Dolby Laboratories CP500 Quick start guide

!Information

Issue 02

Part No. 91497

S98/11512/12084

Dolby Laboratories Inc.

U.S.A. 100 Potrero Avenue •San Francisco, CA 94103 •Telephone 415-558-0200 •Facsimile 415-863-1373 •Web: www.dolby.com

U.K. Wootton Bassett •Wiltshire SN4 8QJ •England •Telephone +44-(0)1793-842100•Facsimile +44-(0)1793-842101

Model CP500 Cinema Processor

Reference Diagrams

Grounding Details

Installation Wiring

Connector Pin Assignments

System Block Diagram

Card Locations and Signal Flow

Menu Structure

Proper Grounding of Equipment

(For non-EC countries only)

In the past it was assumed that if the units were mounted in the same rack that they would

be bonded together by way of the rack rails to the mounting ears. The paint used on

professional products has gotten much better in the last few years and this assumption is

generally no longer true. To ensure a good ground connection between units in the rack

and therefore a quiet system with no hum or noise it is highly recommended installing at

least one star washer for every piece of equipment. Insulating nylon or plastic washers

on the rack screws should not be used with the star washer. See figure below:

To optimize the grounding of the system you must add a jumper between signal ground

of the CP500 and the chassis. See figure below:

Connection of ground jumper and amplifier

Most projectors sold in North America come with the new reverse scan LED analog

soundhead readers installed. In addition, many existing projectors are being upgraded to

include this superior method of playing back SVA soundtracks. The output of the solar

cell from this system is at a somewhat lower level than a normal incandescent exciter

lamp solar cell. In order to provide the correct signal level for the cinema processor a

small preamp board is needed and is mounted in the soundhead.

Since this is an active circuit it must have its signal ground connected to the cinema

processor ground for correct operation. Failure to connect the board ground to the

cinema processor can result in a noisy optical system or no sound at all. In some

instances the signal ground from the board has been connected to the ground of the

projector; this method should be avoided as it is not the best way to make this connection

The preferred way is to connect the shield at both ends of the signal path. See figure

below:

Proper connection of Reverse Scan

LED Readers to Cinema Processor

APPENDIX C

BACKPLANE CONNECTORS / REFERENCE DIAGRAMS

CP500 Backplane Connector Pin Assignments

1. Automation Connector:

Number Function

1 SK1 Format Select Input

2 SK2 Format Select Input

3 SK3 Format Select Input

4 SK4 Format Select Input

5 SK5 Format Select Input

6 SK6 Format Select Input

7 SK7 Format Select Input

8 SK8 Format Select Input/or

STEP (in Automation Sequential mode)

