Question about Toshiba 43H70 43" Rear Projection Television

4 Answers

CONVERGENCE PROBLEM IN TOSHIBA 43H70

I HAVE A TOSHIBA 43H70 I BOUGHT IN 2001 AND THE RED AND BLUE ARE OFF ON THE RIGHT SIDE. I HAVE TRIED TO USE THE CONVERGENCE BOARD TO STRAIGHTEN BUT MY RED WILLNOT MOVE TOWARD THE BLUE OR GREEN. ON NUMBER 1,3,7 THEY ARE RIGHT BUT ON 2,8 THEY ARE ABOUT HALF WAY AND ON THE 3, 6,9 THEY ARE WAY OFF AND SLANTED DOWNWARD. THEY ARE OFF ABOUT 1/2 INCH. CAN YOU HELP ME DIAGNOSE WHAT IS WRONG WITH MY TV OR IS IT WORTH FIXING. tHANKS RENEE AUSTIN

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  • raustin35 Sep 24, 2007

    So I need to get this part and do it my self or take it to a technician?If so is the price just outrageous or is it worth fixing?

  • Bob E B Dec 05, 2007


    I try to converge the blue and red can be moved, but the blue is off to the end of the +.

    Is there an adjustment to move the blue to the center?

  • Anonymous Jan 05, 2008

    Picture jumps and color is off. after 1-2 minutes unit shuts off. Tech. said the three color modules had to be replaced $450.00. He charged $70.00

    to tell me this but did nothing but look at TV. Is he correct and is TV

    worth the cost? Six years old.

  • gotlife Jan 28, 2008

    where did you get STK 392-110 find them yet onthe web?

  • Anonymous Feb 10, 2008

    I replaced the convergece board on my Toshiba 40H80, 40" projection TV because I could not adjust the convergence at all. Now I can adjust the Red and Blue, but the green is off to one side. I am thinking that perhaps I could manually adjust the green to get it close to the red and blue. How do I do that?

    Steve

  • Anonymous Feb 18, 2008

    convergence problems

  • Anonymous May 04, 2008

    my mum messed with the convergence screen on the 43" rear projection TV..i can place the red and blue in line with eachother..but the green is off to the left by some considerable distance. I was wondering if there is a series of buttons that allows you to adjust that particular section and that maybe my mum stumbled on this by accident...numbers 3, 6, and 9 are out of sinc by over half an inch.
    any advice would be graciously appreciated..ty

  • kgutzke Jul 15, 2008

    Had Tech replace convergence outputs 2 yrs ago with adjustments and all for $250 (good price) - BUT now same issue appears to be starting all over (picture starting to jitter on each side) and had to make strong manual converge recently and still not good as it should be. Now the question is -- should I repair or just give away? If anyone wants to offer me $350 for TV (43H71) with $200 STAND as it sits right now -- let me know. kgutzke@yahoo.com

  • utclawman Aug 28, 2008

    #8 convergence is way off

  • lagash50 Oct 22, 2008

    i have the same problem below,my model is 43vj22p

  • rgrnmry Jan 01, 2009

    I HAVE A TOSHIBA 50A61. THE RED AND BLUE ARE OFF ON THE LEFT MIDDLE, LEFT BOTTOM & ALL RIGHT SIDE. I HAVE TRIED TO USE THE CONVERGENCE BOARD TO STRAIGHTEN BUT MY RED WILLNOT MOVE TOWARD THE BLUE. THEY ARE HALF WAY ON NUMBER 3,4,6,7,9. THEY ARE RIGHT ON 1,2,8. CAN YOU HELP ME DIAGNOSE WHAT IS WRONG WITH MY TV OR IS IT WORTH FIXING.
    THANKS,

    MARY

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Hello Renee, You have a convergence problem, but you are adjusting the wrong system. You need to adjust the convergence rings first ok You need a dot and crosshatch generator to properly set convergence for this set. Connect the generator set the TV to channel 3 and turn on the generator set it to dots adjusting the convergence try to get the center dot RGB all together and then adjust for the outer edges using the convergence board. the use the crosshatch to adjust convergence along the lines of the crosshatch pattern. Remember use the rings first and the the convergence board adjustments.

