Removing And Replacing The A26 Splitter - Keysight Technologies N5247B Service Manual

Repair and Replacement Procedures

Removing and Replacing the A26 Splitter

Removing and Replacing the A26 Splitter
Tools Required
— T-8 TORX driver (set to 6 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— 5/16 inch open-end torque wrench (set to 10 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove the assembly. However, do not
over-bend the semirigid cables.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. Disconnect cable W62 at the A26 splitter connection.
5. Remove cable W63 from between the A26 splitter and the A27 mixer brick.
6. Remove cable W64 from between the A26 splitter and the A28 mixer brick.
7. Remove two screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
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
Keysight N5247B Service Guide
Figure 7-18 for this procedure.
of the analyzer.
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
1
"Removing the Covers" on page

) from the A26 splitter and lift the splitter out
Table 7-2 on page
6-84.
7-6.
7-92.
and "4-Port
7-39