Is the power cord properly connected? Connect the power cord to the power outlet.

The circuitry generating the [ECHO], [SPIRAL], [REVERB], [MELODIC], [ROLL], [SLIP ROLL] and [REV ROLL] echoes is positioned after the effect circuitry, so the effect sounds cannot be monitored. This post-effect design is meant to ensure natural reverberations when the sound is cut with the channel fader.
This is not a malfunction.

Are the CROSS FADER ASSIGN (A, THRU, B) selector switches properly set? Set the [CROSS FADER ASSIGN (A, THRU, B)] selector switches for the respective channels properly.

There are five possible causes.

1. Is [FADER START] set to [OFF]? Set [FADER START] on the [USER SETUP] screen to [ON]. For details, see "Setting preferences" in the operating instructions.
2. The CDJ-2000 or CDJ-900 must support the LINK function. Check that the CDJ is version 4.00 or higher.
3. Is the DJ player properly connected to the [LINK] terminal? Connect the DJ player to the [LINK] terminal properly using a LAN cable. For details see "Connecting input terminals" in the operating instructions.
4. Are the audio cables properly connected? Connect this unit'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.
5. Are the DJ players' player numbers properly set? Set the DJ players' player numbers to the same numbers as the channels to which the audio cables are connected.For details, see the respective player's operating instructions.

Is the [1, 2, 3, 4, MIC, CF.A, CF.B, MASTER] selector switch properly set? Turn the [1, 2, 3, 4, MIC, CF.A, CF.B, MASTER] selector switch and set it to the channel to which you want to apply the effect.

Is the [COLOR] control set to an appropriate position?
Turn the [COLOR] control clockwise or counterclockwise.

There are two possible causes.

1. Is the [BEAT EFFECTS] – [ON/OFF] button set to [ON]? Press the [BEAT EFFECTS] – [ON/OFF] button and set [SND/RTN] to [ON].
2. Is the external effecter properly connected to the [SEND] and [RETURN] terminals? Connect the external effecter to the [SEND] and [RETURN] terminals. For details, see "Connecting input terminals" in the operating instructions.

Is the external effecter's audio output level set appropriately? Adjust the external effecter's audio output level.

There are three possible causes.

1. If the audio input level is too high or too low, it may not be possible to accurately measure the BPM value. Adjust the [TRIM] control so that the channel level indicator lights up to about [0 dB] at the input sound's peak level.
2. Depending on the track, it may not be possible to accurately measure the BPM value. In this case, use the [TAP] button to input the BPM value manually.
3. If this unit is connected by link to a Pioneer DJ player supporting PRO DJ LINK (CDJ-2000, CDJ-900, etc.), also check the items below.
3-a. Is the DJ player supporting PRO DJ LINK connected to the same input channel as the currently playing device? The BPM value information may be being acquired via link from the DJ player. Either connect the playback device to a different input channel than the DJ player, disconnect the DJ player's link cable (or turn its power off), or use the [TAP] button to input the BPM value manually.
3-b. Is the BPM value displayed on the DJ player's display? If the BPM value cannot be measured on the DJ player, the BPM value cannot be displayed on this unit. In this case, use the [TAP] button to input the BPM value manually.

The values may differ slightly due to different methods used for measuring the BPM. This is not a malfunction.

There are six possible causes.

1. Is the [DIGITAL, CD/LINE, PHONO, LINE, USB */*] selector switch set to the proper position?
Turn the [DIGITAL, CD/LINE, PHONO, LINE, USB */*] selector switch and set it to the channel's input source.
2. Are connection cables properly connected? Connect the connection cables properly. For details, see "Connecting input terminals" and "Connecting output terminals" in the operating instructions.
3. Is [MASTER LEVEL] set to the proper position? Adjust [MASTER LEVEL] so that the master level indicator lights up to the orange indicator at the peak level.
4. Is [TRIM] set to the proper position? Adjust [TRIM] so that the channel level indicator lights up to the orange indicator at the peak level.
5. Are terminals and plugs dirty? Wipe any dirt off terminals and plugs before connecting.
6. Is [MASTER ATT.] set at for example [-6 dB]? Switch [MASTER ATT.] at the [USER SETUP] screen. For details, see "Changing the settings" in the operating instructions.

The talkover function can sometimes be activated erroneously due to the influence of static electricity, etc. If you do not want to use the talkover function, turn it off.

Does the digital sound output's sampling frequency (fs) match the specifications of the connected device? At the [CLUB SETUP] screen, set [Digital Master Output Sampling Rate] according to the specifications of the connected device. For details, see "Changing the settings" in the operating instructions.

There are two possible causes.

1. Is [MASTER LEVEL] set to the proper position? Adjust [MASTER LEVEL] so that the master level indicator lights up to the orange indicator at the peak level.
2. Is [TRIM] set to the proper position? Adjust [TRIM] so that the channel level indicator lights up to the orange indicator at the peak level.

