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Chapter 6: Replacing Assemblies
To remove and replace an acquisition hybrid
6–33
To replace the acquisition hybrid
The location of pins and other locator features will guide the alignment of parts. This assembly
cannot be assembled incorrectly without forcing.
1
Install the hybrid with the three corner holes over the three large locator pins.
2 Install the top plate with the three cut-out corners over the three locator pins.
CAUTION DO NOT USE EXCESSIVE FORCE!
Tighten the hybrid carefully. Excess force or improper procedure may break the hybrid, which
is very expensive to replace.
3
Loosely install the two hex standoffs along the long dimensions of the top plate.
4 Loosely install the two M2 pan-head screws.
5 Use a 5 mm (3/16 in) torque driver set to 0.34 Nm (3 in-lbs) to tighten the standoffs in
the following sequence.
a Tighten any standoff to specifications.
b Tighten the standoff directly opposite the first one to specifications.
c Tighten the remaining two screws to specifications, using the Torx T6 torque driver set
to 0.34 Nm (3 in-lbs).
6
Connect the semi-rigid cables to the attenuator ends, then connect to the A/D-FISO
hybrids.
7 Check for the graphite pad on the underside of the heatsink, then install it with the hole
that is near one corner toward the front of the instrument.
8 Install the heatsink spring with the curve down.
9 Install the two heatsink screws. Use a T6 torque driver set to 0.34 Nm (3 in-lbs) to
tighten them.
If You Permanently Replace Parts
When you replace acquisition system components, you should rerun the self calibration routines prior to
performance verification or use of the instrument.