Chapter 6. Removals and Replacements
6.1
Covers
All
removal and exchange procedures require
that
the desired unit be made accessible by removing the
correct covers. You may
leave the
top
cover on the
display station while performing many maintenance
procedures. This protects the
CRT by partially cover-
ing it.
1.
Front cover: Push backward on the latch at the
top
center. The cover moves forward
at
the
top
while pivoting on two pins
at
the bottom. Lift
the cover
off
the
pins.
2.
Side covers: Before removing the right side cover,
remove the security key, if it
is
inserted.
Pull
the
front pin (under the front of the side cover)
toward the front
of
the display. When.the pin
reaches the
limit of movement, pivot the rear edge
of the cover
slightly away from the base and
top
cover. Lift the cover from the display station.
The
WTC
side covers use a rear retainer spring
that
prevents movement of the front pin. Release the
spring by using a screwdriver on the spring.
3. Top/rear cover: The top/rear cover can
be
re-
moved only after both side covers are removed.
Pull
out
the spring-loaded knobs
at
the lower
right and lower left
of
the
top
cover and pivot up.
Pull the
top
cover back slightly
to
disengage it
from the guides
in
the CRT frame. Carefully lift
the
cover off
the
display station.
6.2 Power Units
I
DANGER:
All
power unit removal and exchange
procedures must be performed with power off and
with
the
power cord disconnected
at
the
wall outlet.
(Switch
off
power before disconnecting
the
plug.)
6.2.1 Low-Voltage Power Supply
1.
Remove
the
low-voltage shield by loosening
the
screw
at
the
center
of
the
shield.
2 Disconnect
the
two
cable connectors (P2 and
P3)
on
the low-voltage supply (J2 and J3), and
disconnect
the
slip-on connector from the
tab
located
at
the
upper-right corner of the assembly.
See Figure 4-11.
SY27-2510-6
(1/81)
6-1
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