Chapter 3: Service & maintenance
54 Maintenance
Salt deposits
Antenna system, including Antenna Tuning Unit, whip antenna, feeder wire
and especially supporting isolators should be checked regularly and kept
clean to avoid flash-overs and reduced output power causing poor
radiation.
In case the indoor equipment has been exposed to sea water there is a risk
of salt crystallization on the keyboard, knobs and cable connectors on the
control unit, as well as on cable connectors on the transceiver unit, and they
may become inoperable.
Clean the MF/HF radio system with fresh water.
Weekly installation check
Go through the following weekly check procedure:
1. Select a SSB channel or frequency pair, press PTT and check that tune is
done successfully.
2. If a GNSS source is connected, check the position and time in the
MF/HF display.
3. Send a DSC test call to an appropriate coast station or ship.
4. Enter Setup, Diagnostics, Self Test and start the applicable test, noting
that RF-power will be present during testing. Note that output power is
above 60W.
DSC self test
To run a loop back DSC self test, do as follows:
1. Press the soft key SETUP. If it is not in the display, press the soft key
MORE until SETUP appears.
2. Press the arrow soft key or to advance to DSC SETUP.
3. Turn the selector knob to select DSC Self Test. Press and turn the
selector knob to select RUN.
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