Need help to repair multimeter

Discussion in 'Technical Repair' started by vead, Sep 10, 2016.

  1. vead

    Thread Starter Active Member

    Nov 24, 2011
    621
    8
    Hello
    I need help to repair my digital multimeter. There is display error It does not show value
    IMG_20160910_181002.jpg
     
  2. AlbertHall

    Well-Known Member

    Jun 4, 2014
    1,964
    387
    Most likely the connections between the display and the circuit board are faulty. Generally these are unrepairable without special equipment.
     
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  3. vead

    Thread Starter Active Member

    Nov 24, 2011
    621
    8
    Hello AlbertHall
    That means I have to buy new multimeter
    Which type of special equipment are you talking?
     
  4. AlbertHall

    Well-Known Member

    Jun 4, 2014
    1,964
    387
    There are generally two methods used to make the connections to the glass of the LCD.
    1. A rubber strip divided into very small conducting and insulating sections squashed between the LCD and the board.
    2. A clear (usually) flexible PCB strip which is attached by conductive glue to the LCD and the board.
    I don't know details of how these are produced/attached but I have tried to repair such with no success (40 years servicing electronic things).
     
  5. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    In the U.S. there is a store that gives away meters like that for free, called Harbor Freight.

    That doesn't help you, but my point is that such a meter is very inexpensive. The battery inside is worth more than the meter. I would not invest time in fixing it, but instead spend time finding another one.
     
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  6. RichardO

    Well-Known Member

    May 4, 2013
    1,238
    385
    Even though it can't be repaired it still has value!

    Open it up and look at how it is built. You can learn a lot that way.
     
  7. SLK001

    Well-Known Member

    Nov 29, 2011
    821
    229
    It looks like the connections between the LCD and the PCB are just fine. You probably have a bad main chip. This is not economically repairable.

    Buy a new meter.
     
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