AUSTRALIAN MONITOR AM1600 Manual del usuario - Página 5
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Ihermcd lndicotion
The only indicator not duplicated is the
THERMAL LED. This LED
is found
in
the centre
of
the amplifier
(aboue
the
POWER
switch).
When switching the
amplifier
on,
the light
will
flash red indicating correct operation
of
the Mains In-
Rush Suppression circuit. This
light will not illuminate in normal
use.
This LED
will
glow Red when the amplifier has shutdown due to excessive heat
build up
-
in this situation all indicators will extinguish
and only the fans remain
operational
on
the
unit.
The
unit will
then automatically restart when the
internal temperatures return
to a
safe
operating level.
PowerOn lndicolion
(Refer
to
Dingram
aboue)
The LEDs closest to the mains switch glow Green when on. The
first
indicates the
amplifier
is
oN. (It
actually indicates the
15
volt
preamp supply is present
-
the
left hand
side
display
shows
-15v, and the right hand side
shows
the
+lbv).
The next LED outwards is also a supply indicator and also shows power on.
(It
indicates
that the
Positive High Tension Power Supply to the output stage is
present - on the corresponding channel).
level lndicotion
Each channel features
a
variable
10
segment
display showing actual power level
before clipping, (taking mains supply and load into account).
The display is colour coded, and calibrated
in
3dB increments.
As
seen
in the
diagram, the
first
of these
is the -2?dB
T.FID,
and
this
is the only
one
not labelled
on
the unit. The
10
LEDs are
;
Green, -27d8 to -21d8;
Yellow, -18d8 to -6dB; Red, -3d8, and two CLIP LEDs.
Fqull
lndicolion
A
FAIILT
LED is located
above
each
ATTENUATOR. This LED
will light
orange
in the
event of a short
circuit
on
the amplifre/s Output or speaker lines. The
same
LED
will light
orange when the Rear Panel Negative RAIL
F{.ISE
of
the
conesponding channel has failed. (Both these conditions require signal).
Olher Foull lndicqtions
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When
a
Rear Panel Positive
RAIL
FUSE has failed, the entire level meter
for that particular channel
will light
up, and the High rension Green LED
will
extinguish (this is thz
second Green
LED in frcm
the
powE?
switch).
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If
the Output load is to low in impedance, or the output is driven into heavy
clipping, then the FAULT LED
will
glow dimly
with
the signal.
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If
the
THERMAL LED remains
on
after
turn
on,
and/or pulsates
brightly
with
applied signal, you must switch the
amplifier
OFF immediately! The
amplifier
Slow
Start Cireuitry
needs
servicing.
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AC Mains Supply
U
is the same Voltage
as
written
on
the amplifrer back panel.
?
is
adequate
for the
amplifier
(recommended
at
15
amp 220/240 volt, 25 amp 110/120 volts).
3/
Earth is always
connected.
Amplifier
is kept away from water or moisture.
The amplifier Outputs are not plugged back into its Inputs.
The signal
source
of
the amplifier
Iniuts
should
come
from the
same
Earth
point
as
the amplifier.
The
amplifier
should
be
the I"AST item in
a
system to be turned ON,
and the FIR.ST to
be
turned OFF.
When replacing the Supply
RAIL FttSEs,
use
correctly rated
fuses.
ATIENUATORs
are set at -10d8 or above,
forfull
amplifier Output.
The Red
CLIP
LEDs are not on continuously,
as
this will greatly
reduce speaker life.
tu
A.dil,S.
Page
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