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Repair and Replacement Procedures
Removing and Replacing the A33 Reference Mixer Switch
Removing and Replacing the A33 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
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 three screws (item
6. Move the disconnected semirigid cables out of the way and lift the A33
7. Disconnect the wire harness cable (item
8. Remove four screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
Keysight N5221A/22A Service Guide
Figure 7-19
for this procedure.
switch.
to the side of the test set deck.
reference mixer switch and mounting bracket out of the analyzer.
switch.
to its mounting bracket.
When reinstalling the A33 reference mixer switch into the analyzer, loosely
install the three mounting screws (item
①
cables (item
) and torque the connectors to 10 in-lbs, then tighten the
three mounting screws.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page
①
) from the A33 reference mixer
➁
) that secure the A33 reference mixer switch
③
) from the A33 reference mixer
④
) that attach the A33 reference mixer switch
➁
). Connect the four semirigid
Table 7-2 on page
7-6.
7-60.
7-43
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