Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-69
b. See the following procedures in the order listed to replace modules
removed by the access procedure:
H A08 Jumper Board Assembly, D1 Bus, and Board Supports on
page 6--44 (board supports and D1 bus only).
H A06 Front-Panel Assembly, ESD Shield, and Menu Flex and Probe
Code Flex Circuits on page 6--35.
H Trim Ring, Menu Elastomer, Menu Buttons, and Front EMI Gaskets
on page 6--31.
H Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet
Handle and Feet (page 6--27) to reinstall the cabinet and rear cover.
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. Assemble equipment and locate modules to be removed: Have handy a
screwdriver with a size T-15 Torx
R tip (Items 1 and 2). Locate the acquisi-
tion assembly 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 up, with its front facing you.
4. Remove the acquisition assembly: Use Figure 6--28 as a guide.
a. Unplug the cable from the backplane assembly from J7 of the acquisition
assembly.
b. Unsolder the wire from the AUX TRIGGER/EXT CLOCK BNC.
c. Remove the six screws securing the acquisition assembly to the bottom
of the chassis, and lift out the acquisition assembly to complete its
removal.
A04 Acquisition Assembly
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