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3.
Discharge the CRT anode to the terminaL chassis by inserting
a
Long fLat bLade screwdriver under the high voLatge
anode
cup
of fLyback transformer 2 and shorting the shaft of
the
screwdriver
to the top of the metal bezel.
Care should
be
taken so you are not in contact with the metal chassis
o~
to
the screwdriver shaft, since high voltage is present.
4.
Disconnect the anode cup of T2 from the CRT.
5.
Disconnect
all
other
connectors
from
the
monitor/power
supply board.
6.
Disconnect the board from the terminal chassis
by unfasten-
ing the two screws that attach head sink HS1 of the monitor/
power supply to the chassis.
7.2
PROCEDURE FOR INSTALLING THE MONITOR/PS TO THE TERMINAL BASE
(See
Figure 6:
System Wiring Diagram and
Figure
D-2:
Circuit
Diagram.)
1.
Power
is supplied to the unit through a 5-pin molex connec-
tor
attached
to two insulated wires connected
to
the
AC
power
connector and the ON/OFF switch mounted on the termi-
nal chassis.
By connecting these two wires to pins 3 and
5
(first
and
third
pins
from
the
lower
end
of
the
monitor/power supply pcb) of J2 of the power
supply/dispLay
board,
the
product
is set
for
115
VAC
operation.
By
reversing
the
molex
connector so that
these
wires
are
connected
to pins 1 and 3 of J2,
the product is configured
to operate at 230 VAC.
2.
The
power
transformer mounted on the terminal
chassis
is
connected to the board via a 12-pin molex connector to J1.
3.
Attach
the
monitor/power
supply
board
to
the
terminal
chassis with two screws.
4.
The
six-circuit CRT/monitor harness is attached to
pins
1
through 6 of J4.
5.
The
bezel mounted
brightness
control is connected to pins
7 through 9 of J4.
6.
The yoke assembly is connected to pins 11 through 14 of J4.
7.
The
high voltage connector of T2 is attached to
the
anode
button Located on the top surface of the CRT.
monitor/power supply board 3-4
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