Question about Sony KP-51HW40 51" Rear Projection Television

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Green arcs from bottom up with darkest one at bottom on dark screens

I have green arcs from the bottom lower left to lower right progressively upwards a few inches apart with the lowest arc being the brightest. I am guessing "convergence" ? problem but I know nothing. I am handy and IF I can do the adjustment please tell me how. If it is a component replacement, I will call a service guy. Sony doesn't have anything on their site. The TV is about 3 years old from Good Guys so, so much for those bankrupt people. Thanks in advance. Fred Adler San Diego

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These are problems with retrace lines. What you should take a look at are the settings for the convergence / retrace lines Basically you need to open the TV and the job is about 15 minutes to solve the issue with arched lines, either blue, greed, or red. There is a great how-to guide here:

Posted on Jul 02, 2007


There is a way to get rid of the lines, you need to enter a code from your remote to access a hidden menu. From there you can adjust the lasers in the tv(green lines)I beleive it is very sensitive though, if done wrong can reck the tv. Not sure of the code or directions on how to exactly adjust the lasers, actually looking for them my self. Hope i was some help though!

Posted on Feb 03, 2007


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I expect the answer to your question is YES! The convergence amplifiers are a common problem in many projection sets. When you search for the replacements you should find that the originals have been superceded by improved parts. Also be aware that when these parts fail, they will usually damage a resistor in the convergence yoke return path. The resistor must be replaced with one of the correct value or the convergence, though responsive, will be out of range.

If you find my suggestions to be helpful, please share with us some details so that others may benefit from knowing the whole story. Thank you!

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That model is older than 3 years old. If the lines are mostly visable when you select an input (video 1,video2 etc) that has nothing connected to it and they appear as faint lines that go diagonal then an adjustment wont cure the problem. Some of those set had faulty picture tubes from day one. You might only see green right now but in the futire the red and blue will start showing the same symtom. If pressing the flash foucus and goes through the process successfully then your convergence circuit is most likely ok. The CRT's range in price and now in most cases the blue and the green are no longer availiable and have to be pulled for a rebuild. I personally wouldn't suggest anyone go into the service menu unless they know what they are doing.

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