AUSTRALIAN MONITOR KA1200, Руководство по эксплуатации

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7. Maintenance
Your KA800/KA1200 KA800/KA1200 KA800/KA1200 KA800/KA1200 KA800/KA1200 amplifier will need minimal main-
tenance. 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
KA800/KA1200 KA800/KA1200 KA800/KA1200 KA800/KA1200 KA800/KA1200
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 unit.
The mesh grille in front of the fans will act to limit the
amount of dust and lint entering the unit. 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 unit. 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
Maintenance 17
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.
Fuses
Along with rear panel mains fuse, there is 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, 2 ohm
or bridged 4 ohm loads, these fuses will eventually
fatigue and may require replacing to ensure they do
not fail at an inconvenient time.
NOTE
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 ohmmeter to
check continuity.
Only competent or qualified persons should attempt
any service or maintenance of your amplifier.