Cisco 3745 Installationsanleitung PDF herunterladen (Seite 22)

Installing Field-Replaceable Units in Cisco 3745 Routers

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Replacing the Cisco 3745 Router I/O Board

Caution The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions.

Step 8 When you are ready to install the mainboard tray, see the “Installing the Mainboard Tray” section that

follows.

Installing the Mainboard Tray

To replace the mainboard, perform the following steps:

Step 1 Place the chassis so that the empty mainboard slot faces you. Make sure that all cables are securely

tucked in and that they are not in danger of being stressed or cut.

Step 2 Make sure that the ejector levers are fully open. Carefully insert the mainboard tray into the chassis slot

until the connector is engaged, then close the ejector levers to fully seat the mainboard connector. (See

Figure 14.)

Step 3 With a number 2 Phillips screwdriver, tighten the two captive retention screws (one at each edge of the

mainboard).

Step 4 Hold the fan tray straight out from the chassis, engage the hinges, and close the fan tray. (See Figure 12,

numbers 1 and 2.)

Step 5 Tighten the two captive screws behind the small access door at the right-hand edge. (See Figure 6.)

Step 6 Reinstall the chassis on a rack or desktop.

Step 7 Proceed to the “Replacing Connections to the Router” section on page 26.

Replacing the Cisco 3745 Router I/O Board

Removing the I/O Board

To remove the I/O board, perform the following steps:

Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the

equipment end of the wrist strap to the metal backplate of the chassis, avoiding contact with the

connectors.

Step 2 Turn off the power and unplug the power cord.

Caution The Cisco 3745 router can have more than one power supply. Be sure that all power supplies are powered

off and that all LEDs are off.

Step 3 Place the router on a flat surface so that the rear panel faces you.

Step 4 Loosen the two captive screws located at each end of the I/O board. (See Figure 15.)

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Cisco 3745 Installationsanleitung Seite 22