Question about RCA P52926 52" Rear Projection Television

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RCA 52in projection TV convergence problem?

Hello, Somehow while looking for resistor assortment kits I ended up at this site, and found other people having similar problems to mine. One day after a lightning storm the TV started to display a hourglass picture and the colors were severly out of convergence. While trying to adjust convergence through the menu the TV would shut off numerous times. Another dedicated person spent hours adjusting the convergence so that it was watchable but the screen is still hourglassed. We took it to a repairman turned police officer who fixes TV's in his spare time and said that the light box needed to be replaced and a whole cascade of stuff needed to be replaced as well but did not go into details. Upon first powering it up everything was fine for a few hours, and then the problem occured again. I was not in the room at the time so I am not sure how the transition from good to bad occured. So I am wondering what direction to go in now, the repair was around $300 initially and aside from throwing the TV out or giving it away I would like to try fix it. I am an electrical engineering student so I am familiar with circuits and such, but of course the education is focused on construction rather than repair. Would checking the solder joints on the convergence IC's, and checking resistors and capacitors for opens/shorts be a good first step? Should I just try to replace the convergence IC's and see what would happen, would it be worthwhile? Aside from that what would some other circuits in the TV that are suspect to failure of this sort be?

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  • Darren Rauckman Dec 20, 2006

    Thanks for the reply!

    I am not living at the same place as the TV and this is going to be a Christmas holiday "project". So thanks for the info and I am going to follow your advice as soon as I can get my hands on the TV. That said I am just trying to find out as much info beforehand so that I am armed with a bit of knowledge. I just found out that recently there has been sound issues that have developed. I am not sure if it is just the channel (since the person who told me said that it only happens on certain stations, and it is small town normal cable so I dont think it would be a surprise that its the channel itself) But I thought that mabye someone may have had some experience that would relate to this. There is a "buzzing" noise that is intermittent on certain channels. Would this have any effect for possible troubleshooting directions?

    As well, after trying those suggested steps, and finding everything seeming to be normal should I order the convergence chips and change them? Could this be something other than the convergence part of the TV?

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Look for connector J19105 which may not be seating properly. Unfortunatly by trying to adjust the convergence, you may have to go back and redo those adjustments if the connector is your original problem. Otherwise, using a good magnifier and checking over the connections around the convergence IC's and looking for burnt resistors might be a good second step.

Posted on Dec 20, 2006

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1 Answer

How do you fix the convergence on a big screen television? R52WH77 Picture showing red, blue, and green lines on top of the screen.


Projection TV sets have two very common problems oulined below.

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.
  • No Audio/Video - TV Makes Chirping Sound
701cb04.jpg
77ea520.jpg
f0900cb.jpg
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 www.TvRepairKits.com. 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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


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

Dec 24, 2010 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Double vision


Your TV most likely has one of two 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
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 www.TvRepairKits.com. 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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


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

Dec 22, 2010 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I have a r56wh78 rca tv that the colors wont converge, can it be fixed


Your TV most likely has one of two 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
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 www.TvRepairKits.com. 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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


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

Dec 21, 2010 | RCA HD52W59 HDTV Projection Television

1 Answer

I have an RCA 52in Rear Projection TV. One day it


There is a sub-board in this set that powers the convergence circuit. Often a big Ic shorts, two diodes and finally the main fuse. not something you can fix yourself.

Nov 05, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

RCA D52W23 52in HDTV red and green ghost and bowing lines


Ur convergence it dead,need convergence kit,use what in that kit,U know to solder? Tries websites Tv Repair World.com,Ebay.com

Oct 06, 2009 | RCA D52W23 52" HDTV CRT TV

1 Answer

Where are the convergence chips and resistors (pico fuses) located in the rca hd52w59 hdtv projection tv?


There are none in that chassis. You can get the convergence option missing repair kit at the following link and the kit contains the parts and CD with instructions. www.tvrepairworld.com

Sep 12, 2009 | RCA HD52W59 HDTV Projection Television

2 Answers

Convergence chips and resistors


In order to assist further, more information is required. You indicate that there are some discolored resistors on the board. There should be a marking on the board at each location like: Rxxx Where the xxx is a number. If you can post the numbers here for the parts that are discolored, I can look them up in the service manual for you.

Thanks,
Dan

May 21, 2009 | Zenith R40W46 40" Rear Projection...

1 Answer

Picture no sound


If you will look I bet you'll find a switch on the back of the TV for internal or external speaker. It's probably gotten switched to EXT. somehow.

Dec 27, 2008 | RCA P52937 52" Rear Projection Television

1 Answer

Blue convergence


DO you have 2 possible solutions

1.--Look under the CTR ( picture tubes) for leak coolant , all the times this set leaking, if is positive, use alcohol 90% with a bottle spray, clean the area, tied screws gasket ctr and let dry for 6 hours minimum.

2.--Loose connections on the left chassis ( convergence board), re solder ( look for possible resistor born)

Aug 05, 2008 | RCA P52926 52" Rear Projection Television

1 Answer

RCA HD52W59 CONVERGENCE ISSUE


Hello n0lcl285,

I gave this advice before and I hope it helps you too.

You may not have to buy a new board. It just might be the Convergence Amplifiers that have gone bad. You may just want to replace them first and then see if it corrects your problem before getting the whole board. The convergence amplifiers are easily identified they are tow big black modules attached to a big metal frame called a heat sync, normally it will be located on the right rear section of the TV set looking at it from the back or it would be located in the middle rear of the set looking at it from the rear. In any even look for two big six sided black components with 21-22 pins, now this is the important parts some electronics parts stores sell what are called Convergence Kits (Yes this problem is so common that they have put kits together to repair this issue), they contain the two modules and the biasing resistors needed to properly do the job. You will have to order the kit for your make and model of TV if they do not have a kit, you will have to use a schematic diagram to find the values of the biasing resistors needed. Once you have the modules and the biasing resistors, you will have to de-solder the modules and the associated resistors and replace them with the ones you purchased. You will also need to detach the modules from the heat sink clean the heat sink (with alcohol) and then attach the new modules (with a new application of heat sink paste, which is the white stuff the you removed with the alcohol) with the screws you removed to detach the modules. Once the modules and biasing resistors are installed you will need to turn on the TV and then perform a convergence setup, your TV most likely will have an auto convergence alignment setup feature on the setup menu , use this to do the convergence alignment setup (check your users manual for help in doing this). The cost for this repair will be as follows:

2 STK392-1XX series Convergence Amplifiers $4.00-$15.00 USD Total $8.00 - $30.00 USD

9-10 biasing resistors $5.00-$10.00 USD (multipack) $15.00 USD

Solder $5.00 USD

Soldering Iron $20.00 USD

Silicone Heat sink paste $6.00 USD

de-soldering brade $5.00

The cost of materials will be about $81.00 on the high end.

The cost of a new board will be about $150.00 - $200.00 depending on the vendor.

You can buy replacement boards from a manufacture approved vendor outlet, go to the manufacture's site find support and parts they should have a listing of supported vendors. I would suggest calling the vendor and ordering from the phone asking them to send you an RMA for the part (board) this protect you from having them asses charges without delivery of product.

You will need the schematic diagram to help you install it schematics can be purchased at http://www.servicemanuals.net
for about $19.00 USD.

I hope this helps,

Thank you,

Shuttle83

Jul 15, 2008 | RCA HD52W59 HDTV Projection Television

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