Carrier Access Broadmore 1750 - Manual (Page 223)

Broadmore 1750 - Release 4.6 8-35
Maintenance and Troubleshooting
CPU Replacement
CPU Replacement
CAUTION!
WHEN INSTALLING A REPLACEMENT CPU IN A REDUNDANT
CPU SYSTEM , DO NOT REBOOT OR POWER DOWN THE SYSTEM BEFORE CPU
SYNCHRONIZATION IS COMPLETE AS INDICATED BY A SOLID STATUS LIGHT .
NOTE: 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).
NOTE: The new CPU card will come configured. Any necessary updates
will be announced.
8. Replace the chassis front cover.