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MAINTENANCE
7.7.3 Case Disassembly
Refer to Figure 7-10 and disassemble the case as follows:
1. Using a small screwdriver, pop the trim strips out from
the inside.
Note that the trim strips are not inter-
changeable from top to bottom.
2. Remove the four screws that secure the front uanel to
the case ends and remove the front panel (the r&v panel
was removed as part of the procedure
in paragraph
7.7.2).
Remove the two screws that attach each bottom rail to
the case sides and remove the rails.
If desired, remove the two screws that attach each han-
dle to the case sides. Compress the handle and guide
it through
the slots to remove it.
When reassembling
the case, make sure that the rails
are installed
in the correct positions,
or it will not be
possible to properly secure the circuit boards that attach
to the rails.
7.7.4 Rear Panel Disassembly
Refer to Figure 7-11 and remove parts from the rear panel
as follows:
1. Remove the four screws and nuts that attach the fan and
fan guard to the rear panel and remove them.
2. Remove the nut that holds the green ground wire to the
rear panel and disconnect
the wire.
3. Remove the two nuts that secure the line receptacle/filter
and remove the receptacle.
4.
To remove the two BNC connectors, unscrew the nuts
and pull the jacks and attached wires of the mounting
holes.
5. When installing
these parts, make sure that all screws
and nuts are tight, and that the ground wire is proper-
ly connected.
WARNING
The ground
wire must
be properly
installed
to
ensure
continued
protection
against
possible
shock
hazards.
7.7.5 Front Panel Disassembly
An exploded view of the front panel assembly is shown
in Figure
7-12. Use the following
procedure
to dis-
assemble the front panel.
1. Remove the screws that attach the power switch to the
front panel and remove the switch.
2. Using an allen wrench, loosen the two allen screws that
secure each front panel rail, and remove each rail from
the front panel.
3. Remove the display board from the front panel.
4. When reassembling the front panel, make sure that the
rails are flush with the end of the panel, and that the
display board is installed properly
in the card guides
in the rails. Note that some adjustments
may be
necessary if front panel buttons stick.
7-20
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