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6-2
RayChart 420/420D Chartplotter
Always report any EMC-related problem to your nearest Raytheon dealer. We
use such information to improve our quality standards.
In some installations, it may not be possible to prevent the equipment from
being affected by external influences. In general this will not damage the
equipment but it can lead to spurious resetting action, or momentarily may
result in faulty operation.
6.2 Resetting the system
Two types of reset are available for the Chartplotter:
• Power-On Reset: When you turn the display unit off, then on again, the
screen reverts to the chart display with all windows cleared.
• Factory Reset: This resets all values back to their original factory settings.
Note: Take care - factory reset clears all Waypoint and Route databases.
At power-on, the last-used values are retained for all the options, except for
those listed in the following table which are reset to the factory default each
time.
ItemItem
ItemItem
Item
Power-on settingPower-on setting
Power-on settingPower-on setting
Power-on setting
Heading Mode North Up
Alarm ON, with last-used value
Contrast Level Within 30-70% range, if last-used value outside this range
Backlight Level ON at the lowest level if previously ON
To perform a factory reset:
1. Power off the unit.
2. Press and hold CLEAR whilst powering up until <Erase backup
procedure> is displayed.
3. Either press CLEAR to abort Factory Reset and resume normal Power-Up
or press ENTER to continue Factory Reset.
4. Press ENTER again; the unit restarts as for a first time Power Up with all
values reset to their original factory settings
Note: The factory default settings are listed in Chapter 4.