Introduction
Temperature Guidelines
The
inner
workings
of the
OP
/ 4
contain
a
substantial
amount
of
computerized
and
electronic
circuitry
that
can
be
susceptible
to
damage
when
exposed
to extreme
temperature
changes.
When
the
OP
/4
is
brought
inside
after
sitting
in
a
cold
climate (i.e. the
back
seat of
your
car),
condensation
builds
up
on
the
internal
circuitry
in
much
the
same
way
a
pair
of glasses fogs
up
when
you
come
inside
on
a cold
day.
If
the
unit
is
powered
up
as
this condensation occurs,
components
can
short
out
or
be
damaged.
Excessively
high
temperatures
also pose a
threat
to the
unit,
stressing
both
the
internal
circuits as well as
the
case.
With
this
in
mind,
it
is highly
advisable to follow these
precautions
when
storing,
mounting
and
setting
up
your
OP
/
4:
•
Avoid
leaving
the
OP
/ 4
in
temperatures
of less
than
50
degrees
Fahrenheit
or
more
than
100
degrees Fahrenheit.
•
When
bringing
the
OP
/ 4
indoors
after travel,
allow
the
unit
at
least
twenty
minutes
to
reach
room
temperature
before
powering
up.
In
the
case
of
excessive
outdoor
temperatures
(below
50
degrees
Fahrenheit
or
above 100 degrees Fahrenheit), allow
an
hour
or
more
before
power
up.
• A
void
leaving
the
OP
/ 4
inside
a vehicle
exposed
to
direct
sunlight.
Rack Mounting
Because
the
OP
/ 4
operates
with
an
internal
transformer,
there
is a certain
amount
of
heat
generated
by
this unit. For
better
reliability,
we
recommend
that
you
do
not
install this
unit
beneath
devices
that
are sensitive
to
heat,
or
above
power
amps,
tube
equipment,
or
other
rack-
mount
units
that
emit
a lot
of
heat.
Powering Up Your DP/4 In a MIDI Set Up
iv
Just
as
you
would
power
up
the
individual
components
before
turning
on
the amplifier
in
your
home
stereo
system,
you
should
first
tum
on
the
MIDI
data
transmitting
source (processors,
keyboards,
modules,
etc.) before
you
power
up
the receiving MIDI source. For instance,
if
you're
using
the
DP
/ 4 to receive MIDI information from a
keyboard/
sequencer,
you
would
tum
the
keyboard
on
before
the
OP
/ 4. This will
prevent
any
unwanted
MIDI information from
being
"spit"
out
of the
transmitting
source
(keyboard/sequencer)
during
power
up,
which
could
confuse
the
MIDI receivers,
thereby
disabling them.
If
this
should
occur,
tum
off the receiving
module,
and
then
tum
it
back
on.
ENSONIQ DP/4 Musician's Manual
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