AUSTRALIAN MONITOR AMB1200 Посібник з монтажу та експлуатації - Сторінка 10

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MAINTENANCE

Maintenance

Only competent or qualiﬁed persons should attempt any service or maintenance of your ampliﬁer. Your AMB Series ampliﬁer will need minimal maintenance. No internal

adjustments need to be made to the unit to maintain optimum performance. To provide years of unhindered operation we suggest a maintenance inspection be carried out

on a regular basis, say every 12 months or so.

Fans

Due to the openness of the air path through your AMB Series ampliﬁer, very

little dust should settle within the ampliﬁer. The unit has been designed so that

any dust and/or foreign particles that do settle within the ampliﬁer will not

unduly hinder the cooling of the ampliﬁer.

The grille in front of the fans will act to limit the amount of dust and lint

entering the ampliﬁer. You will ﬁnd in time that there will be a build up of dust

and lint on the grille which may start to hinder the airflow through the ampliﬁer.

You should periodically remove the dust and keep the grille clean. Removal of

dust from the rear grille will also aid cooling.

Over time, dust may build up on the leading edge of the fan blades and reduce

their cooling efﬁciency. The time taken for this to happen will depend on the

environment and the amount of use.

The fan blades are accessible once the lids are removed and can be easily

cleaned. You need only hold the fan rotor still and wipe the dust off the blades.

Many users stall the fan and use compressed air to blow the dust off the fan

blades. It is important to note that the fan blades must be held still whilst

blowing air over the blades otherwise you may burn out the bearings in the fan.

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Fuses

There are four (4) rail fuses provided internally in the unit. These rail fuses are

in series with the positive and negative output supply to each ampliﬁer channel

and provide overall protection for the output stage. If the ampliﬁer is subjected

to heavy use such as short circuits, 1 Ohm or bridged 2 Ohm loads, these fuses

will eventually fatigue and may require replacing to ensure they do not fail at an

inconvenient time.

WARNING: Make sure the unit is off and is unplugged from the

mains. Give the main ﬁlter capacitors time to discharge before removing

lids and inspecting the fuses.

You should replace the fuse if the element is sagging or discoloured. Only ever

replace with the same type fuse and current rating.

When checking for a failed fuse, do not rely on visual inspection alone. You

should use an Ohm meter to check continuity

AMB SERIES AUDIO POWER AMPLIFIERS INSTALLATION AND OPERATION MANUAL