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

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Convergence was bad, and after replacing now a black screen

We originally thought the convergence was bad because the problem was discribed on the message board by someone. My husband replace them both and now we have a black screen, no picture at all. Any suggestions on what is wrong

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Alot of times the convergence ICs will burn a resistor or one of the pico fuses depending on how bad the ICs were and how long the set ran with the convergence Ics bad. Its fairly common for the resistors to be burned open and they have no outword signs most times other times they may appear slightly discolored

Posted on May 09, 2008

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Posted on Jan 02, 2017

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1 Answer

Toshiba TP48C90 Convergence (replaced ICs, worked for 2 days)


Well, my thought is that there are a ton of knock off generic convergence IC's out there that usually hold up as long as yours did. Professionals like me will only use Sanyo original STK's. The counterfeit STK's out there are everywhere. Do some research on the web to locate Sanyo originals, they are out there.

Jun 11, 2009 | Toshiba Televison & Video

2 Answers

Convergence 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
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.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Mar 05, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

My JVC model number AV-56WP30 has a flashing convergence screen



Your TV most likely has a Convergence Chip Failure but I have not seen that symptom before.

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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
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.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Feb 28, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

SAMSUNG HCM4215W Rear Projection HDTV shuts down


Low ohm resistors are open or poor solder connections on the bottom of a convergence IC.

You need to look at resistors in good light with magnifying glass. Bad ones may show as discolored or burnt.

The repair needs someone that has the schematic for the convergence cct, and can replace the burnt resistors or replace the whole convergence board.

http://calgaryconvergencerepair.weebly.com/index.html

If you are near Calgary, call me, if not, find someone that has done it before, preferably many times.

easyab

Aug 12, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Hutachi 43inch rear projection 5 yrs old


Hi,

Hitachi Convergence

Check out the Convergence Gallery. If you see the colored outlines or color shading as in the Gallery, you have a convergence problem.

The repair for a Hitachi requires the replacement of the defective IC or ICs and any damaged or smoked resistors. Some models don't have a separate convergence board and the board is not usually available for the ones that do have a separate convergence board. Usually there is little alignment required after the repair. If you play with all the adjustments before the fix, hours may be spent re-aligning.

If you change the original ICs with substitute "new and improved" parts that are talked about in the blogs, you will probably create problems. Use the original ICs and resistors.

Don't monkey with it.

This is a delicate and difficult repair. If not done by someone with some electronic repair experience, the TV will likely end up as junk or cost considerably more for a tech to fix the damage done.

If you live in Calgary, call me. If elsewhere, find a competent tech.



easyab

Jul 30, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Panasonic PT53wx42


You can go the the following link they have access to remanufactured boards just leave them a email with your model and tell them your needing the signal board, and they will respond quickly.
http://servicemanuals.vstore.ca/

Jun 23, 2008 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

Convergence board


Your model uses a convergence IC Its a STK393-110 you can get a new replacement at the following link and they will provide free instalation instructions with pictures so you can do the repair yourself. They also offer free tech support to all their customers. heres the link.
http://servicemanuals.vstore.ca/

May 31, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Poor picture quality


The problem is probably the convergence power supply.The switching power supply chip on the convergence board will burn out, producing a rounded picture with 3 separate colors. The chip is a long, heat-sinked SIP (single-in-line package) located on the convergence board. You can find replacements on ebay.

Apr 03, 2008 | RCA P61927 61" Rear Projection Television

1 Answer

Convergence problem?


If it's OK when first turned on, I would suspect either bad solder connections on the convergence or power supply board, or capicators on either board heating up and breaking down. Pioneer parts are expensive, so I would look for a shop that can do component level repair. You may save about $100 or so.

Jan 18, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Convergence board


It wouldn't be the entire convergence board, you more than likely have a bad convergence STK-IC. Replacing the IC will take a good bit of knowledge and training as far as electronic repair is concerned, plus a complete convergence set up. In other words, unless your certified, you need to contact a tech. The convergence set up alone has driven men to drink.....

Aug 28, 2006 | Mitsubishi VS-45609 TV

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