JBL 6230 - SECTION II INSPECTION AND INSTALLATION; 2.1 UNPACKING AND INSPECTION; 2.2 ENVIRONMENTAL CONSIDERATIONS

SECTION
II
INSPECTION
AND
INSTALLATION
2
.
1
UNPACKING
AND
INSPECTION
Your
JBL
Power
Amplifier
was
carefully
packed
at
the
factory,
and
the
container
was
designed
to
protect
the
unit
from
rough
handling.
Nevertheless,
we
recommend
careful
examination
of
the
shipping
carton
and
its
contents
for
any
sign
of
physical
damage
which
could
have
occurred
in
transit.
Save
the
carton
and
packing
in
the
unlikely
event
the
unit
must be
returned
for
service;
if
you do
not
have a
carton,
call
the
factory
for
one
before
shipping
the
unit.
If
damage
is
evident,
do
not
destroy
any
of
the
packing
material
or
the
carton,
and
immediately
notify
the
carrier
of a
possible
claim
for
damage.
Shipping
claims
must
be
made
by
the
consignee.
The
shipment
should
include
the
Power
Amplifier
and
the
Instruction
Manual
(this
book)
.
2.2
ENVIRONMENTAL
CONSIDERATIONS
This
amplifier
has
been
constructed
to
operate
satisfactorily
with
program
material
at
normal
room
temperature
and
humidity.
This
presumes a
free,
unrestricted
flow
of
cooling
air
to the
rear
mounted
heatsink.
When
the
amplifier
is
mounted
in
a
rack
it
is
important to
ensure
that
cool
air
is
allowed
to
reach
the
heatsink,
and
that
heated
air is
allowed
to
flow away
from the
amplifier.
In
most
cases
this
will
only
require
ventilation
grills
to
be
provided
so
cool
air can
enter
the
rack
at
the
bottom
and
hot
air
can
exhaust
at
the top
through
natural
convection.
In
some
installations
it may
be
necessary
to
provide
forced
air
cooling
to
the
amplifier
and
the
space
in
which
it is
mounted.
These
amplifiers
have
thermo-protective
circuits
that
will
operate
if
the
amplifier
overheats.
This
will
happen
for
one or
more
of
the
following
reasons:
1.
Insufficient
natural
air
flow.
2.
Average
power
and
duty
cycle
of
the
program
material
too
high.
3.
High
ambient air
temperature
in
which
the
amplifier
is
oper-
ating.
It
is
not
really
possible
to
state
exact
requirements
for
air
flow
because
of
the
number
of
variables,
but
in most
cases
fans
with
70-120
CFM
will
provide
sufficient
air
flow.
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