9 Mute On/Off Input

18 Format Status Bit 0

19 Format Status Bit 1

20 Format Status Bit 2

25 Projector Status Output

12 Signal Ground

2. Serial Data Connector:

Number Signal Name

1N/C

2 Transmitted Data

3 Received Data

4 Looped back to pin 6

5 Signal Ground

6 Looped back to pin 4

7 Looped back to pin 8

8 Looped back to pin 7

9N/C

3. Motor Start Connector:

Number Signal Name

1 Motor Start Relay, Proj 1

2 Proj 1 Changeover, pulsed contacts

3 Changeover relay, closed selects Proj 2

4 Proj 2 Changeover, pulsed contacts

5 Ground

6N/C

7N/C

8N/C

9 Motor Start Relay, Proj 2

C-2

4. Bypass / Remote Connector:

Number Signal Name

1 Bypass Power Transformer Connection, 16-18 Vac

2 Bypass Power Transformer Connection, 16-18 Vac

3 Remote Control Unit V+

4 Remote Control Unit Data

5 Remote Control Unit Ground

6 Remote Auditorium Fader +

7 Remote Auditorium Fader Ground

8N/C

5. Main / LF Output Connector:

Number Signal Name

1 Left Channel

2 Signal Ground

3 Right Channel

4 Signal Ground

5 Center Channel

6 Signal Ground

7 Left Surround Channel

8 Signal Ground

9 Right Surround Channel

10 Signal Ground

11 Sub Woofer Channel

12 Signal Ground

13 Hearing Impaired Channel

14 Signal Ground

15 Mono Surround Channel

6. Crossover Output Connector (Used With Cat. No. 683 Installed):

Number Signal Name

1 Left Channel HF

2 Signal Ground

3 Right Channel HF

4 Signal Ground

5 Center ChannelHF

6 Signal Ground

7 Left Surround Channel LF

8 Signal Ground

9 Right Surround Channel LF

10 Signal Ground

C-3

7. Optical 1 Input Connector:

Number Signal Name

1 Projector 1 Left Channel +

2 Projector 1 Left Channel -

3 Signal Ground

4 Projector 1 Right Channel +

5 Projector 1 Right Channel -

6 Signal Ground

7N/C

8N/C

9 Signal Ground

8. Optical 2 Input Connector:

Number Signal Name

1 Projector 2 Left Channel +

2 Projector 2 Left Channel -

3 Signal Ground

4 Projector 2 Right Channel +

5 Projector 2 Right Channel -

6 Signal Ground

7N/C

8N/C

9 Signal Ground

9. Mic. Input Connector:

Number Signal Name

1Mic1+

2Mic1-

3 Mic2 signal

4 Mic2 ground

5N/C

6 Mic1 ground

7 Mic Multiplexer V+

8 Mic Multiplexer Gnd

9 Mic Multiplexer Data

C-4

10. Accessory Rack Analog Connector:

Number Signal

Name Signal Description

1 AccOptByp Mono input to Cat 682 for Bypass

Operation

2 X15 Direct Input to Cat 682

3 X14 Direct Input to Cat 682

4 X13 Direct Input to Cat 682

5 X12 Direct Input to Cat 682

6 X11 Direct Input to Cat 682

7 X10 Direct Input to Cat 682

8 AccSW Ouput to Acc Rack from Cat 662

9 AccC Ouput to Acc Rack from Cat 662

10 AccRS Ouput to Acc Rack from Cat 662

11 AccLS Ouput to Acc Rack from Cat 662

12 AccR Ouput to Acc Rack from Cat 662

13 AccL Ouput to Acc Rack from Cat 662

14 AccNRS Input to noise reduction resources*

15 AccNRC Input to noise reduction resources*

16 AccNRRe Input to noise reduction resources*

17 AccNRLe Input to noise reduction resources*

18 AccNRR Input to noise reduction resources*

19 AccNRL Input to noise reduction resources*

20 Ground Signal Ground

21 Ground Signal Ground

22 Ground Signal Ground

23 Ground Signal Ground

24 Ground Signal Ground

25 Ground Signal Ground

26 Ground Signal Ground

27 Ground Signal Ground

28 Ground Signal Ground

29 Ground Signal Ground

30 +13VDC Power Supply

31 +13VDC Power Supply

32 -12VDC Power Supply

33 -12VDC Power Supply

34 Ground Signal Ground

35 OPTBUSSR Optical Pre Amp Output Right

Channel

36 Ground Signal Ground

37 OPTBUSSL Optical Pre Amp Output Left Channel

*Dolby Level is 388 mV.

C-5

11. Accessory Rack Digital Connector:

Number Signal

Name Signal Description

1 Signal

Ground Signal Ground

2 OPTLRCK Left / Right Clock from Optical A/D

3 RETSD2 Serial Data 2 Return

4 RETSD1 Serial Data 1 Return

5 RETSD0 Serial Data 0 Return

6 RETWCK Word Clock Return

7 RETBCK Serial Bit Clock Return

8 ACCBAUD Baud Rate Clock

9 ACCLINK Accessory Rack Present

10 RET256FS 256 X Sample Rate Clock Return

11 ACCRXD Accessory Rack Received Data

12 ACCTXD Accessory Rack Trasmitted Data

13 Signal

Ground Signal Ground

14 OPTBCK A/D Bit Clock form Optical A/D

15 OPTDAT Serial Data from Optical A/D

16 RETOPTD

AT1 Spare Data Line 1

17 RETOPTD

AT2 Spare Data Line 2

18 !ACCEN Enable Accessory Rack

19 ACCSD2 Accessory Rack Serial Data 2

20 ACCWCK Accessory Rack Word Clock

21 ACCBCK Accessory Rack Bit Clock

22 ACCSD1 Accessory Rack Serial Data 1

23 ACC256FS Accessory Rack 256 X Sample Rate

Clock

24 ACCSD0 Accessory Rack Serial Data 0

25 ACC512FS Accessory Rack 512 X Sample Rate

Clock

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