ASHLY MX-508 [9/12] Operating manual mx 508 stereo microphone line mixer

Operating Manual - MX-508 Stereo Microphone/Line Mixer

8.TROUBLESHOOTINGTIPS

81 No Sound

Check the AC power Is the power switch LED on and illuminated? Check the level meters If they are operating, either

the problem is between the mixer and the later components in the system, or else the Output Mute switches are pressed If there

is no meter activity, check to see you really have an input signal and that it is on the desired channel, or check to see that the

meter select switch is set to Left/Right Check that you have the master gain controls at the desired operating level and that the

output mute switches are out

82 Distorted Sound

Something is being overdriven in the signal path If the clip indicators are active, reduce the channel gain controls and/

or press in the pad switch on the rear panel If the level meters are constantly in the red, reduce the Master gain and increase

the gain of components following the mixer There are many gain adjustments in the mixer itself and probably several others

in other system components which makes it possible to overdrive an input section and then incorrectly try to reduce the gain of

the output section The best way to approach setting gains is to establish the operating level of input stages first by setting their

gain as high as possible but leaving about 20dB of headroom for loud peaks, then move on to set the master gain to produce a

good meter reading Proceed to set the gain of equalizers, limiters, crossovers, and amplifiers following the mixer in the same

manner, always working toward the later stages of the system

83 Excessive Noise

If the noise is in the form of hiss, the problem is usually due to an input stage set up for low gain and then compensating

by increasing the master gain Check that the Pad switch is not enabled unnecessarily Turn up the channel gain controls and

reduce the master gain

84 Excessive hum

This is usually caused by "ground loops" in the system wiring A complex sound system with many sources separated

by significant distance and using several power outlets has many opportunities for this problem to occur If possible, feed

everything in the system from one power source with a common ground Use balanced input and output connections between

widely separated components

If you need help, get in touch with your Ashly dealer or call an Ashly technical service representative at 1-800-828-6308