There are three possible causes.

1.Set the [FADER START (CH-2 or CH-3)] button on the control panel to [ON].

2. Is the DJ player properly connected to the [CONTROL] terminal? Properly connect the DJ player to the [CONTROL] terminal using a control cable. For details, see “Connecting input terminals” in the operating instructions.

3. Are the audio cables properly connected? Connect the DJM-750’s audio input terminals to the DJ player’s audio output terminals using audio cables. For details, see “Connecting input terminals” in the operating instructions.