Follow these steps to replace the side fan assembly for the PXIe-1081 chassis.

Tools required:
  • Phillips screwdriver
  • Torque screwdriver
Safety precautions:
  • Verify that there is adequate clearance to the side of the chassis.
  • Disconnect the power cable from the power supply on the back of the chassis. Wait at least 30 seconds for the internal power to dissipate.
Use the following steps to replace the side fan assembly.
  1. Remove the four #4-40 mounting screws from the side fan cover.
  2. Remove the side fan cover from the chassis.
  3. Remove the two #2-56 mounting screws from the side fan assembly.
  4. Locate the fan harness in the internal chassis cavity and disconnect it from the chassis receptacle.
    Notice Use caution to avoid damaging the internal wire harness.
  5. Pull the side fan assembly straight out of the chassis.
  6. Plug the new side fan assembly into the internal chassis fan receptacle.
  7. Set the fan assembly into the chassis side fan cavity.
    Notice Use caution when placing the wire harness to avoid damage.
  8. Tighten the two #2-56 mounting screws. To meet the shock and the vibration specifications listed in the PXIe-1081 Specifications, tighten the #2-56 screws to 0.6 N·m (5.3 lb·in.).
  9. Use the side fan cutout to pull extra cable clear of the chassis side panels.
  10. Place all extra cable into the chassis side fan cavity.
  11. Tighten the four #4-40 side fan cover mounting screws. To meet the shock and the vibration specifications listed in the PXIe-1081 Specifications, tighten the #4-40 screws to 0.8 N·m (7 lb·in.).
Figure 25. PXIe-1081 Replacing Side Fan Assembly

Isometric front view of the PXIe-1081 chassis with the side fan assembly shown in exploded view. Dashed lines indicate screw paths. Callouts identify: (1) Chassis Side Fan Cavity, (2) Side Fan Assembly, (3) Side Fan Cover, and (4) Side Fan Cover Mounting Screws (4x).

  1. Chassis Side Fan Cavity
  2. Side Fan Assembly
  3. Side Fan Cover
  4. Side Fan Cover Mounting Screws (4x)