Removing And Replacing The A37 Reference Mixer Switch - Keysight N5224A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A37 Reference Mixer Switch

Removing and Replacing the A37 Reference Mixer Switch
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 7-19 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 four semirigid cables (item
5. Remove two screws (item
6. Move the disconnected semirigid cables out of the way and lift the A37 reference mixer switch and
mounting bracket out of the analyzer. It may be necessary to loosen the other end of the cables to allow
them to be moved. Do not overbend them.
7. Disconnect the wire harness cable (item
8. Remove two screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
When reinstalling the A37 reference mixer switch into the analyzer, loosely install the two mounting
➁
screws (item ). Connect the four semirigid cables (item
then tighten the mounting screws.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page
7-40
"Removing the Covers" on page
①
) from the A37 reference mixer switch.
➁
) that secure the A37 reference mixer switch to the side of the test set deck.
③
) from the A37 reference mixer switch.
④
) that attach the A37 reference mixer switch to its mounting bracket.
7-56.
PNA Series Microwave Network Analyzers
7-6.
①
) and torque the connectors to 10 in-lbs,
Service Guide N5225-90001
N5224A and N5225A