Agilent Technologies E8401A, User And Service Manual, Page: 52 / 66

50 Servicing Your Mainframe Chapter 3
Replacing the
Impeller
1. Turn off the mainframe and remove the power cord.
2. Remove the rear panel. Refer to “Removing the Rear Panel from the
Mainframe” on page 45 for instructions.
3. Disconnect the impeller wires from the backplane by gently pulling
down on the wire housing (Figure 3-6). Note the position of the
connector for re-installation.
Caution
Static sensitive components on the mainframe backplane are
exposed when the impeller cover is removed. Use care when
removing / inserting the impeller wires.
4. Loosen the two m4x8 pan head torx screws which secure the impeller
assembly to the mainframe.
5. Lift the impeller assembly off the screw locators and gently pull the
impeller assembly out from the mainframe (Figure 3-6).
Figure 3-6. Removing / Installing the Impeller
Remove two screws