Nvr supply Delta DPS-300AB-81B circuit

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  • alltvrepairs
    Badcaps Veteran
    • Jan 2014
    • 219
    • Malta
    #1

    Nvr supply Delta DPS-300AB-81B circuit

    Hi
    Am trying to repair this supply. Do we have a circuit pls?
    Goynd Mosfet blown. Replaced, check for other shorts 9rvopen bias resistors but blew again at switch on.

    Outputs: +12v , -53v.


    Regards
    Darren
    Tags: None
    • alltvrepairs
      Badcaps Veteran
      • Jan 2014
      • 219
      • Malta
      #2
      Re: Nvr supply Delta DPS-300AB-81B circuit

      The problem is in the PFC curcuit blowing Mosfet.
      Uses IC CM6800 pfc contrller. Supply pins +16v healthy.

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 8179
          • Canada
          #3
          Re: Nvr supply Delta DPS-300AB-81B circuit

          If the mosfet is shorted to the gate, chances are that the gate drive blew up too. So yes, that includes the pwm and anything between it and the gate of the mosfet.

            Comment

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