My Mitsubishi VS-60801 picture will roll from time to time and it is
getting worse. In small older televisions there is a button you
can turn to stop the vertical roll, but not this model. It used
to only roll on commercials, but now it will roll once in a while when
watching a regular program. This is annoying. It does not roll
when watching a DVD. I tried switching my satellite cable box with
another one and the picture still rolled and the other tv that I hooked
it up to didn't roll, so I know it is the tv. A tech walked me through
with all kinds of different things by checking cable connections,
reprogramming, etc. but he just gave up and could not suggest anything.
We live far from a TV repair shop, but I know how to change circuit
boards if I know what it is and can get a new one if that is what it
is. Help me if you can.
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Re: The picture rolls vertically sometimes.
I would check the capacitors in the verticle deflection circuit. Also try resoldering the verticle output as well as the verticle yoke pins where they connect to the chassis. Mitsubishi has had some trouble with their capacitors, you may have one that is leaking. Let me know if I can help you further.
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The sync is automatic. There are no knobs to turn. If the picture is rolling, look first to the source connection and make sure your tv has a solid vertical sync connection. If you are using the RF input then the issue could be within your small signal board also known as the SSB. Good luck.
A rolling picture or loss of vertical sync can be caused by several components including a bad signal board or jack panel assy. You will not be able to resolve this yourself. contact a Mitsubishi authorized service center.
The problem may be related to bad capacitors on the PIP module. This is a commom fault as vertical sync runs through the PIP board and this is the symptom of the pip board having bad capacitors the TV rolls.
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.
Does you set have PIP (picture in picture)?
If it does then the PIP module has a bunch of capacitors that have gone bad (dried out and leaked) causing you to loose vertical sync.
Vertical synchronization is what locks your picture keeping it from rolling.
Even if you don't have PIP then still you have a vertical sync problem.
The set would have to be checked by a tech to find exactly what's happening.
There is no vertical hold in the tv circuits now adays. You may find a vertical center or a vertical height. Your problem sounds like (if it has PIP Thats Picture in Picture) its in the PIP module and its a small module that stands up and most models of Mistubishi this module is no longer availabvle. The problem with the module is the small pana caps are leaking and ruins the PC traces. I have heard that theres a kit available on E-Bay to jump out this module. Now if its not the PIP model then it could be a few capacitors in the vertical sweep circuit. Also the B+ feed off the Flyback that supplies voltage to the vertical output IC could have a bad or leaky capacitor in the circuit. If your not a tech or solid state troubleshooter theres not much you can do and SHOULD take this set in to a repair center. Good Luck