Dell PowerEdge Rack Enclosure 2420 - Manual (Page 8)

Cable Routing Procedures for the Dell PowerEdge R820 System
8
Section 2: Replacing a power supply on a PowerEdge R820
system with a CMA
2.1. Replacing a power supply with a left-side mounted CMA
1. Swing the CMA to its service position as described in the CMA Installation Instructions provided
with the CMA kit.
2. Remove the tray from underneath the CMA as described in the CMA Installation Instructions.
3. Disengage the strain relief and disconnect the power cord from the power supply.
4. Replace the power supply.
5. Plug in the power cord, re-engage the strain relief, replace the CMA support tray, and return the
CMA to the closed (retracted) position.
2.2. Replacing a power supply with a right-side mounted CMA
1. If the innermost power supply must be replaced, then follow the steps described in Section 2.1. If
the outermost power supply must be replaced, follow the steps described below.
2. Swing the CMA to its service position as described in the CMA Installation Instructions provided
with the CMA kit.
3. Remove the tray from underneath the CMA as described in the CMA Installation Instructions.
4. Disengage the strain relief and disconnect the power cord from the power supply.
5. Disconnect the CMA attachment housings from the brackets on the rails as shown in Figure 7.
6. Detach the inner CMA bracket from the rail by pushing on the end of the lock spring and lifting the
bracket up and to the left until it clears the standoffs on the rail.
7. While supporting the CMA with one hand, remove and replace the outer power supply with the
other hand as shown in Figure 8.
8. Reinstall the inner CMA bracket to the rail and reconnect the CMA to the brackets.
9. Plug in the power cord, re-engage the strain relief, replace the CMA support tray, and return the
CMA to the closed (retracted) position.