Keysight Technologies N5247B Service Manual page 463

Repair and Replacement Procedures
Removing and Replacing the A4–A17 Boards
4. Instructions for A4, A7, A8, A12, A13, A14, A15, A16, and A17 boards:
a. Remove all cables connected to the top of the board to be removed.
b. Lift the two extractors (item
c. Before removing the board, check the bottom of the board for any
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. If replacing a doubler board, make sure the new
board has loads connected to the same ports as were used on the old
board. This may require moving a load from the old board to the new board
or removing the load from the new board.
When replacing the A5 or A10 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
The A4, A15, and A17 synthesizer boards will not perform correctly and
will cause the PNA to display errors until the Synthesizer Bandwidth
Adjustment and the EE Default Adjustment are completed, as per
7-2 on page
If you have a new A15 version 7 synthesizer assembly installed, the A15
assembly will not perform correctly and will cause the PNA to display
errors until the EE Default Adjustment synthesizer adjustments are
completed, as per
Keysight N5247B Service Guide
Note the location of each cable for reinstallation.
lift the board.
attached cables.
7-92.
Table 7-2 on page

), one at each end of the board, and
Table 7-2 on page
7-92.
7-92.
Table
7-19