Eddystone 990R - Mains Voltage Adjustment; External Connections

Assembly
of
EPR
30
/RM
Panoramic
Display
Installation
.
1.
Remove
rubber
feel
from
receiver
and
display
unit (if
fitted)*
2.
Mount
receiver
and
display
unit
in
rack
with,
receiver in lower
position.
3.
Attach
IF
Converter
Type
959/l
to
rear of
equipment.
Refer to
sheet supplied.
4.
Make
connections
as
per
paras
(6)
and
(7)
for bench-mounted
installation.
NB
Use
IF
OUTPUT
(l)
for
wi
de-band
presentation.
11AI1TS_Y0LTAGE_ADJUSTMMT
The
voltage
tappings
on
the
primary
side
of
the power
transformer
must
be
checked
and
changed
if
necessary
before
connecting
the
receiver
to
the supply.
Tapping points
are
located
below
chassis
at
the
rear
of
the
set
and are
accessible
after removing the
cabinet.
The
transformer
has
two
separate
130V
primaries
tapped
as
follows
s-
10V
(1)
ov
(2)
100V
(3)
120V
(4)
DISCONNECT
FROM
Rear
of
set
0
0
0
O
SUPPLY
BEFORE
0
0
0
O
ADJUSTING TAPS.
*5
10V
(6)
ov
(7)
100V
(8)
120V
(9)
For
voltages
in
the
range
200/260V, operate
appropriate
sections of
secondaries in
series
5
for
voltages
in
the
range
100/1
30V, operate
equal
sections of
the
primaries in
parallel.
Tappings
(3)
or
(4)
should
be
linked
to
(6)
or
(7)
for series
working.
The
receiver
leaves
the
factory
with
tappings
set for
240V
operation.
EXTERNAL
CONNECTIONS
Mains
Operation
.
A
suitable
polarised
connector
and
three-core
mains
lead are
supplied
with
the
set.
The lead
is
colour-coded
as
follows:-
RED 1
LIVE,
BLACK
1 NEUTRAL,
GREEN s EARTH.
One
end
of
the
lead
is
left
free
so
that
the user can
fit
a
plug of a type
sui table
for
connection
to
the
local
supply.
When
operating
from
AC
mains,
it is
important to check
that
a
shorting
plug
is
in
position
at
the
12V
DC supply
socket.
Its purpose
is to
complete the
12V
regulated
positive
line
to
the
appropriate
receiver
circuits.
The
plug
should be wired
as
PL
8
on
the
circuit
diagram
at
the
rear
of
the
Manual.
12V DC
Operation
.
(NEGATIVE
EARTH
ONLY)
If
an
extended
period
of
operation
from
12
V
DC
is
envisaged,
the existing shorting
plug
(which
is
used
in
mains
operation
to
complete
the 12V supply line) can be re-wired
as
shown at
PL9
on
the
circuit
diagram.
On
the other hand, where
12V
working
is
for
emergency
operation
in
the
event
of
mains
failure,
an
additional
plug
should be
ob-
tained
to
facilitate
rapid
changeover.
The
plug
is
a
three-way
polarised
female
connector
Bulgin
Type
No.
P430.
Ancillary
Supply
.
The
12
V
DC
supply
at
SK13 is
available
for connection to external
units
when
the
receiver
is
operating
from
AC
mains
supplies.
Maximum available current
drain
is
35mA.
Note
that
the
negative
lead
from
the
external
unit
must be
connected
to
the
earth
terminal
and
not
to SKI
3,
otherwise
FS1
and
S10A will
be
short-circuited if an
earth
return
exists
between
the
receiver
and
the ancillary
unit.
-
15
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