Removing And Replacing The Fans - Agilent Technologies N5242A Service Manual

Repair and Replacement Procedures

Removing and Replacing the Fans

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
1. Disconnect the power cord.
2. Remove the outer and inner covers. Refer to
3. Remove the front panel assembly. Refer to
Assembly" on page
4. Remove the power supply bracket. It is not necessary to remove the entire power
supply, just the power supply bracket. Refer to
Supply Assembly" on page
5. Remove five screws (item
6. Remove three screws (item
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
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
illustration.
c. Pull out the rivet completely (as shown by (item
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
7-60
for this procedure.
7-8.
7-20.
①
) that attach the fan bracket to the chassis.
②
) that attach the rear panel to the fan bracket.
Table 7-2 on page
PNA Series Microwave Network Analyzers
"Removing the Covers" on page
"Removing and Replacing the Front Panel
"Removing and Replacing the A16 Power
⑤
) in the illustration) to release the
7-64.
Service Guide N5242-90001
N5242A
7-6.
③
).
④
) in the