Master audio PRO Serie Manual Del Usuario página 54

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Master Audio
5. TROUBLESHOOTING
No power
 Make sure that the cabinet is plug in.
 The Fuse is blown. Replace the fuse on fuse holder with one of the same type. If it
blows again, take the unit to a service centre.
No sound
 Check that the mixer or sound source is sending signal to the unit.
 Make sure that the VOLUME potentiometer is well-positioned.
 Check that the cable from the sound source to the units is connected correctly.
Replace the cable if defective.
 Make sure the output volume (gain) control on the mixing console is turned up
sufficiently to drive the inputs of the speakers.
 Make sure the mixer does not have a Mute on.
Distorted sound
 The system is overloaded and has reached maximum power. Turn down the mixer's
output or the channel's gain.
Poor bass performance
 Check the polarity of the connections between the mixer and the cabinets. You may
have the positive and negative connections reversed at one end of the cable, causing
a loudspeaker to be out-of-phase.
Noise and Hum
 Make sure all connections to the active unit are in good conditions.
 Avoid the signal cables to be routed near AC cables, power transformers, or EMI-
inducing devices.
 Check if there is any light dimmer on the same AC circuit as the cabinet. Connect
the sound system to a different phase than the lights
PRO Series.Version 1.5
Nov10
54

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