Learn how to replace the RMX-4122 power supply (part number 784763-01) in the ETX-1620x.

Equipment

  • Torque driver, N · m or lb · in.
    • #2 Phillips head bit
  • Torque wrench, N · m or lb · in.
    • 8 mm socket wrench bit
  • 8 mm wrench
  • Flathead screwdriver
  • #1 Phillips head screwdriver
  • Tray for loose fastening hardware

Torque the fasteners to the following specifications:

  • M5 hex head: 2.49 N · m (22.0 lb · in.)
  • 10-32 pan head: 3.16 N · m (27.9 lb · in.)
  1. Follow all Before Maintenance or Repair procedures.
  2. While facing the mass interconnect, unlock the door above the mass interconnect and pull the door open.
  3. Remove the safety cover from the output terminals of the RMX-4122 using the #1 Phillips head screwdriver.
  4. Loosen and remove the output terminal M5 nuts and bolts using the 8 mm wrench.
  5. Note where each cable is connected to the back of the RMX-4122, then remove all cables from back of the RMX-4122.
  6. While facing the monitor and keyboard, complete the following steps:
    1. Tilt the monitor down.
    2. Unfasten the 10-32 screws securing the top filler panel to the rack and set aside the filler panel.
  7. Locate the S-brackets holding the front of the RMX-4122 to the vertical rack rails.
  8. Unfasten the 10-32 screws from the rack rail mounts using the #2 Phillips head bit.
  9. Using the rails that support the RMX-4122, pull the RMX-4122 forward through the front of the rack to remove it.
    If necessary, remove the monitor from the monitor mount to facilitate removal of the RMX-4122.
Follow the removal instructions in reverse order with a new RMX-4122.
Note Align the RMX-4122 with Rack U 37.
Note Use the L-brackets to rest the power supply during installation.