Question about Akai PTH5498 54" Rear Projection HDTV-Ready Television

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Yellow spots Have replaced the convergence board six weeks ago and now in the left and right bottom corners of the screen I have a yellow spot - what now

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As long as your convergence adjust properly the board has nothing to do with the new symptoms,yellow spots are associated with the blue picture tube,you can check for dirt on the face of the tube,you can check if the spots move like water when you move the unit to see if is short in fluid,be careful when checking with the back removed.You can cover the face of each tube to see if the spots are in the other colors.Let Us know if you need more help.

Posted on Oct 11, 2006

  • Omar Urrutia
    Omar Urrutia Oct 11, 2006

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1 Answer

Distorted picture


You have a convergence problem.On this model you can change the convergence amp board which has the convergence IC's on it making it an easy repair.

Oct 06, 2007 | Samsung HC-P4752W 47" Rear Projection...

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The top 10 inches of my screen is breaking into separate bands of grn/mag/yellow that continue across the tv till half way and then it skews to the top right corner. It started doing this about 2 weeks...


Ur convergence is dead.U Know how to solders?Must replaced the 2 Convergence ICS and all it resistors.Tries Tv Repair World.com,Tvrepairkits.com for the convergence kit to repair it ur self.The shop will cost u $300 for parts and labors.

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hello it sound like convergance may need setting go in to the menu click on convergance you should be able reset the picture
good luck

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1 Answer

Color convergence on our Phillips 46999302/17F



If you are not able to adjust the convergence using the remote you need to replace the convergence chips. 

Typical Symptoms

1) Convergence menu does not work for one or more colors.  
Example: RED moves up,down, but left or right fails. 

2) Screen is bowed looking.

If you have one or more of the problems above you need to replace the convergence chips. You can get a kit and instructions from www.TvRepairKits.com 

Jan 01, 2009 | Philips 43PP9202 43" Rear Projection...

1 Answer

I have a convergence problem. My Sony KP-65WS510 has a picture that looks like 3-D and bows at the bottom and top of the screen. I already replaced both the IC's STK 392-560 (2 qty.) and check all six 3.5a...


You have a convergence problem. Here are some of the most common symptoms. 
Screen looks 3D
One or more colors can't be adjusted when using the convergence menu. 
Screen is bowed in but stationary.

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. 

>>>Solution<<<< 

You need to replace the convergence chips and convergence resistors. 

Check the site www.TvRepairKits.com. They have put together a kit for your exact model. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself. 


Dec 09, 2008 | Sony KP-57WS510 57" Rear Projection HDTV

1 Answer

Yellowish spot on the lower left hand corner of tv screen


Good Day, There is a device that can be used to correct your concerns. Symptoms can be correct by EE PROM CORRECTION TOOL:
LSUQ0100. Instructions included. Try calling 1-800-458-6053. It's under $100.00 and takes about 1 hour from start to finish. Good Luck, big IRISH.

Jul 07, 2008 | Panasonic PT-52LCX65 44" HDTV

1 Answer

I replaced the convergence board but still have the same problem.


The problem is not with the convergence board. Its the Convergence ICs which are located on the sub board. Use two stk392-040 ICs as your model probably has the 392-010 now. But you can get two new replacement ICs at the following link and they will provide free instalation instructions with pictures so you can do the repair yourself. Heres the link you will need two STK392-040 Convergence ICs.
http://servicemanuals.vstore.ca/

May 22, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

WS-55809 - Video pinched in center, distorted, yellow/blue/red glow


This doesn't sound like a programming issue. I had a very similar problem about 6 months ago and I fixed problem. I had cold solder joint on the video power board. It was the board in the middle. The power supply was to the right. The video board had a driver with a bunch of legs. About 7 solder joint where cold or loose. I solder the board and my mitsu wide screen was fixed. Hope this helps.
Andy

Aug 22, 2006 | Mitsubishi WS-55809 55" Rear Projection...

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