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Convergence problem has arisen. I need to replace both IC's (stk394-250) & maybe resistors. Need service manual and/or drawing

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There on a seperate pcb , two big black modules, unsrew them ,then unsolder them
replace with , same , the only resistors
that need to be checked are 6 , 2.2 ohms
5 watts. that are often good .

Posted on Jun 30, 2009

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1 Answer

How do you fix the color to a model 43fdx11b hitachi


Hello!you mean: colors out of convergence? nothing you can do about that, unless you replace 2 convergence amplifiers I.C. chips, plus all those burned 1 watt low ohms resistors with exact values, which only could be obtained via service manual or schematics. After resistor is burned, there is no way to read color code properly, due to partial evaporation of pigments. this is a "pro" job. If you try or tried, already to converge those "stubborn" crosses, there is more to do, even after you removed and replaced two 20 pin I.C. chips, soldered dead into sweep module, plus located and replaced resistors with precise values, you need to get your settings back to normal, by going into "factory service mode' or, at least into "convergence alignment" menu and fight with those crosses!Don't forget the white "****"! Otherwise, you will be re-servicing your set all over after 30 days of usage.good luck,Alex.

Feb 01, 2012 | Hitachi Televison & Video

2 Answers

Convergence


After replacing the stks you need to perform convergence adjusment procedure.
If Stk keeps burning out then replace convergence board.

Sep 03, 2008 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Convergence


If you can not adjust the convergence, then you need to change the convergence IC's The number of the IC is on the chip. There maybe one or two IC chips. I think there are about 12 to 15 pins or so, and will be mounted to a heat sink. There maybe surrounding resistors that need to be replaced too. I hope this is helpful.

Nov 13, 2009 | Televison & Video

1 Answer

How do I perform a convergence adjustment on a Sony kp48s70 rear projection tv?


Hi, you picked a real difficult set to do, you`ll need the service manual,the original SONY remote, you may need to change out the ic`s and a few support parts, ie; resistors & chemical fuses which you can get at acme enterprises in orlando, be sure to read the entire convergence section of the service manual before you change any settings, my advice is to pass but gl if you go for it, video-tek

Jun 06, 2009 | Sony KP-48S70 48" Rear Projection...

2 Answers

I cannot adjust the convergence.


You have convergence output failure. The output ICs will need to be replaced and possibly a small component like a resistor or two as well. Expect to pay a service company $350-$450 to resolve this.

michtech

Jan 23, 2009 | Toshiba 55H70 55" Rear Projection...

1 Answer

IC Convergence replacement


you will no doubt need two STK392-560 ICs and quite possibly two 3.5 amp pico fuses, and its a good idea to get two 4.7 ohm 1/2 watt resistors as well. You can get all the parts you need at the following link and they will provide free installation instructions with pictures and free online tech support while you do the actual repair if you need it. Heres the link.
http://servicemanuals.vstore.ca/

Sep 30, 2008 | Sony KP-57WS500 57" Rear Projection...

1 Answer

43UWX10B problem with green


if you have a 2 IC convergence chassis they dont control the green , However if you have the 3 IC chassis the green is controlleed by the third IC these are usually STK4275 or simallar single amp ICs. Which type chassis does your hitachi have? Its possibly related to the digital convergence board if all resistor near the ICs are good. Do you have the service manual? I can post a link where you can get the full service manual if you need one

Mar 29, 2008 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

Convergence problem


Well you need to get into your tv's service menu and service convergence mode. It's different for every tv. It means entering a code on the remote that opens up a secret menu for changing tv settings. Go to servicemanual.net and buy the service manual for your set, you'll be glad you did.

Mar 23, 2008 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

Amps and resistors


The IC is no doubt bad due to powering it up with the solder bridge. may possibly need entire convergence board unless you have the service manual and troubleshoot it.

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