Master audio PRO SERIE Manual De Usuario página 26

Amate Electroacústica,s.l.
6. TROUBLESHOOTING
No power
• Check the device is connected to mains
• Check mains cable is in good condition.
• The thermal fuse may be activated. The replacement of this fuse must be carried
out by specialized personnel as it is an internal component of the amplifier module.
No sound
• Check with the indicators that the signal is being sent from the mixer.
• Check that the signal cables are in good condition and connected at both ends
• The mixer output level must not be at minimum.
• Check that the mixer in not in Mute mode.
Distorted output signal
• The system is being saturated with a very high input signal, frequently caused by
the same mixer. Check the output level or mixer gain channels.
Poor bass levels
• Check the polarity on the signal connections between the mixer and cabinets. If any
of the Pins (1, 2 or 3) have been inverted at the cable ends, this will cause significant
performance and sound quality loss.
Noise and Hum
• Check that all the connections to the active units are in good condition.
• Avoid intertwining between mains supply cables or proximity to transformers or
Electromagnetic (EMI) emitting devices.
• Check there is no light intensity regulator in the same AC circuit as the unit.
ALWAYS connect the sound and light circuits in different phases.
PA208A.Ver 1.0 May 09
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