Connecting a playback device
You can connect turntables, tuners, Blu-ray disc players, network audio players and CD players to this unit. Use the cartridge selector knob on the front panel to set the phono equalizer on this unit according to the type of turntable cartridge to be connected. link
If you set this unit’s input source to “PHONO” and you accidentally increase the volume without having a turntable connected, you may hear a hum noise from the speakers.
The earth terminal (SIGNAL GND) of this unit is not for safety grounding purposes. If this terminal is connected when there is a lot of noise, the noise can be reduced. Note that depending on the turntable, connecting the ground line may have the reverse effect of increasing noise. In this case, it is not necessary to connect the ground line.
The PHONO input terminals are equipped with a short pin-plug. Remove this plug to connect a record player. Store the removed short pin-plug in a safe place so as not to lose it.