Looking for a short with a DC power supply question

Discussion in 'General Electronics Chat' started by p1muserfan, Dec 13, 2015.

  1. p1muserfan

    Thread Starter New Member

    Aug 13, 2014
    2
    0
    I've got a 30V,5A DC power supply that comes in handy for finding shorts on the motherboards I mess with. I usually set it to 1 volt and 2 amps. I understand that a no problem board will show 1 volt and 0 amps, and a shorted board will show 0 volts and 2 amps. But what is the issue when I get 1 volt AND say 1.6 amps?
     
  2. dl324

    Distinguished Member

    Mar 30, 2015
    3,244
    622
    Low resistance short, but not low enough to draw 2A.
     
  3. p1muserfan

    Thread Starter New Member

    Aug 13, 2014
    2
    0
    Could that be any component in a circuit that I'm looking at or is it maybe a symptom of a particular component?
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
    3,244
    622
    Yes.
     
  5. hp1729

    Well-Known Member

    Nov 23, 2015
    1,954
    219
    A filter cap in backwards? An IC in wrong?
    Look for something that gets hot. Do you have freeze spray available? Paint the board white with freeze spray, apply the power and see what thaws out quickly.
     
Loading...