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Repair and Replacement Procedures
Removing and Replacing the A14 System Motherboard
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 7-10
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 A12 source 20. Refer to
page
7-22.
5. Remove the A11 phase lock board. Refer to
Lock Board" on page
6. Remove the A4 power supply assembly. Refer to
Power Supply Assembly" on page
7. Remove the card cage boards (A6, A8, and A10). Refer to
A6, A8, and A10 Boards" on page
8. Remove the A15 CPU board. Refer to
page
7-26.
9. Remove the Midweb. Refer to
on page
7-67.
10. Disconnect the A1 front panel ribbon cable (item
②
cable (item
), and the A16 test set motherboard ribbon cable (item
system motherboard.
11. Lift the tab at the rear of the A40 floppy disk drive enclosure and remove the rear
enclosure cover.
12. Remove the four screws (item
13. 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
7-24
for this procedure.
7-10.
"Removing and Replacing the A12 Source 20" on
7-20.
7-16.
7-18.
"Removing and Replacing the A15 CPU Board" on
"Removing and Replacing the Midweb and the B1 Fan"
④
) that secure the A14 system motherboard.
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 A11 Phase
"Removing and Replacing the A4
"Removing and Replacing the
①
), the A40 floppy disk drive ribbon
7-70.
Service Guide E8364-90001
E8362A, E8363A, E8364A
7-6.
③
) from the A14
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Troubleshooting
