To Remove And Replace An Attenuator - Agilent Technologies 54845B Manual

To remove and replace an attenuator

Use this procedure to remove and replace an attenuator assembly. When necessary, refer to
other removal procedures.
CA UT IO N ELECTROSTATIC DISCHARGE!
Use grounded wrist straps and mats when servicing the acquisition board. Electrostatic discharge
can damage electronic components.
Do Not Remove the Attenuators from the Acquisition Board
Attenuators are part of the acquisition board. When replacing the acquisition assembly, do not remove
the attenuators.
Using ESD procedures, remove the acquisition board assembly from the unit.
1
Using a Torx T6 driver, remove the heatsinks from the associated A/D-FISO hybrids.
2
The heatsinks must be removed first to allow you to disconnect the semi-rigid cables from the
hybrid end before disconnecting the cables from the attenuator end.
Carefully disconnect the semi-rigid cables from the A/D-FISO hybrids, then disconnect
3
from the attenuator ends.
Carefully lift up on the rear of the attenuator boards near the two mating connectors
4
to remove from the acquisition board.
Replace the attenuator by reversing this procedure. Torque the semi-rigid cables to no
5
more than 5 in-lbs and the heatsink screws A13H3 to 3 in-lbs.
Chapter 6: Replacing Assemblies

To remove and replace an attenuator

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