Lucent Technologies DEFINITY AUDIX Installation And Upgrade page 130

Upgrades to R3.2
To remove the TN566 MFB and the TN2169 alarm board, perform these steps:
1. Unsnap the two gang latches at the bottom front of the MFB and alarm
board, and swing downward. Squeeze the boards together and slip off
the spring clip .
!
CAUTION:
Carefully slide the DEFINITY AUDIX system from the switch carrier.
Handle with care. The system weighs 6.2 pounds, use both hands
when removing the system.
2. Disconnect the interboard bus cable from the top edge of both boards
using the pull tab.
3. Remove the three socket-head slotted screws that hold the MFB to the
alarm board.
4. Separate the two boards.
5. Cut and remove the tie wrap that holds the power cable and the tape drive
SCSI bus cable against the alarm board.
6. Cut and remove the tie wrap that holds the power cable and the disk drive
SCSI bus cable against the alarm board.
7. Unlock the two retaining pins from the slots along the edge of the alarm
board that hold the tape drive in place. Pull out the pins to release the
drive from the drive mounting bracket.
8. Disconnect the tape drive SCSI bus cable from the tape drive.
9. Disconnect the tape drive SCSI bus cable from the alarm board.
10. Disconnect the tape drive power cable from the tape drive.
11. Unlock the two retaining pins from the slots along the edge of the alarm
board that hold the disk drive in place. Pull out the pins to release the drive
from the drive mounting bracket.
12. Disconnect the disk drive SCSI bus cable from the disk drive.
13. Disconnect the disk drive SCSI bus cable from the alarm card.
14. Disconnect the disk drive power cable from the disk drive.
15. Disconnect the power cable from the alarm board.
Depending on the upgrade needed, replace the TN566 MFB with either the
TN566B MFB or the TN567 MFB. If necessary, replace the TN2169 Alarm Board
with the TN2170 Ethernet Alarm Board at this time.
7-12
Issue 2 December 1996