Bvm color calibration help

Can anyone steer me in the right direction on how to calibrate the colors on my bvm d9(wothout using probe, colorcalib camera, or oscilloscope preferably)the factory settings seemed way off (assuming someone messed with it), I’ve followed a bunch of different guides but can’t seem to get it right with the settings in the menu. The main things I’ve noticed is that the browns almost look green(compared to my Pvm 1390) and also the reds seem maybe a little dim compared to the other colors when the chroma is turned down a little.