When I watch my Sony KP-57WS500 TV57 in. Rear Projection Television, especially when the picture is dark, there are curved, blue horizontal lines that appear on the whole screen and are about 2 inches apart. Can anyone help me fix this problem?
Hi Guys
Your problem here has to do with the amount of aging that happens to the three colour tubes - red, green and blue.
Blue actually ages slower than red and green. What actually happens is the green tube deteriorates and due to green being the predominant colour for brightness causes the blue tube`s flyback lines to appear - especially when switching between inputs or when the video is blanked.
No replacing the blue tube will not solve your problem as the tube is actually the best one of the three.
As someone mentioned there is a way to adjust this by removing the speaker grill assembly in front of the set. Doing the service mode adjustment with the remote is not the right way to solve the problem - you would be adjusting the colour gain and off-set values and would seriously be compromising the white balance of the set.
On the left hand side behind the speaker cover you will see a black square block with six adjustment points. Look for the one marked SCR BLUE, Switch the set to a unused input so the blue lines become visible. Now adjust the BLUE point counter clockwise until the lines disappear. A small adjustment should do it, Switch back to a picture and make sure the whites are still white.
This should sort your problem. I would however suggest asking a Sony service centre to do this for you. This is a dangerous thing to do as you will be working close to the 35Kv supply the the anodes of the three tubes.
I hope this answers your question.
Goo luck.
Thank you Sibritis! Your solution was perfect.
This may be too late but I had the same problem. I fixed by removing the speaker cover and the cardboard cover under that to the screen controls underneath. You can adjust all three colors as necessary. I was told this may a temporary fix but I have not had any additional problems. I had to eventually adjust the green as well.
By your description, it does not sound like convergence. It sounds like a video issue.
Hi There are thing i need to know 1st, How long have you had the tv for and are if you goe into the menu is there any provisions for adjustments for convegence. zazwpx
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Thanks for the reply zazwpx
I?ve had this TV for about 5 years now but it only started to show up about 2 years later after purchasing it new. Unfortunately there is no menu that I can find to adjust the convegence. Any suggestions on how to get in?
With the TV off, On the Remote control press Display then the number 5 then the up volume then the power botton. This will get you to the controls
I have the same problem and have had the blue CRT tube replaced twice. I ordered one yesterday to come today for me to replace myself. Sony told me that the instructions were in my owners manual, but they are not. If anyone has instructions on how to replace the CRT tube, please advise. I have also found out that the problem may actually lie in the A-board with two chips that need to be adjusted by a technician in order for this problem to finally be resolved.
Solution:http://www.somelifeblog.com/2007/06/sony...
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