7-24 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A18 GPIB Board N5242A
Removing and Replacing the A18 GPIB Board
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 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 and inner covers. Refer to “Removing the Covers” on page 7-6.
3. Remove the A16 power supply assembly. Refer to “Removing and Replacing the A16
Power Supply Assembly” on page 7-20.
4. Remove the A17 CPU board assembly. Refer to “Removing and Replacing the A17 CPU
Board Assembly” on page 7-22.
5. Remove the rear panel. Refer to “Removing and Replacing the Rear Panel” on page
7-56.
6. Slide the A18 GPIB board out the rear of the analyzer.
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 7-64.
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