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Red convergence is bowed only at top upper left corner.replaced both stk 392-120 ic's resistor are ok also any help would be greatly appreciated.

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  • wadeleth Sep 14, 2008

    the model# is 51MP3964H/17 OR CHASSIS #MAG1AA

  • wadeleth Sep 14, 2008

    THE MODEL# IS 51MP3964H/17 CHASSIS # MAG1AA MAGNAVOX TV

  • wadeleth Sep 14, 2008

    THE RED AND BLUE HAD DOUBLE IMAGES BEFORE REPLACING IC'S.BLUE PULLED IN AND ADJUSTED NORMALLY.THE RED IS ALOT CLOSER THAN IT WAS.TRIED SERVICE MODE BUT NOTHING TO MOVE ONLY REDADJUSTMENTS. ADJUSTS EVERYTHING ON RED AND BLUE NOT JUST ONE AREA.THIS IS THE SECOND MAGNAVOX I HAVE SEEN AT WORK WITH THIS SIMILAR PROBLEM WAS NOT ABLE TO IMPROVE OTHER TV.THANKS I WILL TRY TO GET A PICTURE SO YOU CAN SEE WHAT I AM TALKING ABOUT. THANKS

  • Anonymous Oct 13, 2008

    I have the problem can't adjust red

  • nckat101 Dec 22, 2008

    I have to same problem but mine is on the bottom and the left top of the tv. It almost looks like it is in 3-D.

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What is the model #?

Posted on Sep 12, 2008

  • experttv
    experttv Sep 14, 2008

    can you post a picture of what you see on the screen. does the red adjust at all in the convergence menu? left/right up/down? Also is this the SAME EXACT problem as before you replaced the stk's or did it change at all?



    Tim Nolan

  • experttv
    experttv Sep 14, 2008

    If you can post a picture of the convergence circuit area as well i would like to see it from the top and bottom of the board. You should be able to fix this problem, its very common and should be straight forward. I will provide any assistance you need.



    Tim nolan

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1 Answer

I have a double picture and the red apears to be


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 $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

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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

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1 Answer

Started see red and green in the tv picture and a funny looking line in upper left corner. words on screen are shaddowed with red and green


Replace both of your STK convergence ICs will have part number on them also ck pico fuses around ICs they will look green or yellow like resistors, but are Fuses.STK392-110 example.

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Check the resistors near the ic, and the fuses to the ic's, i bet you will find an open fuse. the fuse will look similar to a resistor without color bands. use a dvm and set it on ohms, with the tv turned off.

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Hi
The resistors are 39 ohms, metal oxide.
Usually both the stk392-010 ic`s (on heatsinks )
want swapping. You can get them off ebay..

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1 Answer

Red Convergence


Good day, enamual;

The Part number for the convergence IC's: STK 392-150, the originals are STK 392-110/120's, Hit recommends the 150's.

The part number for resitors; KIT 10. (includes IC's).

Contact: B&D ENTERPRISES; 1-800-458-6053; www.bdent.com.

I hope this helps.

Good Luck, big IRISH.

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1 Answer

Tv troubleshoot for me


chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try www.tritronicsinc.com. They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

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most like tes thats all your going to have to replace + the silicon as if you dont thet wil not last as long as they should. Also you may have blow fuseable resistors next to the ICs make sure you check them as well.

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