Specifications
label,
contained
in
the
230V Fuse Kit,
directly
below
the
AC
selection
board
housing
(Figure
3-4).
Also
replace
the
1
amp
fuse
with
the
1/2
amp
fuse
(Section
3.5),
and
attach
a 240V
cord.
Perform
the
following
steps
to
change
the
AC
input
voltage
setting
(Refer
to
Figure
3-4):
1.
Be
sure
the
power
ON/OFF
switch
is
turned
OFF
and
the
AC
power
cord
is
disconnected
from
the
Industrial
Terminal
CRT
Monitor.
2.
Slide
the
plastic
cover
to
the
left
over
the
AC
power
cord
connection.
3.
Insert
a
piece
of
wire
through
the
hole
on
the
AC
selection
board
and
twist
the
ends
together
to
form
a
loop.
4.
Grasp
the
wire
loop
with
a
pair
of
needle
nose
pliers
and
pull
to
remove
the
board.
5.
Remove
the
wire
loop
from
the
AC
selection
board.
6.
Position
the
AC
selection
board
so
that
the
number
that
is visible
matches
the
line voltage.
7.
Install
the
AC
selection
board.
The
number
now
visible
should
match
the
line voltage.
8.
If
the
220/240V
setting
is used,
place
the
230V label
below
the
selection
board.
9.
Change
the
AC
fuse
and
power
cable
as
described
below.
3.5
CHANGING
AC
FUSE
Perform
the
following
steps
to
change
or
inspect
the
main
AC
fuse
of
the
Industrial
Terminal
CRT
Monitor
(Figure
3-4):
1.
With
the
power
switch
OFF,
disconnect
the
AC
power
cord
from
the
Industrial
Terminal
CRT
Monitor.
2.
Slide
the
plastic
cover
to
the
left
over
the
AC
power
cord
connection.
3. Pull
the
FUSE
PULL
lever
to
the
left
and
remove
the
fuse.
Page 3-3
1770-805
4.
Move
the
FUSE
PULL
lever
back
to
the
right.
5.
Insert
the
proper
fuse: 1
amp
for
120V
operations
and
1/2
amp
for
220/240V
opera-
tions.
6.
Attach
a
suitable
power
cord
to
the
Indus-
trial
Terminal
CRT
Monitor.The
power
cord
supplied
with
the
unit
is
suitable
for
120VAC
operation.
For
220/240V
operation,
the
cord
must
be
replaced
or
modified
by
replacing
the
plug.
3.6
BAUD
RATE,
PARITY
AND
LINE
FRE-
QUENCY
SELECTION
Located
on
the
front
of
the
main
logic
board
of
the
CRT
monitor
is a set
of
switches
in a
switch
group
assembly
(Figure
3-5).
They
select
line
frequency,
and
the
baud rate
and
parity
used in
Channels
B
and
C
of
the
Industrial
Terminal
CRT
Monitor.
Table
3-1
shows
the
proper
switch
positions
for
selecting
line
frequency,
baud
rate,
and
parity.
Note
that
with
a 1770-T3
system
(with
a
keyboard
attached),
switches
4 and 5 can be
used
to
select
automatic
report
generation
and
turn
ON
Channel
C
during
power
up
and
Mode
Select
in
addition
to
selecting
parity.
Baud
Rate,
Parity
and
Line
Frequency
Switches
FIGURE
3-5 -
Switch
Group
Assembly
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