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EP-613 linear reg. power supply ,looking for service manual or schematics.

Discussion in 'Troubleshooting and Repair' started by dorke, May 28, 2018.

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  1. dorke

    dorke

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    Jun 20, 2015
    I recently got this linear triple power supply 0-30V/2.5A variable,12v/5v fixed.
    Need the service manual or schematic in order to repair and calibrate it.
    It is sort of a generic/label unit goes under various names Manson/Rapid/Velleman/OF.I etc.
    I searched the net ,couldn't find it.
    Does anyone have it?
    Thanks
     
  2. 73's de Edd

    73's de Edd

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    Aug 21, 2015
    SIr dorke . . . . .
    How about checking to see if that basic design is using tandem 3055 transistors as the pass transistors and is based upon a 723 chip as the regulator and its variable aspects..

    73's de Edd
     
  3. dorke

    dorke

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    Jun 20, 2015
    Yes,I can do that.
    I can also create a full diagram by tracing the devices and boards etc.
    but I rather have the diagram instead of all that work and time...:)
     
  4. 73's de Edd

    73's de Edd

    2,794
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    Aug 21, 2015
    That's why I asked of the design . . . I have seen both types.
    A unit using a giant transformer for a linear AC power supply OR a unit with switch mode technology and ferrite power transformers.
     
  5. dorke

    dorke

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    Jun 20, 2015
    It's Linear.
     
  6. FunnySmell

    FunnySmell

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    Jul 9, 2018
    Okay, had to renew my pw to reply dorke. I can't help you with a service manual and not sure that this price level one would exist in the wild so to speak. I have two of these under the brand Manson EP613; one is not working properly and after some repair work it works to an extent. The 2nd one was a backup and sat in a cupboard for many years. Now it is in service with a cheaper and better specc'd 10A job. If I was in your predicament I would contact this bloke: https://owenduffy.net/equipment/EP613/index.htm
    who seems to know his way around these units far better than me.
    Good luck!
     
  7. bertus

    bertus

    318
    104
    Nov 8, 2019
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