Nortel Networks BCM50 - Manual (Page 199)

Chapter 24 Replacing an internal component 199
Installation and Maintenance Guide
Ensure the fans are oriented so air flows out of the unit.
3 Connect the fan cable to the header.
4 Ensure your route the fan cable through the cutouts under the hard disk and bracket. Also,
make sure that you secure any slack in the fan cable with the clips on the hard disk bracket.
See the figure
Hard disk and bracket installation on page 193.
5 Insert the hard disk. See the procedure To insert the new hard disk on page 196.
6 Continue with the procedure To close the main unit case on page 200.
To insert the new router card
1 Attach one end of a grounding strap to your wrist and the other end to a grounded metal
surface.
2 With the back of the router card raised enough to clear the LED pipes, align the modular
connectors on the router card with the corresponding holes in the bezel.
3 Move the router card forward until the front edge of the card touches the bezel.
4 Align the card connector on the router card with the connector on the Compact Services Card
(CSC).
5 Gently press down on the back of the router card to seat the router card in the connector on the
CSC.
6 Use the three screws you removed in the procedure To remove the router card on page 195 to
secure the Router card to the CSC.
7 Continue with the procedure To close the main unit case on page 200.
Note: Ensure the label of the new fan faces the back of the BCM50 unit. Air must
flow out of the unit as indicated by the arrows imprinted on the fan.
Note: Do not force the cable.
The connectors on the fan cable prevents you from inserting the cable backwards.
If you cannot insert the cable properly, check that the raised edge on the fan cable
connector faces the plastic tab on the header.
Caution: Use only the original screws to secure the Router card. Using other
screws can interfere with proper installation.