Mitel SX-200 EL, Technician'S Handbook

Page: 71 / 262

Troubleshooting and Repair
61
Tr
oub
le
sho
oting
4. To return the circuits to service, select:
DIAGNOSTICS
MORE_KEYS
RET-TO-SVC <plid>.
Replacing a Main Controller Card
When replacing a main controller card (MCC), you must ensure that the
replacement MCC and the installed MCC match – both in card type
and stratum clock type. This procedure applies to the MCC II,
MCC IIIEL, MCC Yields, MCC IIIML, and the MCC in the SX-200
LIGHT/DIGITAL PBX.
1. Quit the customer data entry mode.
2. If you do not have an up-to-date database backup, create one now.
3. Power-down the Control cabinet.
4. Remove the old MCC.
5. Remove the system ID module or decryption module from the old
MCC and install it onto the new MCC.
6. Transfer any modules from the old MCC to the new MCC.
7. Install the new MCC.
8. Power-up the cabinet.
9. Verify the system date and time. Correct as required.
10. Restore the database.
Refer to Backing Up a Customer Database (page 27) .
Refer to Powering Down the Nodes (page 57).
CAUTION: Wear an anti-static wrist strap whenever you
handle circuit cards.
Refer to Powering Up the Nodes (page 59).
Refer to Restoring the Database (page 55).