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

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Re: Green Convergence Problem... Is it Convergence...

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

The problem with the unit is convergence.Remove convergence output board then replace IC2701 and IC2702 both of them are STK-392-120,After replacing ics you have to go into the menu of unit to adjust convergence.Align the red ontop the green then blue ontop the green.

Oct 03, 2009 | Zenith R57W46 57" Rear Projection...

1 Answer

Green wave on left top and center top in my 43FDX11B TV

replaced both convergence ics in the tv.also check for open resistors near the convergence stk ics.

Jul 17, 2009 | Hitachi 43UWX10B 43" Rear Projection...

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Red vertical convergant line

convergence Ics you will need two STK392-120 convergence ICs. You can get replacement ICs at the following link with free instructions.

Jan 19, 2009 | Hitachi FDX Series 43FDX10B 43" Rear...

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Blue color cannot be adjusted

there are two ics trhat control the three colors alignments. Its always recomended to replace both Convergence ICs at the same time when doing the repair as they both share the green color between the two ICs.

Sep 03, 2008 | Mitsubishi WS48511 48" Rear Projection...

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If the red isnt responding via the remote you will need to replace the STK392-110 Ics as the service menu adjustment will not correct it 100% due to the IC being faulty and the red and half the green is controlled by one IC and the blue and other half of green is controlled by the second IC so without changing both ICs the set will progressively get worse. Both ICs are stk392-110. You can get replacements at the following link along with instalation instructions

Jul 13, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

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.

Jul 10, 2008 | Hitachi FDX Series 43FDX10B 43" Rear...

1 Answer


replace both convergence ICs they are STK392-110 you can get replacements at the following link with free instalation instructions with pictures.

Jul 01, 2008 | Hitachi FDX Series 43FDX10B 43" Rear...

2 Answers


Sounds like convergence ICs. Can you move the convergence adjustments in all four directions with the blue and red? If not its the convergence amp ICs both will need to be replaced.

Mar 01, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

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Red is way out of convergence/alignment

If the convergence adjustment is not moving the beam chances are the convergence IC(s) are defective. If you know how to solder and understand TV safety you may be able to fix it. With power disconnected remove the back. You should see two large heat sinks with large ICs (3 by 6 inches) with about 30 leads going through the circuit board. Numbers on the ICs should usually be something like STKxxx-xxx or some variation with x being a number. These ICs control the position of the three beams. If they go bad you can't adjust one or more beams. Replace them both as you don't want to get in there again in 3 months. Cost is not that much. or should have them at a reasonable price. Before replaceing the ICs look at the circuit board closly for cracked solder joints. Resoldering any bad joints might just solve your problems and avoid replacing the ICs. Good luck and remember safety.

Jul 10, 2006 | Toshiba TP55H60 55" Rear Projection...

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