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

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Replacing the blue crt - Help!

The blue crt on my kp-57ws500 is shorting, so I was told by a tech. He said it would cost me around $500 to fix it!

Problem: the tv turns on for a few secs and then shuts off. Once the blue crt connection was pulled out the tv stayed on, and this is how he verified it was the blue crt. He tried tapping it gently but this did nothing.

Are there any step by step instructions to change the crt's? How much does a blue crt cost online?

Posted by on

  • atldesi Apr 14, 2008

    Is there a site specifically for the sony model tv I have? This site talks more about projector crt's :(

    Thanks

  • atldesi Apr 14, 2008

    Thanks man...appreciate the reply I wanted to try a self fix...def not worth spending $500-600 on it after 5 years..

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I know this isn't going to be what you want to hear (and I see the rating left for Jamie), but the tubes are extremely similar. The replacement of the tube is not easy in projection TV's.
You have special cooloing liquid that sits between the tube and the projection lens that sits on top. This is expensive stuff to buy, and not very easy to work with when refilling.
The tube is going to cost a packet due to the fact its the blue tube. Even in CRT projectors, the blue tube always goes way before the red or green. The manufactures know this, and will charge accordingly.
If you decide to do this then you have all that plus once it's all installed, you then have to have the correct service remote to do the calibration correctly.
I don't want to say it, and I know you don't want to hear it, but these TV's after they go in the current priced electronics market are not considered ecconomical to repair unless you dearly love the set.
The other bad news is now the blue has gone, the red and green will probably go in the next 12-18 months anyway.

I am not trying to talk you out of the repair, just trying to let you know what you are in for.

Posted on Apr 14, 2008

  • Peter Thompson
    Peter Thompson Apr 14, 2008

    On the upside, at least the repair bill is several thousand 2 months after the warranty runs out on your new plasma =)



    There is always a bright side.



    Ok, if you are SURE you want to do it, then get the part number from your current tube. There are of 3 different part numbers for red, green and blue that will be almost the same.

    Do an online search and see what turns up. The reason you will be better to search is just because it came out of the same "company" dosn't mean it was made in the same factory, at the same time etc etc, so you will end up with different tubes in different sets.



    The fluid is an antifungal coolant that can be hard to find and you may need to order it in.



    This stuff gets messy quickly. Put some old rags inside the set to cover all the boards. Take the projection lens off, drain the fluid out.

    Next remove the tube (make sure you have removed all the wires from the neck ect.) There will be a few botls to remove, but they will be obvious. Gently lift out the old tube.

    Do not throw it away yet. You may need to remove the brackets to remount onto the replacement tube.

    Put it all back together, and then the fluid replacement will vary depending on the method in your set. You will see how it is done clearly, some have a filler hole, others you have to fill up the hole, then carefully refit the projection lens. Make sure their are no air bubbles in there.

    Bolt it down tight, but not over tight.

    Reconnect all the HV cables etc to the new tube.

    Then your into the calibration, pending all went well and the fluid didn't leak onto the circuit boards.



    Sound like fun.. =)

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  • 2,267 Answers

Go to this site to get more info on how to work with CRTs.
Good Luck.

Posted on Apr 14, 2008

  • Jaime Hernandez Apr 14, 2008

    Well, sorry that it did not help you much.

    I though you understand more about the projectors CRTs. Your TV is using them.

    If you need more instructions on how to change the CRTs, get the service manual.

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