Keysight N5224B, Руководство по обслуживанию

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Keysight N5224B/25B Service Guide 7-55
Repair and Replacement Procedures
Removing and Replacing the A42–A45 Bias Tees
Removing and Replacing the A42–A45 Bias Tees
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-26 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-7 .
3. Position the analyzer bottom side up.
4. Disconnect two semirigid cables (item

) from the bias tee to be
removed.
5. Remove two screws (item

) from the bias tee to be removed. Make note
of the location of the wire harness cable ground wire for reinstallation
later.
6. Disconnect the wire harness cable (item

) from the A23 test set
motherboard.
7. Move the disconnected semirigid cables out of the way and remove the
bias tee from the analyzer. It may be necessary to loosen the other end of
the cables to allow them to be moved. Do not overbend them.
Replacement Procedure
1. Reverse the order of the removal procedure.
Torque all cable connections to 10 in-lbs.
Remember to place the wire harness cable ground lug on the proper
mounting screw.
2. Perform the post-repair adjustments, verifications, and performance tests
that pertain to this removal procedure. Refer to Table 7-2 on page 7-78 .
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove assemblies but do not
over-bend them.