Question about Sony KP-46WT510 46" Rear Projection HDTV

6 Answers

Convergence Issues... Need assistance with fixing convergence issues on our rear projection tv... Some background: This is the second time the convergence has went out on this tv - First time was right after the warranty ended (maybe 2 years after we purchased it and it cost $500 to fix it w/ hired technician). This last time may have been self induced as my 4 year old son took a squirt gun and sprayed the front of the tv where the speakers reside. The tv went out and wouldn't turn on for some time. It finally did and we heard some cracking from the speakers which was expected. We took the 4 screws out in the hopes of pulling the front cover off to dry it but the cover wouldn't pop out so instead of breaking something, we just left it and hope for the best. About half a day went by and the tv returned to normal but after about a week, the tv became blurred and concave w/ a half bend coming from the top center down. I performed a flash focus to no avail and when I tried to use the convergence screen, I couldn't even move the crosses... At a loss as I don't won't to spend another $500 to fix it when the tv costs $1200 just 5 years ago... As a novice, is this something I can fix if I had the right parts? Pictures attached. Your help is greatly appreciated.

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  • 14 more comments 
  • bs1028 Jul 13, 2008

    Big Thanks.



    Nevered soldered before but I'm assuming it can't be that technicial - Any recommendations for tools / product / etc?



    It sounds like I should get and replace the watt resisters regardless of condition?



    How much time do you think it would take for fixing the tv once parts arrive? Have three kids under 6 and want to make sure they're out of the house just in case I blow something up, ;-)

  • bs1028 Jul 22, 2008

    Which convergence resistors should I order? If found two from that website that are close in description and I want to make sure I order the correct ones.



    4.7ohm 1/2Watt 5% metal film resistors



    or



    47K ohm 1/2watt metal film resistor



    Also, are these parts (including the ICs) new or used?



    Thanks.

  • bs1028 Aug 10, 2008

    Finally getting around to try and fix this tv. Got the back open and taking inventory before disconnecting. Looks like their are 24 resistors versus 12. Am I viewing this correctly given the input about?



    Also, this looks pretty technical. All I need to do is start unplugging the cables going into this particular mother board and then pop it out for desoldering / soldering?



    Is there anything I should avoid touching?



    Thanks.

  • bs1028 Aug 10, 2008

    Also, should I be worried about all the dust - should I vacuuming it out or something? Thanks.

  • bs1028 Aug 10, 2008

    Confused. I have the 12 - 1/2 watt 5% resistors you mentioned but I'm counting 30 underneath / behind where the ICs go in?



    Maybe I should take a picture?



    Also, anything in here I shouldn't touch or is just "disconnect" everything from this motherboard...

  • bs1028 Aug 10, 2008

    Got everything disconnected expect these two red cables go into a tower like metal contraption on the rear left corner. How do they come out? I don't want to pull too hard and break something or possily be pulling them out from the wrong side...

  • bs1028 Aug 10, 2008

    Got it - Do I just pull it straight out or is there some sort of trick?

  • bs1028 Aug 10, 2008

    I hear ya - I'll try the pliers but it feels like I'm going to break something. Once I get it out - how easy is it to get back in...



    Just feel like I'm doing something wrong here given the other connections and screws were so easy...

  • bs1028 Aug 10, 2008

    Took a break but will try those red wires again a little later - just too much with kids around.



    Regarding the top portion - Should I try and clean / wipe those three pieces of glass that the lights come out of... or just leave them alone....

  • bs1028 Aug 11, 2008

    Getting a little nervous try to get the red cable removed from the HV splitter. Trying on and off for an hour and nothing. Obviously, the threat of getting seriously shocked is in the back of my mind. I've had the tv unplugged for 4+ days and before that is wasn't on for a month. Looking for reassurance as my novice technical skills are being tested...

  • bs1028 Aug 11, 2008

    Ok - Thanks. Will be going at it again when the kids go down.



    Picked up a tube of Silicon Base Heat Sink - .23 oz / 6.5 g - is that enough for the 2 ICs...



    If your up late - I may be pinging you (California for me)...



    Also, still confused about the resistors but I'll cross that bring once I get this motherboard out and get the new ICs in place...

  • bs1028 Aug 11, 2008

    ok - Just going to desolder / solder with that big red cable still connected to the HV splitter. Shouldn't be too bad as I was able to get the motherboard far enough out to turn upside down on a table...



