The following steps will allow you to connect the PP400 phono preamp to your home stereo system:

1.  Connect the left and right outputs of your turntable to the left and right inputs of the PP400
2.  If needed, connect the ground of the turntable to the ground of the PP400
3.  Connect the left and right outputs of the PP400 to the left and right audio inputs of your receiver.  Make sure the inputs are NOT labeled "phono".

With this connection the PP400 will amplify the signal from your turntable into the receiver.  The reason for not connecting to the phono inputs of the receiver is that will amplify the signal twice coming in to the receiver which will cause overloading and distortion.