422 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
Assembly Replacement Procedures
Rear Panel
Replacement
1. Refer to Figure 15-71. Install the EXT REF IN connector and the AUX IF
OUT connector through the rear panel ports. Use the lock washers and
nuts to secure. Use a 9/16 inch nut driver on the EXT REF IN connector
and torque to 21 inch-pounds. Use a 5/16 inch nut driver on the AUX IF
OUT connector and torque to 10 inch-pounds. Reinstall the rear panel into
position in the chassis.
2. For Serial Number Prefix < 5616:
— Refer to Figure 15-71. Replace the twenty-one screws (1)
(0515-0372) and the four screws (2) (0515-1946). Torque all
screws to 9 inch-pounds.
3. For Serial Number Prefix ≥ 5616:
— Refer to Figure 15-72. Replace the fifteen screws (1) (0515-0372)
and the four screws (2) (0515-1946). Torque to 9 inch-pounds.
— Replace the eight screws (3) (0515-0433). Torque to
21 inch-pounds.
4. Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.
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