Removing And Replacing The A38-A41 Bias Tees - Keysight Technologies N5221A Service Manual

Repair and Replacement Procedures
Removing and Replacing the A38–A41 Bias Tees
Removing and Replacing the A38–A41 Bias Tees
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— 5/16-inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove assemblies but do not
over-bend them.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Remove the front panel assembly. Refer to
4. Position the analyzer bottom side up.
5. On some 4-port models, it may be necessary to remove the attenuator
6. Disconnect two semirigid cables (item
7. Remove two screws (item
8. Disconnect the wire harness cable (item
9. Move the disconnected semirigid cables out of the way and remove the
Replacement Procedure
1. Reverse the order of the removal procedure.
7-48
Figure 7-21 for this procedure.
Front Panel Assembly" on page
bracket to which the bias tee is attached to facilitate replacing the bias
tee. If this is the case, refer to
Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver
Attenuators" on page
of the location of the wire harness cable ground wire for reinstallation
later.
bias tee from the analyzer. Do not overbend them.
Torque all cable connections to 10 in-lbs.
Remember to place the wire harness cable ground lug on the proper
mounting screw.
"Removing the Covers" on page
"Removing and Replacing the
7-8.
"Removing and Replacing the A34–A37
7-45.
①
) from the bias tee to be removed.
➁
) from the bias tee to be removed. Make note
③
) from the bias tee.
Keysight N5221A/22A Service Guide
7-6.