Question about Panasonic PT-51HX41 51" Rear Projection Television

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Adjusting CRT yoke for convergence

I would like to slightly move yoke to get horizontal (topleft) to behave because pincushion does not get me where I would like to be when adjusting convergence in course adjustment. I'm not sure how you would move top of yoke without loosening clamp.

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Re: Adjusting CRT yoke for convergence

You shold not have to move the yoke. if the set will not adjust, find the problem in the convergence. It is probably an IC starting to fail. Good Luck

Posted on Aug 15, 2007

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I have a Sony KDP-57WS550 TV that has a convergence problem. Based on the symptoms, I'm not sure whether to indict the convergence ICs. In the convergence mode, I can move the red (and blue) crosses,...

With your TV in setup Use a small magnet to "move" the non converged Red, Blue, or, Green color lines "crosses" (each CRT will need to be adjusted in turn) by moving the magnet close to the offending Red, Blue or,Green color CRT yoke or, tube while observing the movement of the CRT color line "cross" in a mirror ( try several places near the tube and, several strengths of magnets:) a refrigerator sheet magnet works well (you can cut these with a scissors to make a better fit or, apply less magnetic "pull." by making them smaller (you may need more than one magnet per tube to fix each CRT's convergence) When you have each CRT tube's convergence right, apply some clear silicone adhesive to the magnet and, permanently affix the magnet to the now "fixed" CRT tube exactly where you placed the magnet to obtain the best convergence on the CRT.
(Do not adjust the "Green" CRT unless you must, as it is used as the color line to adjust other lines to)

Jun 30, 2011 | Sony Grand WEGA KDP-57WS550 57" Rear...

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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!

Aug 22, 2009 | Sony Projection Televisions

2 Answers

Cannot adjust red multi point

Unit appears to have poor convergence due to:
1. cross hatch appears tilted
2. one color (or more) being larger than the others.

The yoke or yokes may have:
(1) rotated slightly or
(2) slipped down during transport.

Loosen a yoke and lower to inspect the tape. If black tape is present remove it from under all yokes (white tape or no tape is OK). Slide yoke or yokes up tight against the CRT and tighten to prevent slipping or rotation. Precede with
alignments and or convergence as necessary.

Jul 29, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

Toshiba 65hdx82 convergence problem, pincushion

Your TV most likely a failure in the convergence circuits. ( 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.
Here are some photos of convergence problems.

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.


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

May 19, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

Toshiba 50H81 manual convergence

are you sure it's yoke? these are know for bad convergence amp ic's
other wise it's a screw and glue holding the yoke in place loose the screw and try to break the glue with out breaking the plastic on the yoke, the other thing you can do is adjust the magnets which have tabs on the yoke. i would mark the position's of everything on the tube with a sharpie so you can get it back to start.

Convergence amp ic bad
Sony Convergence

Jan 28, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Sony projection blue double vision KP-61XBR48 mod #

Joe, did you have a tech confirm it`s the yoke? Not a common problem to have a yoke failure, maybe yoke return resistor(s) or possibly bad convergence IC`s, poor signal from DCU (digital convergence unit).

Nov 29, 2007 | Sony KP-53XBR45 53" Rear Projection...

2 Answers

Toshiba 57h82

your convergence amp ic's./if you want to cheat/align the other two colors and manualy move the green yoke rings on the green picture tube neck so the green cross aligns with the red and blue.,they shuold form white when all three are aligned,on top of each other.

Sep 13, 2007 | Toshiba 57H82 57" Rear Projection...

1 Answer

Panasonic PT-51HX41 yoke adjustments

go back and check them resistors....with a magnifier and be sure of the color codes...I bet one is way off. and get the manual out confirm each resistor u replaced and even remeasure it. dont mess with yokes or nothing on them tubes! its on the board....check for solder splash too on bottom or shorted pins on stks. if you must just make a big x on screen from corner to corner now cover red and blue tubes. the green should be in center of the x if not move the adjusting 2 magnets near yoke to center it it will have tabs sticking out u might have to move both. after you center adjust red and blue to green. good luck

Aug 15, 2007 | Panasonic PT-51HX41 51" Rear Projection...

2 Answers


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

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