3Com Router 6000 FamilyInstallation ManualChapter 6Maintaining Hardware3Com Corporation6-3Step 3: Pull the entire fan module out after it completely stops rotating.Caution:z The fan module is rather long. Use one hand to hold the bottom of the fan while theother hand grasps the handle on the fan and pull it out slowly.z Even though you have disconnected the fan module from power supply whenpulling it out, it may still rotate for a while for inertia sake. Be careful and do not putyour finger into the rotating fans.6.3.2 Installing the Fan ModuleStep 1: Hold the handle on the fan module with one hand and the bottom with the other hand.Slowly insert the fan module into the chassis along the guides until it well touches thebackplane.Step 2: Fasten the captive screws on the fan module.Step 3: Power on the router and check that the FAN LED is solid ON.6.4 Removing/Installing the Main Control BoardTake RPU2 removal and installation for example.6.4.1 Removing the RPU2Figure 6-3 Remove the RPU2Step 1: Turn off the power switch or switches if two PSUs are installed.Step 2: Loosen the captive screws at both sides of the RPU2.Step 3: Pull the handles at both side of the RPU2 outward and gently pull the card outalong the guides until it is completely separated from the chassis.
