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

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Tv has bad blue crt (pix tube) said the repairman

A local repair man came in the house & in 5 minutes came to the conculsion it was a bad blue crt (pix tube), i had done looking on the sony parts store and was given a price for the part of $146.. He gave a price of $375 to install (+ the $70 to diagno.), now is his price too high, is the tv worth fixing since he also said the red & green can also go not now but down the road since this is a common problem; can this be an easy fix for anyone, meaning could i try to replace it or just leave it upto a repairman? blue tube is out

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Blue tube is very common on this type of tv, His prices are very fair.My concern is the other tubes i usually could tell if the other tubes looked ok. If he says they seem fine.And you like this tv it is worth fixing. Make sure if you do say yes you get a 1 year warr on tube and a warr on labor,

Im not sure if you got price with yoke assy to or just tube. It is very hard to put yoke in tube and have it adjust properly. make sure when you talk to him it
is a new tube and yoke assy , If not dont fix.


thanks doctor video ladingedgeelectronics.

Posted on May 08, 2008

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My KP-51HW40 clicks off after running for a period. The red power light blinks when it goes off but screen stays dark. When TV is shut off for a while it restarts and runs fine. The "On"...


Hi,
KP-51HW40 shuts off due to incorrect white balance and blue arch lines is an evidence of that incorrect white balance. I hope tv standby red light would flashing 5 times then 3 seconds pause and again 5 times when tv shuts down.
This is rear projection tv that has three picture tubes (red-green-blue) inside to generate picture that projected at front screen. These three picture tubes must be drive with correct drive voltage to produce good picture of each color.
Solution for your tv problem is Screen Voltage adjustment that can be done easily if you are handy with electronics stuff repair.
Let me know your expertise level to guide you more and if you feel unconformable by tv repair then local tv repairman will help you to adjust white balance in tv.
Hope these info will help you.
Let me know if you have additional questions.
Thanks.

Nov 05, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Numbers and letters look blurry


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First of all,this is a major labor intensive repair on Philips TV's changing the blue CRT because the new CRT does not come with the coolant that is sealed between the lens and the tube.If you have never done this type of repair before you should not attempt. Changing the convergence board is one thing (you can solder in two STK392-120 IC's and repair the board instead)
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How to replace red crt on 52" RCA


When a red crt goes out and wont light its usually another reason such as a transistor or even faulty CRT pc board that causes it since the set powers up the other two tubes. Go to this link and leave them an email and list the model number and tell them the symptoms they will help you out with it, they are real good with the RCa sets. If the red tube was shot it would cause the set to go into shutdown or throw red retrace lines across the screen. Heres the link,
http://servicemanuals.vstore.ca/

May 21, 2008 | Projection Televisions

3 Answers

Blinking red power light - set will not turn on


Were the pale blue lines real thin in a slight diagonal from bottom to top of your screen? If so you either have a bad component in the blue drive, Blue CRT socket or your Blue CRT is shorted.Try removing the blue CRT socket and trying to power up your set for a moment without the blue socket attached to the tube. Be sure the CRT socket doesn't touch any components when you try this. Let me know if the set starts up without the blue.

Jan 23, 2008 | Projection Televisions

1 Answer

Vertical lines problem


On your blue tube there is a crt broad that may have a bad capacitor 4.7uf 250 volts most likely it can be leaky not able to hold correct charge also it might have video ic on same broard breaking down, this will cause your problem unplug crt broad from bottom neck of tube turn set on see if problem goes away if so then it means you have problem with crt broad or it could be your tube.Hope this helps you out!

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1 Answer

Sony big screen tv not playing picture after 5 minutes or so


You have a bad picture tube, or perhaps a picture tube drive problem.. To see what is bad, remove the front speaker grill under the screen in the front. Remove the screws that hold on the board that covers the front. Insidfe this set, WITH THE TV SET UNPLUGGED< Locate which one of the tubes is the blue one. Gently pull off the board from the end of the picture tube and swap it with the green tube right next to it. The green tube is always the middle tube. If the blue comes up again, then the blue tube is bad and you will most likely be better off to buy a new TV set. If the green comes up as the bright one, swap back the boards, call a tech and tell them there is a CRT driver board , or an RGB drive problem. This should not cost you an arm and a leg to get repaired. Good Luck, and let us know how you make out with the repair of this TV set.

Nov 11, 2007 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Repair of my big sony screen tv


You have a bad picture tube, or perhaps a picture tube drive problem.. To see what is bad, remove the front speaker grill under the screen in the front. Remove the screws that hold on the board that covers the front. Insidfe this set, WITH THE TV SET UNPLUGGED< Locate which one of the tubes is the blue one. Gently pull off the board from the end of the picture tube and swap it with the green tube right next to it. The green tube is always the middle tube. If the blue comes up again, then the blue tube is bad and you will most likely be better off to buy a new TV set. If the green comes up as the bright one, swap back the boards, call a tech and tell them there is a CRT driver board , or an RGB drive problem. This should not cost you an arm and a leg to get repaired. Good Luck, and let us know how you make out with the repair of this TV set.

Nov 11, 2007 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Picture has turned green


Possible green CRT bad....remove lower front speaker cover
and access panel.......carefully disconnect green PC board
from green CRT ( center tube )....plug in TV..power set....should have steady red/blue pix (no green) = bad green CRT............T.

Oct 27, 2007 | Toshiba TZ55V61 55" Rear Projection...

1 Answer

Tv has bad blue crt (pix tube) said the repairman


If you have a service manual or the experience to do this then I guess you can repair it. You do need a cross hatch generator to do an alighnment and sometimes an ocilliscope to adjust horizontal alighnments as per the service manual. Your paying for what the man took years to learn as repairing TV sets is not an overnight thing. As to the worth its up to you, do you wantt to invest this much money in a set that cost you a bundle?? How old is it? will answer your Question as they usually "made" to go for at least 5 to 7 years. After that its a crap shoot and if its older I wouldnt invest a dime in it. Unless you know how to repair it I would say buy a new one as the other tubes may go out a week from now or it could be 3 years from now as we TV techs are not fortune tellers. Good Luck

Aug 24, 2006 | Sony KP-51WS500 51" Rear Projection...

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