7-30 Service Guide N5230-90014
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A25 and A26 60-dB Source Step Attenuators (Option 1E1) N5230A
Removing and Replacing the A25 and A26 60-dB Source
Step Attenuators (Option 1E1)
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16-inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-13 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6. Position the
analyzer bottom side up.
3. Disconnect the ribbon cable (item
①
) from the step attenuator.
4. Using a 5/16-inch wrench, disconnect the semi-rigid cables (item
②
) from the step
attenuator.
5. With a T-10 TORX driver, loosen the mounting screws (item
③
) in the analyzer side
frame. It is not necessary to completely remove the mounting screws.
CAUTION
Be careful not to damage the center pins of the semirigid cables. Some flexing
of the cables is necessary to remove the assembly. Do not over-bend them.
6. Slide the attenuator upward to release the mounting screws and remove the attenuator
from the analyzer. Observe the
CAUTION above.
Replacement Procedure
1. Remove the mounting screws from the defective attenuator and insert them loosely into
the new attenuator.
2. Reverse the order of the removal procedure.
3. Perform the post-repair adjustments, verifications, and performance tests that pertain
to this removal procedure. Refer to Table 7-2 on page 7-45.
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