Light; Illuminating The Display Manually; Auto Light; Configuring The Full Auto Light Setting - Casio 5631 Operation Manual

Light

The watch has an LED light that you can turn
on for viewing in the dark.
The watch also has an auto light function that
automatically illuminates the display
whenever the watch is angled for reading in
the dark.
Illuminating the Display
Manually
Pressing (L) turns on illumination.
Illumination will turn off automatically if an
●
alarm starts to sound.

Auto Light

If Full Auto Light is enabled, face illumination
will turn on automatically whenever the watch
is positioned at an angle of 40 degrees or
more.
Important!
Auto Light may not operate properly
●
when the watch is at a horizontal angle
of 15 degrees or greater from
horizontal as shown in the illustration
below.
Auto Light may operate unintentionally
●
and run down the battery if the watch
is blocked from light by your sleeve.
Electro-static charge or magnetism
●
can interfere with proper Full Auto Light
operation. If this happens, try lowering
your arm and then angle it towards
your face again.
When moving the watch you may note
●
a slight rattling sound. This is the sound
of Full Auto Light switch operation and
does not indicate malfunction.
Operation Guide 5631
Note
Full Auto Light is disabled when any
●
one of the conditions below exists.
Alarm, timer alert, or other beeper
ー
sounding
Configuring the Full Auto
Light Setting
1.
Enter the Timekeeping Mode.
Navigating Between Modes
l
2.
Hold down (A) for at least two seconds
until the name of the currently selected
Home City is displayed.
3.
Press (D) 12 times to display [AUTO].
40
4.
Press (E) to toggle Full Auto Light between
degrees
enabled and disabled.
or more
[ON]: Face is illuminated when the watch
is angled towards your face where lighting
is low.
[OFF]: Face is not illuminated when the
watch is angled towards your face.
5.
Press (A) to exit the setting screen.
Specifying the Illumination
Duration
You can select either 1.5 seconds or three
seconds as the illumination duration.
1.
Enter the Timekeeping Mode.
l
2.
Hold down (A) for at least two seconds
until the name of the currently selected
Home City is displayed.
3.
Press (D) 13 times to display [LIGHT].
Home City
4.
Press (E) to select an illumination
duration.
[1]: 1.5-second illumination
[3]: 3-second illumination
5.
Press (A) to exit the setting screen.
Navigating Between Modes
Home City
16