Keysight N5227A - Removing and Replacing the A29 -A32 Receiver Couplers and Receiver Coupler Mounting Brackets

7-32 Service Guide N5227-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A29 –A32 Receiver Couplers and Receiver Coupler Mounting Brackets N5227A
Removing and Replacing the A29 –A32 Receiver Couplers and Receiver
Coupler Mounting Brackets
Tools Required
• T-6 TORX driver (torque to 4 in-lb or 0.45 N.m)
• T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
• 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-10 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 outer cover. Refer to “Removing the Covers” on page 7-6.
3. Position the analyzer bottom side up.
4. Disconnect three semirigid cables (item
①
) from the receiver coupler to be replaced.
5. Remove three screws (item
➁) from the mounting bracket of the receiver coupler to be replaced.
6. Move the disconnected semirigid cables out of the way and lift the receiver coupler mounting bracket,
with the receiver coupler attached, out of the analyzer. It may be necessary to loosen the connector at
the other end of some of the semirigid cables to allow them to be moved enough.
7. Remove four screws that attach the receiver coupler to be replaced to the receiver coupler mounting
bracket, and remove the receiver coupler from the bracket.
Replacement Procedure
1. Reverse the order of the removal procedure.
Orient the position of the receiver couplers and brackets as shown in Figure 7-11.
Torque all RF connectors to 10 in-lbs.
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.