Removal and Installation Procedures
TDS 520A, 524A, 540A, & 544A Service Manual
6Ć45
H Rear Cover and Cabinet (page 6Ć20)
RearĆPanel Cables
1. Assemble equipment and locate modules to be removed: Have handy a
1/4 inch nut driver (Item 8).
2. If removing the GPIB cable, do the following substeps:
a. Unplug the GPIB cable from its jack (J35) of the processor/display
board.
b. Working from the rear panel and using the 1/4 inch nut driver, unĆ
screw the two hexĆheaded mounting posts that secure the cable to
the rear chassis.
c. Working from inside the oscilloscope, lift the cable out of the rear
chassis.
3. If removing any cable connected to the rear panel BNC connectors, do
the following:
a. Do the procedure A10 Acquisition Board, on page 6Ć45.
b. Using a pair of needle nose pliers, reach between the main chassis
and the rear chassis and unplug the cable to be removed.
c. For the cables CH 3 OUT or AUX TRIGGER IN, disconnect the cable
from its cable clamp on the main chassis
d. Note the cable's color code for later reinstallation; then lift it away
from the oscilloscope to remove it.
4. Reinstallation: Reverse substeps in step 2 and 3 to reinstall any cables
removed. See A10 Acquisition Board to reinstall the acquisition board if it
was removed.
A10 Acquisition Board
1. Assemble equipment and locate modules to be removed:
a. Have handy a screwdriver with a size TĆ15 TorxR tip (Items 1 and 2).
b. Locate the modules to be removed, including those listed under
Additional Modules Removed in the locator diagram OuterĆChassis
Modules, Figure 6Ć2, page 6Ć13.
c. Do the procedure A14 D1 Bus and Power Cables (page 6Ć34) to
remove the D1 bus and the interconnect cables.
2. Orient the oscilloscope: Set the oscilloscope so its top is down on the
work surface and its front is facing you.
3. Remove the Acquisition Board: Use Figure 6Ć21 as a guide.
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