Removal and Installation Procedures
6-60
TDS 420A, TDS 430A & TDS 460A Service Manual
H Line Fuse and Line Cord (page 6 --26) to reinstall the line cord,
which completes the oscilloscope reassembly.
1. Access the module: Be sure you have performed the Access Pr ocedure on
page 6--13 and removed the modules as instructed.
2. Locate modules to be removed:
a. Use a screwdriver with a size T-15 Torx
R tip (Items 1 and 2) and a pair
of duck bill pliers (Item 8).
b. Find the low voltage power supply and, if it is to be removed, the
power-supply mount in the locator diagram Internal Modules,Fig-
ure 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 front is facing to the right.
CAUTION. When releasing the low voltage power supply from its mount, take
care not to push on the board components. Rather, push on the board edge when
performing the following step and its substeps.
4. Remove the low voltage power supply:
a. Unplug the cable coming from the backplane assembly at J2.
b. Unplug the cable coming from the AUX power supply at J1.
c. Working through the opening created when the fan was removed (Access
Procedure), remove the T-15 TorxR screw at the center of the power
supply board.
d. Using a pair of duck-bill pliers, squeeze to release each of the four flex
locks at the top edge of the low voltage power supply assembly.
e. Once released, tilt the board out away from the flex locks, and unplug
the AC power cable where it connects to the cable from the low voltage
power supply.
f. Lift the low voltage power supply assembly out of the chassis to
complete its removal.
A25 Low Voltage Power
Supply and its Mount
B010100 to B079999
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