XDJ XZ + PLX 500 : level output of the turntable too low

Hello, I recently bought a new XDJ XZ and a PLX 500K. I've connected the PLX in Phono directly on the channel 3 of the XDJ XZ. I ve selected in the Menu Phono for channel 3 so everything is connected correctly. Still the level output of the turntable is way lower than the level of channel 1 and 2 (USB keys) and the Trym is on the same position for every channel. Can someone explain me ? Thank you