Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-39
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 TorxR tip (Items 1 and 2).
3. Orient the oscilloscope: Set the oscilloscope so its top is down on the work
surface and its front is facing you.
4. Remove the Attenuator Assembly:
a. Unplug the backplane to attenuator cable at J101.
b. Using Figure 6--14 as a guide, remove the four T-15 TorxR screws
securing the attenuator assembly to the front of the chassis.
c. Lift the attenuator assembly away from the oscilloscope to complete its
removal.
5. Reinstallation:
a. Perform in reverse order substeps 4a and 4c, reversing the removal
instructions 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 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
A05 Attenuator A ssembly
and Shield
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