Unsolved Recalbox & Rgb-pi: black borders on psx emulator

[ryuh88]

Hi everyone. I'm having some problems with recalbox and rgbpi with my crt. Almost all emulators work fine, except psx. In this case, there is a geometry problem, because the image is not centered, and there are black bars on one side of the screen. How can I fix? thank you very much, if you can spare me a few minutes of your time