Keysight N5227B, Service Manual

Page: 379 / 415

Keysight N5227B Service Guide 7-61
Repair and Replacement Procedures
Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board
11. Disconnect the ribbon cable (item
①
) from the A70 LFE board. Refer to
Figure 7-32 on page 7-61 .
Figure 7-32 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
➁
). Save for reuse.
Refer to Figure 7-32 on page 7-61 .
13. Lift the LFE board (N5291-60001) and remove it from the analyzer. Refer
to Figure 7-32 on page 7-61 .
Replacement Procedure
1. Reverse the order of the removal procedure.
Attach the new A70 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 Table 7-2 on page 7-74 .