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Posted by George_Sar (147.27.28.29) on November 27, 2002 at 17:01:58:
In Reply to: Help - Mitsubishi Big Screen TV - Model VS-5004R posted by Rajan Rathnasabapathy on November 26, 2002 at 16:41:55:
: 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