Agilent Technologies N5241A, Service Manual

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7-14 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A4–A13 Boards N5241A/42A
Removing and Replacing the A4–A13 Boards
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 7-6 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. A5 and A8 source boards:
a. Removal of the source boards is best done with the analyzer placed on its left side, as
shown in Figure 7-6 , so that both the bottom and top of the analyzer are accessible.
b. On the bottom side of the analyzer, on the source board to be removed, disconnect the
long cables (item
①
) from the short cables attached to the source board. The short
cables will remain attached to the source board as it is removed from the analyzer.
c. On the top side of the analyzer, remove two screws (item
②
), one at each end of the
board, from the source board to be removed.
d. Lift the two extractors (item
③
), one at each end of the board, and lift the board out
of the chassis.
4. A4, A7, A10, A11, A12, and A13 boards:
a. Remove all cables connected to the top of the board to be removed. Note the location
of each cable for reinstallation.
b. Lift the two extractors (item
③
), one at each end of the board, and lift the board.
c. Before removing the board completely, check the bottom of the board for any
attached cables.
Replacement Procedure
1. Reverse the order of the removal procedure.
Remember to connect any necessary cables to the bottom of the board before
reinstalling it.
When replacing the A5 or A8 source board, remove the semirigid cables attached to the
bottom of the old board and attach them to the bottom of the new board. Be sure to
orient these cables the same as they were on the old board.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain
to this removal procedure. Refer to Table 7-2 on page 7-68 .