Specifications
Maintenance
I7
7
.
Maintenance
Y our PAau/h4tzm
ampl ifi er
wi ll need
minimat
main-
tenance.
No intemal
adjustments
need
to
be made
to
the
unit to
maintain
optimum
performance.
To
provide
years
of unhindered
operation
we suggest
a
maintenance
inspection
be canied
outon
a regular
basis,
say every
12
months or
so.
Fan
s
Due to
the
openness
of
the
air
path
through
your
PiwlPrhzu
amplifier,
very litfle
dust
should
setfle
within
the
amplifier.
The
unit has been
designed
so
that
any dust
and/or foreign
particles
that
do
setfle
within
the amplifierwill
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.
Overtime,
dust
may
build
up
on the leading
edge
of
the
fan
blades
and reduce
their cooling
efficiency.
The time
taken
forthis
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
holdthefan
rotorstillandwipethe
dust off
the blades.
Many
uses
stall the fan and
use compressed
air to
blowthe
dust off the fan
blades. lt is
important
to note
thatthefan
blades must be held
stillwhilstblowing
air
over
the
blades othenrrise
you
may
burn
out the
bearings
in
the fan.
Fuses
Alongwith
rearpanel
mainsfuse,
there
isfour(4)
rail
fuses
provided
internally
in the
unit.
These railfuses
are
in
series with
the
positive
and
negative
output
supply
to each
amplifier channel
and
provide
overall
protection
for
the output
stage.
lf 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 replacethefuse
if
theelement
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
qualifi
ed
persons
should
attempt
any
service or maintenance
of
your
amplifier.
Arsbdhn
I'tonitor
lfu