Question about Zenith Z60Z83R 60" Rear Projection Television

1 Answer

Repeated chip failure

The convergance chips stk392-110 are failing after 20-45 min, replaced 3 set of chips in convergance board and tried new board still same problem, when working look great convergance is perfect. any suggestions what would take out the chips? yokes ring good.

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  • norm  reece
    norm reece Feb 05, 2008

    yes the restors ok , tryed new board already same problem

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  • 4,402 Answers

Are the resisters ok?
i might suggest sending the board into ptscorp.com

Posted on Feb 04, 2008

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Will not power up has constant on off flicker , when I turn it on the green light clicks off and turns red and the cycle repeats. I have checked the fuses and also resolderd the power board. is there any...


Hi Eric,

First of all, thank you for contacting Fixya.com regarding on your TV problem.

I've suspected a convergence chips failure not the power supply board issue in this kind of symptoms. To confirm it, locate the convergence board inside the set, it has a Sanyo convergence chip STK392-110 that are mounted on the large heat sink. This board has a LED (light emitting diode) that will light up once the board gone to malfunction. Turn on the unit and then check if the LED will lit after the shuts down. If yes, then I would advice you to replaced both convergence Chips and check the resistance of the resistors in line with the +25V and -20V supply of the chips.
Let me know if the LED at the convergence board does not lit to continue our diagnosis... Check also the LED at the power supply board and on the deflection board(this is where the flyback transformer is located)

Have a nice day!

Goodluck and take care!

Kind Regards,

Jdvillanueva

Dec 03, 2011 | Pioneer PRO-99 TV

1 Answer

I have sony tv kp-65wv600. It has problems. color and video is blurry, double vision, letters are curved


You have a convergence failure.

Convergence IC failure is very common. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless

Feb 24, 2011 | Projection Televisions

1 Answer

On my HD1080 Mitsubishi projection flat screen 55809 the picture is bowed on top and bottem and it look as if the projectors themselves are offset, but the picture is clearer as you come toward the center....


It could be one of two things: Either a bad solder joint or convergence IC failure.

Convergence IC failure is very common. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless

Feb 20, 2011 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Have a sony 46 inch rear projection model #kp 46wt510! Purchased it new in 2004! Have nothing but great things to say about picture untill today! I have a color seperation with red, whatever line or...


Hi,
This is problem of convergence output chips failure and it is fixable.
Replacement of convergence output chips on D board will solve tv problem, local tv repairman will do this job because convergence output chips replacement requires soldering work on circuit board.
Thanks.

Jan 01, 2011 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

The left side of the picture has red and green stripes and ghost images. The right side does not have this problem, but the picture is not quite right. The convergence chips were replaced two years ago and...


That sounds like the convergence problem I had about a year ago, and like you, I replaced the convergence chips and that fixed the problem. It's cheaper to replace the chips if you do it yourself, but maybe not if you send it out for repair. If you can find an exact replacement board, that would fix it too, but I wouldn't necessarily expect it to last longer. The advice I read on replacing the convergence chips in my rear projection TV was that they would last 2 or 3 years and then need replacing again. So you're within that range.

Feb 27, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

A blue haze has appeared on the right half of the


This can be ( Haze (blue) i a failure of the color engine or convergence chips on the Sustain board/s This is not a DIY on this set. Manufacturer recommends replacement of all 3 boards when one fails. Otherwise the new board will cause a domino effect.

# nerw boards ($300) + labor. It is not a case of playing board swap jockey for a fix. It requires voltage balance between boards and the ability to measure voltage from circuit diagram points and to be able to correctly retune the convergence via a generated hatch pattern on the screen

Thanks for using FIXYA

Nov 26, 2009 | Sony Grand WEGA KF50WE610 50" Rear...

1 Answer

Ghosting and shadowing. tried adjusting the convergence red/blue but it will not adjust correctly.


Probably looks like red /green highlighting more pronounced
on the edges of the screen ,right?

The problem is one of the two convergence chips is failing.
In side the set there is a P.C. Board with two big modules (Chips)
screwed to a heat sink the prefix on the chips should read
STK or Sk followed by a number . those are the convergence
chips . They cost about 10.00 -20.00 etch and are not to hard
to remove and solder new ones in if your handy with a soldering iron.
That will fix the problem.

Or you can have a shop replace them for you
at a cost of 200.00-300.00 ouch.

They need to be replaced in pairs.

if you have any questions just comment and ill respond in kind.

Rob

Oct 04, 2009 | Philips Projection Televisions

2 Answers

Led light flashes thre times


I would initially suspect IC7001 and/or IC7002 on the D board. Those are your convergence output IC's. Those tend to fail after 5-10 years of typical use. Part# STK392-150 is available as a direct drop-in replacement part and repeat failures are almost unheard of. Also, check the low-ohm feedback resistors around these chips. R7011, 7012, 7013, 7014, 7015 and R7016 should all be 2.2 ohms @ 2 watts. If you have a shop do this, the typical price including travel and house call is $300-400. Parts alone are about $50, give or take.

Aug 18, 2009 | Panasonic PT-53WX53 53" Rear Projection...

2 Answers

My color is all out of whack on my SP-55W3HF Samsung. When I run the convergence alignment, I find that my red will not align. The red display markers are also bowed. Any ideas?


Your TV may have a convergence 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.
Here are some photos of convergence problems.

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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.

0667c5f.pngSolution

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 www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Jul 21, 2009 | Samsung SP55W3HF 55" Television

1 Answer

Blue spot on screen


Hi. this is called convergence failure. the convergence board is a circuit board that regulates the RGB(RED BLUE GREEN) streams that make up the color picture. If the convergence board chips are malfunctioning, you will see a distorted view of these RGB streams. This is what you are experiencing at this time.

Simply replacing the convergence board or chips will fix this issue.

Please rate and have a great day:)

May 17, 2009 | Projection Televisions

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