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LCD Number on Signal Generator has a line out

Discussion in 'Misc Electronics' started by W. eWatson, Aug 19, 2010.

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  1. W. eWatson

    W. eWatson Guest

    Back if this post works. I'm having trouble posting.
  2. W. eWatson

    W. eWatson Guest

    OK, I have a BK Precision signal gen, model 4011. I've had it for about
    5 or more years, and barely used it. I do mean barely. The power cord is
    still wrapped up as it originally was. I tried it on my Oscope, and it
    is working. In fact, a year ago I took it to an amateur who was capable
    of evaluating it with Oscope. It worked fine. I've done zip with it since.

    When I turned it on to run it into the Oscope, I found that a digit is
    failing. There are four digits, maybe some small version for a decimal
    point. When the leftmost digit is a 3, for example, the middle line is
    out. It looks like a backwards cap C.

    I plan to sell this, and is there any simple repair I can make? Maybe I
    just need to leave it on for a few hours. I was about to sell a Plymouth
    van last year, since we had no need for it. It had been sitting for
    almost a year with just a few drives here and there. When I checked it
    out before sale, it had some issues, minor, but annoying. As I began to
    use it more, it got better. I still have it and drive it once a week,
    and use it for bi-monthly 500 mile excursions to San Francisco/San Jose.
    Might work with the gen. Comments?
  3. Grant

    Grant Guest

    Depends whether the contacts are corroded or vibrated off, or LCD just
    needs a wiggle in the socket. Open up the thing to see how the LCD
    glass is connected. Give it a wiggle, unplug/replug.

    If it's in a housing pressure mounted against a PCB you may need to
    disassemble, clean contact area on PCB, reassemble. If it's been wet,
    you have corrosion to deal with, depends what you find inside the thing.

  4. W. eWatson

    W. eWatson Guest

    Thanks. Sounds like a plan.
  5. W. eWatson

    W. eWatson Guest

    I opened the device and poked around with a eraser on a pencil to no
    effect on the 5-digit display panel and wires leading to the display.
    There is zero aging and dust inside. It's been in a cardboard box for
    quite a long time. I did leave it all on for about 8 hours but that
    didn't change anything.

    I called the mfger for a part no. They had none, but did have two in
    stock simply called the display unit. The device is 7 years old and not
    mfgered any longer, although there is a 4011B. $25 for the part. I
    planned to sell this. I'm not sure the sales price warrants the
    expenditure or my effort to fix it.
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