Peavey AQ 12, Руководство по эксплуатации, Страница: 13 / 20

No Output at All
First, make sure the unit has AC power and is turned ON. Make sure the LED on the power amp module is
illuminated.
If not, make certain the ON/OFF switch (3) is in the ON position and check the IEC power cord connection (2)
by ensuring it is fully engaged and seated. Make certain the AC line cord is plugged into a working AC outlet.
Once assured your unit is getting AC power, check that the AQ™12 is getting a signal. Temporarily disconnect the
cable running to its inputs and connect it to some other device capable of reproducing the signal (i.e., a power
amp and speaker). If this produces a signal, make sure that all Gain controls being used have been turned up to a
satisfactory level (one-third to halfway).
If the AQ™12 has been subjected to direct sunlight or excessive heat, the built-in thermal protection may have
been triggered. If so, turn off the AQ™12 and let it cool for a sufficient amount of time.
If there is still no output, contact your authorized Peavey dealer or the Peavey International Service Center.
Hum or Buzz
If the AQ™12 is producing a hum or buzz, this can be AC outlet related. Try plugging the AQ™12 into a different
AC outlet. Sometimes, if a different
circuit (breaker) is used for the mixer and for the AQ™12, it can cause hum problems. Unless it is not practical, it
is best to use the same wall outlet (breaker) to supply power to both the mixer and the powered speaker.
Ensure that shielded cables have been used to route the signal to the AQ™12’s input. If speaker cables with 1/4”
plugs are used as input cables instead of shielded cables, they will be prone to hum or buzz.
Hum may be ground loop related. It may be helpful to lift the shield ground (Pin #1) on a balanced cable at the
AQ™12 end. Check any input changes carefully by first turning down the level control, before plugging and un-
plugging cables, or lifting the shield ground at the speaker end.
Check to make sure light dimmers are not on the same circuit as the AQ™12, the mixer or any source devices. If
light dimmers are used, then it may be necessary to turn them full ON or full OFF to eliminate or reduce hum.
This is a typical AC wiring/light dimmer interference problem, not a design flaw of the AQ™12.
The third wire (ground plug) on the AC plug should NEVER be removed or broken off, as this is a potential
safety hazard.
Distorted or Fuzzy Sound
First, ensure the mixer (signal source) is not clipping or being overdriven. Make sure the LEVEL control (4) on
the AQ™12 has not been set too low. Check that the input plug is fully seated in the input jack on the rear panel
of the AQ™12. Ensure that a power amp has not been plugged into the input jack of the AQ™12. If an extension
cord is being used to provide the AC power to the unit, insure that it is of sufficient current capacity and that it is
not also being used to supply power to any other device.
The AQ™12 has built-in EQ to smooth and extend the natural response of the speakers. If excessive additional
bass boost or HF boost have been added externally to the PA™112, it could cause premature overload at high SPL.
Reduce the amount of any external (mixer, rack) EQ and see if that clears up the distortion.
Troubleshooting