HP Cisco MDS 9020 Cisco MDS 9500 Series Hardware Installation Guide (OL-17467- - Page 165

Chapter 2 Installing the Cisco MDS 9500 Series Removing and Installing Clock Modules Send documentation comments to [email protected]. To remove the clock module, follow these steps: Step 1 Step 2 Step 3 Step 4 Remove power from both PEMs, accessed from the front of the chassis as follows: • If the PEM is AC, press the power switch to off (0). Remove the power cord from the PEM. • If the PEM is DC, follow the instructions in the "Removing a DC PEM" section on page 2-64. Loosen the four captive screws on the top power supply. Grasp both power supply handles and slide the top power supply completely out of the chassis. Remove the three screws that secure the clock module to the backplane (See Figure 2-46). Figure 2-46 Clock Module Replacement on the Cisco MDS 9506 Director (Rear View) Connector 120165 Clock module Step 5 The clock module has one connector to the backplane. Gently disconnect and remove the clock module, placing it on an antistatic mat or foam. Note Note the position of the clock module before you remove it from the director chassis because you must install the new clock module in the same position. OL-17467-02 Cisco MDS 9500 Series Hardware Installation Guide 2-85