Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-67
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
5
@
16
inch nut-driver (Item 9).
b. Locate the auxiliary power supply in the locator diagram Internal
Modules, Figure 6--3 on page 6--19.
3. Orient the digitizing oscilloscope: Set the digitizing oscilloscope so its
bottom is down on the work surface and its rear is facing you.
4. Remove the auxiliary power supply: Reference Figure 6--27 while doing the
following substeps.
a. Unplug the monitor-power cable at J4, the fan-power cable at J3, the
cable from the backplane assembly at J7, and the cable from the low
voltage power supply assembly at J1 of the low voltage power
supply assembly.
b. Using a
5
@
16
inch nut driver remove the nut(s) that secure the cable from
the lug and remove it. When replacing the cables on the ground lug,
install the cable from the line filter last.
c. Now , release and disconnect the remote-power cable where it joins the
cable from the low voltage power supply assembly.
d. Unplug the two connectors at the line filter.
WARNING. When reconnecting the auxiliary power supply assembly to the line
filter, be sure to connect the neutral side of the line filter to the black-striped
lead and the load side to the white-striped lead.
e. Remove the two T-15 Torx
R screws mounting the auxiliary power
supply assembly to the chassis. Then, pull up on the board to release it
from the two retainers. Lift the board out of the chassis to complete
the removal.
A07 Auxiliary Power
Supply
B010100 - B079999
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