Question about Zenith D61W25 61" Rear Projection Television

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Possibly convervence pincushion

I was constantly correcting the focus and eventually, the blue went into a pincushion effect and I'm not shure what teh problem is. It is too out of alignment for the convergence to fix. Does anybody have a solution to this problem? Any info would help.

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Re: Possibly convervence pincushion

Replace both of the convergence IC's and you will be ok then.

Posted on Sep 19, 2006

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My Sharp Aquos TV Model LC-30HV4U (1) has a large black triangle in the middle of the TV screen, and (2) the letters of words that appear on the screen are in reverse order and so are illegible.

if you the reset option once you try resetting ...

if you still persist the problem i think there will be some problem in the tube in that area ...

Sep 05, 2008 | Projection Televisions

1 Answer

I have the opposite of a convergence problem. green pincushion cannot adjust so green is higher on left and right than center (bow tie). BUT red & blue will adjust and proprerly converge over the...

makenamicro, there is still a convergence yoke the green crt which means there is still a drive control circuit that controls your dynamic and static convergence. If you are working with out a service manual it is still possible that one of the convergence power amps is out, since you mentioned that you can adjust the red and blue to conform to the green pattern then try to adjust the green with out the R/B present if you ca not still adjust you green pincushion problem then suspect one of the power conv amps or a defective green conv yoke.(don't forget to check the small value resistors usually around 2 ohm and the pico fuses if the tv uses them. good luck and i hope i answered your questions, please let this web site know if yes by leaving some pos feedback. thanks!

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I have a Sanyo PLC-9000NA. The projector image is all out of whack. It's extremely out of focus. It only comes slightly more into focus a few inches from the lens. And the image I see when I'm holding a...

That is posibly a convergence grid in the menu , I am unfamilliar with this model so unsure . However I do know that if you have a crt projection tv the tubes direction and pincushion should all be adjusted to the one point . Now if they where before and are not now this could be for three reasons off the cuff .. 1 .The set was moved and the projection settings didturbed ?.
2. the set is quite old and had constant use therefore the tube resonance is failing and they want either boosting or replacing
3. power fluctuations in the scan coils caused by component failiure ( resistors change value with age and heat ) changing scan ratings .
Hopefully it is number 1 and all you need to do is go into your menu select convergence and crosshatch if you have one and reset .. if not an engineer will be needed to attach a crosshatch generator to the set while he manualy turns the tubes to converge them again.... Regards Vortash

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This is an indication that the STK is bad. The PC board should be marked to indicate which one if for the green.


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Please let me know in which direction the picture is distorted. Does it bow in from the top and bottom or left and right?


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Tv Colors are bad

You have a convervence problem. You will need to replace both convergene chips and possibly the resistors. You can get more information and a repair kit with instructions from 

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Shannon you have a blue convergence failure. this problem can be repaired in home, by a good tv repair guy. John

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Most projection TVs have an option to refocus. For example, my Sony rear projection TV has a button on the front for focusing the lamps. Try finding this button or option in the menus with your remote. Projection TVs actually use three lamps, one red, one green and one blue. These need to line up exactly in order to form a good picture, and when they come out of focus, you see the edges which sometimes has the effect of a 3D image when you aren't wearing 3D glasses. Hope this helps!

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Pincushion Picture on a big TV screen!!!

The set has 3 IC's(one for each color)strictly dedicated for the aligment of each color,if one them does not align is because is going bad or is already bad becuase picture can not be adjusted,the IC's can be identify because they are mounted on a heat sink and have the markings STK--- ---,they are all the same and need to be replaced with an exact replacement.If you are familiar with tv service you can replace them,sometimes the new ones need to be aligned from the service menu,you will need the service manual,soldering and unsoldering will be involved,If you are not too familiar be safe and seek the assistance of a servicer.

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