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Troubleshooting
Problem: 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 the System section on page 3). If the AC
mains voltage is higher than your monitor’s selected voltage it is possible that the fuse
needs to be replaced. (See Changing Fuses in the Connecting the System section on
page 3).
• The KRK logo on the front panel will be illuminated when the monitor is on. If logo is not
illuminated, turn the powe 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.
•If a fuse change was needed and upon powering the monitor back up the fuse(s)
blow(s) again, the monitor needs to be returned to the dealer you purchased it from
or to KRK for servicing.
Problem: If you can't hear any sound...
• Repeat steps in the previous 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 monitor input.
• The System Gain pot is turned up fully clockwise (+ 6 dB).
• 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 monitors is working. Exchange the audio input cable from the non-
working monitor to the working unit. This will determine whether it's really the
monitor, a faulty cable, or some other glitch in the audio chain.
• If the monitor is still not responding, it should be returned to the dealer that you
purchased it from or to KRK for servicing.
Problem: If the monitor suddenly stops working...
• Turn the monitor down or off.
• Repeat 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 monitor has been
running at it’s highest power output for an extended period of time, it could be that
the unit has become overheated and the protection circuitry has shut the system
down momentarily. Your KRK monitor provides maximum circuitry protection against AC
power surges, amplifier overdrive, and overheating of the amplifiers. Turn the monitor 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 monitor 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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