Agilent Technologies N5242A - Removing and Replacing the Fans

7-60 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Fans N5242A
Removing and Replacing the Fans
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• Pozidriv screw driver
• 5/16 inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-28 for this procedure.
1. Disconnect the power cord.
2. Remove the outer and inner covers. Refer to “Removing the Covers” on page 7-6.
3. Remove the front panel assembly. Refer to “Removing and Replacing the Front Panel
Assembly” on page 7-8.
4. Remove the power supply bracket. It is not necessary to remove the entire power
supply, just the power supply bracket. Refer to “Removing and Replacing the A16 Power
Supply Assembly” on page 7-20.
5. Remove five screws (item
①
) that attach the fan bracket to the chassis.
6. Remove three screws (item
②
) that attach the rear panel to the fan bracket.
7. Raise the fan bracket out of the analyzer just enough to access the fan cables.
Disconnect the fan cables from the A14 system motherboard connectors (item
③
).
8. Remove the fan bracket and fans from the analyzer.
9. To remove a fan or fan guard from the fan bracket:
a. Before removing a fan or fan guard, note the orientation of each fan and fan guard
for reinstallation.
b. Pull up the center pin of each of the fan rivets as shown by (item
④
) in the
illustration.
c. Pull out the rivet completely (as shown by (item
⑤
) in the illustration) to release the
fan and fan guard.
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 7-64.