8mm Forum: GS 1200 problem!

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Topic: GS 1200 problem!

Brian Hendel
Jedi Master Film Handler

Posts: 902
From: New York, New York
Registered: Jun 2003

posted February 11, 2006 05:26 PM

This may be one for Kev... but I am having an annoying problem with my GS1200. The auto thread lever where the film first passes will not release out of the lock position when the film hits the take up reel. You can hear it click but it remains locked. I have to jiggle it for up to five minutes sometimes to make it release. I can thread films without pushing the lever all the way down but that's annoying too... any advice? Thanks!

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted February 11, 2006 05:55 PM

Hello Brian. Its probably down to the microswitch behind the mechanism which is activated when the autothread lever is pressed down and latched. If the microswitch gets internal dirty contacts the lever tends to stay down when the autothread is released.
It would probably be a good idea for you to download the GS service manual from the manuals section on the left hand side menu on this window.

Look on page 15 at item 16 in Fig 4.

This is a fairly std microswitch obtainable from most electronic stores.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted February 11, 2006 10:14 PM

Brian,
I had exactly the same problem on one of my GS1200'S. Kev advised me to replace the micro-switch at the front of the machine, which I did, and I've had no problem since.

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted February 12, 2006 10:11 AM

Yes this, unfortunately, is a fairly common problem on the GS. I think its caused by the fact that there is quite a bit of grease etc in that area.
I have managed to cure the problem in the past without having to replace the microswitch but instead to leave it soaking in isoprop for a while which seems to degrease it or should I say clean it's internals.
I still think that its better to replace it for a lasting cure.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted February 13, 2006 10:20 PM

Hi Brian I am new to 8mm forum I noticed your problem with the
GS, there is a simple fix,I carried out on mine a few years ago
that is to tie a electrical tie rap around the solenoid end to end which holds the mechanical part of the release in and another
tie around the solenoid holding it together, this of course makes the projector into manual threading and providing you keep the threading button pressed until the film has passed the bottom sprocket it works fine,just make sure your tie raps are secure and doesn't foul anything it should be ok,I have been pleasantly surprised how much easier it is to thread compared with the carry on I have been putting up with for years. best of luck Graham

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted February 14, 2006 03:35 AM

Welcome to the forum, Graham. Can I ask why you didnt just get it sorted so that it worked properly.

I would have thought that changing the Microswtich is just as easy as going to all that trouble with the Cable Ties. I would also think that there is the possible danger of burning out the solenoid.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted February 16, 2006 02:26 AM

Hi Kev when I put the cable ties around the release solonoid I was finishing off fixing my rewind motor which had come to a juddering holt the night before,so it was a quick fix which turned out to be better than I thought,you can't burn out the solonoid as it only receives power when the microswitch is activated,and as the mechanical release is already held in by the cable tie there is no problem with this.Replacing the miroswitch if I could get one and if that was the reason for the problem then I would have probably have changed it.Graham

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted February 16, 2006 04:18 AM

Sounds reasonable to me Graham. I too find that its quite easy to get to that microswitch once the rewind motor is out of the machine as It's only the four screws holding it in place.
Those microswitches are std ones which are fairly easy to get hold of but they must have the small metal lever.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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