7-28 Service Guide E8364-90026
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A15 CPU Board E8362B, E8363B, E8364B
Removing and Replacing the A15 CPU Board
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-12 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. Disconnect the hard disk drive assembly (HDDA) ribbon cable and interface board from
the A15 CPU board by removing the two screws (item
①).
4. Disengage the A6 SPAM board from the A15 CPU board by performing the following
steps.
a. Lift the two extractors located at each end of the board.
b. While holding onto the extractors, lift the board halfway out of the slot.
c. Let the extractors drop to their normal position.
d. Lower the board into the slot.
The board should now rest above its normal seated position.
5. With a T-10 TORX driver, remove the 14 screws (item
②) from the rear panel of the
A15 CPU board.
6. Gently pull on the finger grip (item
③) to disengage the A15 CPU board from the
analyzer.
7. Slide the A15 CPU board 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 7-80.
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