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Re: 56" RCA projection TV
If you can find the horizontal output transistor which is located near the flyback transformer,one lead of this drive transformer is connected to the base lead. (horizontal output transistor). There may be a little coil in series with this lead going to the transistor.
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ANy way you look at it you'll have to take it to the shop. A tech can use the secret service menu to adjust the vertical & horizontal size. Or you may have whopped up B+ issue, that could be hard to find so replacing the deflection board woul;d solve that, hope this helps.
the base to emitter of the hot will read short on a diode checker/test on ohms it vairies but typically about 50 ohms.e to c, or b to c should have very high resistance. unsolder the collector of the hot. make sure all solder is gone. now test the ohm between your tuner ground & the pad of the hot collector it should read open.
check the horizontal o/p transistor I suspect it's shorted, find location Q14401, on the board it's marked as q401. it's located near the flyback on a heatsink. if it's bad the rca part number is 242224.
If you mean they are separated like a 3-D effect, then you have the typical bad convergence IC problem. There are two IC's mounted on a large metal heatsink, they will have STK392-###, the ### being differant models of TV sets. these are soldered into place and are no usually replaced by the user, unless you have solid state repair experience, knowe how to solder, have a schematic on the set, and know the High voltage safty factors of projection TV serviceing. If you have no experience, please play it safe, and get someone who is trained to service TV sets. Good Luck
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