Testboy TV 455 - Backlight and Contrast Adjustments

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TV 450/455 Display organization
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Figure 3.6: Examples of help screens
3.4.7 Backlight and contrast adjustments
With the BACKLIGHT key backlight and contrast can be adjusted.
Click
Toggles backlight intensity level.
Keep pressed for 1 s
Locks high intensity backlight level until power is turned off or the
key is pressed again.
Keep pressed for 2 s Bargraph for LCD contrast adjustment is displayed.
Figure 3.7: Contrast adjustment menu
Keys for contrast adjustment:
DOWN
Reduces contrast.
UP
Increases contrast.
TEST
Accepts new contrast.
Function selectors
Exits without changes.