Removal and Installation Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
6-29
5. Remove the cabinet:
a. Remove the T-15 TorxR screw at the left side of the oscilloscope.
b. Grasp the two handle handle hubs and pull them outward as if to rotate
the handle.
c. While holding the handle hubs pulled out, lift the cabinet upwards to
slide it off the oscilloscope.
d. At the rear of the cabinet, grasp its left and right edges. Take care not to
bind or snag the cabinet on the internal cabling as you remove the
cabinet.
e. If no other cabinet modules are being serviced, skip the rest of this
procedure.
6. Remove the handle assembly: If removing the handle assembly for cleaning
or replacement, do the following substeps:
a. Working from the inside of the cabinet, remove the T-20 TorxR screw
securing each handle hub to the cabinet.
b. Working from the outside of the cabinet, grasp the two handle hubs and
pull them outward from the cabinet until they are out of the cabinet.
c. While holding the handle hubs pulled out, lift the handle away to
remove.
STOP. DO NOT do step 7 to remove the EMI gasket from the rear of the cabinet
unless it must be replaced due to damage. If you are not replacing that gasket,
skip to step 8.
When reinstalling the EMI gasket and the oscilloscope cabinet, carefully follow
the instructions given. Unless the instructions are performed properly, the
oscilloscope may not meet its emissions requirements (EMI).
7. Remove the EMI gasket: If removing the EMI gasket for replacement, do the
following substeps.
a. Locate the EMI gasket to be removed in the diagram Fr ont cover, r ear
cover, cabinet, emi gasket, and cabinet handle and feet removal, Figure
6-- 8.
b. Look for the point where the ends of the gasket touch in the channel at
the rear edge of the cabinet.
c. Use a pair of needle-nose pliers to pry up one of the ends of the gasket.
d. Grasp the EMI gasket, and gently pull it out of the its channel.
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