Question about Mitsubishi WT-46805 46" Rear Projection Television

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Mitsubishi CK31MK2 -

The vertical is slipping. Once the TV is warmed up it stops. How can I fix it?

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In the vertical there are some caps you must replace them it could also be your pip board if that is the case replace the board

Posted on Nov 04, 2007


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Mitsubishi Vs-60705 Bigscreen turn on vertical roll warms up stops rolling and begins jumping up and down also picture is not clear

Check C2P05[ location on convergence board]. This is a 16volt 100Mf cap that is bad. And check out C2V29 [cap value is 16volt 22 Mf.] And still while you're at it, resolder the pins on the convergence ICs.Should fix your TV!

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Vertical output IC bad capacitors in vertical circuit 100uf 35v sometimes vertical IC needs to be resolder and that fixes problem look for poor solder joint s.

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The convergence IC's probably need to be replaced. Unless you are savvy with electronics, I would not attempt to fix it. Call a professional. I would estimate a repair cost of aprox. 280.00 to 350.00.
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I have the same TV built in 99. My problem is similar but the vertical hold gives out when the tv warms up about 5 minutes. I will attempt to locate the vertical hold circuit and replace any parts I suspects may be the problem. I suspect a cap is leaking or transitor around IC700 is degrading when warm.

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Picture is Rolling..stops after some warm-up

I have seen this many times. There is a 9 volt regulator on the small signal board that causes this. The regulator goes bad and the 9 volts starts dropping, especially at start-up when the regulator is cold. If the voltage is below 8 volts then the picture gets dark and the vertical becomes unstable, with the picture squeezing down and/or rolling. As the regulator warms up the voltage starts rising back towards 9 volts and the symptoms start clearing up. There are 3 regulators in a row on the board and the regulator in the middle is always the bad one. Replacing that regulator should cure your problems but it should be replaced by someone experienced in servicing Mitsubishi projection TV's because pulling the chassis out is quite tricky.

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