My Samsung HCL4715w rear projection had a convergence problem. I replace the SUB PCB. Convergence problem fixed.
However, Red CRT is very dim. I tried the screen adjustments directly on the CRT, but no response. Same for Blue and Green (think they work in series).
Any cheap fixes or ideas? Definitely not putting a new Red CRT on - set is not worth it. But I would love to tinker and get this set fixed, just for the satisfaction of completion.
I am not electric technical, but if I can do surgery on humans, I should be able to do surgery on a television.
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As long as you can solder you should be okay, however i would suggest getting your ICs at the following link because they provide free instalation instructions with pictures on how to remove and replace the Convergence ICs. heres the link. http://servicemanuals.vstore.ca/
The Convergence ICs will need to be replaced , 95% of the time thats the problem they are on the sub board not the convergence board. You will need two STK392-040 ICs . you can get replacements at the following link and they will provide free installation instructions along with free on-line tech support when you install them. takes about 45 minutes. Heres the link. http://servicemanuals.vstore.ca/
The convergence board wont correct the problem. You need to replace the two Convergence ICs on the sub board STK392-040 and you will be back to normal. See my response above. That site will help you get it back to normal.
Yes I did. You will need to get a service manual for this TV set to trace the voltage coming from the sweep power supply. If this is a problem that is new after you replaced the convergenbce4 board, you for sure have a broken wire or connection somewhere in the set. Have seen this happen may many times after a novice repairs a TV set. Good Luck