7-58 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Front Panel LED Boards N5242A
Removing and Replacing the Front Panel LED Boards
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)
• 1 inch open-end torque wrench (set to 72 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-18 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 test port couplers. Refer to “Removing and Replacing the A29–A32 Test
Port Couplers” on page 7-38.
3. Remove two screws (item
①
) from the LED board to be removed and remove the LED
board from 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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