Disconnect the power cords from both power supplies.
Figure 89: Remove power supply cords
Legend
1 Power supply cords
2 Power supply handle
Tip:
Always notify affected users that the
Controller
will be powered off.
Disconnect Controller Cabling
Disconnect all data cables from the Controller.
Note:
All cables must be disconnected from the Controller and labeled
such that they can be reconnected accurately to the Controller after the
replacement procedure is complete. Reconnecting cables to the incorrect
position might impact the performance of the Controller or result in a
complete loss of functionality.
Note:
Service the Controller components from the front of the Controller
while the Controller is in service position.
Note:
Do not lean on or place any weight on the Controller while the
Controller is in the service position.
Open the Controller Top Cover
1 Fully loosen the two captive thumb screws at the back of the top cover
using the Phillips number 2 screwdriver, if necessary.
Controller Replacement Procedures
125
