Troubleshooting guide

MX2820 System Manual
7-28 61186003L1-1D
• SCU, P/N 1186003L2, –48 or ±24 VDC
WARNING
To prevent electrical shock, do not install equipment in a wet loca-
tion or during a lightning storm.
WARNING
To comply with NEBS fire test requirements for CO, hut, and vault
installations, vacant slots in the MX2820 shelf need to have a
blank
front panel installed.
CAUTION
Electronic modules can be damaged by static electrical discharge.
Before handling modules, wear an antistatic discharge wrist strap
to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When
working on modules, always place them on an approved antistatic
mat that is electrically grounded.
PROCEDURE
1. Open the container, and remove the SCU from its protective plastic bag.
Each SCU is shipped in its own cardboard shipping carton. Open the carton carefully, and
avoid puncturing the carton with sharp objects. After removing the unit from the carton,
unwrap the bubble-wrap and pull the unit from the antistatic plastic bag.
2. Immediately inspect the SCU for damage.
3. If the shipment has been damaged, file a claim immediately with the carrier, and then
contact ADTRAN Customer Service. For more information, refer to “Appendix B,
Warranty”.
4. Apply power to the MX2820 shelf.
Install the fuse into the appropriate slot of the fuse panel or turn on the circuit breaker to
either feed of the MX2820 shelf.
5. Pull the ejector on the bottom of the SCU front panel from its stowed or closed position.
The MX2820 SCU can be inserted into only the slot adjacent to the Clock Module slots
(labeled
SCU.)