3Com 3C35420 Installation Manual - Page 5

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Read before

removing a module

Installing the Module

You can remove a module while the system is on.

To remove a module:

1 Record the cabling scheme so that you can correctly recable the new

module, and then disconnect the cables from the module's ports.

2 Loosen the two captive screws that secure the module to the chassis.

3 Move the injector/ejector handles to the outward position.

4 Gently slide the module out of the chassis.

To install the new MMF or SMF module into the system, follow the steps

in this section.

CAUTION: When you handle a module, 3Com recommends that you

always use a wrist strap that is connected to a proper ground. This

precaution helps prevent electrostatic discharge from damaging the

module. Also, when you are not using the module, store it in an antistatic

bag.

1 Put on the ESD wrist strap and ensure that you are properly grounded.

2 Remove the module from its antistatic bag.

WARNING: If the system is on when you are installing the module, do

not insert any metal objects into the open slot (for example, a screwdriver

or a ﬁnger with jewelry). Doing so can cause burns or other bodily harm,

as well as system damage.

3 With the injector/ejector handles in the outward position, place the

module between the guides of the selected slot and gently slide it into

the chassis, as shown in Figure 3.

4 To engage the module and backplane connectors, move the injector

handles to the inward position. You will feel a slight resistance as the

connectors engage.

CAUTION: If the resistance is too great, the module and backplane

connectors may not be aligned. Forcing the module inward can damage

the board or backplane connectors. If necessary, remove and reinsert the

module, ensuring that the connectors are properly aligned. Do not

tighten the captive screws to seat the module.

FDDI M

ODULE

NSTALLATION

UIDE