If the sound is distorted even after the input/output level has been adjusted, the level may exceed the power amplifier's maximum allowable input level. Turn the level down to an appropriate level using [MASTER ATT] on the rear panel. The level can be attenuated by 50% at -6 dB, by 70% at -3 dB. This setting does not affect the master level indicator.

There are two possible causes.

1. Is an analog player with an internal phono equalizer connected? When using an analog player with an internal phono equalizer, connect it to the [CD/LINE] or [LINE] terminals. For details, see "Connecting input terminals" in the operating instructions. If the analog player with internal phono equalizer is equipped with a PHONO/LINE selector switch, switch it to PHONO.
2. Is a computer sound card (audio interface) connected between the analog player and this unit? If the computer sound card's output has a line level, connect to the [CD/LINE] or [LINE] terminals. For details, see "Connecting input terminals" in the operating instructions. If the analog player is equipped with a PHONO/LINE selector switch, switch it to PHONO.

There may be a malfunction (except directly after the BEAT EFFECT's [DELAY, ECHO, SPIRAL, REVERB, TRANS, FILTER, FLANGER, PHASER, ROBOT, MELODIC, SLIP ROLL, ROLL, REV ROLL, SND/RTN (MIDI LFO)] selector switch is set to the SND/RTN (MIDI LFO) position, in which case the indicator flashes for about 2 seconds).
Read "Warranty and After-sales Service", then contact your store of purchase.

The displayed values may be slightly different because of different BPM measurement values. No particular countermeasure is necessary.

1. This unit's IP address is assigned automatically by the AutoIP or DHCP function. The computer must also be set so that the IP address is assigned automatically. Some 30 seconds to 1 minute are required from the point LAN recognition starts for the IP address to be set, though this depends on the operating system installed on the computer.
2. In some cases, LINK connections are not possible due to security software used on the computer and the operating system's firewall settings.
rekordbox and the network with LINK connections must be excepted from the security settings. For setting instructions, see the following:
https://rekordbox.com/en/support/faq.php?c=172

The version of the firmware on the CDJ-2000/CDJ-900 used in combination with this unit may not be supported. In this case, update the CDJ to Ver. 4.00 or later. The latest firmware can be acquired at the Pioneer DJ Web support page.

1. In rekordbox, at [File] -> [Environmental Settings] -> [Audio], check [Use Pioneer DJ mixer's "LINK MONITOR" function].
2. rekordbox must support the "LINK MONITOR" function. Update rekordbox to Ver. 1.2.1 or later. The latest version of rekordbox can be acquired at the Pioneer DJ Web site.
https://rekordbox.com/en/store/

1. The dedicated driver software must be installed on the computer beforehand. For details, see "Installing the driver software" in the operating instructions.
2. This unit and the computer must be connected properly. For details, see "Connecting this unit and computer" in the operating instructions.
If the computer can still not be connected properly, quit the DJ application, disconnect the USB cable, then reconnect the USB cable and relaunch the DJ software.
*This unit and the dedicated driver software only support Hi-Speed USB. Check that your computer, the USB port and the USB cable support Hi-Speed USB.

When this unit is connected to a computer (Windows) for the first time or when it is connected to a different USB port on the computer, the message "Installing device driver software" may appear on the computer's screen. Wait awhile as such until the message "Device prepared for use" appears.

-[Connect to Windows Update to search for hardware] may appear during installation. If so, select [No, do not connect now], then click [Next] to continue installation.
-[Select the installation method] may appear during installation. If so, select [Install software automatically (recommended)], then click [Next] to continue installation.
-The [Windows Security] screen may appear during installation. If so, click [Install driver software] to continue installation.

1. To output the sound from the computer to this unit, the dedicated driver software must be installed on the computer beforehand. For details, see "Installing the driver software" in the operating instructions.
2. This unit and the computer must be connected properly. For details, see "Connecting this unit and computer" in the operating instructions.
If the computer can still not be connected properly, quit the DJ application, disconnect the USB cable, then reconnect the USB cable and relaunch the DJ software.
3. The audio data to be output to the computer must be set using the Settings Utility. For details, see "About the setting utility software" in the operating instructions.
4. This unit must be selected in the DJ software's audio output device settings. For detailed instructions on setting, see your DJ software's operating instructions.
5. This unit's [DIGITAL, CD/LINE, PHONO, LINE, USB /] selector switch must be set to the proper position. Set the [DIGITAL, CD/LINE, PHONO, LINE, USB /] selector switch to the [USB /] position.

This unit and the dedicated driver software only support Hi-Speed USB. Check that your computer, the USB port and the USB cable support Hi-Speed USB.

1. Connect the device to be controlled by MIDI signals and this unit using a MIDI cable or USB cable.
2. Set this unit's MIDI switch (ON/OFF (UTILITY) button) to "ON".
3. For other MIDI setting procedures, see the operating instructions of your MIDI device.

