Removal and Replacement
TDS 340A, TDS 360 & TDS 380 Technical Reference
6–15
3. Repeat the process, prying on the bottom edge of the trim ring to complete
its removal. Lay the trim ring on its face on the work surface.
4. If you are servicing the front EMI gaskets, discard the old ones.
5. If you are servicing the menu elastomer, lift it out of the trim ring.
6. If you are servicing the menu buttons, lift them out of the trim ring.
7. Reinstallation:
a. Insert each button into its hole in the trim ring.
b. Align the menu elastomer over the menu button holes in the trim ring
and press it in to install. Avoid touching the carbon contact points on the
elastomer when installing.
c. Without installing the EMI gaskets, align the trim ring to the front of the
chassis and push it on to seat. Be sure that both pairs of flex locks, one
pair each at the inside top and bottom of the trim ring, snap over the
edge of the chassis.
d. Lay the oscilloscope so its front cover is on the work surface.
e. Align an EMI gasket so it lies between any pair of adjacent flex locks
along the groove between the cabinet.
f. Using a wood spudger, push the EMI gasket until it is firmly seated at
the bottom of the groove (see Figure 6–8). It should not overlap either
flex lock.
g. Repeat the process just described to install the remaining three gaskets.
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