Question about Sony KP-57WS500 57" Rear Projection Television

1 Answer

Amps replaced...still getting 3D pix. The amps are not getting power. HELP!

OK. I replaced the convergence amps but the picture is still 3D like so they are not getting power. How do I trace/repair the source.

Posted by on

1 Answer

Re: Amps replaced...still getting 3D pix. The amps are...

Hi Brulia

There should be approximately 8 to 10 fuseable resistors around those convergence ics. They should stand out as they are a bright yellow colour. You should measure a short over them. If none of these are faulty I would leave the supply to the convergence alone and rather check the +5V / -5V and +12V supplies used by the convergence logic ICS. A common problem is the - 5V supply also used for your HT-protection cct op-amps. These ics goes short and pulls the supply to ground. There is no protection on these before mentioned supplies and therefore the set is still switching on but with a convergence problem.

Hope this helps.

Posted on Nov 04, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

4 Answers

Toshiba TW40H80 40"

ok! maybe you have defective convergence correction circuit! sir do you have experience in electronic repairing?

Oct 11, 2007 | Toshiba TW40H80 40" Rear Projection...

1 Answer

3d picture

You Need To Replace The Convergence Is Either Out Of Adjustment Or Replace The Convergence Amps. It Is Not A Typical Do It Yourself Job And Will Most Likely Need To Be Taken To A Specialist. It Can Cost Anywhere From $300 To $450 So May Not Be Worth It To Have It Fixed. If You Feel Maybe You Can Replace Them You Can Either Ask Here For More Info Or Google It.
Michael Scott

Jul 14, 2009 | Toshiba Projection Televisions

1 Answer

Picture looks like it's in 3D mostly the "red" color is off

Need to replace both convergence amps and any related resistors that may have blown open.

Jun 13, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

I just repaired my convergence issues. The set worked for a couple weeks and I unplugged. Yesterday i plugged it back in to use and now I have sound but no picture. I checked for voltage at the projecters...

You didn't repair your Convergence issues...TV's that shut off or have NO PICTURE have full blown convergence amps....

Get a new pair of Convergence amps and replace them...

Mar 16, 2009 | Toshiba 50HDX82 50" Rear Projection...

2 Answers

Replacement STK numbers for convergence amps

This unit does not use the STK series convergence amps.The convergence power supply is what you need.I will provide that number for you after while.

Jan 19, 2009 | RCA P52960 52" Rear Projection Television

1 Answer

First color alignment problems then no pix or sound, just chirpin

If the unit is chirping your convergence amps are out again,or you have a shorted Horzontal output transistor. Not likley for horz output to go out after convergence repair. If he did not replace the 6.8 ohm resistors along with the convergence amps the convergence amps would overheat and short out again.This would explain why the corner would not adjust out. Not a very good buisness practice on his part.Here today gone tomorrow?

Jan 15, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

Amps and resistors

The IC is no doubt bad due to powering it up with the solder bridge. may possibly need entire convergence board unless you have the service manual and troubleshoot it.

Mar 05, 2008 | Hitachi 53SWX12B 53" Rear Projection...

1 Answer

3d effect

Sounds to me like your convergance amps are on their way out...

Nov 21, 2007 | Zenith R56W36 56" Rear Projection...

2 Answers

My Picture is in Red and Green??

This is a convergence problem. From your menu, go to Menu, Function, Convergence and then use you remote to try to adjust your colors. If you can not get them to line up this is a problem with the convergence board. The convergence amps (STK392-040 x 2)are internally shorted. These can be replaced or the whole convergence board can be replaced. It's cheaper to replace the amps, but more convienent to replace the board (especially for the less electronically inclined!! :) Hope this help you out....

Aug 22, 2006 | Akai PT4298HD Rear Projection Television

Not finding what you are looking for?
Sony KP-57WS500 57" Rear Projection Television Logo

Related Topics:

33 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Projection Televisions Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers


Level 2 Expert

103 Answers

Jason Harris
Jason Harris

Level 2 Expert

256 Answers

Are you a Sony Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides