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Mits WD-52725 timer lamp blinks continually

Discussion in 'Electronic Repair' started by Guest, Oct 28, 2007.

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  1. Guest

    Guest Guest

    Hi. Mits WD-52725 dlp set. Timer lamp blinks green continually, reseting for
    a moment, when a relay clicks on PS, then usually resumes blinking, but not
    always. It can settle down and then I can start it up for a short time. Have
    checked PS outputs at test points with scope. All clean and flat. No puffy
    caps or any other obvious bad parts. Some voltages only come up when set is
    in the mood to run. 6V point runs at 7.2, which I expect as it is straight
    from diodes and caps, not regulated at that point. Otherwise all good if a
    volt or so high. Pulled DM board and changed the 4 1000 uf caps on general
    principles. Same results. Did same on Format board. Same results. Saw
    nothing unusual on DM , FMT, Terminal or tuner boards. Just for fun,
    unhooked power from Terminal board and tried. Except for blue screen from
    lack of a signal, same result.

    Another note here on this set. Before it quits, the control panel buttons
    and remote pickup loses control, nothing responds. Shuts down soon
    afterwards, and resumes timer light blinking. Voltage going to control panel
    is right about 3 volts. I have more digging to do before trying to estimate
    the repair, as I don't want to just throw money at the problem, hoping to
    solve it.

    Have heard something about reinitializing the eprom, but no details.

    There is lots of info on the WS series sets about this, but little on the WD
    sets.

    Thanks, Danny
     
  2. Guest

    Guest Guest

    Replaced DM board. Seems to be resolved.
     
  3. Did you try changing the caps that usually swell up and start with high DA
    before changing the board?

    Leonard
     
  4. Will Zenter

    Will Zenter Guest

    I have the same problem with my WD-52725, but I haven't been able to
    figure out how to remove the DM board. If you could point me in the
    right direction I would be very grateful.

    I've removed the back cover and the rear plate, and I removed the
    screws holding the chassis in place so I can slide the chassis back.

    What's the next step?
     
  5. These are tedious to take apart, but not particularly challenging. If you
    can't figure it out you probably need to not be messing with it. It is easy
    to damage wires or ribbon cables.

    Leonard
     
  6. Will Zenter

    Will Zenter Guest

    Would you please give me instructions or a hint as to what to do next?
    Not seeing what to do (perhaps having a blind spot) is not the same as
    being careless enough to damage something.
     
  7. Guest

    Guest Guest

    Fixed this one with new DM board.

    Thanks for the assist
     
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