G-Shock GR-8900 - Manual (Page 4)

Operation Guide 3269
E-30
Illumination
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 toward your face.
• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
• See “Illumination Precautions” (page E-49) for other
important information about using illumination.
To illuminate the display manually
In any mode, press L to turn on illumination.
• The above operation turns on illumination regardless of
the current auto light switch setting.
• You can use the procedure below to select either 1.5
seconds or 3 seconds as the illumination duration. When
you press
L, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current
illumination duration setting.
Auto light switch
on indicator
E-31
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
display contents start to flash. This is the setting screen.
2. Press C 10 times to display the current illumination
duration (LT1 or LT3).
3. Press D to toggle the setting between LT1 (1.5
seconds) and LT3 (three seconds).
4. Press A to exit the setting screen.
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E-32
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn 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 toward
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°
E-33
• 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.
Warning!
••••• Always make sure you are in a safe place whenever you are reading the
display of 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 turned
off 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 traffic accident and serious personal injury.
Lower than 15 degrees to
illuminate
E-34
To turn the auto light switch on and off
In the Timekeeping Mode, hold down L for about three seconds to toggle auto light
switch on (indicator is shown on the display) and off.
• The auto light switch on indicator ( ) is shown on the display in all modes while
the auto light switch is turned on.
E-35
Power Supply
This watch is equipped with a solar cell and a rechargeable battery that is charged by
the electrical power produced by the solar cell. The illustration shown below shows
how you should position the watch for charging.
Example: Orient the watch so its face is
pointing at a light source.
• The illustration shows how to position a
watch with a resin band.
• Note that charging efficiency drops when
any part of the solar cell is blocked by
clothing, etc.
• You should try to keep the watch outside
of your sleeve as much as possible.
Charging is reduced significantly if the
face is covered only partially.
Solar cell
E-36
Important!
• Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
possible.
• This watch uses a rechargeable battery to store power produced by the solar cell, so
regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the rechargeable battery to charge fully, contact your dealer or
CASIO distributor about having it replaced.
• Never try to remove or replace the watch’s rechargeable battery yourself. Use of the
wrong type of battery can damage the watch.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 5 (pages E-37 and E-38) and when you have the
battery replaced.
• Turn on the watch’s Power Saving function (page E-45) and keep it in an area
normally exposed to bright light when storing it for long periods. This helps to keep
the rechargeable battery from going dead.
E-37
Battery Power Indicator
(Charge Soon Alert)
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
5
Function Status
All functions enabled.
All functions enabled.
Illumination, and beeper
disabled.
Except for the CHG (charge)
indicator, all functions and
display indicators disabled.
All functions disabled.
Battery power
indicator
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E-38
• The flashing LOW indicator at Level 3 tells you that battery power is very low, and
that exposure to bright light for charging is required as soon as possible.
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 after falling to Level 5, reconfigure the
current time, date and other settings.
• The watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery drops to Level 5 or when you have the rechargeable battery
replaced.
• Display indicators reappear as soon as the battery is charged from Level 5 to
Level 2.
• Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading temporarily higher than the
actual battery level. The correct battery level should be indicated after a few minutes.
E-39
• Performing illumination or beeper operations during a
short period may cause (recover) to appear on
the display. Illumination, alarm, countdown timer alarm
and hourly time signal will be disabled until battery
power recovers.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
• If (recover) appears frequently, it probably means
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
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Recover indicator