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Thread: TV Repairman

  1. #1
    ph2ocraft's Avatar
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    TV Repairman

    Anybody here know TV repair??
    I have a 72" Mitsubishi Projector unit WS-73909 which has lost the ability to converge the lamps so I get that 3-D affect.
    Any suggestions or sites anybody could recommend??


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    Anybody here know TV repair??
    I have a 72" Mitsubishi Projector unit WS-73909 which has lost the ability to converge the lamps so I get that 3-D affect.
    Any suggestions or sites anybody could recommend??
    How old is this TV?

    Has the TV been moved or bumped, to cause the convergence to change?

    Do you do your own CRT convergence and focus adjusting on this TV?

  3. #3
    ph2ocraft's Avatar
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    Quote Originally Posted by K447 View Post
    How old is this TV?

    Has the TV been moved or bumped, to cause the convergence to change?

    Do you do your own CRT convergence and focus adjusting on this TV?
    It's 5 years old to the month.
    I had just moved the TV out in order to install a component for Kelly's WII (Christmas Gift) and blooop there it goes.
    I've not done a thing to the TV other than cleaning the lenses and vacuuming the dust on a quarterly basis.

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    rlharrison60's Avatar
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    Might be cheaper to buy a new one. They always seem to go down in price after a few years.

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    ph2ocraft's Avatar
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    I don't think I want to spend another 5K on a TV when I can just repair it for probably a few hundred bucks.
    My guess is it's a simple fix.

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    YudLuz2's Avatar
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    I just fix the same problem on my Panasonic 51 in. It seems
    that the two convergence modulars like too fail on these type
    tv's. I did a search on http://www.fixya.com/f/tags/b47/tube/page-2
    to find my issue. It seems like a number on Tv's use this same
    type of part. I bought both of mine off Ebay for $15 shipped to
    my door. It's possible to have some other issues, but this is the most
    common. The bad thing is the chips have 18 pins that are solder to the
    motherboard. So you need some experience in that area and then
    resoldering the pins back in place on the new chips. I got lucky
    on mine.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    It's 5 years old to the month.
    I had just moved the TV out in order to install a component for Kelly's WII (Christmas Gift) and blooop there it goes.
    I've not done a thing to the TV other than cleaning the lenses and vacuuming the dust on a quarterly basis.
    Well, I can tell you that a replacement DLP RPTV is way less than $5K these days.

    I have a Samsung 72" 72A650 that cost me $2500CAD, in Canada. I think you will find the same set for circa $2K in the US. Surprisingly, I found the best deal was through Costco, which extends the warranty, and had a low price.

    The only hassle was bringing it home, since the TV, let alone the box it comes in, is taller than any mini-van. It barely fit inside a full size cargo van (not a cube van), and that was with the box top removed. But they are not very heavy, and the frame is fairly stiff (on this size screen), so moving it around isn't that hard.

    The Mitsubishi 73" DLP models seem to also produce a nice picture, but the consensus seems to be that the Mitsubishi models have more reliability issues, and less service support.

    In the over 70" inch screen sizes, LED lamps are not yet bright enough, so these models all use high pressure mercury vapor lamps. I decided that the cost of a couple of lamp replacements over the lifetime of the set was a fine trade off for the screen size, brightness, and clarity. A plasma or LCD flat panel in these sizes is the price of a car.

    Regarding your current failure, You might start with opening up the service panel, and reconnecting every connector inside.

    Just be sure it is unplugged from the wall outlet for a while before you start messing around in there, as the three CRT high voltage drives have lethal voltages inside.

    Since the problem happened when you shifted the TV, you may get lucky and find a loose connection that just needs wiggling or re-seating.

    Beyond that, I am not familiar with the details of how the self convergence system is serviced. I stopped doing my own repairs on CRT televisions and computer displays a long time ago. I only have one CRT television left in the house (a 200lb 34" Sony widescreen), and every CRT computer display is long gone.

    Edit: There does seem to be lots of info on fixing these things. Whether it applies in your case, I couldn't say.


    There are very few 70+ inch RPTV manufacturers left in the market, with Samsung being the biggest by volume. Sony, Toshiba, Hitachi, and others have stopped making them. The bulk of the market volume is now in 'smaller' screen sizes, and flat panel LCD and plasma only.

  8. #8
    rlharrison60's Avatar
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    72 inches, Thats 6 feet, Yes, I would try to fix it first. Ok too many beers tonight.

  9. #9
    ph2ocraft's Avatar
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    Quote Originally Posted by YudLuz2 View Post
    I just fix the same problem on my Panasonic 51 in. It seems
    that the two convergence modulars like too fail on these type
    tv's. I did a search on http://www.fixya.com/f/tags/b47/tube/page-2
    to find my issue. It seems like a number on Tv's use this same
    type of part. I bought both of mine off Ebay for $15 shipped to
    my door. It's possible to have some other issues, but this is the most
    common. The bad thing is the chips have 18 pins that are solder to the
    motherboard. So you need some experience in that area and then
    resoldering the pins back in place on the new chips. I got lucky
    on mine.
    I've been to a few TV/electronics forums and the consensus does seem to be the IC chips and/or fuse imbedded into the center board.
    The IC's on the Mitsubishi appear to be 15pin, I think I'm up for the challenge. We'll see if my luck is as good as yours.

  10. #10
    ph2ocraft's Avatar
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