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

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KP-43HT20 convergence box

I bought this tv with a convergence problem. It was diagnosed as the convergence box. Top and bottom of the picture are arched in like a bowtie, and ghosting all over the screen, except dead center, which is probably about 80% o.k. If this sounds like the problem to you, I'd appreciate a part# and a service manual. Also, is this a high voltage component that needs discharge, or is it just straightforward r and r? Thanks

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Re: KP-43HT20 convergence box - Sony KP-46WT500 46" Rear Projection HDTV-Ready Television Projection Televisions

What the f... are you talking about?!!!!!!

Posted on Feb 08, 2008

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Re: KP-43HT20 convergence box

Remove PCB w/largest heat sinks.Locate STK IC's. Replace both IC's for reliable repair. Check pico fuses near IC's-if open,replace with same value. Note:No hv to be discharged.However,care is needed removing HV lead from HV block- Slide rubber cap back,push lead in slightly,turn cc 1/4,then release straight out from block.Easy does it!

Posted on Oct 05, 2007

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The picture on our Sony TV Model KP-43HT20 recently became distorted, concaving at top and bottom. If I use reset the Flash Focus, the picture will return to full screen side for awhile but the colors do...

The tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergene board have dead 2 STK convergence ICS and some or all of it resistors are dead too.These parts on the tv convergence board,must be replaced to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Jan 15, 2011 | Sony KP-43HT20 43" Rear Projection...

1 Answer

The picture all of a sudden became blurred , color convergence is not aligned and there is a pink wave at the top left of the screen and a green wave at the bottom of the screen. When the color is adjusted...

Tv have convergence problems,it dead.Colors lines R,G,B don't aligned.The tv convergence board is dead.The 2 STK convergence ICS and some or all it resistors are dead,these parts must be replaced to solved the tv pictures covergence problems.The shop,will cost u $300-350 for parts and labors.

Sep 18, 2010 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Colors don't line up, and screen is distorted on a sony KP43HT20

Problem #1) Convergence

  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...


Dec 08, 2009 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Green hue on KP-43Ht20 Sony rear projection tv

Behind the front cover you will see a little plastic box with six phillips headed dials. They only move 180 degrees. The three on the bottom control color richness and the three above them control focus. Turn all three of the bottom ones to the left while the TV is on, then gradually turn them to the right until you get the color you want. NOTE if any one of the three bottom dials are too far up the TV will shut down and will continue to turn off after about 10 seconds after start up until the offending dial is turned back a little.

May 17, 2009 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Sony KP 43ht20

there is a convergence problem inside the set you will need a good tech.

Aug 31, 2008 | Sony KP-46WT520 46" Rear Projection...

2 Answers

Sony kp-53s35 bowed picture on top and bottom

Good day, scotty1980;
Scotty, welcome to 2008. Hold onto your wallet, the has a convergence problem. Which means that the TV's convergence IC's are more than likely bad. The average cost to repair is about $450.00. Unless you are electronically friendly, I would call an authorized service dealer for repair.
Good luck, big IRISH. PS; Hope this was helpful.

May 04, 2008 | Sony KP-53S35 53" Rear Projection...

1 Answer

Blue and red color are off, picture is not clear

convergence amp ic bad
Sony Convergence

Jan 29, 2008 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Sony KP-43HT20 convergence problem

Replace STK-392-110s or 150s upgrade with 180s replace both ics.

Jan 04, 2008 | Sony KP-43HT20 43" Rear Projection...

3 Answers

Sony KP-43HT20 ghosting effect.

may have bad convergence amps stk392-560 board location Ic8001 Ic8002 or the dcu unit is bad or the alignment drifted off and it needs service adjustments made to it.

Dec 28, 2006 | Sony KP-43HT20 43" Rear Projection...

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