Keysight E5071C ENA Service Manual page 257

Replacement Procedure
RF Switch and Distributor Module Replacement for 4-Port model (T2-SW and A4)
Figure 6-31 RF Switch and Distributor Module Replacement for 4-port model
Replacement Procedure
Step 1. Replace the switch by inverse procedure of removal.
Be careful screw (item 4) and screw (item 5) are different.
Fasten the semi rigid cables using a torque wrench or torque driver set for
replacement.
Keysight E5071C ENA Network Analyzers 257