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Operation Guide 4782 (OC)
2
Charging Precautions
Avoid charging the watch in the following locations, and anywhere
else where the watch may become very hot.
• On the dashboard of an automobile parked in the sun
• Very close to an incandescent light source or other sources of
heat
• In a location exposed to direct sunlight for long periods
Note that the display panel may become black under very high
temperatures. This is temporary, and the display will appear normal
again at lower temperatures.
Depending on the light source you are using, the
case of the watch may become quite hot when
charging. Take care to guard against burn injury
after charging.
❚
To charge the battery
Point the solar panel (face) of the watch at a light source.
• Remember that even a partial blockage of the solar cell reduces
charging efficiency.
Example: Positioning the watch
Solar Cell
• The illustration shows the resin band model.
In any mode (except when a setting screen is on the display), press
the B button to illuminate the display for easy reading in the dark.
• Illumination may be difficult to see under bright sunlight.
• Illumination turns off automatically if an alarm sounds, etc.
• Illumination will no turn on while manual receive is in progress.
Illumination
The power supply of this watch uses a solar cell to generate
electrical power, which is stored by a rechargeable battery.
Using or storing the watch where it is not exposed to light regularly
or allowing it to be blocked from light by your sleeve as you are
wearing it can cause the power of the rechargeable battery to run
down. To ensure stable operation, be sure to allow the watch to be
exposed to light as much as possible when you are wearing or
storing it.
Important!
Note that all settings are cleared whenever you allow the
rechargeable battery to drop to Level 5.
Checking the Battery Level
Use the Battery Mode to check the current level of the watch’s
rechargeable battery.
• In the Timekeeping Mode, press the C button once to change to
the Battery Mode.
Timekeeping Mode
Example: Day of the week screen
Battery Mode
Level 1
Level 2
Level 3
Level 4
Level 5
All functions enabled.
All functions enabled.
All functions, including timekeeping,
disabled.
Analog timekeeping, display, display
illumination, alarms, hourly time
signal, and signal reception
disabled.
Hands stopped at 12 o’clock; display
illumination, alarms, hourly time
signal and other alerts, and time
calibration signal reception disabled.
• “LO” and the seconds are displayed in the Timekeeping Mode
when the battery is at Level 3.
• Exposing the watch to direct sunlight or other strong light may
cause the battery level indicator to indicate a level momentarily
that is higher than the actual battery level. Because of this, you
should wait for a short while after charging to check the battery
level indicator.
• Even if the battery level drops all the way to Level 5, you still will
be able to recharge the battery and use the watch again.
• When recharging from Level 5, set the current time and date after
the battery level recharges to Level 4. Note, however, that the
watch’s hands will not start to move at this time, and you should
continue to expose the watch to light so the battery can charge up
to Level 2 or Level 1.
Level 3 indicates charging is
required!
Battery Level 3 or 4 indicates that remaining battery power is very
low. Be sure to recharge the battery by exposing the watch to light
as soon as possible at the first sign of low battery power.
Recover Mode
If you use the light or alarm a number of times during a short period
or perform any other operation that puts a large load on the battery,
the analog hands will stop. At this time a recover indicator (R) also
will appear on the Battery Mode screen. This indicates that the
watch has disabled the following operations in order to allow battery
power to recover.
• Display illumination
• Alarm and hourly time signal
• Analog timekeeping
• Time calibration signal reception
Normal operation will return after the
battery recovers.
Charging Guide
Starting from a full charge, the watch should be able to continue
operating for about six months without further charging under the
conditions described below.
Example of Daily Use
• Illumination: 1.5 seconds/day
• Alarm: 10 seconds/day
• Signal reception 6 minutes/day
Making sure the watch is exposed to light ensures stable operation.
Required Daily Charging Time
• The following is the daily amount of charging required each day to
support the operations under “Example Daily Use” above.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight through a Window (10,000 lux)
Overcast Daylight through a Window (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Charging Time
8 minutes
27 minutes
43 minutes
8 hours
• Approximate Charge Times Required to Advance to a Higher
Level
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight through
a Window
(10,000 lux)
Overcast Daylight
through a Window
(5,000 lux)
Indoor Fluorescent
Lighting
(500 lux)
Charging Time
Level 5
\
Level 4
\
Level 3
\
Level 2
\
Level 1
2 hours
10 hours36 hours
6 hours
9 hours
100 hours
38 hours140 hours
61 hours220 hours
– – –– – –
• Note that the above charging times are for reference only. Actual
charging time depends on a variety of environmental factors.
Power Supply
Battery Mode
Recover Indicator