Repairing a Fluke 8810A Multimeter

Discussion in 'General Electronics Chat' started by Sparky49, Nov 27, 2012.

  1. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
    834
    417
    Hi guys.

    I managed to buy a Fluke 8810A for £1, knowing that it wasn't working. The selection switches were broken bar one, and they were also jammed. Also the meter didn't seem to measure properly.

    I thought that at worst, it had some 7 segment displays which I could salvage, as well as a transformers, etc...

    But I'd like to fix it. :)

    I managed to fix the jammed switch by pulling out a piece of metal which did nothing other than prevent the switches from ascending into place. I'm making up a couple of new switch levers at school, so those parts are sorted.

    However, I've tried calibrating, but it seems impossible. I've read the manual (http://www.ko4bb.com/Manuals/Fluke/Fluke_8810A_Digital_Multimeter_Instructrion_Manual.pdf), but I cannot get it to settle. The decimal point moves around, and the variable resistor which is used to calibrate does nothing. The variable resistor does work, I've checked it with a multimeter.

    YouTube video here with all the information.

    http://www.youtube.com/watch?v=VPNMMbsvs-Q&feature=youtu.be


    Thanks for your time,

    Sparky
     
  2. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    These older meters used to be built around a 7106 or 7107 chip which was known to blow easily (mine's on it's third).

    Also check for any blown fuse or fuse link on the PC board.
     
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