7-62 Service Guide E8361-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Midweb and the B1 Fan E8361A
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 7-10.
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 A27–A30 first converters (mixers). This
is necessary to gain access to one of the midweb mounting screws. Refer to “Removing
and Replacing the A27, A28, A29, and A30 First Converters (Mixers) and Mixer Bias
Board” on page 7-48.
5. Remove the A13 (Option 080) frequency offset receiver assembly, if present. Refer to
“Removing and Replacing the A13 Frequency Offset Receiver Assembly” on page 7-24.
6. Remove the A12 source 20. Refer to “Removing and Replacing the A12 Source 20” on
page 7-22.
7. Remove the A11 phase lock board. Refer to “Removing and Replacing the A11 Phase
Lock Board” on page 7-20.
8. Remove the A4 power supply assembly. Refer to “Removing and Replacing the A4 Power
Supply Assembly” on page 7-16.
9. Remove the card cage boards (A6, A8, and A10). Remove A9 (Option 080), if present.
Refer to “Removing and Replacing the A6, A8, A9, and A10 Boards” on page 7-18.
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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