7-32 Keysight N5224A/25A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A25 HMA26.5
7-
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
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer cover. Refer to
“Removing the Covers” on page 7-6
3.
Position the analyzer bottom side up.
4.
Disconnect the ribbon cable (item
①
) from the A25 HMA26.5 assembly.
5.
Disconnect semirigid cables (item
➁
) from the A25 HMA26.5. It may be
necessary to loosen the other end of the cables to allow them to be
moved. Do not over-bend them.
6.
Remove four screws (item
③
) that hold the A25 HMA26.5 to the chassis
side panel.
Replacement Procedure
1.
Reverse the order of the removal procedure.
Torque all RF cable connectors to 10 in-lbs.
2.
Perform the post-repair adjustments, verifications, and performance tests
that pertain to this 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.
