SONY KP53V15 is to Brtght

I have a SONY KP53V15 which is to bright,I have the brightness on the TV all the way down.I had a tv tech fix a problem which he did, the picture would get big then go back to normal, there was to much light in the room and I didn't notice until later that night of the bright picture.Does anyone know if there is a Master Bright control on the adjustment board and what number it is?IF not it's going to cost me another house call,Thanks.