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Author Topic: circuit diagram for changeover p1 and p2 Victor Garcia Film Handler Posts: 13 From: Mexico city, Mexico Registered: Aug 2012 posted 02-01-2013 07:46 PM                     Has anyone a Circuit Drawing for the changeover p1 and p2 for CP650?  |  IP: Logged Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 02-03-2013 11:04 AM                     Hi Victor, have you checked the manual in the warehouse (page 24), Or are you seeking something else? C.  |  IP: Logged Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 02-03-2013 02:28 PM                        There is a contact closure for projector 1 and 2 for analog. The schematic is in the manual. You can use a latch relay to hold projector 2. For digital, you would need motor relays to tell the 650 that another projector is about to come on screen. This is totally separate for the analog wiring. Bernie  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 02-03-2013 02:48 PM                        With the CP650, you can just use momentary contacts to select either projector 1 or projector 2. This can be as simple as pushbuttons next to each machine. No relay needed. Alternatively, a held contact can be used to select projector 2, as with previous Dolby processors, but for some reason people here have recommended against that. The only disadvantage that I am aware of to the momentary-contact method is that, at powerup, the CP650 will always have either projector 1 or projector 2 selected (this is configurable with the DIP switches under the front-panel door). This may or may not be in sync with the picture changeover position. You may or may not care about this. And, yes, the motor-start relays are for SRD only.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-03-2013 09:35 PM                        The motor start relays are not optional for digital. On the CP-500: maintained analogue contact will not always work. If you end up on #2, powering down and powering up on the 500 will result in no sound. Pulse to #1 and then back to #2 and you will have sound. Note I do not know if this is so for the 650 as well. Louis  |  IP: Logged Victor Garcia Film Handler Posts: 13 From: Mexico city, Mexico Registered: Aug 2012 posted 02-04-2013 07:43 PM                     thanks friends!!  |  IP: Logged

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