Question about Symphonic ST419E TV
At first the picture was as if across the top of the picture had been folded down over itself - about 3 inches.
Now it is just a thin line of light across the center of the screen. Does it need a little tube, a huge tube or what? Is it worth having someone repair it?
Could I repair it myself, or should I take it to the dumpster? Thanks,
This is called field-collapse. Either
1. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor usually gets it working perfectly again.
2. The vertical drive IC has failed.
If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.
Posted on Jan 21, 2008
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Posted on Jan 02, 2017
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