Keysight Technologies N5247B, Service Manual

Page: 466 / 566

7-22 Keysight N5247B Service Guide
Repair and Replacement Procedures
Removing and Replacing the A18 System Motherboard
7-
15. Remove seven screws (item B) that secure the left side inner bracket to
the chassis.
Refer to Figure 7-10 for the remaining steps in this procedure.
16. Turn the analyzer back over so that the top side is up. Remove two screws
(item j) from each side that secure the midplane bracket to the chassis
inner panels. Lift the midplane bracket out of the analyzer.
17. Remove the three screws (item

) that secure the front bracket to the
chassis left inner panel.
18. Remove six screws (item

) that secure the A18 system motherboard to
the chassis.
19. Slide the A18 system motherboard toward the rear of the analyzer to
release it from the 15 keyhole standoffs (item

) on the chassis.
20. Lift the A18 system motherboard out of the analyzer.
21. Remove the twelve rubber grommets from the A18 system motherboard
guide pins. Keep them for reinstallation on the replacement motherboard.
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 7-92 .