	64
(spare)	optical	300 SR/A	300 SR/A	2-channel	2:4 ch	EQ	EQ
	preamp	450 A	450 A	A-type	decoder	L	C
		Lt	Rt	Lt/Rt
		(C)	(S)	(L,R)

Cat. No.

64

EQ

R

Cat. No.	Cat. No.	Cat. No.	Cat. No.
441	242	443	249
surround	B chain	control	voltage
and			regulator
subwoofer
signal	mono eq

Cat. No.

	259
transformer
module
normal	spare

Proj. 1

GAIN Lt

hf

GAIN Rt

hf Lt tp

Lt

signal present

Rt

Rt tp

GAIN Lt

hf

GAIN Rt

hf

Proj. 2 gnd

Dolby SR

Dolby SR

Lt

Rt

Dolby

L

signal C present R

S

delay	4

Lt tp

Rt tp

gnd

Dolby

Dolby

Dolby

Subwoofer

n-sync surr gain

Right SurroundLeft Surround

present		mono
	tp	gain	L
	on	non-sync
	cut		R
	cut
auto	freq		L
off	Q		L		24V
off			C	power
		signal		power
opt gain		signal		supply	15V
mag/dig		present R		status	15V
gain			Ls		15V
treble			Ls
treble		gnd
	cut	gnd
	cut		L
mid	freq		L
mid	freq
	Q	test	C
	Q	test
	bass	points	R
	tp		Ls
treble
	cut
mid	freq		L
	Q	gain	C		bypass
			R		bypass
	bass
	bass
	gain		Ls		gain
	gnd
signal
present

fuse
bypass	spare
fuse
normal	bypass
	(reset)

Card Descriptions:
Slot
No.	Card	Function
1	Slot for spare	Spare location for Cat. No. 240A (or the older
	Cat. No. 240A Card	Cat. No. 240).
2	Cat. No. 240A	Amplifies the outputs of the solar cell in the
	Optical Preamplifier	selected projector. Electronic switches select
	Card	projector No. 1 or 2. The older Cat. No. 240 may also
		be used.
3,4	Cat. No. 350	Each module contains a single channel
	Spectral recording	of Dolby spectral recording (SR) processing
	Modules	for optical soundtracks recorded with Dolby SR (Format
		05).

Note:

1)Some installations may use two Cat. No. 300 SR/A Processing modules in place of Cat. No. 350.

2)In CP65-A, Cat. No. 350/300 are not fitted and the slots are empty.

Image 17

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. NoSection 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 ModuleJ2 NON-SYNC Cat. No , Control Logic CardStandard CP65 or CP65A CP65 BackplaneCP65-300 High Low Subwoofer subwoofer Output output These Modules are Necessary for Bypass Operation Two-channel Noise Slot Card Function Cat. NoReduction Module Channel DecoderContains a semi-regulated power supply with International Voltage Setting Fuse TypeIEC 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 ProceduresLamp Voltage Optical Preamplifier Adjustments Chain Alignment Procedures Optical Preamplifier Adjustments 222 CAT. no Test Film Oscilloscope Traces Repeat Repeat 1 → CAT noMagnetic Preamplifier Adjustments Magnetic Alignment 100mV Section Chain Alignment Bypass Setting Room EqualizationLoudspeakers and Crossovers General AmplifiersOff Chain Alignment ProceduresAction RepeatChain Alignment Procedures Setting Room Equalization Do not adjust Paul 14 → 21 R 14 → Setting Room Equalization b. Adjusting L,C,R Gain79 dBC Setting Mono GainChain Alignment Procedures Subwoofer Alignment Cat. No 85 dBC 90 dBCStep No FromSelect format 04 Dolby Stereo A-Type 441 Same ASSurround Equalization Alignment Cat. No Cat. No 441 Surround Equalization Alignment Cat. No NotesDesired 88 dBC Bypass Msec Setting Adjustment of Surround DelayThumbwheel Switch Xx dBC Chain Alignment Procedures Adjustment of Bypass GainXx dBC -3 dB Yy dBC FromPress the format 60 non sync switch Adjustment of Non-sync GainAuto Freq Repeat page 5-20 Step Adjustment of Mono Gain and Equalization NotesPress the format 04 Dolby Stereo A-type switch Chain Alignment Procedures Final ChecksSection 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 Terminal Block TB3 Appendix D Backplane Connections ListConnector J18