Question about Sony FD Trinitron WEGA KV-36FS120 36" TV
Sony KV36FS120 - 5 blinks. First TV would not come on at all. Repairman came and replaced the flyback hi output transformer. The TV will come on but the picture is very weak and goes out after only a few seconds but the sound stays up. Repairman thinks it needs a new picture tube but TV is only 3 years old. Any suggestions?
He replaced the Integrated High Voltage Transformer (IHVT) (I so hate the term flyback even though it is descriptive of the function of the component). However he may have only solved part of the problem. My next question is did he perform a diagnostic on the CRT (picture tube)? It may well be the CRT, but I would first suggest that you have the repairman check the voltage and signal levels in the horizontal section of the TV and check the video signal and voltage levels at the output of the Video processor to the CRT socket board. Then after these are tested and proven to be within specifications, then run a diagnostic on the CRT using a CRT test set. This way he'll know for sure if the problem is in the circuitry or the CRT.
I am suspecting that the first trouble you experienced was the set was completely out? If so that is why he may have replaced the IHVT. He should have also replaced the Horizontal Output Transistor because it is in series with the IHVT and would have taken some of the damage that the IHVT would have sustained. So having him check that too would not be out of sorts.
I hope this helps,
Posted on Nov 22, 2008
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Posted on Jan 02, 2017
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