8mm Forum: Fail reception fim: Elmo GS 1200

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Posted by Miguel Roman (Member # 6208) on December 16, 2017, 09:04 AM:

Hello everyone: My Elmo Gs 1200, has stopped collecting the movie. He did it well until a few months ago, from time to time he stopped momentarily and with some small touch his work was restored.
I have disassembled and cleaned the engine, checked the gears, cleaned and greased.
The motor runs externally powered, in both directions; the engine is fine.
I do not know where to start; relays? Power circuit ...?
Can someone guide me?
The rest of the projector works correctly, this motor also does it in the rewind.
I hope some guidance.

Posted by Paul Browning (Member # 2715) on December 16, 2017, 09:19 AM:

Hi Miguel, check the gear at the base of the rewind arm, this is known to split and will jam the mechanism from rewinding the film, or take up, its a bit awkward to see this, get a bright torch to shine inside the gearbox with the back cover removed.

Posted by Miguel Roman (Member # 6208) on December 16, 2017, 01:27 PM:

Hello Paul, thank you for your prompt response. I already dismantled the engine and checked the gears, cleaned them and added grease ...
I have measured the voltage that reaches the motor and only arrives when it is switched to rewind, there is no voltage when I switch "forward"
I think it's from the circuit, it can be a switching relay ...
Thanks for your suggestions I hope that someone has had some similar experience or knows the possible cause of this anomaly.

Posted by Paul Browning (Member # 2715) on December 16, 2017, 02:01 PM:

Hi Miguel, you need the service manual for the GS, its comprehensive, with a step by step guide to fault finding, I will have a look for you, with the fault you have mentioned here.

Posted by Maurice Leakey (Member # 916) on December 16, 2017, 02:41 PM:

Film Tech have a free download for the Elmo GS-1200 Service Manual.
http://www.film-tech.com/warehouse/index.php?category=2#8mm Projectors

Posted by Miguel Roman (Member # 6208) on December 16, 2017, 02:54 PM:

Hi, Paul, I appreciate your interest and understanding.
I'm sure there are manuals of all kinds and solutions, too ...
but locate the problem, between the maelstrom of manuals ...
It is a task for experts and I am not.
I thank Marice for her indication, but I need something more specific and accurate, thank you

Posted by Paul Browning (Member # 2715) on December 16, 2017, 05:24 PM:

Hi Miguel, don't dismiss the service manual before you have at least downloaded it, because it has a two page diagnostic on this issue, for forward and backward motion of the motor function not working, if your able to read circuit diagram it may solve your problem....

Posted by Miguel Roman (Member # 6208) on December 16, 2017, 05:45 PM:

No, I do not rule out anything, I need some certainty, because I'm not an expert and I need to get directly to the problem, thinking maybe, in the experience of someone who has "suffered" before me.
I am very grateful for your recommendations.

Posted by Miguel Roman (Member # 6208) on December 17, 2017, 08:45 AM:

I have already downloaded the service manual of the GS 1200. Paul, can you tell me the number of the pages where the problem of the advance engine is described, and everything related to it?
Thanks again

Posted by Paul Browning (Member # 2715) on December 17, 2017, 09:15 AM:

Page 87 - 88 in the manual Miguel

Posted by Miguel Roman (Member # 6208) on December 17, 2017, 12:12 PM:

It exceeds my knowledge of electronics, and the necessary tools ... I only have a multimeter, and little else.
Thanks for everything

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