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Operation Guide 5271/5278/5307
MA1207-EA
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Solar Charging
A solar panel generates electrical power that charges a built-in (secondary) battery.
The entire face is a solar panel, so power is generated when the face is exposed to
light. Keep the watch exposed to light as much as possible.
Charging the Battery
When you are not wearing the watch, leave it where it is exposed
to light. For stable operation, expose the watch to at least a half
day of light per month.
When wearing the watch, try to keep your clothing from blocking
its face (solar panel). Charging efficiency is reduced significantly
even if the face is blocked only partially.
Caution!
The case of the watch may become quite hot when charging. Guard against burn
•
injury after charging.
Avoid charging in the following locations, and anywhere else where the watch may
•
become very hot.
On the dashboard of an automobile parked in the sun −
Close to an incandescent light source or other sources of heat −
Locations exposed to direct sunlight for long periods −
Low Charge and Dead Battery Conditions
An alert operation is performed when the battery charge goes low.
Low Battery Alert
The second hand will jump in two-second increments to alert you when the charge
is low.
2-second jump
Low charge
Regular Timekeeping Low Battery Alert
Charged
Charging Time
The times below are general guidelines for reference only.
Charging Time to Support Daily Use
Exposure Level (Brightness) Approximate Charging Time
Outdoor sunlight (50,000 lux) 8 minutes
Sunlight through a window (10,000 lux) 30 minutes
Daylight through a window on an overcast day
(5,000 lux)
48 minutes
Indoor fluorescent lighting (500 lux) 8 hours
Charging Time to Recover from Dead Battery
Exposure Level
(Brightness)
Approximate Charging
Time to 1-second Hand
Movement
Approximate Time to
Full Charge
Outdoor sunlight (50,000 lux) 3 hours 24 hours
Sunlight through a window
(10,000 lux)
11 hours 88 hours
Daylight through a window on
an overcast day (5,000 lux)
17 hours 140 hours
Indoor fluorescent lighting
(500 lux)
167 hours – – –
Important!
The watch will continue to run for about five months after a full charge, even if it is
not exposed to light. For stable operation, however, expose it to light as much as
possible.
Note
Actual charging time depends on environmental conditions.
Over-charge Protection
Charging stops automatically when a full charge is attained. This protects against
over-charging.
Your watch may differ somewhat from the one shown in the illustration. •
Before Using the Watch for the First Time
Crown
Spacer
Depending on your watch model, there may be a spacer installed •
at the factory around the crown. If your watch has a spacer, you
should remove the spacer before using the watch.
After removing the spacer, use the procedures in “Crown •
Operations” and “To adjust the time setting” to set up the watch
for use.
Hour Hand
Second Hand
Minute Hand
Setting time
Crown
To adjust the time setting
When the second hand is at 12 o’clock, pull the Crown out.
Rotate the Crown to change the time setting.
Push the Crown back in.
Note
When changing the time, move the minute hand four or five minutes past your final
•
setting, and then back it up to the setting you want.
Crown Operations
Some water-resistant models (100 meters, 200 meters)
have a screw-in crown. When you need to perform a crown
operation, rotate it towards you to unscrew it. Then pull the
crown out. Avoid applying undue force when pulling. The watch
loses its water resistance while the crown is unscrewed. After
performing a crown operation, fully screw the crown back in.
Crown
Loosen
If your watch has a rotary bezel...
You can rotate the bezel to align its
▼
mark with the
minute hand. Then you will be able to tell how much
time has elapsed since aligning the
▼
mark.
Start
Elapsed time
Current
Specifications
Accuracy: ±20 seconds average per month
Other: Low battery alert
Power Supply: Solar panel and one rechargeable battery
Approximate battery operating time: 5 months