Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-47
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 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 of you.
4. Remove the display board: Using Figure 6--18 as a guide, perform the
following substeps:
a. Unplug the monitor to display cable at J2.
b. Remove the single T-15 Torx
R screw from the bracket that secures the
CPU assembly at the inside rear corner of the main chassis.
c. Remove the single T-15 Torx
R screw from the bracket that secures the
display assembly at the inside rear corner of the main chassis.
d. Working from the rear of the oscilloscope, remove the single T-15
Torx
R screw from the bracket that secures the display assembly to the
rear of the main chassis.
e. Grasp the board by its edge and pull outward to unplug it from J4 of the
backplane assembly to complete the removal.
5. Reinstallation:
a. Perform in reverse order substeps 4a-4e, reversing the removal instruc-
tions in each substep to reinstall the assembly.
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 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
A02 Display Assembly
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