Question about Sony FD Trinitron WEGA KV-20FS100 20" TV

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My sony KV32 FX65B trinitron stopped working.. i took it to a technician and he said i needed to replace the FBT (fly back transformer) along with two transistors. I just replaced them and when i start the TV it starts off... the colors are not super bright and the image is shifted about 5 inches to the right and after 10 or 15 seconds it automatically shuts off. what's the problem now?

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Hi and welcome to FixYa,

Without voltage readings, it could be a number of faults in the horizontal section. If have not considered, possibilities are:

  • the FBT and/or the transistors was not an exact replacement or is a substitute;
  • the secondary output of the FBT is being overloaded;
  • H-osc & H-drive would have to be checked.
Unfortunately, due to unavailability of a schematic diagram I could not be more specific nor provide further information.

Good luck and thank you for asking FixYa.

Posted on Jul 01, 2009

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When it is shifted to right vice versa, it indicates a distortion on the horizontal output. Try replacing all the capacitors around the horizontal output area with the same original value. Make sure the horizontal output transistors you replace hasn't started going gone bad already if you know how to check them. Them dimness in the picture is caused by the horizontal output not putting enough high voltage to the CRT. Look for leaking capacitors too. Also replace the resistors around the horizontal output, they may have burnt out or changed in value from overloading cause by the malfunction of the flyback, and the transistor.

Posted on Jun 27, 2009

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