7-32 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A16 Test Set Motherboard E8362C, E8363C, E8364C
Removing and Replacing the A16 Test Set 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 7-13 for this procedure.
1. Disconnect the power cord.
2. Remove the outer covers. Refer to “Removing the Covers” on page 7-6. Position the analyzer bottom side
up and raise the receiver deck as shown. Refer to “Raising and Removing the Receiver Deck” on page
7-8 if necessary.
3. Remove the A21 SOMA 50 (E8363C and E8364C) or RF cable W1 (E8362C). Refer to “Removing and
Replacing the A21 SOMA 50 (E8363C and E8364C Only)” on page 7-42.
4. Remove the A41 hard disk drive. Refer to “Removing and Replacing the A41 Hard Disk Drive (HDD)” on
page 7-62.
5. Remove the A41 hard disk drive shield by loosening two attachment screws using a T-10 TORX driver.
These screws are accessible through holes in the side of the chassis.
6. Disconnect the ribbon cables (item
①) from the A16 test set motherboard.
7. Disconnect the wrapped-wire cables (item
➁) from the A16 test set motherboard.
8. Release the flexible RF cables from the cable clamp (item
③). Release the receiver deck by pulling the
latch pin (item
④), and move the entire receiver deck out of the way, with the cables attached.
9. With a T-10 TORX driver, remove the following screws:
•Nine screws (item
⑤) from the rear panel.
•Four screws (item
⑥) from the A16 test set motherboard.
10. Slide the A16 test set motherboard toward the front of the instrument to release the locking pins (item
⑦), then lift the motherboard and remove it from the analyzer.
Replacement Procedure
1. Reverse the order of the removal procedure.
Note: When replacing the attachment screws, install the four screws in the motherboard first, leaving
them loose until the nine rear panel screws have been tightened.
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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