Posted on Sep 24, 2007

  • Henry McKelvey
    Henry McKelvey Sep 27, 2007

    You will have to adjust the yoke transformer to do that. Or if your convergence board has an adjustment for that use it before adjusting the yoke transformer.

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I was told I need to replace my convergence output IC'S STK392-110's and also convergence generator. I was wondering where the convergence generator was and how to go about replacing it? Thanks!

Posted on Feb 29, 2008

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My Hitachi 43 UWX10B had severe convergence problem making it unwatchable. repaired by technician for $285 made this 5 yr old set work like new!
I lack equipment, tools and skills to diagnose and repair these rear proj HD monitor TVs..so I bit the bullet. hope it will last some 5 yrs or so.

Posted on Nov 24, 2007

I had a convergence prob with a Tosh' 43H70. The Green gun had a bend in the lower left hand side of the screen and red and blue looked bad. Ther are two large convergence driver IC's that control much of the convergence function. Their part # STK392-110 and cost about $14.00 each. You might want to find a geek who is good at removing and re-soldering parts on a typical printed circuit board. These IC's are quite large and are screwed to a set of cooling fins that are also soldered to the PC board.

Start by taking some digital pix of the back of the tv as you take it apart. There are some wire harness connectors that you will have to un-hook so you can pull the main board frame out, work slow and only take off the ones needed to pull out the board frame and flip it over to de-solder the IC's. DON'T try to take out the whole thing, just slide the board frame out enogh to flip it over. Make a drawing or note how many and where these connectors came from it will make it a lot easier to put it back together.

I used a good quality soldering iron and lot of "solder wick" to soak up the solder from the IC's and the heat sink cool fins and they came out pretty easy. There are a few small parts soldered next to these guys so be careful. After you solder wick the pins clean, grasp each pin with a small set of needle nose and move the pin from left to right and up/down to free up any remaining solder. Do the same at the heat sink solder point and the heat sink and IC should come out.

Add a dap of heat sink grease to the back of the new IC and screw it to the cooling fin haet sink and re-align the IC to the holes in the PC board. Have a helper ready to hold the IC in place and re-solder the cooling fins frist and then you can solder in the IC. TAKE YOUR TIME and work carefully.

After soldering the new IC's, re-check for solder "blobs" that may short two pins together. This is a BIG IC and shold be fairly easy to work with. If everything looks clean, re-install the main board frame and hook up all the wire harness connections. Be sure to put ALL the harness wires back into those plastic wire support looms to prevent arcing of the high-voltage CRT cables. (Large Red Wires)

My TV looked like a new unit after I re-converged it. Parts cost $24.00 total. Good luck..... Alex

Posted on Nov 22, 2007

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My Toshiba 43H70 started having the blue bow up at the bottom. Green and red are good. Convergence will move it a little, but not enough. Any ideas?


Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from www.TvRepairKits.com and do the repair yourself. Its a fairly easy DIY fix.

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I HAVE A TOSHIBA 43H70 I BOUGHT IN 2001 AND THE RED AND BLUE ARE OFF ON THE RIGHT SIDE. I HAVE TRIED TO USE THE CONVERGENCE BOARD TO STRAIGHTEN BUT MY RED WILLNOT MOVE TOWARD THE BLUE OR GREEN. ON NUMBER...


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Replace both STK392-110 convergence IC's with Toshiba or Sanyo brand........no cheap junk IC's !!!.................T.

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Did you check the resistors that power the ICs ocasionally 1 or 2 of them will go open when the ICs go out. They are located right next to the ics. Remove one leg of the resistors out of circuit, you will no doubt find one or two that are open and need to be replaced.

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You have bad convergence output ic's part #stk392-120. you will likely have to a technician intall these for you.

I’m happy to help further over the phone at https://www.6ya.com/expert/dewayne_4a10eab6caecdb92

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If the blue color is curving inward on one side, this is caused by one of the convergence IC's which has burned out. There are 2 large black convergence IC's mounted on large metal heat sinks and one of them will have to be replaced and that should be done by someone experienced in repairing and realigning convergence circuits. Some shops prefer to go ahead and replace both at the same time, removing the STK392-110's and installing 2 updated STK392-150's, which is not such a bad idea. When I do a housecall to repair a set like that I charge $150, since the IC's are about $7 each and it takes about an hour to change them, so ask around the shops in your area and see if anyone's price is better than $500, which sounds way too high.

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