Cisco 3800 Series, Quick Start Manual

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107
Installing and Upgrading Internal Components in Cisco 3800 Series Routers
OL-5975-04
Removing and Installing the Fan Tray and Power Supplies in a Cisco 3845 Router
Step 2
To remove a power supply, use a flat-blade or number 2 Phillips screwdriver to loosen the two captive
thumbscrews. Holding the thumbscrews, rotate the ejector levers on each side of the power supply
outward. Fold the handle up, and pull the power supply out by the handle. See
Figure 75 . An AC power
supply is shown as an example.
Figure 75 Removing the Power Supply from a Cisco 3845 Router (AC Shown)
Step 3 Make sure that the ejector levers on the new or replacement power supply are extended out away from
the power supply. Insert the power supply into the router from the front. The power supply has a built-in
connector; you do not need to attach any cables.
Step 4
Rotate the ejector levers inward until the power supply latches into place. Fold down the handle. Use a
flat-blade or number 2 Phillips screwdriver to tighten the captive thumbscrews.
Step 5
If necessary, use a flat-blade screwdriver to pry off the plastic panel from the front of the fan tray
assembly at the power supply location. Use a number 1 Phillips screwdriver to remove the metal cover
plate.
Step 6
Replace the fan tray assembly and tighten the mounting screws.
1 Loosen captive thumbscrews 2 Rotate ejector levers outward
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