Comtech EF Data SDM-300A - Manual (Page 355)

SDM-300A Satellite Modem Revision 6
Troubleshooting MN/SDM300A.IOM
18–19
18.3.4 Remove and Replace Power Supply
WARNING
Ensure that all power to the modem is disconnected. Make certain technicians
performing the task are in compliance with all industry safety regulations. DC
modems may contain power within the modem; observe safety regulations
prior to performing the task.
Remove the Power Supply, as follows:
1. Disconnect all power to the modem.
2. Remove the modem from the rack and place modem on a workbench or equivalent area
to perform the task.
3. Remove the hardware securing the cover to the chassis.
4. Remove the cover.
5. Remove the cover from the power supply.
6. Disconnect the multiple wire-plug-in from the Power Supply.
7. Disconnect the plug-in from the Power outlet.
8. Disconnect the GREEN Ground plug-in from the Power supply PCB.
9. Remove the four screws securing the Power Supply to the chassis.
10. Remove the Power Supply.
Install Power Supply, as follows:
1. Position new power supply in the chassis and secure with the four screws.
2. Connect the GREEN Ground wire to the Power Supply PCB.
3. Connect the Power Outlet plug-in to the Power Supply PCB.
4. Connect the multiple wires-plug-in to the Power Supply PCB.
5. Install the Power Supply cover.
6. Install the modem cover and secure with the standard hardware.
7. Reinstall the modem in the rack.