Announcement

Collapse
No announcement yet.

FLUKE 43B PM8907 power supply repair

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    FLUKE 43B PM8907 power supply repair

    Have two dead out of four power supply for (4) FLUKE 43B.
    The resistance reading on the two power prongs shows open circuit.
    Open up the module, you will need security bit, and found hair line crack on the circuit board. Too bad that FLUKE did not spec in fiberglass PCB to build this power supply.
    Fixed the broken traces and added epoxy to the PCB to help supporting the board.
    Attached Files
    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
    Tags: None
    #2
    Re: FLUKE 43B PM8907 power supply repair

    Good eye, bud.

    Comment

      #3
      Re: FLUKE 43B PM8907 power supply repair

      Hope you swapped out that "Stone" brand cap. They have all the longevity of a croissant at a feminist buffet.
      "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

      -Leonid Brezhnev (On the Yom Kippur War)

      Comment

        #4
        Re: FLUKE 43B PM8907 power supply repair

        Power supply is made in Germany with lousy cap. The replacement power supply is around $100.
        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

        Comment

          #5
          Re: FLUKE 43B PM8907 power supply repair

          Very disappointing for Fluke. Then again, after seeing CapXon in a Tektronix signal generator, I'm not too surprised.

          My Rigol scope uses Epcos caps, even though it is made and designed in China, they are OK caps. Not the best, but far from the worst...
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

            #6
            Re: FLUKE 43B PM8907 power supply repair

            Epcos is not a reliable brand. I've seen Dave Jones claim they are, but he's wrong.
            "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

            -Leonid Brezhnev (On the Yom Kippur War)

            Comment

              #7
              Re: FLUKE 43B PM8907 power supply repair

              Originally posted by mockingbird View Post
              Epcos is not a reliable brand. I've seen Dave Jones claim they are, but he's wrong.
              EPCOS are one of the largest manufacturers of capacitors primarily used in industrial and hi rel applications where the Japanese brands don't fill the market and they also cost a little less. For example they're a lot better at higher temperatures - the water electrolyte in the Japanese caps can boil off at high temperatures, reducing reliability.

              I have reasonable confidence in them. I doubt they're as good as a Rubycon or Panasonic, but I wouldn't call them unreliable. I've never seen one go bad.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

                #8
                Re: FLUKE 43B PM8907 power supply repair

                Originally posted by mockingbird View Post
                Epcos is not a reliable brand. I've seen Dave Jones claim they are, but he's wrong.
                Like tom, I've never even heard of them going bad? Have you?!
                Muh-soggy-knee

                Comment

                  #9
                  Re: FLUKE 43B PM8907 power supply repair

                  Thanks for sharing. I'm surprised they are made in Germany and not China.
                  --- begin sig file ---

                  If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                  We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                  Please do not post inline and offsite as they slow down the loading of pages.

                  --- end sig file ---

                  Comment

                  Previous template Next
                  Working...
                  X