Troubleshooting
If you’re having trouble, check out these tips...
If there is no power, check to see if...
• The power cord is plugged into both the IEC socket on the rear panel of the unit and into the AC mains.
• The AC mains voltage is matched to the operating voltage requirements (see Changing Voltage in the Connecting Your System section on page 6). If the AC mains voltage is higher than the selected voltage, it is possible that the fuse needs to be replaced (seeChangingFuses in theConnectingYourSystemsection on page 6).
• The power light is illuminated on the front panel of the monitor or on the back panel of the subwoofer. Note that with the the new RoKit series (Generation 2) or the VXT series, the logo illuminates on the front panel to indicate that power is on. If the power indicator is not on, turn the power switch off and check the A/C mains fuse(s). NEVER USE A LARGER AMPERAGE FUSE THAN IS SPECIFIED! Turn the power switch back on. The power light should illuminate.
• Note: If a fuse change was needed (and the AV mains voltage is set correctly)
yet upon powering the unit back up the fuse(s) blow again, the product needs to be returned to the dealer you purchased it from, or to KRK, for servicing.
If you can’t hear any sound...
• Repeat the steps in the Troubleshooting section above before continuing to the next steps.
• Check to see if all other audio devices using the same AC outlet are still operating.
• Make sure that:
• The audio source cable is plugged into both the source output and the unit’s input.
• The System Gain pot is turned up fully clockwise (+6dB).
• The signal source (e.g. mixing console, work station, CD player, etc.) is turned up to a level that can properly send a signal to the monitors.
• If one of the full range monitors is working then exchange the audio input cable from the
• If the unit is still not responding, it should be returned to the dealer that you purchased it from, or to KRK, for servicing.
If the monitor suddenly stops working...
• Turn the unit’s send down or off.
• Repeat the steps in the Troubleshooting sections above before continuing to the next steps.
• Carefully check to see if the amplifier's back plate is hot! If the unit has been running at highest power output for an extended period of time, it could be that it has become over heated and the protection circuitry has shut the system down momentarily. The unit provides maximum circuitry protection against AC power surges, amplifier overdrive, and overheating of the amplifiers. Turn the unit off then wait 30 minutes to allow the back plate to cool down. Turn the power switch back on.
• Increase the volume to check for normal operation.
• If the unit is still not responding, it should be returned to the dealer that you purchased it from, or to KRK, for servicing.
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