1. The exclusive driver software must be installed before using this unit. For details, see "Installing the driver software" in the operating instructions.

2. This unit and the computer must be properly connected. For details, see "Connecting this unit with a computer" in the operating instructions. If there is still a problem with the connections, quit the DJ application, unplug the USB cable, then plug the cable back in and relaunch the DJ software.

3. This symptom could happen if you have connected this unit with a Windows computer by USB cable before installing the driver software. The problem can be solved by reinstalling the driver software using the procedure below.

　　1. Connect this unit and the computer by USB cable.

　　2. Delete "PIONEER DJM-900SRT" from [Sound Devices] in [Device Manager].

　　3. Disconnect the USB cable connecting the computer to this unit from the computer.

　　4. Install the driver software.

　　* This unit and the exclusive driver software only support Hi-Speed USB.

　　Check that your computer, USB port and USB cable support Hi-Speed USB.