Question about Sony KP-46WT500 46" Rear Projection HDTV-Ready Television

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Pincushion Picture on a big TV screen!!!

I have a sony (KP57WS500)57" big screen TV. I have a pincushion pictures on my green beams and on the red and blue beams the pictures looks perfectly find. When the problem first started was a double line or double images on my screen, so I reset the Tv colors and flash focus(converge) that didn't help, so I took the tv back cover off and check the CRT beams and all of them are function than I cover the red and blue beams with a card board and I notice the green beams pictures are not straight at all. It looks like a bow(pincushion) on the top and bottom of the screen. When I checked on the blue and red beams the pictures are perfectly straight. Does any body know where to adjust this pincushion pictures or have any clue whats wrong with it? Any advice will help-Thanks....

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Your convergence stick is going out, see ther is a set of two one that converges blue with green and the other with red to green cheak out you tube search how to fix your tv and look for convergence.

Posted on Mar 07, 2013

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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.

Posted on Nov 03, 2006

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    Omar Urrutia Nov 03, 2006

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1 Answer

My rear projection 51mp392h has color distortion on the bottom third of the screen,it curves up in the middle. Is this a picture tube


Hello tj444,

This is not a picture tube problem. This could be what is called pincushion distortion. It is caused when the is a malfunction in the deflection coils and the inability to correct for the curvatures caused by the CRT. The pincushion distortion can also be caused by the degradation of the functionality of the convergence amplifiers in the TV set. I would suggest that you have a TV technician examine the deflection circuitry and the pincushion circuit, this would also include the convergence amplifiers.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Jul 12, 2009 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Hitachi 50gx30B Pincushion problem


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

Thanks,
Dan

Mar 06, 2009 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

I need to find the pincushion circuit on my RCA F32632SB TV to check a problem with the TV displaying an hour glass picture. Where can I find a picture of this or a manual to guide me to the circuit?


The pincushion it intimately related to the horizontal circuits,the electron beam must travel farther to reach the corners of the crt and it does to the middle and so without pincushion circuits the raster would be bowed in on the sides on crts 27 inches are larger.Pincushion corrections straightens the raster by modulating the horizontal yoke current at a vertical rate.In an RCA tv the pincushion circuits are usually numbered 4800and the pin amp will probably be numbered 4801,its drive transistor should be Q4802,R4802 will be the width control,and R4805 the e/w pin amplitude. its inputs from the vertical should be Q4801 (subtractor) Q4803 (buffer) you should have a parabola waveform at 4801,yoke current can be modulated here without effecting high voltage.when Q4802 conducts voltage should decrease across Q4801 and the voltage drop across the yoke increases. The east west pin amp control 4805 controls how much of the vertical parabola is input to U4801 to compensate for changes in width caused by variations in beam current.By varying the e/w control resistor you can know if the circuit fault is in the input or output,if the picture varies in size the fault is in the input to U4801,if it does not vary check the output or U4801......hope that helps

Jan 15, 2009 | RCA F32632SB 32" TV

1 Answer

I have a pic problem is it fixable


If the picture is bowing in on the sides, this is called a pincushion problem. Please confirm that your model is KP-53XBR45 and I'll look up the probable defective parts.

Dan

Aug 26, 2008 | Sony KP-53XBR45 53" Rear Projection...

1 Answer

Sony Wide Screen Projection TV 46"


Can you post a picture of what the screen looks like? It could be convergence amps or a pincushion problem. The pic would help clarify the diagnosis.

Feb 26, 2008 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Sony crt tv 29" PINCUSHION PROBLEM


MY SONY DOES NOT DISPLAY NUMBERS ,VOLUME,MENU PANAL

Dec 14, 2007 | Televison & Video

1 Answer

Apex PF3230 TV with pincushion problem.


too dangerous for a home repair as this requires replacement high voltage components and adjusting the set with the back off while running.
Take to repair store.

Nov 08, 2007 | Apex Digital PF3230 32" TV

1 Answer

Is there an adjustment for pincushion?


CHECK THE CAPACITOR IN THE PINCUSHION SECTION OF THE TV MAIN BOARD

Oct 25, 2007 | Televison & Video

1 Answer

Blue pincushion


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

Sep 11, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Pincushion Picture


Lets try something before you call for a second opinion,with the tv ON and the problem showing hit the top and side of the tv,if the picture somehow reacts or corrects itself when you hit it call someone else and tell them what the problem is and that you feel it has a loose conection,dont have to tell them about the first estimate. Dont hit the tv with a hammer,just with the palm of your hand.Is worth the try. Good luck.

Sep 18, 2006 | Sony KV-29FX66 29" TV

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