Removal and Installation Procedures
Maintenance
6Ć42
A11 Processor/Display Board
Additional modules Removed: D1 bus and analogĆand digitalĆpower cables.
1. Assemble equipment and locate modules to be removed
a. Have handy a screwdriver with a size TĆ20 TorxR tip (Items 1 and 2).
b. Locate the modules to be removed in the locator diagram OuterĆ
Chassis Modules, Figure 6Ć2, page 6Ć13.
c. Do the procedures Rear Cover and Cabinet (page 6Ć20), A14 D1 Bus
and Power Cables , and A23 SerPar board that immediately precedes
this procedure to remove those items.
2. Orient the oscilloscope: Set the oscilloscope so its bottom is down on the
work surface and its rear is facing you.
3. Disconnect the fan from processor/display board: Unplug the fan's power
cable from J20.
4. Remove the processor/display board: Use Figure 6Ć19 as a guide while
doing the following substeps:
a. Working from the rear panel, remove the two screws mounting the
support bracket in the rear panel. Then lift it out from the rear panel.
b. Unplug the interconnect cable from the GPIB connector on the rear
cover at J35 of the processor/display board. Disconnect the bus
cable at J5. Unplug J62 video signal connector, J51 Monitor VGA
connector, J37 RS232/Centronics connector, and J38 floppy driver
connector.
c. Grasp the board by its right and left sides and pull it towards the rear
of the oscilloscope. This will release the processor/display board
from the eight board mounts securing the board above the top cover.
d. Lift the board up away from the oscilloscope chassis to complete the
removal.
5. Reinstallation:
a. Do, in reverse order, steps 3 through 4, reversing the removal instrucĆ
tions of each step to reinstall the processor/display board.
b. See the procedures A14 D1 Bus and Power Cables (page 6Ć34), A23
SerPar Board (page 6Ć35), and Rear Cover and Cabinet (page 6Ć20)
to complete reassembly of the oscilloscope.
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