This unit operates when the computer restarts from the sleep or standby mode, but your DJ software may not. If not, quit the DJ software, disconnect the USB cable, then reconnect the USB cable and relaunch the DJ software.

At [Control Panel], check that the account type at [User Account] is set to [Computer Administrator]. If not, installation is not possible.

Installation is possible by inputting the administrator's name and password even if the account type is not [Administrator].

There are six possible causes.

1. Sound skipping can be decreased by adjusting the buffer size.
Windows
When using ASIO driver, make the adjustment at the ASIO tab in the setting utility.
When using Direct Sound, make the adjustment from the DJ software.
Mac OS
Make the adjustment from the DJ software.
2. When using a laptop computer, the computer's performance may be intentionally reduced through the power-saving functions. Use the computer not on the battery but with the AC adapter and cancel all power-saving settings. Also cancel the screensaver function.
3. On Windows Vista, Windows 7, disable "Aero" setting if it's been active.
4. The sound may also skip if the CPU usage rate is high. Other applications being used simultaneously (including resident programs) could also affect performance. Check the recommended usage environment for your application.
5. Computer's internal devices or external devices connetced to may caouse sound skipping. In that case, disable all devices not in use.
6. Some application running on the back ground may cause this problem. If so, shut the other application down.
　
*Customers using Native Instruments Traktor 2, please see Native Instrument Support site.

[Windows XP]
http://www.native-instruments.com/en/support/knowledge-base/show/300/windows-xp-tuning-tips-for-audio-processing/
[Windows Vista]
http://www.native-instruments.com/en/support/knowledge-base/show/314/windows-vista-tuning-tips-for-audio-processing/
[Windows 7, 8]
http://www.native-instruments.com/en/support/knowledge-base/show/3671/windows-78-tuning-tips-for-audio-processing/
[Mac OS X]
http://www.native-instruments.com/en/support/knowledge-base/show/901/mac-os-x/

The following conditions must be met to use the QUANTIZE function:

-For the player, use a Pioneer DJ player (CDJ-900/CDJ-2000 version 4.00 or higher) supporting PRO DJ LINK. The latest firmware can be acquired at the Pioneer Web support page.
-Connect this unit and the player directly by LAN cable or via a LAN hub.
-Make sure the player's player number setting matches the channel to which the audio cables are connected on this unit. For instructions on making the player number setting, see your CDJ's operating instructions.
-Analyze the tracks to be played on the CDJ ahead of time with rekordbox.

When the QUANTIZE button is turned on with the above conditions met, effects are applied according to the track's grid information.

The following conditions must be met to use the STATUS INFORMATION function:

-For the player, use a Pioneer DJ player (CDJ-900/CDJ-2000 version 4.00 or higher) supporting PRO DJ LINK.
-Connect this unit and the player directly by LAN cable or via a LAN hub.
-Make sure the player's player number setting matches the channel to which the audio cables are connected on this unit.

In the CLUB SETUP mode, change the Digital Master Out Level (displayed "DOUT LV" on main unit) setting.
To display the [CLUB SETUP] mode settings screen, turn this unit's power off, then press the [POWER] button while pressing the [ON/OFF (UTILITY)] button.

The computer recognizes this unit, but the dedicated driver software is not properly installed. In this case, MIDI signals can be output from this unit to the computer, but the audio input/output (USB sound card) function cannot be used. To input/output audio signals, install the driver software included with this unit. The indicator will stop flashing, remaining lit.

Driver software Ver. 1.0.0 does not support Mac OS X 10.4 or earlier. The latest driver software can be acquired at the Pioneer DJ Web support page.

Change the USB Output Level setting in the Settings Utility.
When Timecode is selected at Mixer Audio Output, however, the USB Output Level value is fixed and does not change.

To use the PRO DJ LINK function, connect only this unit and the CDJ-2000/CDJ-900 by LAN cable, without connecting a hub or a router connected to the Internet.

[Reference]
When the power of this unit and the CDJ-2000/CDJ-900 which support PRO DJ LINK is turned on, the DHCP server is searched for. If the DHCP server is not found, unique IP addresses are assigned using the AutoIP function.
Because of this, if a network using a DCHP server is connected while using PRO DJ LINK in an AutoIP environment with no DHCP server, the IP addresses of the DHCP server network rather than those of the AutoIP environment are assigned, making it impossible for the devices to communicate as they had up to that point.

Is the [OFF, ON, TALK OVER] switch set to [TALK OVER] and a microphone connected to this unit turned on and placed near a speaker?
When the microphone catches the sound of the speaker, the talkover function is activated and the output sound may seem low unexpectedly. Either turn the talkover function or microphone off, or move the microphone away from the speaker.

If audio is not output or you cannot control rekordbox when using Windows, please see here to solve the problems.