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LCD display flaky

Discussion in 'Electronic Repair' started by David Harmon, Sep 1, 2007.

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  1. David Harmon

    David Harmon Guest

    I've got a handheld meter with a LCD display (Sunpro Tachometer) and
    some of the LCD segments are getting flaky. Assuming it's put together
    with a zebra strip, would I be better off trying to take it apart and
    clean it, or wait until it becomes intolerable first? In other words,
    what are the chances of making it better rather than worse?

  2. mark

    mark Guest

    You'll probably fix it if you wipe off the rubber strip.
  3. Lynn Coffelt

    Lynn Coffelt Guest

    If it was me, I'd strip it down and clean the strips, pcb and LCD element.
    Good, high test alcohol and a Q-tip. Vodka works ok if that is handier to
    the work bench, but wait until it drys for a few minutes before
    reassembling. (some water in Vodka).
    Of course there is a danger here of ruining the LCD element itself
    (been there, done that). But if you are half-way competent with hand tools,
    it shouldn't be a big problem.

    Old Chief Lynn
  4. N Cook

    N Cook Guest

    I clean off the zebra and the LCD lands with methylated spirit and remount
    with the zebra upside down. Unless the rubbery bits are perished/stuck to
    the lands then unlikely to make matters worse.
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