Any possible help with fixes for my Eiki EX-9120 Pedestal Projector

[Ken Souza]

Hello All

Thanks for reading and any help/suggestion you may have to help me getting my Eiki EX-9120 pedestal projector up and running. I recently acquired this great projector. It was taken out out a local museum and when it was removed the movers had cut the wires that connect the base to the top half of the (lamp housing). Since I have received it a friend who is an electrical engineer has done and excellent jobs redoing the wiring. But, we have 3 things that we just can't figure out what the fixes should be. UGH. I thought I would see if anyone here has experience with these projectors and fixes.

I have been in contact with Richard Burges several times and he has helped me out a lot. But, we are both stuck at this point

Ok, here goes on the 9120. The projector was given to me.

The lamp lights (yay), motors run, most everything works. Except for the following and we can't figure these out. I have the service manual, and my friend is a pro at reading schematics, we are stuck. Here is what I/we need help with if you should have any suggestions or know what to do.

Douser: It has push button controls. The douser button lights up but does not release the Douser. So, I don’t get any sound since it will not release. I was told I could release the douser by hand. I have done that and still have no sound. We think it’s because the main control buttons/system does not recognize the douser is open because I opened it manually? Possibly a bad capacitor?

Rewind Motor/Feed Arm: We show that the feed arm and rewind motor appear to be getting power. When I press the rewind button it lights up, so we know that it is getting power, but the rewind motor does not engage. Possibly a bad capacitor here too? Or we could have some wires crossed when we repaired the wiring? According to the skilmatics it seems we have the wiring correct.

Geneva Maltese Cross Sprocket Movement: This machine has the Geneva Maltese Cross Sprocket Movement for the sprocket right below the film gate so it pulls film down because there are no claw in the film gate. It is an intermittent sprocket drive. Suppose the be the best and easy on the film.

When I run film the # 1 sprocket closest to the feed arm seems to be running at 24 frames. But the intermittent sprocket (under the gate) appears to be running slower and not pulling film down at the proper speed because I end up having film run all over the top of the projector because the sprocket is not pulling it down fast enough. A friend of mine has the same projector and thinks it’s out of timing or the Maltese Cross Sprocket could be damage or some teeth on the Maltese Cross sprocket might have broken causing it not to run at the right speed.

That is about it for now. Please let me know if you know anything that could assist me to getting it up and running. I am in San Francisco, if anyone should know of anyone here in the SF Bay Area that works on these machines that would be handy to know. I know it's a work in progress. If you care to email me directly you may at sffilm@aol.com

Thanks again and thanks for any information.
Ken

[Steve Lee]

Hi Ken.
For what I can remember they run with timing belts. Can you put a picture on here showing the back of the mech. It don't make sense that the cross box is running at a different speed. when all of the sprockets are driven together.

Steve

[Ken Souza]

Here’s a couple pics of the drive belts. There are only 2 and they are new. Let me what you think

[Steve Lee]

Hi Ken.
I think I have found the solution to the cross box. On the front of the mech just above the intermittent there should be a grub screw of some kind. This changes the speed of the cross box from 18 fps to 24 fps by moving the drive shaft in and out.
I must say that I had no idea that these machines could run at 18fps. It is only possible to do by moving various parts independently, not just one switch.




The dousers is a bit more of a problem. I depends on the exact model as there was about ten variants on this model. There is one with a row of dip switches on the control panel, another with a auto change over system , auto shutdown etc.
It could be that it has been used as one of a pair on changeovers. This would require a link in one of the circuits replaced or remove to allow it to be a stand alone machine, as it thinks it has another projector attached. As both of the dousers would need to fire simaltineously, one up and the other down.
There is likely to be a safety switch somewhere that will stop it being fired if the projector is not up to speed. If you can put some more pics on here of the front of the mech and the control panel so it is possible to work out the exact variant it would be helpful.

For the rewind there is also different versions. Some have a clutch mech that disengages the motor when it running a film.

Steve