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7-7
1. Con
Þ
rm that the micro DIN board has been re-
moved.
2. If the power supply board is still in position, locate
the two power supply mounting screws nearest
the side of the instrument. These screws extend
into the digital board. Remove these two screws.
3. If necessary, disconnect the power and display
connectors from the forward edge of the digital
board.
4. Remove the two mounting nuts from the IEEE-488
connector on the rear panel of the instrument.
5. Note that the digital board is now held in position
only by the mass termination connector P1004
which mates the digital board to the backplane
board. Carefully slide the digital board/shield as-
sembly forward until the pins of this connector are
free.
6. Slide the digital board/shield assembly to the side
to remove it from the chassis.
7. To further disassemble the digital board/shield as-
sembly, remove the two screws which fasten the
shield to the digital board, then remove the shield
from the board.
CAUTION
Do not operate the Model 7001 with
the digital board shield removed for
an extended period of time, because
the shield acts as a heat sink for one
of the +5V regulators.
Assembly notes:
Since the shield acts as a heat sink for
one of the +5V regulators, ensure that the shield stand-
off properly aligns with the regulator when re-assem-
bling.
When reinstalling the digital board/shield assembly,
position the digital board in the chassis and then slide
it back to engage P1004 on the digital board into the
mating socket on the backplane board.
Install and tighten the mounting screws in the IEEE-
488 connector. Align the pins of the micro DIN board
with the digital board, seat the micro DIN board, and
replace its retaining screw.
Install and tighten all other screws which fasten the
digital board to the chassis.
Backplane board removal
Before the backplane board can be removed, the micro
DIN, front panel, and digital boards must be removed.
Refer to the previous instructions for removing these
items, and then proceed with the following steps. Also,
refer to drawings 7001-052 Digital Board/Chassis As-
sembly, 7001-051 Card Cage/Chassis Assembly, and
7001-050 Card Cage Assembly at the end of this section.
1. Con
Þ
rm that the micro DIN board, front panel,
and digital board have been removed.
2. Locate and remove the four mounting screws
which fasten the backplane board to the chassis.
These can be removed using a long screwdriver in-
serted through the four access holes on the front
bulkhead of the chassis.
3. Carefully lift the backplane board assembly out of
the chassis.
7.5.3 Replacement of the case
Refer to 7001-054 Final Chassis Assembly at the end of
this section.
1. Reinstall any boards you have removed from the
Model 7001. If disassembly has been extensive,
temporarily reattach the power cable and turn on
the unit to con
Þ
rm proper operation of the instru-
ment before you replace the case. Remove the
power cable again before proceeding.
2. Carefully insert the rear of the instrument into the
front of the metal case. Slide the instrument fully
into the case, and engage the tabs on the forward
edge of the metal case into the slots on the rear
edge of the front bezel.
3. Reinstall the ground screw on the bottom side of
the Model 7001.
4. Install the rear bezel and tighten the rear bezel
mounting screws completely.
5. Install the left and right handle mounting ears:
Place a proper mounting ear over the rectangular
opening on the side of the instrument, near the
front bezel. Slide the handle mount upward ap-
proximately
1
Ú
8
” (3 mm) to engage the tabs on the
handle mount into the case, and align the screw
holes. Install the retaining screw.
6. Install the handle: Grasp the handle at its sides and
gently pull the ends of the handle slightly away
from each other. Insert the handle into the handle
mounts at the point where the arrows on the han-
dle line up with the arrows on the mounting ears.
Release pressure slightly, and rotate the handle un-
til it snaps to rest in the desired position. The han-
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