Question about Televison & Video
24Voltage is dropped of supply resistance of Vertical Ic (LA7840)
Posted by Anonymous on
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Posted on Jan 02, 2017
If the line is vertical then the problem is no horizontal deflection. The vertical chip is probably fine.
Check connections around yoke (thats the connector with at least four wires that goes up to the coils around the neck of the tube)
Maybe that TV has two horizontal output transistors. One for deflection and one for high voltage? Check both of them. Look for bad solder joints!!!
Posted on May 22, 2009
Have you recently replaced its Line Output Transformer [LOT]?. If so have you replaced it with same type and number? Verical bars are due to LOT to Deflection Yoke mismatching. It is known as "Yoke Rigging" technically. Replacing the vertical Ic won't help in this problem . If you have replaced the LOT, the replaced one is not orginal. Ok
Posted on Oct 31, 2010
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