Question about Hitachi 55FX20B 55" Rear Projection Television

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Hitachi 55FX20B 55 in.

My hitachi 55fx20b needs a new power supply where can i get one or is it hard to make one

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Re: Hitachi 55FX20B 55 in.

I guess i wondering why you think it needs a new power supply, almost always the Bad components are replaced

Posted on Dec 05, 2007

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My hitachi 55fx20b has a shift in color. red, blue and green does not project at the same spot. what can be the problem?

It sounds like what is called a "convergence" problem; 3d looking with colors out of place etc.

Most of these sets use two of the STK-392-150 chips for this (see photo) and you can look inside to see which are in your set.

A pair of the chips on EBAY sells for about 13 dollars and the only other parts usually involved may be a resistor damaged when the chips failed----this is the exception rather than the norm.

If you or someone you know can solder, etc I can tell you the best way to get at the parts and everything you will need to do the repair; for me----I have repaired over 1,000 sets with this kind of problem.

I am attaching photo of typical convergence problem and what one of the STK chips looks like (chip is 2 1/2 wide/ 1 1/2 tall with 18 pins).

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


Aug 13, 2010 | Hitachi 55FX20B 55" Rear Projection...

1 Answer

My Hitachi Projection # 43DX01B light comes on on conssole but no picture or sound on screen.

Replace Both of your STK ICs they are big black ICs will have part number on then STK392-110s upgrade to STK392-180s better ICs Call Mats Electronics

Mar 16, 2010 | Hitachi 55FX20B 55" Rear Projection...

1 Answer

My hitachi tv keep turning off after 5 minuted of

I just got done putting my panasonic 50 projection back together. There is a thermal cut off relay on top of your bulb box, can normally be seen after removing the back of the tv. With the tv unplugged make sure the area around this relay is clean of dust. If the simple fix dosn't work make sure your cooling fan is coming on with the tv.

Oct 29, 2009 | Hitachi 55FX20B 55" Rear Projection...

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Hitachi 55fx20b TV protective screen cracked

Manufacturer Hitachi Part Number 3189847 Description SCREEN ASSY List $472.29

Aug 19, 2009 | Projection Televisions

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Low voltage power supply problem

Hi, I agree that the regulator IC is probably toast but you`ll need a service manual to figure the rest because none of the leds are on which means NONE of the secondary supplies are running, check the chemical fuses and I`m sure some will be open. you can go to encompass parts on the internet to order the sm, trust me you`ll fix it a lot faster, gl, video-tek

May 31, 2009 | Hitachi 55FX20B 55" Rear Projection...

1 Answer

Hitachi 55FX20B 55 in. Rear Projection - no picture or sound

TV always has high voltage shock risk while repair. As you said you are not familiar with TV repair so better to handle repair person this issue.

Oct 01, 2008 | Hitachi 55FX20B 55" Rear Projection...

2 Answers

Hitachi Ultravision

NEED TO CHECK the convergence ICs "stk _ _ _" , also check for some burnt spot (dry solder) around the power supply,
hope this helps AJ

May 12, 2008 | Hitachi UltraVision CineForm 55VG825 55"...

1 Answer

My Television Turns on, but there is no sound or picture, Is there a Resent Button?

There isn't any reset button. All you have to do is to take out the power source. Anyway, double check the wires... are you sure all are well connected?

Dec 19, 2005 | Hitachi 55FX20B 55" Rear Projection...

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