Removal and Installation Procedures
6-50
TDS 420A, TDS 430A & TDS 460A Service Manual
1. Access the module: Be sure you have performed the Access Pr ocedure on
page 6--13 and removed the modules as instructed.
2. Assemble equipment and locate modules to be removed:
a. Have handy a screwdriver with a size T-15 Torx
R tip (Items 1 and 2)
and a flat-bladed screwdriver (Item 5).
b. Locate the modules to be removed in the locator diagram Internal
Modules, Figure 6--3 on page 6--19.
3. Orient the digitizing oscilloscope: Set the digitizing oscilloscope so its left
side is down, with its front facing to the left.
4. Remove the backplane assembly: Using Figure 6--20 as a guide, perform the
following substeps:
a. There may be board brackets, mounted on the rear panel, that correspond
to unused board slots or options in the backplane assembly. For any
bracket, do the following subparts to remove it:
H Remove the T-15 Torx
R screw(s) that secure(s) the bracket at the
inside rear corner of the main chassis.
H Working from the rear of the oscilloscope, remove the T-15 Torx
R
screw(s) from the bracket(s) that secure(s) the bracket or assembly to
the rear of the main chassis.
b. Unplug the backplane to acquisition cable at J7 of the acquisition
assembly.
c. Unplug the backplane to attenuator cable at J101 of the attenuator
assembly.
d. Unplug the backplane to AUX power cable at J6 of the backplane.
e. Unplug the backplane to front panel cable at J8 of the backplane
assembly.
f. Unplug the backplane to low voltage power cable at J7 of the backplane
assembly.
A01 Backplane Assembly
and its Mount
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