454 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
Assembly Replacement Procedures
Fan Assembly
Replacement
1. Refer to Figure 15-100. Place the fan bracket next to the chassis and plug
in the fan wires into the rear mother board.
2. For Serial Number Prefix < 5605 Options 508, 513, 526:
— Refer to Figure 15-98. Place the fan bracket into position taking care
to avoid pinching the fan wires between the fan bracket and the
chassis. Replace the nine screws (1) (0515-0372) and the two
screws (2) (0515-1946). Torque all screws to 9 inch-pounds.
3. For Serial Number Prefix ≥ 5605 and All Options 544 and 550:
— Refer to Figure 15-99. Place the fan bracket into position taking care
to avoid pinching the fan wires between the fan bracket and the
chassis. Replace the seven screws (1) (0515-0372) and the six
screws (2) (0515-1946) that attach the fan bracket (3) to the
chassis. Torque all screws to 9 inch-pounds.
4. Replace the front frame. Refer to the “Front Frame Assembly” replacement
procedure.
5. Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.
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