My mitsubishi vs-45607 45 inch screen keeps shrinking then pops back to normal. This happens continuous. I was thinking the picture tube was about to go. Is there anything i can do myself. Please help me. NFL season is about to start.
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Re: TV screen shrinking from top to bottom.
My Dearest, j30;
It sounds like you have a problem in the 9 volt circuit which feeds the vertical output ciruit; CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
This is not a repair that a novice should try, but if you call a factory authorized service center and have them come out and give you an estimate; AND tell them what the problem is, you will look know what you are talking about!
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when picture is getting smaller in size or goes away or moves towards one side then hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer
remove the top back panal screws (be carefull the mirror is connected to the panal! do not drop!) now wipe off and clean the three glass lenses inside..also wile your in there clean the inside of screen and the back panal mirror You will see a big improvment in picture!!
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it isnt worth it, your verticle diflection is out, that board is about 3-4 hundred, and you would probabily need a service center do it(messing with like 30000 volts)and they will probabily charge around 200