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Posted by robert gordon (63.187.81.72) on October 12, 2003 at 22:06:50:
In Reply to: Re: Help - Mitsubishi Big Screen TV - Model VS-5004R posted by Claude Moore on August 27, 2003 at 12:20:00:
: : :i just got mine fixed. the reason it worked w/ unplugging it for a while then restarting is because it is the power supply.it isn't getting the hi fequency's to turn the tubes on. if you had sound 7 no picture before hand this would be a positive. if there is no sound then it's fried all over more than likely & you need a new power supply. if you have a good technician he can rebuild it . @ $ 200.00. hey it's cheaper than a new big screen!!!
we have a mitsubishi big screen model 5052 that just went out of alignment today, we tried aligning the grid but it only shows the middle of the screen...all we can see are shadowing of either red or green....can you help????
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: : : Does any one have experience with Mitsubishi Big Screen TV fixing the power problem I think ?
: : : : I verified al fuses; OK. When press remote to turn the power I hear few clicks no picture and no sound.
: : : : Few months ago I experienced similar problem when I removed the wall plug for few days and then plugged it back to my surprise the TV started working. Now the same trick is not working.
: : : : Any recommendation is appriciated ?
: : : : Regards,
: : : : R. Rajan
: : : It's very difficult to say what may be the cause on that shit.
: : : First of all check the ac-plug on the wall! the cord and the connection to the supply.
: : : Check the fuses again.Sometimes ,because of high voltage overload, the transistor in the chopper circuit, gives a nice shortcircuit between the emitter and the collector .That usually burn a fuse.
: : : Check the horizontial oscillator circuit
: : : Check the rectificaton circuit(bridge etc.)
: : : Chexk the overload protection circuit
: : : Check power electronics elements (such as thyristors etc.)
: : : check the solder in the elements feet(do they connect to the printed board?)
: : : Good luck
: : : G.Sar
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: You have a common problem with the power supply system in your set.. it has been my experience that a combination of power supply components can be weak or leaky as it is called contact me via e-mail and i can help with the problem... ps i have 27 yrs. in the repair business
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