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Repair and Replacement Procedures
Removing and Replacing the A37 Reference Mixer Switch
Removing and Replacing the A37 Reference Mixer Switch
Tools Required
— T-10 TORX driver (set to 9 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 four semirigid cables (item
5. Remove two screws (item
6. Move the disconnected semirigid cables out of the way and lift the A37
7. Disconnect the wire harness cable (item
8. Remove two screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
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
7-48
Figure 7-23
for this procedure.
switch.
to the side of the test set deck.
reference mixer switch and mounting bracket out of the analyzer. It may
be necessary to loosen the connector at the other end of some of the
semirigid cables to allow them to be moved enough.
switch.
to its mounting bracket.
and for details on A26 splitter and cabling, refer to your
"2-Port Configurations, Serial Number Prefixes <6021" on page 6-31
"Removing the Covers" on page
) from the A37 reference mixer
) that secure the A37 reference mixer switch
) from the A37 reference mixer
) that attach the A37 reference mixer switch
6-84.
Keysight N5247B Service Guide
7-6.
and
"4-Port
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Troubleshooting
