Keysight Technologies N5244/5B Service Manual page 581

Repair and Replacement Procedures
Removing and Replacing the A24 IF Multiplexer Board
Removing and Replacing the A24 IF Multiplexer Board
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
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. Remove the A23 test set motherboard. Refer to
5. Disconnect the ribbon cable (item
6. Disconnect ALL gray flexible RF cables (item
7. Remove connector hardware (item
8. Remove connector hardware (item
9. Remove four screws (item
10. Remove four screws (item
11. Slide the A24 IF multiplexer board toward the front of the instrument until
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
Keysight N5244B/45B Service Guide
Figure 7-18 for this procedure.
the A23 Test Set Motherboard" on page
multiplexer board.
connector.
stabilizer bracket.
the rear panel connectors are free of the rear panel, then lift the
motherboard and remove it from the analyzer.
Attach the stabilizer bracket to the new A24 IF multiplexer board using the
screws removed from the old one.
Torque rear panel RF connector nuts to 21 in-lbs and PULSE I/O connector
screws to 6 in-lbs.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page
"Removing and Replacing
7-38.

) from the A24 IF multiplexer board.

) from the A24 IF

) from five rear panel RF connectors.

) from the rear panel PULSE I/O

) from the stabilizer bracket and remove the

) from the A24 IF multiplexer board.
Table 7-2 on page
7-8.
7-93.
7-41