7-26 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A14 System Motherboard E8362C, E8363C, E8364C
Removing and Replacing the A14 System Motherboard
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16-inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-11 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 7-10.
4. Remove the A12 source 20. Refer to “Removing and Replacing the A12 Source 20” on page 7-22.
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 A11 phase lock board. Refer to “Removing and Replacing the A11 Phase Lock Board” on
page 7-20.
7. Remove the A4 power supply assembly. Refer to “Removing and Replacing the A4 Power Supply
Assembly” on page 7-16.
8. 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.
9. Remove the A15 CPU board. Refer to “Removing and Replacing the A15 CPU Board” on page 7-28.
10. Remove the Midweb. Refer to “Removing and Replacing the Midweb and the B1 Fan” on page 7-76.
11. Remove the ribbon cable clamp (item
⑥
) by removing the attachment screw (item
⑤
). Set the cable
clamp aside for reinstallation later.
12. Disconnect the front panel ribbon cable (item
①
), the test set motherboard ribbon cable (item ➁), and
the USB hub assembly cable (item
③
) from the A14 system motherboard.
13. Remove the remaining three screws (item
④
) that secure the A14 system motherboard.
14. Lift the A14 system motherboard out of the analyzer.
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 7-82.
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