Removing And Replacing The A21 Cpu Board Assembly - Keysight Technologies N5224/5A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A21 CPU Board Assembly

Removing and Replacing the A21 CPU Board Assembly
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)
— ESD grounding wrist strap
Removal Procedure
Refer to
1. Disconnect the power cord.
2. It is not necessary to remove the instrument cover(s) to remove the A21
3. Remove six screws (item
4. Grasp the two ejector handles and rotate them outward toward the sides
5. Slide the A21 CPU board assembly out the rear of the analyzer.
6. If the A21 CPU board assembly is being replaced, you must first remove
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 7-10 for this procedure.
CPU board assembly.
the CPU assembly rear panel and two from the ejector handles.
of the analyzer as shown in the illustration. This will disengage the A21
CPU board assembly from the A19 midplane board.
the A55 solid state drive for reinstallation in the new A21 CPU board
assembly. Refer to "Removing and Replacing the A55 Solid State Drive
(SSD)" on page 7-54.
that pertain to this removal procedure. Refer to

) from the A21 CPU board assembly - four from
Table 7-2 on page 7-64.
7-25