G-Shock G-7800-1 - Manual (Page 4)

Operation Guide 3163
4
Illumination
!UTO
INDICATOR
This watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch turns on illumination
automatically when you angle the watch for reading
towards your face.
• The auto light switch must be enabled (indicated by the
auto light switch indicator) for it to operate.
• See “Illumination Precautions” for more important
information.
To illuminate the display manually
In any mode, press
L to turn on illumination for about
one second.
• The above operation turns on illumination regardless of
the current auto light switch setting.
About the Auto Light Switch
While the auto light switch is enabled, illumination turns on whenever you position
your wrist as described below in any mode.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
Parallel to ground More than 40°
Warning!
• Always make sure you are in a safe place whenever you are reading the watch
using the auto light switch. Be especially careful when running or engaged
in any other activity that can result in accident or injury. Also take care that
sudden illumination by the auto light switch does not startle or distract others
around you.
• When you are wearing the watch, make sure that its auto light switch is
disabled before riding a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffi c accident and serious personal injury.
To enable and disable the auto light switch
In the Timekeeping Mode, hold down
L for about three seconds to toggle the auto
light switch between enabled (auto light switch indicator displayed) and disabled (auto
light switch indicator not displayed).
• The auto light switch indicator is on the display in all modes while the auto light
switch is enabled.
• In order to protect against running down the battery, the auto light switch is disabled
automatically approximately six hours after you enable it.
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Display
Auto Display cycles automatically through the screens of
each mode.
To turn off Auto Display
Press
A or C.
To turn on Auto Display
In the Timekeeping Mode, hold down
B and D for about
two seconds.
• Note that Auto Display cannot be turned on while a
setting screen is on the display.
Flash Alert
When Flash Alert is on, the LED under the display will
fl ash in time with the countdown alarm, alarms, and the
Hourly Time Signal.
To turn Flash Alert on and off
1. In the Timekeeping Mode, hold down
A until the
seconds start to fl ash, which indicates the setting
screen.
2. Press C ten times to display the Flash Alert setting
screen.
3. Press D to toggle Flash Alert on (SYNCHRO displayed) and off (OFF displayed).
4. Press A to exit the setting screen.
• The Flash Alert setting you select with the above procedure is applied in all modes.
• You also can use the above procedure to check the current Flash Alert on/off setting.
Contrast Adjustment
You can adjust the contrast of the watch to make its display fi gures darker or lighter.
To adjust contrast
1. In the Timekeeping Mode, hold down
A until the seconds start to fl ash, which
indicates the setting screen.
2. Press C 12 times to display the contrast adjustment (CONT) screen.
3. Use D (+) and B (–) to scroll through the available display format numbers
(1 through 7).
4. Press A to exit the setting screen.
Button Operation Tone
The button operation tone sounds any time you press one of the watch’s buttons. You
can turn the button operation tone on or off as desired.
• Even if you turn off the button operation tone, the alarms, the Hourly Time Signal,
and the countdown alarm all operate normally.
To turn the button operation tone on and off
-UTE
In any mode (except when a setting screen is on the
display), hold down
C to toggle the button operation tone
on (mute indicator not displayed) and off (mute indicator
displayed).
• Holding down C to turn the button operation tone on or
off also causes the watch’s current mode to change.
• The mute indicator is displayed in all modes when the
button operation tone is turned off. The LED light will
fl ash when you change modes.
Auto Return Feature
If you leave a screen with fl ashing digits on the display for two or three minutes without
performing any operation, the watch exits the setting screen automatically.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls at high speed.
Initial Screens
When you enter the Stopwatch, Alarm or World Time Mode, the data you were viewing
when you last exited the mode appears fi rst.
Timekeeping
• The year can be set in the range of 2000 to 2099.
• The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced.
World Time
• All World Time Mode times are calculated from the current Home City time in the
Timekeeping Mode using UTC time differential values.
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
• The UTC differential is a value that indicates the time difference between a reference
point in Greenwich, England and the time zone where a city is located.
• The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the
world-wide scientifi c standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds.
Leap seconds are added or subtracted as necessary to keep UTC in sync with the
Earth’s rotation.
Illumination Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• Illumination may be hard to see when viewed under direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This
is due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination runs down the battery.
Auto light switch precautions
• Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light
switch to operate when it is not needed, which shortens battery life. If you want to
wear the watch on the inside of your wrist, disable the auto light switch feature.
• Illumination may not turn on if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.
• Illumination turns off in about one second, even if you
keep the watch pointed towards your face.
• Static electricity or magnetic force can interfere with
proper operation of the auto light switch. If illumination
does not turn on, try moving the watch back to the
starting position (parallel with the ground) and then tilt it
back towards you again. If this does not work, drop your
arm all the way down so it hangs at your side, and then
bring it back up again.
• Under certain conditions, illumination may not turn on until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the auto light switch.
• You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.