Question about Hitachi 50FX48B 50" Rear Projection Television

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The colors on convergence dont line up I get a green line. blurry double picture on tv ( the red & blue do line but I dont get a white line)

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It varies but most of these sets use two of the STK-392-110 CONVERGENCE CHIPS.

BOTH MUST BE replaced and the protect resistors (easy) looked and or tested.

Total parts cost if purchased on EBAY will be under 25 dollars and if you have some talent it can be a do it yourself fix.

Chips are side by side and have the STK number printed on them and are either on two heat sinks with metal fins or one large sink.

I have fixed hundreds of these sets and if I can do it anyone can.

I will attach photo of what typical chips look like and typical convergence problem (no two sets look exactly the same but you will know)

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

If you have questions make a comment here and I will assist you.


sd tech



the colors on convergence dont line up I get a - f751396.jpg typical convergence chips




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protect resistors for the chips, note the two that are burned or black in the middle--all are low value and a bad one will either be burnt of read likethe colors on convergence dont line up I get a - 2978ee2.jpg.



2978ee2.jpg

Typical convergence problem--most of the time just replacing the chips will cure it.

Posted on Aug 22, 2010

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Sounds like you need to do a color convergence. If you still have the owner's manual, it will give great detail on how to do this. The convergence menu is accessed from the video menu on the tv.
The tv has three color picture tubes, red, blue and green. The convergence alignment adjust each tube so that color from each tube overlaps each over to create a white image on the screen. Most tv's only allow you to adjust the blue and red colors.
Convergence should be performed each time the tv is moved and at least once annually.

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Here are some of the most common problems with these sets...

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Yours may have one or more of the following symptoms
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bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

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Your set may have one or more of the following symptoms....

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