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Slide projector problem

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Khandro | 11:52 Fri 19th Feb 2010 | How it Works
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I have a circa 1950's German, Noris Trumpf halogen 5x5 +6x6 cm. slide projector, which I use a lot for my work. It has suddenly started to turn off the light for a few seconds and then come back on again only to keep repeating this. I have replaced the bulb and tried to check connections to no avail. Anobody any thoughts on this please?

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has it got a thermal trip on it ?could be dust blocking any ventilation causing it to trip/reset/trip/reset etc.
12:36 Fri 19th Feb 2010
Is it still under warranty?
has it got a thermal trip on it ?could be dust blocking any ventilation causing it to trip/reset/trip/reset etc.
Question Author
Thanks for interest but I've just found the problem. I took apart the 'Non dismantleable' 2 stage power switch and found deposits on one of the contacts. Cleaned, it now seems to be working fine again. As I said, it was made in the 1950's, -good german engineering, but even the Germans don't give 1/2 century guarantees. Thanks.
Didn't make halogen lamps in the 50's either! But good on you. Keep on using it!
Question Author
Good point MJWMAN, well whenever they started making 'em I guess its dates from around then. The printed matter with it has a distinctly 50's look. Cheers!

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