User manual

Maintenance
Replacing DS3 Controller Cards
10-10 July 2004 Wide Bank 28 DS3 - Release 2.4
Replacing DS3 Controller Cards
WARNING! THE WIDE BANK CONTAINS CIRCUIT CARDS AND COMPONENTS
THAT ARE SUBJECT TO DAMAGE BY ELECTROSTATIC DISCHARGE (ESD).
A
LWAYS FOLLOW THE STATIC-SENSITIVE EQUIPMENT HANDLING PROCEDURES
ON page 5-3 WHEN OPENING EQUIPMENT COVERS AND HANDLING PLUG-IN
CARDS.
There can be one DS3 Controller Cards installed in the Wide Bank, or there can be two. When two DS3
cards are installed, one of them can be hot-swapped without losing the DS3 connection if both power
connectors A and B are supplied with –48 VDC. When only one DS3 card is installed, or when only one
power connector is supplied with –48 VDC, hot-swapping will interrupt service on the DS3 interface.
With two Controller cards, and both power connectors supplied with –48 VDC, use the switch command
to switch control away from the card to be replaced (if it has not already switched). If possible, always
replace the standby Controller.
NOTE: If a fan faceplate is installed, the replacement Controller card must be a version
that supports the fan faceplate option. FFO-capable Controller cards have a fan power
connector.
Figure 10-7 Replacing a DS3 Controller Card
1. Use a Phillips head screwdriver to loosen the two fastening screws on the faceplate of the Wide
Bank and remove the faceplate. See Figure 10-7.
Card Ejector
Latch
Faceplate
Captive Screws
Controller
Card B
Controller
Card A