Comdial DX-80 Technical Manual page 54

Installing the DX-80
Circuit boards are susceptible to damage caused by electrostatic
discharge. You must keep this in mind as you handle the circuit
boards. Refer to Comdial publication IMI01-005, Handling of Electrostatically
4. Comdial recommends installing the COM4 closest to the 408M/E. This means you must tem-
porarily remove the CPM and then reposition the CPM above the COM4 once you have
installed the COM4 (in KSU1). For KSU2 installation skip step 5 and proceed with step 6.
5. Remove the installed CPM by removing the four brass standoffs used to secure the board,
retaining these standoffs for later use. Remove the ribbon cable that connects the CPM to the
408M then set it aside.
6. Remove the COM4 module from the packaging and locate the four brass-color standoffs pack-
aged with the module.
7. Position the COM4 over the 408M/E (right-hand side) where you just removed the CPM
(KSU1).
8. Use the four brass-color standoffs supplied with the COM4 to secure the COM4 in position.
9. Connect the COM4 ribbon cable from the 408M/E to the COM4 connector. Press firmly (but
not forcefully) on the connector to secure a good connection. For KSU2 installation, skip step
10 and proceed to step 11.
10. Reposition the CPM over the installed COM4 and secure using the four brass-color standoffs
removed in step 4.
11. Make cable/wiring connections to the 4 CO line ports as required.
The FCC requires that wiring of CO lines into a KSU be separated
from wiring of station apparatus into a KSU. Therefore you must use
12. Replace the KSU cover and secure with cover screws.
13. Restore KSU power.
54
WARNING
Sensitive Components, for details.
CAUTION
separate cables for wiring stations and CO lines.
Comdial October, '03