Keysight N5227B Service Guide 7-35
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
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 cable W61 from the A25 HMA26.5.
6.
Remove cable W62 from between the A25 HMA26.5 and the A26 splitter.
7.
Remove four screws (item
➁
) that hold the A25 HMA26.5 on 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 the assembly. However, do not
over-bend the semirigid cables.