Replacing a power supply in a disk shelf

Replacing a power supply in a disk shelf consists of the following procedures:

When replacing the power supply on your disk shelf, observe the following rules:

You do not need to turn off the power when you replace one power supply.
If you are replacing both power supplies in the same disk shelf, replace them one at a time to avoid powering down the disk shelf.

To remove a power supply, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	If you have a disk shelf with...	Then...
	An AC power supply	Turn off the switch on the power supply that you are replacing. Lift up the clip lock and unplug the power cord from the storage appliance power supply.
	A DC power supply	Turn off and unplug the cable to the power supply you are replacing from the power source. Using a #2 Phillips screwdriver, remove and save the screws securing the connections to the power supply in the following order: For positive ground installations: first negative (-), then positive (+), then ground ( ) For negative ground installations: first positive (+), then negative (-), then ground ( )
3	If the CAM mechanism on the power supply is...	Then...
	In the middle of the rear of the unit	Using the thumb and index finger of both hands, press the CAM mechanism levers in the middle of the power supply to release it.
	The following figure shows how to release the CAM mechanism.
	At the top of the rear of the unit	Using your thumb and index finger, press the CAM mechanism levers toward each other to release the power supply handle.
	The following figure shows how to press the levers on the CAM mechanism and release the power supply handle.
4	Use the handle to pull the power supply out of the disk shelf. WARNING When removing a power supply, always use two hands to support its weight.

To install a power supply in a disk shelf, complete the following steps.

Caution
Do not use excessive force when sliding the power supply into the disk shelf. You can damage the connector.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	If the power supply CAM mechanism is...	Then slide the power supply in the power supply bay...
	In the middle of the rear of the unit	And push the CAM mechanism levers into place.
	At the top of the rear of the unit	Until you hear the power supply connect with the connector inside the disk shelf chassis. Raise the handle and push it into place.
3	The following figure shows how to raise the handle into place.
4	If the disk shelf has...	Then...
	An AC power supply	Plug the power cord into the power receptacle and fasten it with the clamp. Plug the other end of the power cord into a grounded AC power source.
	A DC power supply	Connect the positive, negative, and ground wires to the power supply. Plug the other end of each power cord into a power source.
5	Turn on the power switch.