Acquired a 57h82, that has a convergence issue.
The picture is ghosted in red and the red convergence cannot be adjusted left to right. Up and down is ok.
I replaced both of the convergence chips, but it made no difference.
I assume as I did the chip replacement and the issue is still exactly the same, I did it ok.
Does anyone have any other ideas... I have heard that some resistors on the board can be a problem, and should be replaced, but which ones and how do I check them?
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Re: 57H82 convergence issue, but not STK IC
There are probably eight to ten resistors sitting behind the heat sincs the Chips mount on. You will need an Ohm Meter the easiest way to check them is just compare them with one another, you will see a pattern then you will see one that is really high or open (infinity) that is the one to change check the coor code on it to be sure you replace it with the right size
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The convergence circuit has failed in the tv. These are the big STK chips on the circuit board. It typically costs $300 to fix at a TV service center. Requires replacement of two STK chips, some resistors, some fuses and then re-alignment of the CRTs within the service menu.
If you have proper soldering tools and can download the service manual, it is possible to do the repair yourself.
If you do not have any electronic background whatsoever, I do not recommend a person to attempt it.
OK, the problem is one of the STK392-110 convergence amps has died. It is rare that both die at the same time, so either vertical or horizontal will go out, but not both. Also look for an open fusable resistor near said IC.
This may be a convergence issue but it is difficult to determine with that description. Watch this video and see if it will help you determine if you have a convergence problem or possible something else.