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Ic question convergence question. Can i replace the 110 with 150? If so do I need upgrade of resistors

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Hi Dan, Yes replacing both as I can only assume I will be doing this again soon if I do not. Anyway old STK's were 110 series. Any further advice as I plunge into the unknown? Thanks, Scott

Posted on Mar 19, 2008

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No change in resistors is necessary. The -150 can handle more power but will only handle that which is presented. I'm assuming that you are talking about the convergence STKs.
Dan

Posted on Mar 19, 2008

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I got an AV-48WP74 projection tv and the convergence IC's werre upgraded from STK392-110 to STK392-150 and several of the resistors on the convergence board were bad. I need to know what to upgrade the...


The value of the resistors should not be changed (either resistance or wattage) as their job is to self destruct if one of the chips shorts.

It is very unusual in this set to see more than two of the resistors bad.

FYI: the 150 chip is a higher current device but will have no longer life than the original as the problem is that the heat sink grease drys out and this causes the failure.


The original resistors are metal oxide type and flameproof or carbon resistors should not be used to replace them.

Let me know if you have questions.


SD TECH

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1 Answer

I have red convergance problem.. This is the second time I have replaced all diodes and the stk chips. they dont have any 110 stk chips so i am using 150 stk chips. I replaced all diods and now RK 62...


Alot of techs recommend using the higher wattage ICs to replace the stock ones, which is never a good idea since the resistors get stressed. Upgrading to the STK394-160 IC is the only upgrade Hitachi recommends but then the values of the resistors need to be changed since the stock resistors will not work with the upgraded ICs

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1 Answer

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U know how to use a multimeter right?Check and replaced all the resistors near the 2 convergence ICS.Most resistors are big and blue core in colors.

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1 Answer

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Panasonics will usually need the 2.2 ohm 2watt resistors replaced with the ICs , as usually at least one will blow possibly two when the ICs fail. If you didnt replace the resistors you will also most likely need to replace the ICs again as a bad resistor will ruin new ICs usually

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1 Answer

Hitachi 43uwx10b. How do i test resistors for convergence? i replaced i/c chips with upgraded stk394-160 and all resistors i was told rk42=3.3ohm/ rk46=1.8ohm/ rk50=2.7ohm/ rk54=1.5ohm/ rk58=3.9ohm/ and...


You have all the resistor are correct! Yes I can Tell you exactly what you need to know and How to Save settings after you adjust convergence, I have to pull out my manual on your hand unit Be right back. first you need to go to front of TV remove front bottom panel to where you can see the front of chassis on the board you replaced ICs there is a small blue contact button with TV on press and hold for 5secs Convergence Pattern should appear! You will need your hand unit to begin to adjust convergences.

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Hitachi 43FDX Rear Projection TV


Yes, You will need to replace the 2 convergence IC's. Hitachi part # CZ01341. Generic part # STK394-160E These are the upgraded replacement parts. Also look for any burnt resistors near these IC's.

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2 Answers

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If you cannot align, the ICs probably need to be replaced. You can check the input on feedback resistors in front of the ICs with an ohm meter. Some resistors may be bad causing your problem. Usually you would need to replace the ICs and bad resistors and do a full re-alignment to fix.

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1 Answer

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those are the convergence feed resistors. # blinks on a panasonic means convergence IC failure. You will need to replace the two stk392-110 convergence ICs and the six resistors. You can get replacement ICs and resistors at the following link.
http://servicemanuals.vstore.ca/

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1 Answer

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alot of people make the mistake of putting two STK392-150 Ics in the Hitachi , and most times it will not work unless you change all the convergence resistors.. If youre going to upgrade hitachi to anything other than the stock ICs, it is recomended by Hitachi to use the STK394-160 ICs but then you have to change the ratings on the resistors. You can get the upgrade kit for your hitachi at the following link.
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4 Answers

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The fact that you used the term "magic focus" tells me you have a Hitachi projection set. When the colors no longer line up on a Hitachi projection TV, it means that most likely one of the convergence output IC's has shorted out. Sometimes a shorted convergence output IC will burn up a low value resistor too. I have also seen a convergence IC crack loose from the board and burn up 3 low-value resistors. If your set is using the STK392-110 IC's, it is probably a good idea to go ahead and replace both IC's with the newer upgraded STK392-150 IC's. The output IC's should be resoldered / replaced and the circuits checked and realigned by a qualified tech familiar with Hitachi projection sets.

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