Question about Sony KP-57WS500 57" Rear Projection Television

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Blure crt tube

How to replace crt tube

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Service manual explains how to do this..
The KP57WS500 service manual explains how to replace crt and perform convergence:

Posted on Dec 23, 2007


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NO, WE CAN'T. Fixya is a Q/A forum, we, members, all we can help other members is answering questions
You can try to find the part doing a google search using terms
View these videos how a CRT tube is replaced:

Replacing CRTs And Repairing RCA CTC28 Color Television

SimHelp Advice on CRT Tube Replacement

Now, just a guess: presuming you will find that CRT tube, maybe the job of buying and replacig the CRT tube of your TV might cost you more then a new flat panel TV? I don't know..

Sep 12, 2015 | Televison & Video

1 Answer


Check and replace the CRT base connecting socket. If it is faulty, focus to the picture will be effected, resulting out of focus picture.
Gopakumar Gopalan Google

Apr 14, 2014 | Sharp 29AGM2 29" TV

1 Answer

Philips 37pfl7662d 05

Sounds like a focus probem. Try replacing the CRT base connection socket.

Aug 17, 2013 | Televison & Video

1 Answer

Blured picture

Most common cause of this is Bad Coolant Fuild in Tubes ,philips is well know for having to change the Coolant Fuild in Tubes mostly the Green and Blue Tubes.Hers how you will know when TV is on Look down inside each Tube if picture is not clear ,then coolant fuild is bad.

Jul 02, 2011 | Philips 51PP9100D 51 in. Television

1 Answer

Lettering bluring or letter glare problem how to

your monitor maybe having hardware problems.
or check your resolution on your computer

Feb 19, 2010 | IBM C117 (Black) 17" CRT Monitor

2 Answers

Picture blured

Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change


2c07611.pngSolution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from that includes replacement coolant, photos. instructions, etc.

Apr 30, 2009 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

The monitor hjas lost its original colour,It potrays images that are a bit red and yellow.Its a Compaq V570

It's probably not a matter for adjustment, it's probably in need of electrical troubleshooting to find and replace defective components. It may be the CRT itself. One way they often fail is to show or lose one particular color more than another. These days a common 15" CRT monitor is probably not economical to repair by a brick-and-mortar service shop.

Jan 06, 2007 | Compaq V 570 15 in.CRT Conventional...

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Blue Saturation with retrace lines visable

could be but there are a few checks that need to be donr first.. Try to turn down the g2 control just a bit on the flyback transformer. If no effect unsoder the blure drive transistor on the crt board If the blue is still there that means the crt is shorted and you could try to clean the elements with a crt rejuvenator and see if that helps. If the screen goes to red and green after you disconnect the blue drive transistor then you need to check the osd drivers as well as the rgb output drive from the video IC. If the blue gun in the tube shorted or leaky I have in the past and it really works a isolation transformer that plugs in to the crt socket and the other end plugs into the crt. What this does is isolate the the gun of the crt from the filiments and thats where they get shorted or leaky but for how long it will last who knows.

Mar 26, 2006 | Sharp 36U-S60 36" TV

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