Keysight Technologies N5247B Service Manual page 486

Repair and Replacement Procedures
Removing and Replacing the A27 and A28 Mixer Bricks
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
Figure 7-19 A27 and A28 Mixer Bricks Removal
1. The A26 splitter (5067-4086) and N5247-20111, N5245-20022, N5245-20023, and N5247-20110 cables are only used
with a legacy HMA26.5 p/n: 5087-7765. The N5240-20125, N5247-20184 and N5247-20185 cables are used only with the
new N5240-60101 HMA-26.5. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chap-
ter 7 Repairs and Figure 7-17 on page 38
option-model in Chapter 6
Configuration, Serial Number Prefixes <6021" on page
7-42
If replacing the A28 mixer brick, remember to install the W58 2.4 mm cap,
removed from the old mixer brick, onto the new mixer brick in the same
location.
Torque all RF cable connections to 10 in-lbs.
that pertain to this removal procedure. Refer to
and for details on A26 splitter and cabling, refer to your
"2-Port Configurations, Serial Number Prefixes <6021" on page 6-31
Table 7-2 on page
1
6-84.
Keysight N5247B Service Guide
7-92.
and "4-Port