Removing And Replacing The A17 Cpu Board Assembly - Agilent Technologies N5242A 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 (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-10
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
assembly rear panel 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 hard disk drive assembly must also be installed. Refer to
Replacing the A51 Hard Disk Drive (HDDA)" on page
If the N5241/42A already had a 2.0 GHz CPU board installed, remove the A51 hard disk
drive assembly from the old CPU board and install it in the new CPU board. Refer to
"Removing and Replacing the A51 Hard Disk Drive (HDDA)" on page
Replacement Procedure
1. Reverse the order of the removal procedure.
2. If a new Certificate of Authenticity (license) label is supplied with your new A17 CPU
board assembly, adhere it to the outer cover in the location specified in
page 7-7.
3. Perform the post-repair adjustments, verifications, and performance tests that pertain
to this removal procedure. Refer to
7-22
for this procedure.
①
) from the A17 CPU board assembly; four from the CPU
Table 7-2 on page
PNA Series Microwave Network Analyzers
"Removing and
7-48.
7-48.
Figure 7-1 on
7-68.
Service Guide N5242-90001
N5241A/42A