Cisco 10720 Configuration Guide - Page 157

Chapter 5 Maintaining the Cisco 10720 Internet Router Removing and Installing the AC or Dual DC Power Supply Caution This router is equipped with a dual power supply. Ensure that both power supply connections are disconnected before beginning any procedure. Warning Read the installation instructions before connecting the system to the power source. Statement 1004 Warning Before working on a system that has an on/off switch, switch OFF the power and unplug the power cord. Statement 1 Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43 Required Tools and Equipment You will need the following tools and equipment to replace an AC or DC power supply: • ESD-preventive strap • Number 1 Phillips screwdriver • Antistatic bag (optional) • Replacement AC or DC dual power supply (See Figure 1-6 and Figure 1-7.) Removing an AC or Dual DC Power Supply To remove the power supply, perform the following steps: Step 1 Step 2 Remove the cable-management cover if it is installed on the router to access the power switch. (See the "Removing and Installing the Cable-Management System" section on page 5-68.) Power down the router. (See the "Disconnecting Power from the Router" section on page 5-3.) Warning Before performing any maintenance on this router or its components, unplug the power cord on AC units. Statement 246 Step 3 Attach an ESD-preventive strap to your wrist, and to the router or to a bare metal surface. (See the "Preventing Electrostatic Discharge" section on page 2-3.) Note To disconnect a DC power supply, proceed to Step 5. 78-13062-10 Cisco 10720 Internet Router Installation and Configuration Guide 5-35