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8 Replacing the Cisco 3660 Router Backplane
Removing the Cisco 3660 Backplane
Use the following procedure to remove the mainboard tray:
Step 1 Power OFF the router. However, to channel ESD voltages to ground, do not unplug the
power cable.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages.
Step 2 Remove all network interface cables from the rear panel of the mainboard tray.
Step 3 Place the router so that the rear panel is facing you.
Locate the two sets of screws on the mainboard rear panel: one set of captive screws and
one set of Torx screws. (See Figure 2.)
Caution Do not remove or loosen the Torx screws.
Step 4 Loosen the two captive screws located in the upper corners. (See part 1 in Figure 2.)
Step 5 Swing the two tray levers out, and slide the mainboard tray out of the chassis. (See parts
2 and 3 in Figure 2.)