Alesis 500 Manual De Referencia

In Case of Trouble

16

Matica 500/900 Reference Manual

¥Is the power switch on? If not, turn it on.

¥Is the power light on? If not, confirm that the amplifier

is plugged into a live AC mains circuit of appropriate

voltage and current capacity.

¥Check the circuit breaker and reset it if it is open. If the

breaker opens immediately, there may be a short

circuit across the output terminals; if not, there is a

possible internal fault in the amplifier which will

require service by a qualified technician.

¥Is the amplifier input connected to a live signal source?

Is the loudspeaker solidly connected to the amplifier

output at both ends of the speaker cable? Is the

speaker faulty?

¥Is the amplifier very hot? Is the ambient temperature

and/or the air flow in the rack abnormal? If so, the

amplifier may be in thermal protect mode; normal

operation will resume when its internal temperature

has dropped to reliable levels.

¥Is the signal source working correctly?

¥Is the wiring to the amplifier input properly connected

at both ends?

¥Have the gain controls of the signal source or the

amplifier been moved since the system was set up?