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Thread: Lasos LGN 3001 laser power supply for confocal microscope

  1. #1
    Join Date
    Dec 2017
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    Default Lasos LGN 3001 laser power supply for confocal microscope

    Greetings,

    I my work I use often Carl Zeiss LSM 710 confocal microscope with green argon laser. Unfortunately, Lasos LGN 3001 power supply for this laser become unstable. In general, the laser works, but it can stop working suddenly. Operating time vary from 20 minutes to 2 hours. It means, that the problem can be in overheating or capacitors aging. The easies way to fix it is to find in the Internet a circuit diagram and to check it for weaknesses. But I didn't succeed in it.

    Is it possible to find a circuit diagram of such power supplier? Can experiences specialist in electronics repair it without a circuit diagram?

  2. #2
    Join Date
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    Default

    Do you know for certain that it's the power supply that's causing the problem?
    I've repaired a number of ion PSUs without schematics, but you'll fiund the cost of someone's time likely exceeds the price you can purchase a used one for. I believe the Lasos ion head is a drop-in replacement for the Omnichrome / Melles-Griot 532 or 543 (sure someone will confirm), in which case PSUs are plentiful.

  3. #3
    Join Date
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    Default

    I don't know for sure that the problem is in the power supply. I'm not an expert in the laser equipment (I'm PdD student in biophysics). If you can advise me how to check it, I'll be most grateful.

    When the laser stops operating, the red "interlock" lamp on the PSU goes out. Based on common knowledge I came to conclusion that it can be useful to check all the electrolytes in the PSU, because it is a weak point.

    As for the replacement of PSU, did you mean this one? It is quite cheap, but how to find out, does it really suit to my laser?

    https://www.ebay.com/itm/OMNICHROME-...sAAOSwWxNYp8Zj

  4. #4
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Default

    The Lasos used in most newer confocals is generally not the ALC 60 / Omni 532 compatible one, but the small footprint one. Lasos uses one connector and three different pinouts to line up with three other laser manufacturers.
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  5. #5
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    Dec 2017
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    It is still unclear for me that is the oprimal and cost effective solution to the issue( Firstly, I need help to determine whether the problem really in the PSU. And finally, is it rationally to repair it or to replace with compatible model? What is the best approach to repair such equipment? Any help will be much appreciated.

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