Film-Tech Forum ARCHIVE: Elmo XP-550 Schematic

This is topic Elmo XP-550 Schematic in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=008897

Posted by Bernie Anderson Jr (Member # 410) on 08-27-2007, 03:46 PM:

I recently picked up a pair of Elmo XP-550 16mm projectors that I use as part of my rental equipment. I need to see if anyone has a schematic for the remote plug (i.e speficially which pin is for Forward and Changeover. Or if you know the pin configuration, that would work too. I need to make another C/O box.

Thanks

Bernie

Posted by Phil Hill (Member # 371) on 08-27-2007, 04:32 PM:

Below is the schematic from the maintenance manual for the remote control. I see nothing in the manual for the change-over. Note, accordingly to the overall machine schematic, pins 1 and 12 are apparently not used and have no internal connection.

I hope this helps.

Posted by Leo Enticknap (Member # 534) on 08-27-2007, 05:50 PM:

If I remember correctly, the changeover was done by a remote box, into which the remote leads from both projectors were connected. The changeover was accomplished by instantaneously killing the lamp in the outgoing machine and switching on the one in the incoming one when you pressed the changeover button on the box. Those portable 16mm projectors have no changeover shutter, so that's the only way you can do it. The changeovers looked pretty seamless, though.

Posted by Bernie Anderson Jr (Member # 410) on 08-27-2007, 06:33 PM:

Thanks Phil,

There is a C/O in this one and it opens up with the forward switch from the front panel but on the other pair that I have the changeover opens on a switch. So you can run the motor and then hit the changeover. I won't know until I open it up.

Thanks again

Bernie

Posted by Gordon McLeod (Member # 33) on 08-27-2007, 08:29 PM:

Some of the elmo's opened the dowser on 3 or 4 sec after the motor started on the remote and the outgoing machine closed at that point

Posted by Steve Guttag (Member # 268) on 08-28-2007, 06:42 AM:

On the Elmos I've worked with...the CX-550 there was a changeover douser but a changeover was always an external box sort of thing for both picture and sound. You could buy the ELMO box or make one yourself.

The Elmo box did as Gordon said...you pressed the changeover button and stood back...it would fire up the incoming machine and several seconds later, open the douser. You fed the speaker outputs of both machines into the box, which had loading resistors and relay for making the sound switch. It did all of its controlling via the remote connectors.

Alternately, you were free to do it yourself using just switches. I think the CX550 manual is online (it is in the user manual for the CX350/550) which may give clues to the remote pinout with a changeover.

Steve

Posted by Bernie Anderson Jr (Member # 410) on 08-30-2007, 09:10 AM:

Is the changeover box and remote box the same thing? Would there be a seperate schematic for the Changeover box.

Bernie

Posted by Steve Guttag (Member # 268) on 08-30-2007, 07:27 PM:

No, a remote is just as its name would imply...a remote control (wired) to control the varioius projector functions. It came with the projector.

The Changeover box was a stand alone piece made by Elmo that had a bit of a "home made" feel to it. I have never seen schematics on the C/O box myself though I have dealt with at least two of them. Mind you, the C/O boxes I've handled were for the CX series of projectors. I have no idea if they worked with the XP series.

Steve