Exchange the DC-UPS DSU to DSU power cable

Before you begin

Icon for electrostatic discharge wrist strapUse approved ESD procedures to prevent damage.

Attention:
  • This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
  • If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
  • If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.
Notes:
  • All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
  • If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.

Remove the DC-UPS DSU to DSU power cable

Procedure

  1. To locate this FRU, do one of the following and then return here and continue to replace the FRU:
    • If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs by using identify indicators. If not, use the location code.
      Note: There might be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
    • Use the location code, which is listed in MAP1245 Finding FRUs by using location codes.
    • If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure as well as the figures in this procedure to locate the proper part to exchange.
  2. Most, but not all, FRUs have identify indicators. Use the blinking amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure and/or FRU.
  3. Disconnect the DSU to DSU power cable at both ends.
    1. There are three separate cables, each carries a different power phase. See Figure 1.
      • E1-J3-1 to E2-J3-1
      • E1-J3-2 to E2-J3-2
      • E1-J3-3 to E2-J3-3
    Figure 1. Location codes for the DC-UPS (Models 961, 96E) (rear)
    Location codes for the DC-UPS (Models 961, 96E) (rear)
  4. Remove the cable retention hardware as needed and then remove the cable.

Install the DC-UPS DSU to DSU power cable

Procedure

  1. Route the new cable and connect it at both ends.
  2. Reinstall the cable retention hardware as needed.
  3. Exit this service information center parts exchange procedure and return to the procedure that sent you here.