7-28 Keysight N5224A/25A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A23 Test Set Motherboard
7-
Removing and Replacing the A23 Test Set Motherboard
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— 5/8 inch nutsetter (torque to 21 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer cover. Refer to
“Removing the Covers” on page 7-6
3.
Position the analyzer bottom side up.
4.
Disconnect ALL ribbon cables (item
①
) and ALL wire harnesses (item
➁
)
from the A23 test set motherboard.
5.
Remove connector hardware (item
③
) from 11 rear panel BNC connectors.
6.
Remove 10 screws (item
⑤
) from the A23 test set motherboard.
7.
Slide the A23 test set motherboard toward the front of the instrument until
the rear panel BNC connectors are free of the rear panel, then lift the
motherboard and remove it from 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
.
