Agilent Technologies 45A, 46A, 54835A manual To remove and replace an attenuator

Chapter 6: Replacing Assemblies

To remove and replace an attenuator

	To remove and replace an attenuator
	Use this procedure to remove and replace an attenuator assembly. When necessary, refer to
	other removal procedures.
CAUTION	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.

1Using ESD procedures, remove the acquisition board assembly from the unit.

2Using a Torx T6 driver, remove the heatsinks from the associated A/D-FISO hybrids.

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.

3Carefully disconnect the semi-rigid cables from the A/D-FISO hybrids, then disconnect from the attenuator ends.

4Carefully lift up on the rear of the attenuator boards near the two mating connectors to remove from the acquisition board.

5Replace the attenuator by reversing this procedure. Torque the semi-rigid cables to no more than 5 in-lbs and the heatsink screws A13H3 to 3 in-lbs.

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