Cisco AJ732A - MDS 9134 Fabric Switch Installation Manual page 161

Chapter 2 Installing the Cisco MDS 9500 Series
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
1
Always wear an ESD wrist strap when handling modules or coming into contact with internal
Caution
components.
To remove the clock module, follow these steps:
Remove power from both power supplies as follows:
Step 1
•
•
Caution
Step 2 Use a Phillips screwdriver to remove the 18 back panel screws from the rear of the Cisco MDS 9509
Director chassis.
Note
Step 3 Remove the four screws that secure the clock module to the backplane. (See
OL-17467-02
Clock A (CLK A)
If the power supply is AC, press the power switch to off (0) and remove the power cable.
If the power supply is DC, follow the instructions in the
the Cisco MDS 9509 Director" section on page
Before working on a system that has an on/off switch, turn off the power and unplug the power
cord.
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.
Removing and Installing Clock Modules
2
Clock B (CLK B)
"Providing Power to a DC Power Supply in
2-33.
Cisco MDS 9500 Series Hardware Installation Guide
Figure 2-44.)
2-81