Cable Routing Procedures for Dell PowerEdge R620 Systems8Section 2: Replacing a power supply on a PowerEdge R620system with a CMA2.1. Replacing a power supply with a left-side mounted CMA1. Swing the CMA to its service position as described in the CMA Installation Instructions providedwith 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 theCMA to the closed (retracted) position.2.2. Replacing a power supply with a right-side mounted CMA1. If the innermost power supply must be replaced, then follow the steps described in Section 2.1. Ifthe 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 providedwith 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 both 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 thebracket 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 theother 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 theCMA to the closed (retracted) position.