Question about Televison & Video
Tried to adjust convergence, tv won't allow, tv does nothing, I believe its the chip, read if I saudered it, it may help fix the problem, do you have any suggestions or no what I can do without having a costly bill?
Your symptoms sounds like at least one damaged convergence IC.
You are correct you can sometimes rework the solder connections on each of these IC’s, although, if the convergence does not fix itself from time to time, you most likely do not have a bad solder connection. You will have a faulty IC. I recommend to replace them both at the same time because the chips legs can fall off due to the heat of the IC.
Please be sure to remove all of the white heat sink compound on the heat sink and apply a even coating over the back of the new IC’s. You should also bolt them down before you solder them in so that you have them at the correct height.
There are two and sometimes three very large IC’s that control the convergence in a big screen set. I believe that your set has two. They are secured to a very large aluminum heat sink. I think that the IC numbers will be IC8001, 80002.
The IC’s are large and black, you cannot miss them. They will usually have an STK-XXX number on them.
There are several schools of thought on the replacement of parts and I firmly believe that you get what you pay for, so don’t buy the cheapest IC’s that you can find. One company I worked for tried this and it only caused more work for the technicians, as we had to replace them with the more expensive ones in the end. I would think that you should be able to find these for around $60.00 each. If you can find the exact Mitsubishi part, even though the numbers on the front are the same, and they look exactly like the $10,00 ones, they are better and more reliable.
I hope this information allows you to resolve this issue.
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Posted on Jul 03, 2009
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Posted on Jan 02, 2017
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