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Infinity Overture 1 - Speaker Care and Troubleshooting

Infinity Overture 1
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YW)
r)
In
A
Service
Bulletin
Service
bulletin
INF9705
-
Nov.
1997
To:
All
Infinity
Service
Centers
Models:
Overture
1;
Overture
2;
Overture
3
Subject:
Unit
cycles
on
&
off
with
no
music
signal
Operation
principle
of
Auto
ON/OFF
circuit:
in
Overture
1,
Overture
2,
Overture
3:
The
Mid
and
High
frequency
transducers
of
Overture
1
or
2
or
3
are
powered
by
the
receiver
or
power
amplifier
connected
to
the
input
terminals
of
Overture
1
or
2
or
3.
The
Subwoofer
transducer
in
Overture
1
and
2
and
3
is
powered
by
a
subwoofer
amplifier
inside
the
Overture
speaker
enclosure.
At
the
moment
audio
signals
at
the
Overture
input
terminals
exceeds
a
level
of
30
mV,
the
Overture
Auto
detect
circuit
will
switch
the
subwoofer
amplifier
from
the
STANDBY
to
the
ON
mode.
Approximately
10
minutes
after
the
audio
information
drops
below
the
sensing
threshold,
the
Auto
detect
circuit
will
switch
the
subwoofer
amplifier
from
the
ON
mode
to
the
STANDBY
mode.
AUTO
ON
due
to
noise:
Most
amplifiers
or
receivers,
while
in
the
Power
OFF
mode,
have
an
output
impedance
at
their
speaker
terminals
in
the
order
of
several
kilo
Ohms.
However,
certain
types
or
receivers
and
power
amplifiers
disconnect
the
power
amplifier
section
from
the
speaker
terminals
by
means
of
a
relay.
As
result,
the
speaker
cables
connected
to
the
Overture
input
terminals
may
pick
up
RF
or
50/60
Hz
noise.
This
noise
can
activate
the
Auto
detect
circuit
in
Overture
and
switch
the
subwoofer
amplifier
to
the
ON
mode.
Approximately
10
minutes
after
the
noise
disappears,
the
Auto
detect
circuit
will
switch
the
subwoofer
amplifier
back
to
the
STANDBY
mode.
As
result,
the
customer
may
hear
continual
ON-OFF
cycling
of
the
subwoofer
amplifier.
In
the
event
you
receive
a
Overture
1,
2
or
3
with
the
complaint
“unit
is
turning
on
&
off
(audible
relay
clicking)
even
though
the
receiver
is
turned
off”,
insert
a
banana
plug
w/
1000Q
terminating
resistor
(Infinity
part#
518-0425)
into
the
Overture
banana
speaker
jacks.
Infinity
Systems,
Inc.
250
Crossways
Park
Drive,
Woodbury,
New
York
11797
(516)
496-3400

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