    Forgot to get solder at Radio Shack but have some left over Kester Pocket Pak resin core solder - 60% Tin 40% Lead, Dia .031 / .75mm



    Is this ok?



    Also, may pass on the resistors as the ones sent to me as you point out (yelloe, purple, gold, gold) don't match any of the one's I see near the ICs... the ones on my board are 5 different colors...

  • bs1028 Aug 11, 2008

    Completed the task last night. Didn't mess w/ the resistors and now the tv is all put back together and working fine. Just did a Flash Focus and viewed Convergence but didn't have to realign anything. Does it realign itself?



    I looked at the resistors but none looked burnt or discolored. I'm going to hold on to those resistors just in case but I know they were different from what's in there now. I want to say one of the bands was brown. Not sure if that helps...

  • bs1028 Aug 11, 2008

    Big Thanks to you! If it ever goes bad again, I'll look at those resistors and give you a heads up as far the band colors and sequence.



    Thanks for everything.

  • bs1028 Oct 06, 2009

    Well - just about a year has gone by since replacing the ICs and the convergance has went out again on this tv. I never replaced the pico fuses because they weren't broken or discolored but wondering if that's why these latest ICs lasted only a year? Also, the pico fuses I received a different color band then the one's installed so I was hesitant in replacing them anyways... HELP!

  • bs1028 Oct 11, 2009

    (Originally posted separately under Conversion Issues... Again)

    Well - just about a year has gone by since replacing the ICs and the convergence has went out again on this tv. I never replaced the pico fuses because they weren't broken or discolored but wondering if that's why these latest ICs lasted only a year? Also, the pico fuses I received were a different color band then the one's installed so I was hesitant in replacing them anyways... HELP!

    See my original string dating back to July 2008;http://www.fixya.com/ThreadView.aspx?thi...

    Update - Heat Sink compound was applied and I tried the manual convergence adjustment via remote and also tried realigning the "crosses" via remote without success. Hard to believe these ICs would fail after one year?

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6 Answers

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I've looked online for the STK392-560 ics and have seen a difference in price from $5.00 to $30.oo. Is there any difference, if so, what?
Thanks.

Posted on Nov 18, 2008

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  • Sony Master
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Yes the Ics are easially replaced if you can solder. You will need two STK392-560 Convergence ICs and possibly the 12 4.7 ohm 1/2 watt resistors as Sony sets will usually weaken the 4.7 ohm. You can get the replacement ICs ad resistors at the following link and they provide free instalation instructions with picture as well as free online tech support in case you need additional help. Here is the link.
http://servicemanuals.vstore.ca/

Posted on Jul 13, 2008

  • 12 more comments 
  • Sonny Berry
    Sonny Berry Jul 13, 2008

    It usually will take about an hour to an hour and a half to do the repair, and yes I would recoomend changing the resistors as well as that can lead to premature IC failure. If you order your parts from the link I posted they explain which tools you need to make the job easier as well as the proper way to solder,But the best tools are a de-soldering Iron with rubber bulb to **** up the old solder available at Radio shack for around 14.00 then a thin tipped soldering iron also at radio shack for around 6.00 a tube os heat sink. !.29 at radio shack and then a roll of 64-006 solder at radio shack for 3.39

  • Sonny Berry
    Sonny Berry Jul 22, 2008

    4.7 Ohm 1/2 watt 5% metal films. All the electronical parts are new they identify used parts such as CRts and smoe cicruit boards in the desceiption

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    Vacuum will work best. Check the six pico fuses that are in line with the resistors they are yellow and look like a resistor without the bands. Unsolder one end of them to check as they will usually go if the resistors dont appear burnt. they are 3.15amp, but 3.5 amp is best for replacment if they are needed.

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    4.7 ohm 1/2 watt 5% metal film resistors. Their electronic parts are all new unless they specify used in their description. But the ICs and items such as that are all new products.

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    yes you can disconnect everything just label or map the wires so you know how to unplug them. You will be able to identify the resistor by the color bands on them yellow, purple, gold and gold. Those are the 4.7 ohms

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    also you shouldnt need to replace them all just the ones that check out as bad after you lift them out of circuit on one end. there will most likely be about five or six of them or so that need replacment on each IC as they will be out of the 5% tolerance. But check the yellow pico fuses first.

