RCA P52939 52" Rear Projection Television Logo

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Posted on Nov 14, 2007
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Pincushin effect when converging

I can converge in the center portion of the screen. But outer portions top, bottom, left and right form a pincushin. The curvature doesn't allow for convergence even though I can move the three colors. Please help

  • 1 more comment 
  • Anonymous Dec 03, 2007

    Picture is warped, in the center vertically it is smaller or concaved and on the ends it's larger like a sidewise hour glass. Like when on a computer, screen pincushion affect. Can this be fixed by adjusting a resistor or like adjusting a computer screen.

  • Anonymous Dec 28, 2008

    My problem is simular, except top & botton is ok,but both left & right bows in exactlly the same amount about 6" Any suggestions? Thanks ,rioconcho

  • Anonymous Jan 08, 2009

    do you have wiring diagram for the p52939?

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  • Posted on Dec 19, 2007
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But there are two
quick things you might be able to do. If it is a PTK195 you can most
likely install the updated power supply board. If you can solder and
know safety (like discharging caps) you can update the PS chip from an
STK730-??? to an STK730-180 (IIRC). I found that simply replacing the
chip with an equivalent fails most of the time. The 180s seem to hold
up.

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