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Posted by parker (152.163.197.177) on February 13, 2003 at 14:29:20:
In Reply to: Re: Help - Mitsubishi Big Screen TV - Model VS-5004R posted by George_Sar on November 27, 2002 at 17:01:58:
: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!!!
: 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