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Vertical line across picture tube on my Symphoic model WF2703.

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Is it just folded over with a thin line of light thru the middle of screen. It is a vertical collapse. Vertical Ic is loosing connection with the board or failing Already. resolder first then see if it can actually solve it. If not check capacitor or neighboring components within vertical circuit or replace the vertical IC and check if this solves the problem.

If your not inclened in electronics, have it service by a qualified one.

Posted on May 14, 2009

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Sanyo TV Model DS25500. Replaced fuse, but now it has a line across the screen? Does the picture tube need to be replaced?


Your picture tube is fine for now, but it won't be if that line is allowed to burn into the screen. You have lost your vertical deflection. Since a fuse was involved, that indicates that an overcurrent condition existed. You may have a blown vertical deflection IC, or there could be just a shorted diode, which caused the overcurrent, and subsequently burned a resistor in series with the diode, also acting as a fuse. It could be all three.

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Hello,
Sounds to me you have a cold solder joint ( loose solder connection ) on the printer circuit board around or on the vertical chip or on one of the vertical capacitors. You may also have a bad vertical chip or a bad vertical capacitor, but I doubt it since it did come and go. I'de get a soldering iron and some solder and touch up the connections. I will remind you that you need to always excersise saftey by making sure, before removing the back, unplug the TV from the wall, and use care not to come in contact with the large red wire going to the back of the picture tube as the picture tube can be turned off and still store lots of voltage ( up to 35,000 volts). Always stay safe and when soldering, use care not to run solder across places that will make a short.
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307-266-4675

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1 Answer

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The picture tube itself is not longer being manufactured and the replacement might exceed the price of a new TV.
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1 Answer

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You have defective Vertical output IC. This parts need to replaced to back to normal.

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if that look like horizontal line shuld be vertical problem. check vertical ic around it of resistor& capacitor. good luck!

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1 Answer

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The vertical hold keeps a normal picture from rolling either up or down. You don't have a normal picture (raster) here.

The problem you are having is a vertical deflection problem. The screen is being compressed to a thin white line. It's probably a defective vertical output module or transistor. This part is not too expensive. Less likely would be a vertical deflection coil, which would be more expensive because its usually glued to the picture tube and harder to replace.

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