Orban 424A Operating Manual page 35

Factory
Service
Please
refer to the
terms
of
your
Orban
Associates Limited One-Year Standard
Warranty
,
which extends
to
the
first
end-user. This
warranty was packed with
the
424A
but
is
not
bound with
this
manual. After expiration of the warranty, a
reasonable
charge
will
be
made
for parts, labor,
and packing
if
you choose
to
use
the
factory service facility.
Repaired
units will
be returned C.O.D.
In all
cases,
transportation
charges
(which are
usually quite
nominal)
shall
be borne by
the
customer.
After
a formal
Return Authorization
number
is
obtained
from
the factory, units
should be shipped
to
CUSTOMER
SERVICE
at
the address
shown
on the front
page
of
this
manual.
YOUR RETURN
AUTHORIZATION
NUMBER
MUST
BE
SHOWN ON THE
LABEL,
OR
THE
PACKAGE
WILL
NOT
BE
ACCEPTED!
Shipping
Instructions
If
the
original
packing material
is
available,
it
should be
used.
Otherwise, a carton
of
at least
200 pounds bursting
test
and no
smaller than 22" x
15"
x 9"
should be
employed.
The 424A
should
be packed
so that
there
is
at
least
1-1/2" of
packing material
protecting every
point.
A
plastic
wrap around the chassis
will
protect the finish.
Cushioning material such
as Air-Cap, Bubble-Pak,
foam
"popcorn", or
fibre
blankets
are acceptable. Folded newspaper
is
not
suitable.
Blanket-type materials should be
tightly
wrapped
around the
424A and taped
in
place to prevent the
unit
from
shifting out of
its
packing and contacting the walls
of the carton.
The
carton
should
be packed evenly and
fully
with the packing material
filling all
voids such
that
the
unit
cannot
shift
in
the carton. Test
for this
by closing but not
sealing the carton and shaking vigorously.
If
the unit
can be
felt
or
heard
to
move,
use
more
packing.
The
carton should be well-sealed with 3"
reinforced sealing
tape applied across the
top
and bottom
of the
carton
in
an "H"
pattern.
Narrower
or parcel-post
type
tapes
will
not stand the stresses applied
to
commercial
shipments.
The package
should be
marked
with the
name
of the shipper,
and
the
words
in
red:
DELICATE INSTRUMENT,
FRAGILE! Even
so,
the
freight
people
will
throw
the box
around
as
if it
were
filled
with
junk.
The
survival of
the
unit
depends
almost
solely
on the care taken
in
packing!
3:
CIRCUIT
General: Except
for the
power
supply,
the
"A" and
"B" channels
of
the dual-
DESCRIPTION
channel
424A
are independent and
identical.
The
circuitry
is
divisible into six
major
blocks.
These
are:
1)
input buffer
2)
voltage-controlled amplifier
3)
compressor/limiter
control circuitry
4)
de-esser control circuitry
5)
VCA
LEVEL
meter
driver
6
)
power
supply
31