Question about Hitachi 57F500 57" Rear Projection HDTV-Ready Television

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The majic focus will not align the blue bulb - Hitachi 57F500 57" Rear Projection HDTV-Ready Television

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The set uses two convergence IC chips--most likely for this model are STK392-150 and if any color will not adjust with magic focus one of them is bad.

There are places that sell kits for this but it does involve soldering etc.

Let me know your skill level and if you need instructions etc I will be happy to advise you.

SD TECH

Posted on Apr 12, 2011

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1 Answer

The blue is blury


This tv have a problems call convergence,it dead.The tv convergence board must have the 2 STK convergence ICS and some or all it resistors are dead.These parts must change to solved covergence problems.The shop will cost u $300-350 for parts and labors.

Jun 12, 2010 | Hitachi 57F500 57" Rear Projection...

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Samsung HCN5529W 55in Rear Projection can't Perfect Focus


hello What you have is a convergence problem. There is 2 modules inside your set that aligns the colors to have the same geometry and superposed . It is a common problem in rear projection tvs ,
You don`t have to worry about your blue tube , i`m sure it is perfectly fine, it just needs to be aligned through the convergence circuit.
Most often the problem is with those convergence modules that are faulty and need to be replaced.
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1 Answer

Won't do HD, red for majic focus does not shift.


you need to replace both STK392-120 Convergence Ics. You can get replacement Ics at the following link and they provide free installation instructions so you can do the repair your self. Heres the link
http://servicemanuals.vstore.ca/

Jan 19, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Replaced IC'S and all resistors and focus problem still


Hello yorty,

You are the first person I have ever had to give this advice to. Let me explain, some folks "get lucky" and the replacement of the IC's and the simple alignment are usually enough, but in your case you have landed in the magical land of complete convergence adjustment.

You are going to have to perform a static and dynamic convergence alignment of your TV. in theory its very simple. here are the instructions:

First, you will have to adjust purity of the three CRTs (follow the instructions in your users guide or the schematic of your TV)

Second, you will need to set the static convergence of your TV (This will set the center of your tv and some of the side, top and bottom, lines)

Third, Once the static convergence is done you will need to set the dynamic convergence of your tv this will set the lines of the extreme top bottom and sides of your tv.

FOLLOW THE INSTRUCTIONS IN YOUR OWNERS MANUAL OR THE SCHEMATIC FOR THIS TV!!

Now for the bad news,

These three actions are all intertwined, That means that once you adjust one, you will have to readjust the others to match. Now this means that on an average, you will spend the next 8 - 16 hours doing the adjustment (8-16 hours are the estimated times for a TV technician to perform this task).

Now, I would suggest getting a TV technician to do the alignment becuase the task is very very tedious, and even most TV technicians hate doing it. I wish you well.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

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1 Answer

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Undue the calibration! It sounds like the dynamic contrast is up too high.

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After warming up, try Magic Focus

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Yes it certainly sounds like you have the old convergence outpuyt IC's that have gone bad in this TV set. If you have the soldering skills, and know how to work on printed circuit boards, you can repolace both of the STK convergence IC's. If you do not, you can get the complete convergence board at http://www.ptscorp.com, and the Hitachi board number is JT22056. Good Luck

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