Keysight Technologies N5247B Service Manual page 522

Repair and Replacement Procedures
Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board
11. Disconnect the ribbon cable (item
Figure 7-41 on page
Figure 7-41 A70 LFE Board Removal (N5291-60001, 0515-0665 (x2)). (A75 LFE Board
(N5291-60005) Removal is Similar.)
12. Remove the two screws from the LFE board (item
Refer to
13. Lift the LFE board (N5291-60001) and remove it from the analyzer. Refer
to
Replacement Procedure
1. Reverse the order of the removal procedure.
Attach the new A70/A75 LFE board to the standoffs using the screws
removed from the old one.
2. Perform the post-repair adjustments, verifications, and performance tests
that pertain to this removal procedure. Refer to
7-78
7-78.
Figure 7-41 on page
Figure 7-41 on page 7-78.

) from the A70 LFE board. Refer to

7-78.
Table 7-2 on page
Keysight N5247B Service Guide
). Save for reuse.
7-92.