Troubleshooting Tips - Intelix 4001 VC User Manual

Intelix VC Series Mic/Line Mixer User Manual

11.0 Troubleshooting Tips

NO POWER
Check the connections between the mixer and the power supply and the external
AC power supply.
Check the wall outlet.
NO SOUND
Make sure the mic/line switch is in the proper position. (This is the most likely
cause.)
Make sure both the master and channel input controls are turned up.
Check that the source signal cable(s) is properly connected and undamaged.
Adjust trim/gain potentiometer(s) to increase gain.
If there is still no sound, try changing input source(s) to different channel(s).
Verify jumper J1 is in place if not using patching.
DISTORTED SOUND
Turn down the master volume control. If distortion persists, input channel(s) is
likely cause.
Check position of all line/mic switches.
Determine the distorting input channel(s) by checking them one at a time.
Decrease gain of input channel(s) causing distortion. (By turning the gain/trim
control potentiometer on the rear panel.).
EXCESSIVE HISS or HUM
Hiss: Make sure the volume control knobs for all the unused channels are set at "0"
and in line position. Make sure the mic/line switch is in the correct position for both
the input and output.
Hum: Mics lines can easily cause hum. Make sure to locate them away from vibration
and magnetic field sources (motors, power supplies and lines, and data lines).
Check mic lines, especially the shield, for damage.
Another common source of hum is a ground loop, which can result from connecting
two or more powered devices together. Turn the master volume down. If the hum is
still present, the ground loop or other cause is not in the mixer, but in the connections
or devices after the mixer in the audio path.
If the hum is "in" the mixer, first check to see if the Ground Lift Jumper (J4) is
present. It should be removed, unless the mixer is in a nonmetal cabinet. Check for
unbalanced connections; use balanced connections, if possible. For all unbalanced
connections, try to disconnect the signal line ground to "lift" the ground.
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