Installation guide

Upgrading System Memory in Cisco 3600 Series Routers

78-3636-05

Tools and Equipment Needed

Caution For safety, periodically check the resistance value of the antistatic strap. It should be between 1 and 10

megohms (Mohms).

Caution Before opening the chassis, be sure that you have discharged all static electricity from your body and the

power is OFF.

Tools and Equipment Needed

You need the following tools and equipment to remove and install SIMMs, DIMMs, or the ROM in a

Cisco 3600 series router:

• Number 2 Phillips screwdriver

• Small flat-blade screwdriver

• ROM extraction tool

• 32-pin plastic leaded chip carrier (PLCC) for removing the ROM chip from the mainboard

• Needlenose pliers

• ESD-preventive wrist strap

• Antistatic mat

Opening the Router

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.

Warning

Before performing any of the followingprocedures,ensure that power is removed from theDC circuit.

To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC

circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit

breaker in the OFF position. To see translations of the warnings that appear in this publication, refer

to the

Regulatory Compliance and Safety Information

document that accompanied this device.

Proceed to the section that pertains to your router:

• Removing the Router Cover (Cisco 3620, Cisco 3631, Cisco 3640), page 14

• Removing the Mainboard Tray (Cisco 3660), page 16