Problem with smps ASTEC LPT 43

Discussion in 'The Projects Forum' started by zisakis, Apr 6, 2011.

  1. zisakis

    Thread Starter New Member

    Mar 29, 2010
    1
    0
    Hello to everyone
    First of all sorry for my bad english.I have many smps by astec and the model is LPT43(IN=220V AC,OUT=5VDC/12VDC) ,and the problem appears when the main switch goes on and off too many times,or if the main power goes off line by a lightning,or by voltage abnormalities.Then the smps goes off and i don't have 5Vdc or 12Vdc.I open all of them and i did not found a burned fuse or short circuit.I have tested the electrolytic capacitors with oscilloscope and with a digital capacitor meter and the capacitors look's ok!
    any kind of help please?
    thank you everyone in advance
     
  2. debe

    Well-Known Member

    Sep 21, 2010
    946
    184
    SMPS dont like being turned ON/OFF rapidly, something is going to short or go O/C. If you want help a clear picture of the powersupply would help as we have no idea what we are dealing with!
     
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