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Chapter 2: Getting Started and Controlling the Chart Display
Adjusting the
Lighting and
Contrast
2.3 Adjusting the Lighting and Contrast
You can change the level of screen backlighting and monochrome screen
contrast.
• A 630 Chartplotter with color display has six brightness levels and a day/
night view setting.
• A 620 Chartplotter with a monochrome display has six brightness levels and
40 contrast levels.
Note: The color display lighting can be dimmed but cannot be turned off.
The control key lighting is bright when the screen backlighting is on.When the
screen lighting is off, the keys are lit at a low level so that you can always find
the keys.
➤ To change the backlighting and contrast:
1. Press the POWER key. (Do not press and hold the key, or the power-off
message will be displayed.)
The brightness slider is displayed on the color screen; the soft keys provide
control of the slider and the night /day setting.
Two sliders appear on the monochrome screen, showing the current
settings for brightness and contrast; the soft keys provide control of the
sliders.
Color
D4195_1
BRIGHTNESS
BRIGHTNESS - BRIGHTNESS + NIGHT VIEW
Monochrome
D3820-1
BRIGHTNESS -
BRIGHTNESS + CONTRAST -
CONTRAST +
BRIGHTNESS CONTRAST
2. Press the appropriate soft key, to adjust the backlight brightness or the
contrast to the required level. The brightness and contrast change as you
adjust the sliders.
On the color display, press the NIGHT VIEW/DAY VIEW soft key to switch
between the night and day setting.
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