Repair manual for DeJur 747 8 mm projector

There are a few things that could be causing this issue. First, make sure that the audio volume on the projector is turned up all the way. If it is and there is still no sound, then the next thing to check is whether the audio strips on your film are damaged or corrupted in some way. If they appear to be fine, then the issue may be with the projector's sound system itself. In this case, you may need to take the projector to a qualified repair person for further diagnosis and possible repairs.

If you can hear the motor running then it is most likely the belt that connects the motor to the takeup is broken or stretched out and not longer driving the reel. That is a pretty easy repair.
If you cannot hear the motor then the trouble is more serious and probably not worth repair.

Had this problem a long time ago - film on input reel was wound too tightly, and kept pulling. only fix I found was to wind film back and forth without going through the projector half a dozen times, then try again. Other possibility could be that the drive belt tension needs adjusting - how you do this depends on the projector If these do not help, then suspect something more serious and take it to a reputable repair facility, but it could be expensive. Might be cheaper to get the films digitised to DVD.

For a projector to run right, the motor has gear teeth in it that engage with the hollow points on the film itself. The motor has to turn at a steady speed with no friction or hesitation. It is possible the motor on the inside of the projector needs to be oiled or cleaned out...or rebuilt at worse.
There is also the motor that pulls the film thru the projector and winds it onto the receiving spool. Sometimes that motor is out of synch with the projector drive motor and trys to pull the film thru to fast or turns to slow and the you get that "clicking " sound when the receiving spool isn't winding the film up fast enough and the film gets dragged on by those projector teeth and make that plastic clicking sound.
Watch the film while it is running between the two reels and the projector lens. The film should be slightly taunt going into the projector and slightly taunt coming back out of the projector. If you see the film grouping up in front of the projector drive or after, then you know your spools are needing greased up or there is a drag on the motors causing things to be unsynchronized.

This is definitely a mechanical problem and you need to watch the film being fed into the projector and how it is wound up n the receiver spool to see where the fault lies.

I assume you haven't put a reel of film onto the projector and looped it through to the back spool. The front spool usually 'freewheels' whilst the film is pulled through the projector and taken up by the motor driven rear spool.
It is possible that the friction drive and/or drive belt have deteriorated with age, as the mentioned projector is a rather elderly 'classic' of the dual 8mm series.
If in doubt, don't risk your family pictures. Try the unit with an old piece of film on small spools.

I think the Eumg 610D was a dual guage projector, capable of showing both Standard 8 and Super 8 films. (I'm basing my comments on the S810D I have in front of me, its sound "big brother").

To move between formats, there were two cogs internally that had to be changed, a film gate (two parts), and two adaptors/liners inserted into the centre of the film reels that transformed the centre from "a fat one" to "a thin one".

If the take up driver cog is rotating, but the reel is not, check whether the adaptor is in place.

You can see what they look like on eBay....

http://cgi.ebay.com/NEW-Super-8-Movie-Projector-Reel-Adapter-Film-8mm_W0QQitemZ170450331975QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item27afa1a947

If the rear driver cog is not rotating, then it might be a worn/defective drive belt, in which case leave a further comment and we'll explore that.

Hope this helps

The Bell and Howell Model 456 Autoload was made that way ON PURPOSE. The last foot or so must be manually pulled from the projector. As described in the manual, "this safeguard has been designed to prevent the end of your film from flapping against the projector after your movie is completed."
If the entire film was going into the take up reel at the end automatically, then THAT was a defective occurence. It is not supposed to do that.

There are 3 round knobs and 1 Autostart switch on the control panel. The key to rewinding this machine is by pushing the gray button down, while turning the Motor Knob to the "Run" position. Of course you'll need to start the original film back on its reel, directly. (Do not thread the film as you would normally.) BTW, you can show your films in reverse by using the Reverse button on the motor switch while its running. Hope this helps. Now, if I can find someone who can guide me in re-assembling my Elmo projector's lens, which I dis-assembled in order to clean the crud off the multi-lenses in the main lens unit itiself.

http://www.craigcamera.com/lit_b.htm. This is the cheapest I could find for your actual owners manual. I hope it helps. Steve

Don't have the motor switch in the still position when loading -make sure it is on FORWARD. Look at the little holes in the film and make sure the film is on the same side as the little grooves on the drive gear.
PS -let the bulb cool off before try to move the projector ,the bulbs are very expensive and hard to find.
If you do use the still position to view a frame do it for just a few seconds or the bulb will burn the film. Good luck- Tom.