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I have an ultravision projection tv that the blue and red colors appear bowed and will not refocus. Saw a posting on the convergence ic? Please let me know how to fix this problem

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A lot depends on model number but most of the Hitachi sets use two convergence chips--most popular ones are STK-392-110 OR STK-392-150.

REPAIR involves getting at them and replacing them, only other part that fails is protect resistor around them. I will attach some photos so you know what the chips look like and what to look for if a bad resistor.

Total parts cost (if parts purchased on EBAY) will be under 25 dollars and typical repair takes about one hour.

This can be a do it yourself fix if you are handy. I can tell you what is needed.

If this information or the pictures told you something you did not know rate this solution as very helpful as I do this here for free.

SD TECH


I have an ultravision projection - 0f72769.jpg The black parts are the chips--number is printed on them in white.




dc5f54f.jpg
note the two resistors that are burnt in the middle, discolored. All of the resistors are easy to test.

Posted on Aug 22, 2010

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Poss. convergence problem with Hitachi 53UDX10B Ultravision


You have convergence problem. Either bad connections on ics, ics are bad or voltages to convergence circuit are missing. There are no bulbs in this set. 3 picture tubes,red,green and blue produce a picture than when alighned(converged) correctly on top of each other gives you a color picture.When not you get the effect you are describing. Frst you can try the magic focus in the menu.

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My screen to my RCA 56" HD TV is messed up. The picture seems to be bowed inward and the colors are all mixed up. I tried to do the convergence but it is not on the menu and I remember it being there...


t is the problem of convergence setting or convergence IC.
Comment by ready2helpu, posted on Oct 21, 2008 IF THE PROBLEM OF CONVERGENCE SETTINGS then check out this link 
http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html


if the problem of convergence IC THEN check out this link 
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

you can do it manually. 
thanks.

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1 Answer

Tv colors and bows


sounds like convergence ICs but I dont have any info available on the VS55601 model number.

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I have a panasonic big screen rear projection that i bought second hand and ablue streak appeared across the tv with a bow at the bottom like the blue tinge has bowed


sounds like the convergence ICs. Please post your model number and I will assist you with the issue. Please reply to this same post when replying.

Aug 08, 2008 | Televison & Video

1 Answer

PROJECTION TV HITACHI ULTRAVISION COLOR CONVERGENCE PROBLEM


it sounds like your blue convergence ic is getting weak you need to replace the ic's STK392-110 and you should replace both because when 1 is bad the other will go real soon. They are inexspensive at the sight I posted and you will also get free tech online support if you purchase them there.
http://servicemanuals.vstore.ca/

Apr 12, 2008 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

THE COLORS ARE SEPARATED (RED, YELLOW & BLUE ETC.)AND THE PICTURE IS NOT CLEAR. THE PICTURE IS BOWING AT THE TOP AND BOTTOM OF SCREEN. PLEASE ADVISE.


You need new convergence ICs this is a common problem on all projection TVs. Please post the model number of your set and I will post a link where you can order the new ICs and recieve free step by step instructions with pictures on how to do the repair yourself.

Mar 31, 2008 | Televison & Video

1 Answer

Hitachi Ultravision 50" projection Tv


This is an indication of convergence issues. There are two ic chips that control this and there is a likely hood of there failure and need to be replaced. there possible other issues with ouput resistors and fuses. At my shop the cost to replace these chips are 200 to 350. not a too difficult repair.

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1 Answer

Convergence


Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.hdtvoice.com/voice/showthread.php?t=28929
Or send to ptscorp.com
http://www.hdtvoice.com/voice/index.php?s=
good luck
please mark the post with a fixya

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1 Answer

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can you adjust any color of convergence in user menu blue, or red up or down left or right. if you can make any up or down left or right adjustments on any color then the likelihood it wont be a convergence ic. it would be a output resistor. so see if you can get any movement. with it being bowed i was suspect an convergence ic.

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Mitsubishi Vs-6047 Convergence Problem...Please Help!


usally convergence green is split between 2 ics. so if your blue and red are still good. it might be the green output resistors. The

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