SMPS question

Discussion in 'General Electronics Chat' started by 1-3-2-4, May 25, 2013.

  1. 1-3-2-4

    Thread Starter Active Member

    Dec 26, 2008
    194
    1
    First I should ask can they be tested in circuit? 2nd is between all the pins for the secondary side should I be seeing 0 Ohm?
     
  2. LDC3

    Active Member

    Apr 27, 2013
    920
    160
    You probably are reading through the protection diodes. Try reversing the leads on the DMV.
     
  3. 1-3-2-4

    Thread Starter Active Member

    Dec 26, 2008
    194
    1
    Still seeing 0 Ohm
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,999
    745
    You will be reading the transformer windings. You can't test things properly in circuit.
     
    1-3-2-4 likes this.
  5. alim

    Senior Member

    Dec 27, 2005
    113
    1
    Hi what exactly are you checking for, continuity? the secondary could be more than one separate winding, so you would find continuity in each coil and open between coils. Though the coils may have continuity they could still be bad that is they may be shorted you will have to use a RING TESTER to determine if that is so.
     
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