Question about Hitachi FDX Series 43FDX10B 43" Rear Projection Television

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Green Convergence Problem... Is it Convergence adjustment or replace STK392-110 ICs

Hi All, I just picked up a 43FDX10B from a friend who said it was "broken". I've fired it up and found that the green is significantly bowed downwards at the top of the screen (and very slightly at the bottom.) Red and Blue are fine (though Red is tending towards purple, but that may be a separate issue) I've tried the manual convergence change found here: Do I want to start messing with pots on the green, or do I want to replace the STK ICs? And if so... it looks like I need to take the entire "mother"board out of the unit, true? That looks to be fairly difficult... can anyone describe how to do it? Thanks Dave [email protected]

Posted by Dave Moreno on

  • Anonymous Nov 30, 2007

    we cannot adjust the blue convergence, any advise

  • thinzman Jan 06, 2008

    Green convergence bowed down starting at top to 1/3 down the screen.

    [email protected]



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You really need solid state elctronic experience to work on a printed circuit board unless you want to take a chance an bugger it up. Yes its the STK IC's and Yes you have to take the board out and unsolder the IC, install new ones and make sure you put enough heat sink compond on the heat sink, and then resolder them and then check the fusable resisitors and then fire it up and do a professional alighnmentt using a NTSC grade cross hatch generator. Its best if you seek out a pro to assist you in this repair.

Posted on Sep 16, 2006


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My screen is green and red, kinda like a 3d showing

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Blue convergence

Thats the classisc sign that you need to replace both convergence ICs. You will need two Convergence ICs STK392-120 and then six resistors they are RK42 3.3 ohm 1watt, RK46 1.5 ohm 1watt, RK50 2.7 ohm 1watt, RK54 1.5 ohm 1watt, RK58 3.9 ohm 1watt, RK62 1.8 ohm 1watt. You can get replacement ICs and resistors at the following link and they provide free instalation instructions with pictures so you can repair the set yourself. Heres the link.

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