Attenuators - Keysight Technologies N5224A Service Manual

Repair and Replacement Procedures
Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver

Attenuators

Removing and Replacing the A38–A41 Source Attenuators and the
A46–A49 Receiver Attenuators
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
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.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. Disconnect the ribbon cable (item
5. Disconnect two semirigid cables (item
6. Remove three screws (item
7. Move the disconnected semirigid cables out of the way and lift the
8. Remove two screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
Keysight N5224A/25A Service Guide
Figure 7-20 for this procedure.
removed. It may be necessary to remove additional cables to remove the
attenuator bracket. If so, note the location and orientation of each for
reinstallation later.
attenuator brackets to the test set deck, or remove two screws (item
that secure A47 and A48 receiver attenuator brackets or all source
attenuator brackets to the test set deck.
attenuator bracket out of the analyzer, with the attenuator attached. It
may be necessary to loosen the other end of the cables to allow them to
be moved. Do not overbend them.
from the mounting bracket.
Torque all cable connections to 10 in-lbs.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page
①
) from each attenuator to be removed.
➁
) from each attenuator to be
③
) that secure A46 and A49 receiver
④
) to remove the attenuator to be replaced,
Table 7-2 on page
7-6.
③
)
7-59.
7-45