Removing And Replacing The A25 Hma26.5 - Keysight N5224A 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 Figure 7-14 for this procedure.
CAUTION 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
end of the cables to allow them to be moved. Do not over-bend them.
6. Remove four screws (item
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 Table 7-2 on page
7-30
"Removing the Covers" on page
①
) from the A25 HMA26.5 assembly.
➁
) from the A25 HMA26.5. It may be necessary to loosen the other
③
) that hold the A25 HMA26.5 to the chassis side panel.
7-56.
PNA Series Microwave Network Analyzers
N5224A and N5225A
7-6.
Service Guide N5225-90001