Removing And Replacing The A42-A45 Bias Tees - Keysight Technologies N5224/5A Service Manual

Repair and Replacement Procedures
Removing and Replacing the A42–A45 Bias Tees
Removing and Replacing the A42–A45 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. Position the analyzer bottom side up.
4. Disconnect two semirigid cables (item
5. Remove two screws (item
6. Disconnect the wire harness cable (item
7. Move the disconnected semirigid cables out of the way and remove the
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
7-52
Figure 7-22 for this procedure.
removed.
of the location of the wire harness cable ground wire for reinstallation
later.
motherboard.
bias tee from the analyzer. It may be necessary to loosen the other end of
the cables to allow them to be moved. 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.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page

) from the bias tee to be

) from the bias tee to be removed. Make note

) from the A23 test set
Table 7-2 on page
Keysight N5224A/25A Service Guide
7-7.
7-64.