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Mitsubishi TV problem

Discussion in 'Electronic Repair' started by [email protected], Dec 22, 2006.

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  1. Guest

    My parents have an old(1996} Mitsubishi console tv. Recently the
    picture went out except for a thin white line running horizontally
    through the center of the tube. The rest of the picture was black. The
    tv still had sound. A repairman came out twice to try and fix it but
    still has the problem. My parents like the tv because of the wood
    console. I want them to buy a new one, but they are old fashioned. They
    don't like the look of modern tvs. What could be the problem with it, a
    bad tube maybe? Perhaps some loose wires?
     
  2. Jim Land

    Jim Land Guest

    Try a different repairman?
     
  3. Guest

    vertical scan failure
    keep guessing.


    NT
     
  4. Not an uncommon scenario. Lots of techs assume that a vertical failure is
    just that, something in the output stage. This is especially true when you
    find the leaky caps and perhaps a blown output IC that these sets usually
    have. The problem is that there is more wrong with the set, likely the 12v
    supply, at least. These sets tend to have leaky caps in several areas. If
    you don't get them all and repair the corossion and bad solder joints, you
    will have more problems soon, and sometimes you won't fix the immediate
    problem.

    We will not service these without going over every polar electrolytic cap
    for leakage, and testing the ones in key areas for ESR. Customers often
    balk at the higher cost of repair, especially when some yahoo garage tech
    says he can fix it for $100 after hearing it has a vertical problem. The
    fact is, if you just look to the vertical output circuit like you would
    expect, and don't pay attention to the rest, you will not fix the set
    reliably, perhaps not at all.

    Leonard
     
  5. Guest

    Yeah, i know. . I suggested that, but my parents are very stubborn.
     
  6. Guest

    Thanks for your reply, Leonard. I will have my parents mention this to
    the tech. His eyes are going to widen when he hears this. Might make
    him run out of the house!
     
  7. Bob  AZ

    Bob AZ Guest

    Take out the old chassis/TV and install a new TV in the case. Might
    take some woodwork and you parents will have a new TV in the case they
    like. There are lots of possibilities.

    Bob AZ
     
  8. JR North

    JR North Guest

    The easiest fix when the console is the valued component, is to yank out
    the offending TV and shoe horn in a replacement that will fill the CRT
    opening adequately. Some 2X4's, bricks, etc. work well for positioning,
    and some black construction board from an art shop can be cut for a
    mask, if needed. Make sure the IR port isn't covered.
    Done this a couple times....
    JR
     
  9. What stupid idea. The mits CRTs have held up exceptionally well. If the
    set looked good before the failure it is well worth repairing.

    Leonard




    Take out the old chassis/TV and install a new TV in the case. Might
    take some woodwork and you parents will have a new TV in the case they
    like. There are lots of possibilities.

    Bob AZ
     
  10. Option 1.
    a) Remove the chassis and and tube and properly dispose of them
    b) Measure the inside and the opening for the screen..
    c) But an LCD digital flat panel TV with tuner to fit the opening.
    3) Make sure to leave off the rear panel and make openings in the bottom
    and front as necessary for good ventilation and so the IR remote will work.

    Option 2
    Get a bigger flat panel TV to mount on the wall and push the wooden
    console set out the window into a dumpster. At $200 square foot real
    estate values, you will have picked up $3,200 worth square feet floor
    space in the house which will pay for a nice HDTV.

    --
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"©

    "Treason doth never prosper: what's the reason?
    For if it prosper, none dare call it treason."

    "Follow The Money" ;-P
     
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