Removing And Replacing The A17 Cpu Board Assembly - Keysight N5221A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A17 CPU Board Assembly

Removing and Replacing the A17 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 Figure 7-10 for this procedure.
1. Disconnect the power cord.
2. It is not necessary to remove the instrument cover(s) to remove the A17 CPU board assembly.
3. Remove six screws (item
and two from the ejector handles.
4. Grasp the two ejector handles and rotate them outward toward the sides of the analyzer as shown in the
illustration. This will disengage the A17 CPU board assembly from the A15 midplane board.
5. Slide the A17 CPU board assembly out the rear of the analyzer.
6. If the older 1.6 GHz CPU board is being replaced with the new 2.0 GHz CPU board, a new A51 solid state
drive assembly must also be installed. Refer to
(SSD)" on page 7-46.
If the N5221/22A already had a 2.0 GHz CPU board installed, remove the A51 solid state drive assembly
from the old CPU board and install it in the new CPU board. Refer to
Solid State Drive (SSD)" on page
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page
7-22
①
) from the A17 CPU board assembly; four from the CPU assembly rear panel
"Removing and Replacing the A51 Solid State Drive
7-46.
7-56.
PNA Series Microwave Network Analyzers
"Removing and Replacing the A51
Service Guide N5222-90001
N5221A/22A