Cisco 3600 Series - Manual (Page 4)

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Step 3 Lift the cover up to a 45-degree angle, and disengage it from the chassis. (See Figure 3.)
Figure 3 Removing the Cover from Chassis of 2-RU Height with Removable Cover
Opening a Chassis with a Plug-In CPU/Mainboard
Perform this procedure with electrical power to the router turned OFF and with network interface cables disconnected.
Warning Before removing the system board tray, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and Safety Information document that accompanied this device.
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages
are present within the power supply even when the power switch is OFF and the power cord is connected. For
systems without a power switch, line voltages are present within the power supply when the power cord is
connected. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information document that accompanied this device.
Step 1 If your router has a hinged front panel (Cisco 3745, for example), loosen the two captive screws behind the access door
at one edge of the panel; then open the front panel to the straight-out position, and lift it off its hinges. See Figure 4.
If your router does not have a hinged front panel (Cisco 3660, for example), the CPU/mainboard is located at the rear
of the chassis, near where the network interface cables are connected. Go to Step 2.
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