PAG E 1 0
M A I N T E N A N C E
Only competent qualified persons should attempt any
service or maintenance of your amplifier. Your IS
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.
NOTE: The following instructions are intended for
action by qualified personnel only.
FA N S
Due to the openness of the air path through your IS 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 that in time there will be a build up
of dust and lint on the grille which may 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.
F U S E S
Along with a rear panel mains fuse, there are four (4) internal rail fuses
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, 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 ohm meter to check continuity.
I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N UA L