8mm Forum: Eumig S931 problems

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Posted by David Storm (Member # 509) on December 07, 2005, 11:28 AM:

Hello everyone. I have bought an Eumig S931 but it doesn't work very well.

My first problem is that there are no voltage settings switch on this
projector, we have 230V in Sweden but the projector is made for 220V.
Is it safe to use it anyway or will the lamp be damaged?

When I set the main switch to threading mode it is VERY noisy, after a few
seconds a high pitch sound starts and only get worse.

It's not possible to thread the film, I have tried every way I can imagine
but can't get the film through the gate. There is a lot of red/brown dust
in the projector but I doubt it is the only thing causing these problems.

Does anyone have the 930-series repair manual? I don't know much about
projectors so every advice is welcome.

Posted by Kevin Faulkner (Member # 6) on December 07, 2005, 05:24 PM:

This will take the lamp up to about 12.5V which will probably be ok. Most Projector manufacturers tended to slightly underun the lamps so I would think the voltage would be a tad over the 12V. The brown dust you talk of is probably magnetic oxide from the sound stripe. Obviously that will need to be cleaned off.
As for the noises and lack of threading I think I will leave that to the Eumig specialists here on the forum as I dont know the 900 series at all.

Kev.

Posted by Paul Adsett (Member # 25) on December 07, 2005, 06:39 PM:

David, it is impossible to diagnose the problem from your description. You will have to carry out some simple tests to help narrow down the possible causes, but before you do anything, remove the side cover and give the whole film path a meticulous cleaning using cotton swabs and furniture polish. Do not put furniture polish on the stainless steel sound capstan or rubber pressure roller, but clean these parts with cotton swab and alcohol. Get everything meticulously clean and shiny.

Then, remove the side cover from the projector so you can see what's going on. Now, try threading up the film. I assume you know that this projector is for super 8 film , not the old regular 8mm.
Trim the end of the film using the film trimer on the projector.
Now turn the rotary knob to the threading position (clocwise 2 o' clock) and insert the film into the top sprocket feed slot red)
Now watch the film and find out where it is jamming up, is it above the gate or below the gate?
As for the high speed whine, this must be due to something scraping inside the projector. Is the shutter bent and scraping the chassis or housing? Look around inside the machine, take the back cover off as well, and use your eyes and ears to try to find out where the noise originates. Then let us know your findings and we can probably point you in the right direction.

Posted by David Storm (Member # 509) on December 09, 2005, 07:47 AM:

Thanks for your answers. It took four hours to get the film path really clean,
it was worse than I thought. My furniture polish was older than the projector
but it worked very well.

The film moves through the projector now but the takeup reel rotates just a
little sometimes, most of the time it doesn't move at all. Rewinding was not
possible either. The noise can now only be heard when trying to rewind.

I can't see any obvious problems with the mechanics but I will take a closer
look later.

Posted by Paul Adsett (Member # 25) on December 09, 2005, 02:31 PM:

David, the take-up tension is adjustable on the S931. Remove the back cover by taking out the four (4) screws. Look at the take up gear assembly (top right , looking in from the back side) and you will see a coil spring and a black nut. Try moving the nut clockwise to increase the compression on the spring, and thus increase the take-up tension. While your at it, put some grease on all the gears and a tiny drop of oil on the gear shafts. Do the same thing on the top left gear assembly, but do not adjust the tension on this coil spring unless the rewind is too tight or too loose. You may have to play around a little to get the take up and rewind tensions just right, but if you do this and clean and lube the gears with grease, and the gear shafts with a tiny drop of oil, I bet the machine will run like a swiss watch.

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