Question about Toshiba 50A61 50" Rear Projection Television

1 Answer

Convergence is off in the lower right and upper left corner

I noticed this morning that the convergence is off (significantly crooked) in the lower right-hand corner and upper left-hand corner. I tried to adjust, but the convergence 'cross' is out of whack as well. After playing with different adjustments for awhile, it suddenly fixed itself. Then I was fine tuning the convergence and it went crooked again. Any suggestions or ideas?

Posted by on

  • 1 more comment 
  • mac_deal May 23, 2009

    I called a local repair man earlier. He suggested that that problem was the power pack that supplies voltage to each tube/gun. Is this the same thing you have suggested or something different?

  • mac_deal May 23, 2009

    I don't think the repair man was suggesting changing the board. He said there was one 'power pack' per color and he suggested doing all three while in there. Could he be talking about the covergence amps or ICs....I think these are the same thing. Is fixing the covergence amps/ICS the procedure shown in the link you sent?



    Learning as I go here.....thanks for your help!

  • mac_deal May 23, 2009

    What is your recommedation on the resistors? Check, change, do nothing?



    I've read several different places that you may want to change the resistors at the same time as the ICs. If so, how do you know which to change....there seem to be many different?

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,959 Answers

The repair isn't too complicated if you're comfortable working with a soldering iron. Sounds like one of the "guns" is shot. The chips that need replacing are attached to the heatsink on the convergence board. The reason for replacing both chips is if you're going to bother to take the board out and replace one bad chip, that is the best time to replace the other older chip. The link below is to step by step instructions including pictures of the repair. You can check it out to see if you want to try it. If not, the repair is expensive (between 250-400) depending on the repairman. Best of luck with your convergence problem.
Greg

http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on May 23, 2009

  • 1 more comment 
  • Greg Margossian
    Greg Margossian May 23, 2009

    I really don't think so. I think one of the guns Red or Blue (Red seems to go first for some reason) is on its way out. The reason the repair is so expensive is most repairmen take the easy way out and order a new convergence board which is very expensive because it's much easier to install a new board instead of removing the bad chips and replacing them. I'm not a TV repairman by trade but I'm having my doubts about the info you received. Unfortunately, once you ask a repairman into the house to diagnose the problem, you're kinda married to him. (only thing missing is the best man and justice of the peace! LOL) You should get a second opinion if you have doubts but I'd take a look at the link I sent you. Wish you all the best m'friend and thank you for rating my solution. Much appreciated. : )

    Greg

  • Greg Margossian
    Greg Margossian May 23, 2009

    Okay, I guess the repairman was using different teminology but we were talking about the same thing. As far as I know, there are only 2 chips or power packs but I guess we're on the same page. I'm glad he's talking about replacing the STK's and not the whole board. It requires about 2 hours labor and the parts themselves are about $30. He will also check the board for faulty resistors. Good job doing your homework before picking up the phone. Most people tend to panic where their Big Screen is concerned! : ) Hope all turns out well. I'd be interested in knowing how you make out. All the best!

    Greg

  • Greg Margossian
    Greg Margossian May 23, 2009

    If you are having a repairman come in and do the repair, he should check the resistors for conductivity. Basically you check each one with a voltage meter. Only bad resistors should be changed. To change them all would take so much time and labor that a new board would work out cheaper. I'm sure in your case the IC's are the only repair needed but the repairman should do a check on the resistors while he has the board out.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Convergence


did u do a repair in recent days
by replacing the convergence ICs?

Jun 18, 2008 | Toshiba 43A10 43" Rear Projection...

1 Answer

The blue lines on the left lower side of the tv will not converge. The tv has never given me a problem. I woke up one morning and powered it on and noticed the blue is misaligned. I tried converging and...


This problems can happen to the DLP tv any times of it tv life.Tv is 100% have a convergence problems.The 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced to solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

Dec 03, 2010 | Pioneer SD-643HD5 64" Rear Projection...

2 Answers

Suddenly a curved line appeared in the upper left and lower right corner ....and words like "muting" and lower right words are doubled with a red virtual image....the main picture in the center is pretty...


Convergence problem---set uses two of the STK-392-560 convergence chips.

Both will have to be replaced and set adjusted with remote.

Total parts cost on EBAY under 25 dollars.


I can tell you what is involved.

see attached photo of typical convergence problem and typical convergence chip.

If this told you something you did not know, rate this solution as very helpful as I do this here for free.

SD TECH


7b6c73f.jpg




28f74b6.jpg

Sep 03, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Convergence problem. Lower left and upper right


Convergence is dead.Know how to solders? Must replaced 2 convergence ICS,and all it resistors.Tries website Tv repair World,com,Tvrpairkits.com for the convergence kit to repair it ur self.The shop will cost u $300 for parts and labors.

Feb 05, 2010 | Toshiba 43A61 43" Rear Projection...

1 Answer

My set is 10 yrs old. In the upper left and lower


Try adjusting the convergence. If it won't move see below- red IC in particular
This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 18, 2009 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Convergence problems


Convergence ICs are no doubt faulty and you could have a couple of open resistors near the Convergence ICs also. You can get the ICs and or resistors at this link. http://electronix.com/

Jan 02, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Convergence


Replace convergence IC's.
RE-check alignment

Oct 23, 2007 | Hitachi 46F500 46" Rear Projection...

1 Answer

Blue Convergence just went out?


High Voltage Capacitor? Leave the set unplugged for 1/2 hour most components will selfdischarge, as for your problem, being a Magnavox, you have one of two problems, the convergence I suspect is what is blown out, this unit probably uses STK392-110 Ic's, I would suggest replacing with STK394-160e chips as they are probably shorted, some of the big resistors (1 or 2) may be opened up also, usually they change color. The only other thing that would cause usually a yellow color in the corners is the CRT Fluid, it changes from clear to Orange in color and clamps off the blue color from the fringes, I suspect the chips need replacement, dont forget to put some heatsink dope behind them, they are usually on the left in the front of the set (from the back) Big long heatsink that is fairly tall (probably the biggest heatsink in the set.) Good luck, and the repair usually runs around $350.

Jul 13, 2007 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Green colors are seperated from rest


You might have a bad green convergence output IC either loose from the circuit board or open internally OR shorted. Stargazer

Apr 22, 2007 | Pioneer PRO-99 TV

Not finding what you are looking for?
Toshiba 50A61 50" Rear Projection Television Logo

Related Topics:

325 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74198 Answers

Jaime Hernandez

Level 3 Expert

2318 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

Are you a Toshiba Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...