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Chapter 7. Maintenance and
This section discusses unit maintenance and troubleshooting for the OM20 Universal Satellite
Modem.
The OM20 contains a Lithium Battery.
the battery is incorrectly replaced. Replace only with the same or equivalent
type recommended by the manufacturer.
accordance with local and national regulations.
7.1
Periodic Maintenance
There is no external fuse on the OM20. The fuse is located on the power supply assembly inside
the case, and replacement is not intended in the field.
7.1.1 Clock Adjustment
The OM20 allows for internal VCO speed adjustment from the GUI. Clock adjustment should be
performed only when an internal clock source has insufficient accuracy for the custom modem
application.
7.2
Troubleshooting
Should a unit be suspected of a defect in field operations after all interface signals are verified,
the correct procedure is to replace the unit with another known working OM20. If this does not
cure the problem, wiring or power should be suspect. The following is a brief list of possible
problems that could be caused by failures of the modem or by improper setup and configuration
for the type of service. The list is arranged by possible symptoms exhibited by the OM20
modem.
MN-OM20– Revision 5
Troubleshooting
DANGER OF EXPLOSION
Dispose of used batteries in
exists if
7–1
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