Carrier Access 1750 Benutzerhandbuch

Each CPU card has a battery that should be replaced 

periodically.  See Appendix B, Spare Parts List for part number information.

There are no field-repairable items on the CPU card. In a single CPU system, there will 
be a disruption of system control and administration during card replacement. In a 
redundant CPU system, user PVCs through the ATM network remain intact during 
replacement of a CPU. In a single CPU system, the CPU will reboot and all PVC 
service is interrupted. Follow the steps below to replace a CPU Card.

1. Ensure that you have a replacement module.

2. Remove the chassis front cover.

3. Loosen retaining screws at the top and bottom of the CPU card to be replaced. 

The Broadmore 1750 retains power; the CPU card may be removed/replaced 
without service disruption to other modules.

4. Use the installed ejectors to unseat the CPU card from the midplane. This is 

done by simultaneously pushing up on the top ejector and down on the bottom 
ejector.

5. Remove the defective CPU card by pulling it straight out chassis front.

6. Insert the replacement CPU card, ensuring correct alignment with the card 

guides and midplane connector.

7. Firmly press the new CPU card into place so that it is fully seated with the 

midplane connector. Tighten both retaining screws (finger tight only).

The new CPU card will come configured. Any necessary updates 

will be announced.

8. Replace the chassis front cover.