Question about Sony KV-27S42 27" TV

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Dark Picture I have a 5 year old White-Westinghouse WTV1903 TV. It blew the fuse and I replaced it (12V 4Amps). It was powerd up OK and after off for half hour and on power up, blew the fuse again. I replaced it with 5Amp fuse, and is working fine except that the picture is now really dark. Brightness and contrasts were set all the way high. Can I get the brightness up? Thanks. Rao

Posted by rao vadapalli on

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I'm not sure how to help you with this one as the unit you describe does not match the one listed in the thread. You talk about a WTV1903 TV but a Sony KV-27S42 is listed. One thing is for sure no matter which model you have you should never exceed the manufacturers rating for the fuse (which is not meantioned). You stated that a 4 amp fuse (12V) blew so you put in a 5 amp. You never raise the fuse rating. Larger means more current draw and the possibility of a fire. First put the correct size fuse in. It should be listed on the circuit board or in your literature. If the picture is dark either the CRT is bad or the High Voltage or screen drive is low or both. The fact that it is blowing fuses indicates that something is not working properly. You need to check the CRT with a tester. If good, check the High Voltage for the correct value. If this is good you could have a partially shorted flyback. If you are not qualified to work on these circuits, (they are dangerous) have a qualified tech do it. Good luck and don't put larger fuses in in the future!

Posted on Jun 26, 2006

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