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Page 138 CPV550
25. TECHNICAL TESTS
25.0 SYSTEM TEST
If you have connected your GPS chartplotter according to the instructions, and chosen the
proper menu selection for your device, and are still having problems with your GPS
chartplotter, the extended auto-test should help determine the problem. Make sure the GPS
chartplotter is turned Off. While pressing and holding any other key, turn the GPS
chartplotter On. SYSTEM TEST menu will appear on the display:
Figure 20.0 - System Test
Use the ShuttlePoint knob to select the desired test. Choose the test, press [ENT]. To exit
from any submenu press [CLR]. To exit from the System Test turn Off the GPS chartplotter.
25.0.0 RAM Menu (reset)
This test verifies the integrity of the memories and if desired during this test all the internal
memory can be erased and the default setting restored.
RAM Clear
To clear internal memory. If the GPS chartplotter exhibits unusual operations, or appears
to be malfunctioning, it may be possible to correct the problem by clearing RAM.
This operation will erase all Marks, Routes, stored Track plots and Destinations. It will also
return all selections (Input Data Format, Autopilot selection, etc.) to original default values.
To confirm clear RAM press [ENT] again (but if at this time you do not wish to clear RAM
press [CLR]).
25.0.1 DIM Menu
To select the desired value for brightness and keypad light.
Contrast
Each time you move the ShuttlePoint knob to right, the screen will decrease brightness,
move it to the left to increase brightness.
Backlight
The second option allows to set the backlight. Operates in similar mode as Contrast.