Sony BRAVIA KDL-52W4100 52 in. LCD HDTV Logo
Posted on Jun 01, 2010
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Vertical line I have a 52" sony bravia and after moving it in the house there is now a vertical line in the center of the picture that appears when objects move across it while watching tv, dvd any ideas?

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  • Master 1,099 Answers
  • Posted on Jun 01, 2010
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Hello,

Most probably the vertical deflection amplifier is failing. The most common part that fails is the vertical output transistor.
The set is too old to find documentation on part numbers and descriptions. Probably the part is no longer available and you will need the assistance of someone who can help you find an equivalent transistor that will do the job.
Of course, without testing we cannot be certain the failure is the output transistor. It could be from something else such as the voltage regulator that feeds the dc line to the vertical section. Could be the vertical synchronous level that goes too low to trigger the vertical sweep generator.

Other bad parts in vertical deflection circuit though there are not that many parts that would kill the deflection entirely.

Loss of power to vertical deflection circuits. Check for blown fusable resistors/fuses and bad connections.

Loss of vertical oscillator or vertical drive signals
Good luck.

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