What is this part and where can I find one

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  • pflowers
    Member
    • Jan 2009
    • 36

    #1

    What is this part and where can I find one

    I am working on a bunch of Neoware thin Clients (EON 5000) and I have been told that a "regulator" may be a problem part.....when I removed the part from the power supply I found the markings 1MO365R stamped on the side of it......but I can not seem to find a site that tells me what this is.....any Ideas?

    Thanks,

    Paul
  • sofTest
    Badcaps Veteran
    • Aug 2008
    • 361

    #2
    Re: What is this part and where can I find one

    It looks like it might be this one.
    ------------
    Be a mensch

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    • pflowers
      Member
      • Jan 2009
      • 36

      #3
      Re: What is this part and where can I find one

      that def looks like my part thanks

      Comment

      • PCBONEZ
        Grumpy Old Fart
        • Aug 2005
        • 10661
        • USA

        #4
        Re: What is this part and where can I find one

        Same thing I found.
        Seems to be an obsolete PN.
        Here is the data sheet:


        I think this is the replacement but check the data sheets. [I didn't look too close.]
        Mann-Made Global Warming.
        - We should be more concerned about the Intellectual Climate.

        -
        Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

        - Dr Seuss
        -
        You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
        -

        Comment

        • pflowers
          Member
          • Jan 2009
          • 36

          #5
          Re: What is this part and where can I find one

          differences are
          stop threshold
          (1M0) 9 min 10 typ 11 max V
          (5Mo) 8.4 min 9 typ 9.6 max V

          Maximum Duty Cycle
          (1M0) 74 min 77 typ 80 max %
          (5M0) 72 min 77 typ 82 max %

          Over Voltage protection
          (1M0)23 min 25 typ 28 max V
          (5M0)25 min 27 typ 29 max V

          Start Up Current (this looks way off....but what do I know)
          (1M0) 0.1 min 0.3 typ 0.4 max mA
          (5M0) - min 100 typ 170 max uA

          PC you seem to be the GoTo guy these days.....everything else in the data sheets is identical....think the 5M0 is within range as a replacement?

          Paul

          Comment

          • PCBONEZ
            Grumpy Old Fart
            • Aug 2005
            • 10661
            • USA

            #6
            Re: What is this part and where can I find one

            I'm not the go-to guy for that one. I B not IC guru.

            I know caps and how to find hard to find parts but I haven't done much with transistors or IC's since the 80's.
            I did work on the stuff but alternate ICs weren't allowed AT ALL in my job.
            I'm RE-learning that stuff as things come up but that light bulb is still kind'a dim.
            IOW, I'm not far enough along to be making recommendations.

            That's why I said to check data sheets. - I meant for someone that knows more about transistors than me to check the data sheets.
            .
            Mann-Made Global Warming.
            - We should be more concerned about the Intellectual Climate.

            -
            Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

            - Dr Seuss
            -
            You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
            -

            Comment

            • pflowers
              Member
              • Jan 2009
              • 36

              #7
              Re: What is this part and where can I find one

              Well Fairchild was kind enough to ship me a sample of the KA5M0365R at no cost.....I'll plug it into one of the battered units and crank it up.....as a side note.....if you look up the 1M0 at fairchild it brings up the 5M0 but then I'm sure thats how you came up with that possible replacement....as it stands I have gone through 30 units and about 10 of them have a bad IC...the other 20 were just caps....even if I can only recover 66 of these 100 it still saves me 6600 bucks minus the cost of the caps.....not bad if I do say so myself.....

              that start up current is a bit of a worry with a 300 amp typical on the 1M0 and a 170 amp max on the 5M0

              Thanks for your input,
              Paul
              Last edited by pflowers; 02-28-2009, 06:26 PM.

              Comment

              • PCBONEZ
                Grumpy Old Fart
                • Aug 2005
                • 10661
                • USA

                #8
                Re: What is this part and where can I find one

                Be sure to post comments and let everyone know if the substitute works okay (or not).
                Might help someone else in the future.
                Mann-Made Global Warming.
                - We should be more concerned about the Intellectual Climate.

                -
                Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                - Dr Seuss
                -
                You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                -

                Comment

                • pflowers
                  Member
                  • Jan 2009
                  • 36

                  #9
                  Re: What is this part and where can I find one

                  OK the KA5M0365R is a good replacement for the KA1M0365R.....the 1 stat I was concerned with the start up current....is the current it IC uses at startup.....so its quite an improvement.....however....that was not the bad IC on this power supply....I put the Power Switch Fairchild sent me into a working unit though and its been running for 24 hours without problems......man this is a pain without the proper testing equipment.

                  Paul

                  Comment

                  • PCBONEZ
                    Grumpy Old Fart
                    • Aug 2005
                    • 10661
                    • USA

                    #10
                    Re: What is this part and where can I find one

                    Originally posted by pflowers
                    differences are
                    Start Up Current (this looks way off....but what do I know)
                    (1M0) 0.1 min 0.3 typ 0.4 max mA
                    (5M0) - min 100 typ 170 max uAl
                    I just read this again. I didn't catch it the 1st time through.
                    1M0 is in mA
                    5M0 is in uA

                    100 uA = 0.1 mA
                    So start-up current is actually less with 5M0, which is better.

                    .
                    Mann-Made Global Warming.
                    - We should be more concerned about the Intellectual Climate.

                    -
                    Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                    - Dr Seuss
                    -
                    You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                    -

                    Comment

                    • pflowers
                      Member
                      • Jan 2009
                      • 36

                      #11
                      Re: What is this part and where can I find one

                      yup I was worried the currents listed were the max that IC could handle....not its consumption.......I spoke with an EE friend of mine....(my boss ) and he corrected my thinking.......still at the end of my rope here though on these 11 units.....I've checked the + volt. reg the - volt. reg. and swapped out that power switch......still have no power to the main board.....guess I have to try testing a hot unit see if I can find out where it breaks down......gonna take awhile.....

                      I might ship one off to the place that was repairing them for us just to see what they replace.....it will cost me 100 bucks.......but in the long run still saves me about 900 (and counting)

                      Paul

                      Comment

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