IBM DS4700 manual Replacing an ac power supply and fan unit, Removing and replacing a controller

Notch

Guide pin

Lever

Figure 27. Removing and replacing a controller

2.As you slide the controller into the empty slot, make sure the guide pins on the side of the controller fit into the notches. After the guide pins fit into the notches and the controller fits snugly into the bay, push the lever downward or upward 90°, depending on whether the controller is inserted in the A or B controller bay to fully latch it into place. Do not force fit. The controller is designed to prevent it from being inserted into the chassis incorrectly.

Attention: Make sure that the levers lock into place in the storage subsystem chassis.

3.Repeat step 1 on page 48 and step 2 to replace the second controller.

Replacing an ac power supply and fan unit

Statement 5:

CAUTION:

The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

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Chapter 2. Installing the storage subsystem 49