Keysight Technologies N5244/5B Service Manual page 568

Repair and Replacement Procedures
Removing and Replacing the A18 System Motherboard
13. Turn the analyzer over so that the bottom side is up and remove the A23
Test Set Motherboard and the A24 IF Mux. Disconnect the two ribbon
cables from the A18 System Motherboard.
14. Remove four screws (item
bracket to the chassis.
15. Remove seven screws (item
the chassis.
16. Turn the analyzer back over so that the top side is up. Remove two screws
(item
inner panels. Lift the midplane bracket out of the analyzer.
17. Remove the three screws (item
chassis left inner panel.
18. Remove three screws (item
to the chassis.
19. Slide the A18 system motherboard toward the rear of the analyzer to
release it from the 15 keyhole standoffs (item
20. Lift the A18 system motherboard out 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
7-28


) from each side that secure the midplane bracket to the chassis
) that secure the bottom of the midplane

) that secure the left side inner bracket to

) that secure the front bracket to the

) that secure the A18 system motherboard

) on the chassis.
Table 7-2 on page
Keysight N5244B/45B Service Guide
7-93.