Chapter 6. Maintenance And Troubleshooting; Periodic Maintenance; Clock Adjustment - Comtech EF Data DMD50 Installation And Operation Manual

Chapter 6. Maintenance and
This section discusses unit maintenance and troubleshooting for the Universal Satellite Modem.
The modem contains a Lithium Battery. DANGER OF EXPLOSION exists
if the battery is incorrectly replaced.
equivalent type recommended by the manufacturer. Dispose of used batteries
in accordance with local and national regulations.
6.1

Periodic Maintenance

There is no external fuse on the modem. The fuse is located on the power supply assembly inside
the case, and replacement is not intended in the field.

6.1.1 Clock Adjustment

The modem allows for VCO speed adjustment from the front panel. Clock adjustment should be
performed only when an internal clock source has insufficient accuracy for the custom modem
application.
MN-DMD50– Revision 3
Troubleshooting
Replace only with the same or
6–1