Question about Sony KV-32V25 32" TV

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Sony KV-32v25 low brightness and little color

I have a 32v25 thats about 10 years old.  I'm not a TV technician or electronics expert.  The TV started losing brightness and got to the point where it was hard to watch during the day. (Lightness sensor off) and colors have a dull green cast.  When the lightness sensor is on, there is almost no luminance.  I found the service code and was able to change SBRT from 22 to 60 and get some brightness back, but color is still dull.


Pulled circuit boards out and look for cold solder joints but couldn't see anything obvious.


Question, tube going bad or something else worth fixing.

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Re: Sony KV-32v25 low brightness and little color

It's more than likely the tube, my friend. The chances of it being a power regulation problem is kind of remote at this stage of the game....accordianman

Posted on Oct 20, 2007

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Please try to remove the cover of your TV..

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All the other colors are mixtures of those colors. The yellow picture indicates that your set is lacking sufficient blue drive.

First of all check to make sure that the tint control is not misadjusted.
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The color signal consists of Red, Green and Blue. Those three colors, at various degrees, make all the other colors on your screen.

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Hello oilreddye,

This sony (KV-36FS120) is a flat screen CRT type Television not LCD. However the problem you are describing sounds like a CRT problem. I posted this before and I hope it is helpful to you,

This may be a CRT problem. From what it sounds like i.e. dim picture, colors not bright. If you have a background in electronics I would tell you to check the voltage levels on the CRT pins and compare them to the values on a schematic, however if you do not have a background in electronics, I would suggest you taking the TV to your local TV repair shop and have them troubleshoot your problem.

Here is a possible list of things that might be wrong:

1) CRT going bad (The shop can try CRT rejuvenation if needed)
2) High Voltage on the anode not at proper levels (The shop can check this with a HV probe)
3) Video output levels low (The shop can check the voltage and signal levels on the CRT socket board, and on the video amplifiers).

These are the three primary possible issues.

I hope this helps,

Thank you,


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1 Answer

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The color is also starting to shift a lot and cannot be fixed by adjusting COLOR-BRIGHTNESS-PICTURE in the video control menu system. Nothing seems to correct this. I've even unplugged the TV over night to see if it needed some sort of reset. Model = KV-20FV12. Purchased in 2004

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Sorry to say, it sounds like a bad picture tube, But could be also the capacitor that filters the screen voltage on the crt drivers. In all my years though, your complaint has been the picture tube. Good Luck.

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