Hello Icaillo, I have been reading through the 30+ pages about convergence problem with RPTV for about a week now and I could not find similar situation with my 1996 RCA P60756BA. It seems like a convergence problem but with a slight difference so I hope you can help me out.
First let me introduce myself, I have been playing with electronics since the 50's beginning with tube radio but sort of stop when transistors came about. I have also worked in a TV repair shop back then repaing many tube TV's. Nothing like what we had today. In the recent 20 years, I have fixed some but also damaged some too, but I am OK with soldering, replacing parts, fixing traces, etc. My other RCA 46" bought a few years before the P60 is still working like new because I had fixed the High voltage leakage near one of the CRT.
About 4 years ago, I took the time (3+ hours) to re-adjust the convergence throught the service menu and the controls on the congvergence gen board. I did a perfect job as everyone said this RCA show a better SD picture than my new Toshiba 72" DLP.
About a month ago, while the wife was watching her show, the TV suddendly streched the picture by about 20% diagonally on all 4 corners. the center portion of the screen seems unaffected. Where the corners stretches, the convergence are not good, the red green blue lines separated by about an inch. This lead me to believe something common to all 3 convergence amp.
While carefully remove the entire chassis from the cabinet, I did not see anything obvious to cause the problem - like burned resistors, discolored area, cracked traces etc. This TV does not have what was described in your thread (STK's) but instead there is a board (convergence amp) with 6 large heat sink and each heat sink has 4 large transistors mounted. There's a power supply board on the side supplying power to the convergence amp which output to the convergence generator board (where all the service adjustments are).
I am not sure if this picture streaching on all 4 corners have anything to do with convergence either. I am wondering if you have ever run into such problem with this model? Yes it is an older TV and not even HD but when working, everyone said it got some of the greatest picutre they've seen, I sure hate to throw this TV away. Please help if you can, Much thanks, max
PS: TV came with component diagrams, parts list etc. but all in a sheet of paper with tiny print that is very hard to read.
First let me introduce myself, I have been playing with electronics since the 50's beginning with tube radio but sort of stop when transistors came about. I have also worked in a TV repair shop back then repaing many tube TV's. Nothing like what we had today. In the recent 20 years, I have fixed some but also damaged some too, but I am OK with soldering, replacing parts, fixing traces, etc. My other RCA 46" bought a few years before the P60 is still working like new because I had fixed the High voltage leakage near one of the CRT.
About 4 years ago, I took the time (3+ hours) to re-adjust the convergence throught the service menu and the controls on the congvergence gen board. I did a perfect job as everyone said this RCA show a better SD picture than my new Toshiba 72" DLP.
About a month ago, while the wife was watching her show, the TV suddendly streched the picture by about 20% diagonally on all 4 corners. the center portion of the screen seems unaffected. Where the corners stretches, the convergence are not good, the red green blue lines separated by about an inch. This lead me to believe something common to all 3 convergence amp.
While carefully remove the entire chassis from the cabinet, I did not see anything obvious to cause the problem - like burned resistors, discolored area, cracked traces etc. This TV does not have what was described in your thread (STK's) but instead there is a board (convergence amp) with 6 large heat sink and each heat sink has 4 large transistors mounted. There's a power supply board on the side supplying power to the convergence amp which output to the convergence generator board (where all the service adjustments are).
I am not sure if this picture streaching on all 4 corners have anything to do with convergence either. I am wondering if you have ever run into such problem with this model? Yes it is an older TV and not even HD but when working, everyone said it got some of the greatest picutre they've seen, I sure hate to throw this TV away. Please help if you can, Much thanks, max
PS: TV came with component diagrams, parts list etc. but all in a sheet of paper with tiny print that is very hard to read.
