Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-35
f. If present, remove the screw securing the spacer to the drive, and lift the
spacer away from the drive to complete the removal.
4. To reinstall the disk drive, perform steps 3a--3f in reverse order.
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 flat bladed screwdriver (Item 5).
b. Locate the modules to be removed in the locator diagram Cabinet and
Front-Panel Mounted Modules, Figure 6--2 on page 6--16.
3. Orient the oscilloscope: Set the oscilloscope so its bottom is down on the
work surface and its front is facing you.
4. Remove the front-panel assembly:
a. Insert a flat-bladed screwdriver (Item) into the slot at the front-right of
the chassis. Push inwards to release the snap lock at the right side (see
Figure 6--12).
b. Lift the front-panel assembly out of the front of the main chassis until
you can reach the interconnect cables connecting it to various other
modules.
c. Unplug the following cables from their jacks on the front-panel
assembly:
H The menu flex circuit at J103
H The probe code flex circuit at J104
H The CPU-to-front panel cable at J101
H The backplane-to-front panel cable at J106
d. Finally, lift the front-panel assembly out of the front of the main chassis
to complete the removal.
5. Remove the ESD shield: If replacing this shield, note how the small cutout
on the shield is aligned to the snap lock at the lower-left corner of the
assembly and reference for later replacement. Then pull the ESD shield off
the left edge of the front panel to remove. (The shield snaps on and off.)
A06 Front-Panel
Assembly, ESD Shield,
and Menu Flex and Probe
Code Flex Circuits
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