The picture is distorted. It appears as the picture is being drawn to the center of the screen.
I sent my D-Board to PTS and had it tested and rebuilt. They did find some problems with it but it didn't seem to fix the problem with the TV. The picture is distorted and appears to be drawn towards the center of the screen.
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Re: The picture is distorted. It appears as the picture...
This is a convergence problem. This can be either bad solder connections at the convergence ICs or defective ICs. If you can solder, you can fix this yourself. Try resoldering the pins on the convergence ICs. If that fails, replace the ICs. These are large black ICs attached to a heatsink.These should be marked STKxxx.
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This is one of the sets with bad HYPER boards. If it clears up after a while this is your trouble;I just checked a site in LA--the only way to get the board is to go to PTS electronics and send them the original board for repair--part alone is over 200 and is soldered in--a lot of these sets are having this problem.
I know I am not giving you good news but I am pretty sure this is what is wrong with your set--seen dozens of them.
if you think I helped you in some way--give me a vote here I do this for free. IF YOU HAVE QUESTIONS OR NEED MORE HELP contact me by responding to this post.
You do have a failure in the convergence circuit of your set. If you are good at soldering you can replace the IC's yourself. They are on the large circuit board on the left side of the set looking from the back, and attached to a large aluminum heat sink. If you don't feel comfortable doing that, I reccomend removing the board and sending it to PTS corp in Indiana. They are pretty reasonable repairing boards, and a lot less than buying a new one.
You need to re-solder the circuit board that contains the STK
convergence modules. They're on the center circuit board attached to an
aluminum heat sink that's about 8" long and 6" tall, about dead center
in the circuit board. You may be able to recreate the problem (hour
glass effect) by gently moving the heat sink (which the modules are
connected to). This gives the hour glass effect on the picture and the
advanced convergence screen. This is an indication that the modules
pins aren't solidly connected (meaning soldered) properly. Remove the
circuit board and clean the old solder off & resolder the modules
pins to the circuit board reconnected the board and then retest by
again pushing on the heat sink. This is a caused by a minimum
effort (a.k.a. minimum cost) solder job, probably done in some 3rd
world sweat shop. The "factory" job was good enough for 3-4 years but
the heat (and these modules do create a lot of heat) and stress created
from repeated use eventually takes it's toll, weakens the pin
connections and our problem occurs. take the appropriate cautions
working around the high voltage of the set & use a non-conduting
piece of wood to push the heat sink when doing tests. Best of
luck, hope ya fix it.
your set has convergence problems i dont have the answer yet ,i do know that convergence broad is not what is causing this! I have one in my shop now with same problem as soon as i find out problem i will post it !!!!!
The T.V. has a problem on the convergence panel Bd. Check each of the resistors near each regulator transistor. You can send the panel to P.T.S. Electronics in Indiana for repair. Call 1-800-844-7871 and they can repair it for you.
The RCA P52960 uses the PTK195 series chassis. There are 2 main boards at the bottom of the set and above the board on the right (when viewed from behind) is the convergence power supply board. This board usually has a big black IC on it, labeled STK730-010 and bolted to a metal heat sink. Chances are, that IC has burned out and stopped working. Replacing that IC should restore your convergence. If you do not have experience replacing IC's in projection sets, allow a qualified tech to handle it for you.
This doesn't sound like a programming issue. I had a very similar problem about 6 months ago and I fixed problem. I had cold solder joint on the video power board. It was the board in the middle. The power supply was to the right. The video board had a driver with a bunch of legs. About 7 solder joint where cold or loose. I solder the board and my mitsu wide screen was fixed. Hope this helps. Andy