Tektronix TAS 465, Service Manual

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6Ć20
Trim Ring: To remove, grasp its back edge
and pressup on itstwo tab locks. Flex the
trim ring upward; then pull it forward. Repeat
for the bottom edge of trim ring.
Menu Button Elastomer
Menu Button
Trim Ring
Tab Lock
The EMI gaskets were added to the oscilloscopes in order to improve perforĆ
mance. If your instrument does not have EMI gaskets, you can install them
yourself.
1. If you are servicing the front EMI gaskets, discard the old ones.
2. 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.
3. Lay the oscilloscope so its front cover is on the work surface.
4. Align an EMI gasket so it lies between any pair of adjacent flex locks
along the groove between the cabinet and the trim ring.
5. Using a flatĆbladed spudger, push the EMI gasket until it is firmly seated
at the bottom of the groove (see Figure 6Ć9). It should not overlap either
flex lock.
6. Repeat the process just described to install the remaining three gaskets.