Removing And Replacing The A25 Hma26.5 - Keysight Technologies N5224/5A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A25 HMA26.5

Removing and Replacing the A25 HMA26.5
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 the ribbon cable (item
5. Disconnect semirigid cables (item
6. Remove four screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and
N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which
HMA26.5 assembly your PNA has installed, refer to Chapter 7 and
on A26 splitter and cabling, refer to your option-model in Chapter 6
Option Set:" on page
7-34
Figure 7-14 for this procedure.
necessary to loosen the other end of the cables to allow them to be
moved. Do not over-bend them.
side panel.
Torque all RF cable connectors to 10 in-lbs.
that pertain to this removal procedure. Refer to
8.
1
"Removing the Covers" on page

) from the A25 HMA26.5 assembly.

) from the A25 HMA26.5. It may be

) that hold the A25 HMA26.5 to the chassis
Table 7-2 on page
Figure 7-15 on page 7-36
"Bottom Assemblies and Cables by
Keysight N5224A/25A Service Guide
7-7.
7-64.
and for details