Technical information

Troubleshooting and Repair
147
Troubleshooting
4. Push the upper and lower latches away from you until
they are vertical and the card is locked in place.
5. To return the circuits to service, enter:
RTS <PLID>
Replacing a Main Controller Card
When you replace a Main Controller (MC) card, ensure that
the programmed MC card and the installed MC card match.
If they do not match, no links are assigned.
1. Remove the front panels.
2. Perform a DATA SAVE to RSD. See Making a DATA
SAVE Backup on page 164.
3. If you have a redundant system:
- Switch activity to the plane with the healthy Main
Controller card.
- Hold down PANEL ENABLE and press ACTIVITY
FREEZE ON.
- Enter FILE STAT REDUN from the active plane and
then from the inactive plane. Both planes should be IN
SYNCH. If they are not, see Table 25 Status of
Redundant File System (page 125)
4. Enter:
DBMS STAT
The DBMS initialized flag should be ON.
5. Enter VOL DISMOUNT SYSUSER (from the inactive
plane).
Power down the control node before removing the
MC card. Powering down the node takes the system
out of service.
6. Set the power switch on the (inactive plane) power
distribution unit at the rear of the cabinet to “0” (OFF).