Film-Tech Forum ARCHIVE: Elmo cl16 xenon projector service manual

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Posted by Bruce McNaughton (Member # 2691) on 05-01-2016, 07:07 PM:

Does anyone have a service manual for the xenon 250W 16CL projector?

Posted by Randy Stankey (Member # 64) on 05-02-2016, 12:50 PM:

http://www.acofs.org.au/part_5_files/Elmo/Tech%2016%20CL.pdf

Posted by Mitchell Dvoskin (Member # 751) on 05-02-2016, 03:15 PM:

The link Randy provided is for the standard halogen Elmo CL. While the mechanics are virtually the same, the power supply and other electronics are different in the Xenon, and very different in the Xenon Deluxe.

Posted by Bruce McNaughton (Member # 2691) on 05-02-2016, 05:14 PM:

Yes the halogen model service manual does not give me any joy. I need to establish how the amplifier and xenon circuits interact.

Posted by Tony Bandiera Jr (Member # 2365) on 05-02-2016, 10:26 PM:

Don't have the manual, but if memory serves from when I dealt with one some years ago....

There is a relay that either cuts out the speaker/line output (or shorts out the line input to the amplifier) to effectively keep the "static" from the lamp ignitor from getting into the audio.

Perhaps I (or someone else) on here can be more helpful if you told us in as much detail as possible what the issue is that you are having with the projector...

Posted by Bruce McNaughton (Member # 2691) on 05-03-2016, 12:02 AM:

Sure... I threw out the amplifier which died in mid performance. I made and installed a pre amp which works like a dream but the xenon won't ignite so there is some loop or circuit that needs re-instating. Hopefully it is just simple as your memory suggests but I need to find and understand a circuit so that I can attend to the issue.

Posted by Tony Bandiera Jr (Member # 2365) on 05-03-2016, 10:41 AM:

Ahh, that makes sense..

So it should be simple to trace out..in that projector it appears there was a relay in the amplifier that cut off the ignitor whenever the amplifier was powered on...

If by chance you still have that amplifier (and have good electronic skills which you seem to have) the easiest way to do it is to trace out and identify the connections to the amplifier..eliminate the obvious first (incoming mains power, speaker out and incoming line level audio.) After marking all of those connections, you should have two left over. Those would be the connections to the ignitor.

To determine if they are a switch loop, simply measure resistance between those two connections. In this situation, with the amplifier powered off, it should read zero ohms.

If the amplifier actually supplied the power to the ignitor, then the two left over connections should both read continuity to the mains inputs you already identified on the amplifier. In this case, one lead should read as zero ohms between mains hot and the other to mains neutral.

Once you know whether it was a switch loop or mains feed, you can now, in the projector, jump the two ignitor leads together (if a switch loop) or tie the appropriate leads to the correct side of the mains.

Now if you literally tossed the amplifier in the bin, we're back to finding the manual. [Big Grin]

Posted by Bruce McNaughton (Member # 2691) on 05-03-2016, 05:31 PM:

Thanks Tony. I still have the amplifier and I do intend to do exactly as you suggest if I cannot locate a circuit. If it as simple as a switch loop ( I very much doubt that any power to the xenon goes through the amp,) I should be able to nail it. There is also the possibility that the relay is attached to the lamp electronics, not in the amp so I will be searching for a pair of thin interconnecting wires.

I'm sure that I will work this out but a circuit would save a lot of poking around...