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Mitsubishi Diamond Pro 930SB Monitor, twitchy vertical deflection

Discussion in 'Electronic Repair' started by [email protected], Mar 7, 2006.

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  1. Guest

    Hi, I've got a Mitsubishi Diamond Pro 930SB 19" computer Monitor
    that's been working great for about 2 years, but has started getting a
    twitch or two in it's vertical deflection after 10 or 12 hours on.

    Flat lined once on me. Toggling power saving mode for a few seconds
    usually clears it up for the short term. I've stopped using it with a
    screen saver and have gone to the power saving mode when I'm not using
    it to give it a rest and cool down.

    Google confirmed a couple of other people have had the same problem
    but didn't yield the real issue or fix. Hell of a high performance
    monitor for ~$300, but I guess the parts were just a bit too cheap.

    Wondering if anyone is familiar with the problem.

    TIA
     
  2. JANA

    JANA Guest

    You would have to go through all the capacitors in the power supply and
    vertical deflection circuits with an ESR meter. More than likely you will
    find a number of capacitors that have become high in ESR with use. This was
    very common on many of these monitors.

    Since there are serious safety issues when working in monitors, if you are
    not properly trained and equipped to do monitor service work, you should
    give the monitor out to a service centre for an estimate.

    Considering the quality of the new LCD monitors that are in the same price
    range that you paid for your Mits monitor, it may be a better preference to
    upgrade to a descent LCD screen. There are many advantages of the LCD
    technology over the CRT technology.

    --

    JANA
    _____



    Hi, I've got a Mitsubishi Diamond Pro 930SB 19" computer Monitor
    that's been working great for about 2 years, but has started getting a
    twitch or two in it's vertical deflection after 10 or 12 hours on.

    Flat lined once on me. Toggling power saving mode for a few seconds
    usually clears it up for the short term. I've stopped using it with a
    screen saver and have gone to the power saving mode when I'm not using
    it to give it a rest and cool down.

    Google confirmed a couple of other people have had the same problem
    but didn't yield the real issue or fix. Hell of a high performance
    monitor for ~$300, but I guess the parts were just a bit too cheap.

    Wondering if anyone is familiar with the problem.

    TIA
     
  3. Guest

    bummer. I've been hearing about the low quality caps for a while now.
    That would explain why google posters mention they sent theirs off for
    warranty service and it didn't get repaired. Pity.

    Yeah I've got a LCD HDTV (a sweet 40 lbs or so), but I like being able
    to change resolution on CRT monitors, which is one rather large
    problem with LCD displays. Colors are nice too. Ideally I'd like a
    32-42" 1080P LCD with a strobed LED backlight and a CAD quality 20+"
    CRT combo for my desktop.

    Oh well I guess I'll invest in the shop manual and browse around
    inside with a hair dryer.

    Any recommendations on a place to buy good Caps ?
     
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