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  1. #1
    Mustafa Umut Sarac's Avatar
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    53 years old DC Motor and electronic card repair

    I bought an Leicina 8s from 1960 to single frame use. I am expecting the worst and dc motor and electronic card is not working. Is it possible to rewire the coil - if there is any - and replacing the brushes with todays materials. If there is magnet inside , is it possible to resurrect it with electric.

    And what about electronic card ? Is there any ic use at that era , do parts are available ?

    Umut

  2. #2
    AgX
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    I would guess that rewinding a coil (with all the preperation necessary) is a hassle in no relation to obtaining another sample of that camera.

    But more general:
    Obtaining a more recent Super-8 camera with single frame release locally with the means to test it basically on place (they typically take AA-batteries) should be the better way to obtain single photographs.
    You would get more choices of cameras and probably more variety on films.

  3. #3
    Mustafa Umut Sarac's Avatar
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    My neighbor is working in recoiling industry. He can do this but I need to know what are the variables ? I dont think he is knowlagable about micro motors but I bought that camera extreme cheap and I dont use anything but Leica. I am fond of Leicina lenses for 3 years and I watched comparisons of these japanese cameras and they are more than horrible. I think they hire japanese fisherman for 3 months contract and they design the camera and lens.

    What about electronic card ?

  4. #4
    AgX
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    That should be reasonable simple. Open the camera to get access to the wiring and have some electronics specialist find out the source of the trouble.
    Are you sure the problem is not originating in the battery compartment?
    From experience with cine-cameras of the same age I can say that even a switch could be the source. Actuate all switches several times before considering a more serious failure. Just this week I had such a case. It did not work at all. Some actuating of the speed selector made it work at some attempts, then regularly.
    Last edited by AgX; 08-18-2013 at 11:10 AM. Click to view previous post history.

  5. #5
    Bill Burk's Avatar
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    Umut,

    You can easily rule out a motor issue by measuring voltage as you turn the motor by hand - it should become a small generator. Your neighbor would tell you in a second.

    If your problem is not in coils, you will be better off.

    Without knowing facts, I will just guess that circuit boards from that era were a lot simpler. They still make most electronic parts.

  6. #6
    Mustafa Umut Sarac's Avatar
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    Thank you AgX and Bill,

    There is least 4 weeks to camera reach me. It was so cheap , I am expecting an malfunction but may be I am wrong , I wish I was. My neighbor is at holiday and there is one week to return. Your tips are priceless , please forgive my ignorance but is there a digital processor in these cameras ? IC or something like that to be needed to programmed ? Or everything is analog ? What about the transistors , are they galium or modern silicon ?

    Thank you very much for your time,
    Umut

  7. #7
    AgX
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    There was not even an IC back then. And transistors had only been introduced in consumer products a few years before.

  8. #8
    Mustafa Umut Sarac's Avatar
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    AgX , If there are transistors broken on the card , is it possible to replace with modern ones ?

    Umut

  9. #9
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    DC motor- most likely corrosion on the armature (copper). Brushes (carbon) may be worn if the motor had high use. A motor of that era that failed got tossed. Most if not all were sealed and not intended to be repaired although they can be repaired with skill and patience.

    The electrical components on the card can be replaced depending on how good of an electronics parts supply you have. Some transistors will be hard to replace as they may have become obsolete. The electrolytic capacitors are the most likely failed component. You can identify them by their polarity markings on their side.

  10. #10
    Mustafa Umut Sarac's Avatar
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    shutterfinger ,

    Is it possible to find replacement modern dc motor for that camera ? Who can repair such a motor and replace transistors ? Do Leica still stocks such transistors and capacitors and the motor or where to look ?

    Thank you ,

    Umut

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