7-40 Service Guide N5230-90014
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Midweb and the B1 Fan N5230A
Removing and Replacing the Midweb and the B1 Fan
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
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to “Removing and Replacing the Front Panel
Assembly” on page 7-8.
3. Remove the outer and inner covers. Refer to “Removing the Covers” on page 7-6.
4. On the bottom side of the analyzer, remove the A25 step attenuator if one is present
(active configuration only). This is necessary to gain access to one of the midweb
mounting screws. Refer to “Removing and Replacing the A25 and A26 60-dB Source
Step Attenuators (Option 1E1)” on page 7-30.
5. On the bottom side of the analyzer, remove the A19 SSLAM. This is necessary to gain
access to one of the midweb mounting screws. Refer to “Removing and Replacing the
A19 SSLAM” on page 7-24.
6. Remove the A4 power supply assembly. Refer to “Removing and Replacing the A4 Power
Supply Assembly” on page 7-14.
7. Remove the card cage boards (A5 through A10). Refer to “Removing and Replacing the
A5 through A10 Boards” on page 7-16.
NOTE
This procedure has two parts: removing the midweb and removing the fan
from the midweb. You must remove the midweb before removing the fan.
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