I think you have a week picture tube. There is too much on the red gun, or the blue and green guns are too week. Adjusting is possible inside, try locate the r,g,b pots, normally on the panel on the tube, or near the tube wires. Sorry, i dont know this modell, i tell this generell TV/Monitor experience. Adjusting takes time, and DANGEROUS. Consult with technicians. DONT FORGET THE HIGH VOLTAGE INSIDE, WITCH EASELY KILL YOU !!!
