Clear-Com MS-222 User Manual

INSTALLATION
/
Clear-Corn
MS-222
2-Channel
Main
Station
"CAUTION
These
servicing
instructions
ame
for mu
by
ualfied
service
psnnel
ni
IQ
avoid
electric
shock
AQ
n
perform
an
servicing
qtr
tha n
contained
in
itn
Operating
Instructions
unless
Y
are Qualified
to
d js:
2.4
INTERNAL
OPTIONS
AND
ADJUSTMENTS
ACCESS
TO
INTERNAL
OPTIONS
AND
ADJUSTMENTS:
To
access
the
internal
options
and adjustments
the
cover
of
the unit
must
be
removed.
Remove
the two
screws
on
either
side
of the
station.
Remove
the
four
screws
on the
top of
the station.
Remove
the
cover.
S~-Zzz
MU2
COMPONENT
SIDE
Location
of Jumpers
and
Adjustments
on PCB
1.
JP-1
and
JP-2 Line
Length
Selection
Jumpers
Jumpers
JP-1
and
JP-2
allow
the optimization
of
the hybrid
null
circuitry
for excessive
intercom
cable
lengths.
JP-1
is for channel
A and
JP-2
is for
channel
B.
The
"S" position
of the
jumpers
is
for 'short'
lines
(200
- 500
feet).
The
"L"
position
is
for
lines
in excess
of 500
feet
The MS-222
is shipped
from the
factory
with
the
jumpers
in
the "L"
position.
For very
short
total
line
lengths
(less
than
200
ft) remove
the jumper
completely.
2.
JP-3
Interrupt
Enable/Disable
Jumper
Jumper
JP-3
allows
the
user
to enable
the
"Stage
Announce"
mute
function
of active
"Talks".
Position
"'r is
for yes
to muting
and "N"
for no.
The
MS-222
is
shipped
from
the factory
with JP-3
in the
'Y'
position.
3. Power
Supply
Voltage
Adjustment
Potentiometer
P3
is provided
for trim
adjustment
of the
+30
volt power
supply.
If
power
supplies
are
intended
to
be paralleled
on
the same
line their
outputs
should
be
as
close
as possible
to each
other
for
proper
sharing
of
current.
11/92
Rev.
1.3
Page
14

Clear-Com MS-222 Specifications

General

Brand	Clear-Com
Model	MS-222
Category	Intercom System
Language	English