Agilent Technologies N5241A, Руководство по обслуживанию

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7-40 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A33 Reference Mixer Switch N5241A/42A
Removing and Replacing the A33 Reference Mixer Switch
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-15 TORX driver (set to 14 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16 inch open-end torque wrench (set to 10 in-lb)
• 1 inch open-end torque wrench (set to 72 in-lb)
• 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 the assembly. However, do not over-bend
the semirigid cables.
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 four semirigid cables (item
①
) from the A33 reference mixer switch.
5. Remove three screws (item
②
) that secure the A33 reference mixer switch to the side of
the test set deck.
6. Move the disconnected semirigid cables out of the way and lift the A33 reference mixer
switch and mounting bracket out of the analyzer.
7. Disconnect the wire harness cable (item
③
) from the A33 reference mixer switch.
8. Remove four screws (item
④
) that attach the A33 reference mixer switch to its
mounting bracket.
Replacement Procedure
1. Reverse the order of the removal procedure.
When reinstalling the A33 reference mixer switch into the analyzer, loosely install the
three mounting screws (item
②
). Connect the four semirigid cables (item
①
) and torque
the connectors to 10 in-lbs, then tighten the three 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 7-68 .