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Bad transformers in power supply

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    #1

    Bad transformers in power supply

    Obviously this is a question for the more experienced technicians here -

    I was wondering if you've ever found a transformer to be the cause failure in a power supply. If so, how can you can troubleshoot these and find a replacement?

    Thanks!
    Tags: None
    #2
    Re: Bad transformers in power supply

    5vsb transformers in Antec SmartPower power supplies have been reported to fail. I don't know the reason of failure and how you can easily test a transformer to see if it is bad...

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      #3
      Re: Bad transformers in power supply

      I think there are a few panasonic models that blow thirmal fuses.. Check you tube for them.

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        #4
        Re: Bad transformers in power supply

        You need ringer tester for finding out if it has shorted turn. What is the power supply not doing? Turn on and then shutdown? Blowing fuse or MOSFET? I have yet to replace the transformer in the power supply, but I did replace a lot of high voltage transformers.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

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          #5
          Re: Bad transformers in power supply

          I was just asking a general question. I've never bothered to check a transformer in a power supply for two reasons.

          1. I"ve never had a reason to suspect a faulty one
          2. I wouldn't know how

          I was just wondering how often they might fail, and what the more experienced guys here have seen

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            #6
            Re: Bad transformers in power supply

            In TVs, I haven't seen one bad in ANY flat panel type TV. I saw a few years ago in CRT sets. You will occasionally see a bad power transformer in audio systems, due to the high power requirements of high wattage receivers. Those failures can usually be found by continuity testing. Most often the primary winding opens up.

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              #7
              Re: Bad transformers in power supply

              Can anyone tell me how to post a new thread?

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