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    The large red wire is easier removed from the HV splitter which is at the other end of the wire where the other 3 wires comes out. The smaller wire follow that to the other end and that will unplug from the focus control block.

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    it will pull out but they are very hard to pull out. pliers with tape on the jaws to prevent hurting the wire will work best

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    they plug back in fairly easy, but come ot hard, if its too difficult you may be able to leave the large red wire connected and just flip the board over, but its easier if you can remove the whole board.

  • Sonny Berry
    Sonny Berry Aug 10, 2008

    yes you can clean the lenses, however dont use windex, just a damp cloth then dry with a soft damp cloth works best

  • Sonny Berry
    Sonny Berry Aug 11, 2008

    there is no danger in those two wires as they leak down within a half hour. the other 3 large wires can hold a charge but as long as you dont unplug the other three, you will be fine.

  • Sonny Berry
    Sonny Berry Aug 11, 2008

    yes thats plenty of heat sink. you just need a thin layer on the back side of the ICs.

  • Sonny Berry
    Sonny Berry Aug 11, 2008

    Yes the solder will work. The resistors should be the same as your model uses 4.7 ohm 1/2 watt resistors. What are the color bands on your resistors which are under the fins of the heat sink?

  • Sonny Berry
    Sonny Berry Aug 11, 2008

    congratulations on a job well done. Yes the set will align itself with the flash focus. You just saved yourself about 500 plus dollars doing the repair yourself.

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  • Master
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Here are some pics that can help you.
http://rapidshare.com/files/128789253/Convergence.rar.html
Here's a how to guide.I listed all soldering recommendations and stuff in it.

Posted on Jul 13, 2008

  • eagle338
    eagle338 Jul 13, 2008

    Shouldn't be too hard but beware some of the circuits hold high amount of electric charge even after disconnecting from the power supply. Wear tennis shoes for additional safety. After all your life and limb is worth much more than this.

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This solved my problem. GREAT instructions. THANKS

Posted on Dec 30, 2008

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Have convergence issue with KP-46WT500. If I disconnect the power supply and connect it back in a few days, everything is fine for a few days and then it suddenly goes bad. Have a second image (RED color) of everything on the screen.

Posted on Oct 14, 2008

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Hello, I am having the same problem. I have changed the one pico fuse that was open, I just changed all 30 resisters and of course I changed the convergence chips. Nothing has changed. Can you help or is it time to trash it.

Posted on Sep 13, 2008

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I have a couple issues. First, my screen is yellowing from the sides inward, and second, the picture seems a bit "blurry", even though it's set to 1080i and getting a signal from an HD...


The tv have a problems known as a convergence pictures problems it is dead.Tv have any colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?Yes,than the tv convergence board it is dead and the causes all of these problems.The tv convergence board must have be repair like replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost u like $300-350 for parts and labors.

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Two issues


I would suggest to replace the STK ICs first as suggested in your previous post and you might end up fixing both failures.
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It appears to be convergence issues. Red, green,


Projection TV2_bing.gif sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV 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, Samsung2_bing.gif, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith2_bing.gif, and others. You can get a convergenece repair kit from the link below.

Common Symptoms include....
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  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
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Here are some photos of convergence problems.

49abec3.jpg
f0add3d.jpg


Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash2_bing.gif focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution

93a1209.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

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OLD Hitachi 50EX13K rear projection TV now has bow shaped picture


Your convergence ic's have to be replaced along with checking all the bias resistors for exact value. Easy for me! I don't know what your electronics background is?

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1 Answer

Rear projection convergence issues


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

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

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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1 Answer

Convergence issues


The full downloadable service manual located Here! will have a list of all parts.
Below are a few remedies for convergence:

Subject

Poor convergence, IC8002

Symptoms / Customer Description
Customer hear a popping noise.
[Primary Symptom Code: 1436 ]

Solution

Found IC8002, IC8003, and fuse PS8006 defective on the D Board.

If you need repair assistance, go HERE!

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Is the power indicator flashing three times? If so the Ics have shorted shutting the set down. You will need two STK392-110 convergence ICs. You can get replacement ICs at the following link with free installation instructions.
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Hitachi 50ux22b has dark screen and general CQ adjustment issues


is the convergence off?
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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
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Sorry--You will need resources to fix this one. STK392-110 IC's need to be replaced,afterwards convergence alignment in servicer mode may be needed.

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