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

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Sony KP-46WT500 Convergence

My problem started with colors being separated and the picture was bowed inward at the center. I was told that it was a convergence problem and to replace 2 IC's, part # STK392-560. The problem is still there. I have been in the setup mode and tried to adjust with no success, I can make it worse but not better. It was also recommended that I replace or repair the digital convergence box. I can not find it. I have a service manual but can not find the part. Any ideas on what I should check or replace next. Any help is greatly appreciated. It been fun working on this but Iam ready to move on.

Posted by dcmj on

  • dcmj Aug 23, 2007

    I have checked everything I can find on this board. Everything checks out OK. Got any more ideas

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Anonymous

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Try this mate: download the manual from here: http://manualshark.org/p/sony-4/sony-kp-46wt500-5918/ you need to get 2 Sanyo STK-392-560 IC', Also do not forget to install a new coating of heat sink compound on the back of the NEW IC's before you install them onto the printed circuit board. You also may find out that after you replace these two IC's, the set has no big difference from what it looked like before. DO NOT DISPAIR! There are probably open feedback or return resistors or Circuit Protectors around the convergence ICs. Take a multimeter and measure the plus and the minus 22volts DC on both IC's. The manual will show you where these points are. You need a low wattage soldering iron, and you can go to mcmelectronics.com and find one for less the 20 bucks. Then you will need some rosin core solder, some solder wick, and a few good hand tools. It is very easy to unstrap the wires going to the chassis and simply turn over the chassis and unsolder the connections., BUT I highly recommend, if you have had no or very little experience unfaltering or soldering on a printed circuit board, this is NOT the place to be experimenting with this. Please call someone who has the experience. Good Luck.

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Posted on Aug 22, 2007

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Related Questions:

1 Answer

PICTURE IS BOWING INWARD AND THE COLOR . LIKE PERSON FACE IT WILL HAVE A SHADOW OF RED, BLUE, GREEN, YELLOW
Tv have a problems known as a convergence problems,it dead.Colors lines R,G,B mis alignment,have colors shadows or 3D pictures.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts are dead,must be replaced on the tv convergence board to repair the convergence problems.The shop,will cost u $300,350 for parts and labors.

Sep 14, 2010 | RCA HD52W58 52" TV

1 Answer

My screen to my RCA 56" HD TV is messed up. The picture seems to be bowed inward and the colors are all mixed up. I tried to do the convergence but it is not on the menu and I remember it being there...
t is the problem of convergence setting or convergence IC.
Comment by ready2helpu, posted on Oct 21, 2008 IF THE PROBLEM OF CONVERGENCE SETTINGS then check out this link 
http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html


if the problem of convergence IC THEN check out this link 
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

you can do it manually. 
thanks.

Oct 21, 2008 | RCA R52WM24 52" HDTV Projection Television

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I have a JVC 48' widescreen tv approx. 7 - 8 yrs old. the picture is now extremely bad all of the colors seem to be out of wack and the picture bows inward toward the middle at the top and bows inward...
There's a miror or one like this might have a ''aluminium sheet'' miror.
Open the upper back cover to see what going on there, pretty sure something run out of place...

Sep 08, 2009 | Televison & Video

1 Answer

Borders bowed inward,blurred red,blue, & green
the next time it is not working go into the customer menu with remote and call up the convergence grid and look---there---if convergence is way off and or comes and goes---this set uses 2 Stk-392-570 ic's and it is quite common to see them become intermittant.

Aug 03, 2009 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

Bowing of picture at top and bottom towards center.
Projection sets have two very common problems outlined below.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. The TV can also shut down when the convergence starts to fail.

Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith, RCA and others.


You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jul 12, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Colors have separated. and top and bottom af pictures are bowed. i have a sony kp-46s55. its about nini years old and it was free. currently the colors are separated and the top and bottom of the pict
nbad convergence ic , this need to be done by a profecional tv tech , because need to check for the pico fuse and resistor around the area

May 08, 2009 | Televison & Video

1 Answer

RCA D52W20 52" TV AUTO CONVERGENCE WON'T COMPLETE
Sounds like your convergence chip has gone bad. Usually costs about $300-$400 to fix. I would call a local TV repair shop and let them give you a free estimate.

Jan 29, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture
The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony,Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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1 Answer

Mitsubishi WS-65807 problems
You need the two convergence IC's replaced part# STK392-570. About a $300-$400 repair.

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2 Answers

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture
The convergence ICs probably have a cracked solder joint on the foil side of the circuit board. Re-flowing the the solder would help. I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts. To fix this yourself, you will need to be able to identify the two convergence ICs, have a basic knowledge of electronics and be able to use a soldering iron. You will also have to do an alignment through the service menu.

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KP-46WT500 46" Rear Projection HDTV-Ready Television

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