Keysight N5227A - Removing and Replacing the Front Panel LED Boards

7-48 Service Guide N5227-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Front Panel LED Boards N5227A
Removing and Replacing the Front Panel LED Boards
Tools Required
• T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
• T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
• 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
• 1 inch open-end torque wrench (torque to 72 in-lb or 8.15 N.m)
• ESD grounding wrist strap
Removal 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 A33–A36 Test Port Couplers” on
page 7-34.
3. Remove two screws from the LED board to be removed and remove the LED board from the analyzer. For
the location of the screws, see Figure 6-36 on page 6-77.
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.