— 2 —
2. OPERATION CHART: MODULE QW-3721
Each press of the
BBBBB
button sounds a confirmation tone and cycles through available modes in the sequence shown below
.
The watch will revert to the
T
imekeeping Mode automatically if you leave it in any other mode without performing any operation
for about two
or three minutes.
(Mode Change)
(Light)
Minute Hand
S
econd
Ha
nd
Hour Hand
Date
T
imekeeping Mode
If the time setting is not correct...
Normally
, you should never need to adjust the time setting of the watch as long as it is
able to receive a time calibration signal. If signal reception is impossible for some reason,
use the procedures under
“Adjusting the Home Positions
” to check the home positions of
the hands, and make adjustments as required.
Button
Button
Receive
Successful
OFF
ON
Receive Failed
Use this mode to adjust
the home positions of
the analog hands.
The home positions of the
hands are correct when
they point to 12 o
’clock.
Use this mode to set the alarm time and to turn
the alarm on or off.
The second hand will move to either
“ON
” or
“OFF
”.
Use this mode to check if
signal reception is being
performed normally.
The second hand will move
to either
“GET
” or
“NG
”.
Receive Result Mode
Alarm Mode
Home Position
Adjustment Mode
Modes and Hand Movement
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
V
e
ry close to an incandescent light source or other sources of
heat
In a location exposed to direct sunlight for long periods
Depending on the light source you are using, the
case of the watch may become quite hot during
charging.
T
a
ke care to guard against burn injury
after charging.
T
o
charge the battery
Point the solar cell (face) of the watch at a light source to charge
the battery
.
Remember that even a partial blockage of the solar cell reduces
charging ef
ficiency
.
Example: Positioning the watch
Solar Cell
The illustration shows the resin band model.
Charging Guide
Starting from a full charge, the watch
should be able to continue operating
for about four months without further
charging under the conditions
described below
.
Daily Use
Illumination: 1.5 second
Alarm: 10 seconds
Signal reception: 1
Making sure the watch is regularly
exposed to light ensures stable
operation.
Charge
T
imes Required to
Advance to a Higher Level
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through
a
Window (10,000 lux)
Daylight
Through a Window on
an Overcast Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
Approximate Exposure T
ime
T
imekeeping Restored
Full
Charge
–
–
–
–
–
–
1 hour
2 hours
3 hours
30 hours
12 hours
61 hours
Note that the above charging times are for reference only
.
Actual
charging time depends on a variety of environmental factors.
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 regularly exposed to light, or allowing it to be blocked from light by your sleeve for long periods a
s you are
wearing it can cause the power of the rechargeable battery to run down.
•
• •
•
• • •
•
•
•
•
•
•
A low battery can cause timekeeping to stop, and can also cause time and alarm settings to be lost.
Face illumination or alarm operation can cause hand movement to stop due to the sudden temporary drop in battery power
.
This do
es not
indicate malfunction, and normal operation will resume when the watch is exposed to light.
Though hand movement stops, timekeep
ing
continues internally
, and the hands will be adjusted to the correct setting when normal operation returns.
Checking the Battery Level
Low battery power is indicated when the the second hand starts to jump at two-second intervals.
Jumps two seconds
1-second movement
Indicates date home position.
Normal
Low Power
Alert
T
imekeeping Disabled
Battery level
drops due to
insuf
ficient
charging.
Battery level
drops further
due to
insuf
ficient
charging.
Hands
stop at 12
o
’clock.
If 2-second hand movement is being performed when the current time reaches midnight, the date indicator will change to the home
position indicator (
). If battery power drops to the next lower level, and the hands will stop at 12 o
’clock.
Even after the battery drops to the level that timekeeping becomes disabled, you will be able to resume normal operation by cha
rging the
battery
.
After timekeeping becomes disabled, the hands will move to the current time after the battery is recharged suf
ficiently
.
Keep the watch exposed to light until normal operation returns.
The following
operations are disabled
during 2-second hand
movement.
•
• •
Auto and manual
calibration signal
reception
Face illumination
Alarm
Power Supply
T
o
ensure stable operation, be sure to allow the watch to be exposed to light as
much as possible.
Required Daily Charging T
ime
The following is the daily
amount of charging required
each day to support the
operations under
“Daily Use
”.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
6 minutes
30 minutes
48 minutes
8 hours
Sunlight Through
a
Window (10,000 lux)
Daylight Through
a Window on an
Overcast Day
(5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
Approximate
Exposure
Ti
m
e
■
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•
•
■
• •
Important!