7-28 Service Guide N5230-90024
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A18 MA 26.5 N5230C
Removing and Replacing the A18 MA 26.5
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 7-11 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. With a 5/16 inch torque wrench, disconnect the semirigid cables (item
①
) from the A18 MA 26.5.
4. Disconnect the ribbon cable (item
➁) at the A18 MA 26.5.
5. With a T-10 TORX driver, remove the mounting screws (item
③
) from the A18 MA 26.5.
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. Remove the A18 MA 26.5 from the analyzer. Observe the
CAUTION above.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page 7-54.
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