Charging Your Watch; Adjusting The Time And Calendar Manually - Citizen Eco-Drive W770 Instruction Manual

Charging your watch

This watch has a solar cell under the dial and stores the power
generated by the cell in its built-in rechargeable cell.
The cell is charged by exposing the dial to light such as direct
sunlight or fluorescent lamps.
For optimal performance, be sure to:
• Put the watch in a location where the dial is exposed to bright
light such as by the window even when it is not used.
• Expose its dial to direct sunlight for 5 or 6 hours at least every
week.
• Avoid leaving it in dark places for long periods of time.
CAUTION
• Do not charge the watch at a high temperature (about 60°C (140°F) or higher) as
doing so may cause movement malfunction.
• If the watch is obscured from light by long sleeves frequently, supplemental
charging may be needed to ensure continual operation.
• The watch stops charging automatically after finishing (overcharging prevention
function). The function prevents damage to performance of the watch and
rechargeable cell due to overcharging.
When the watch reaches a low charge state (insufficient charge warning
function)
When the power reserve becomes low, the second hand moves
once every two seconds. This is the insufficient charge warning
function. Be sure to fully charge your watch immediately as
outlined below.
• When the watch is sufficiently charged, the second hand will
move normally.
• If you do not charge the watch for 10 days or longer after the insufficient charge
warning movement has begun, the watch will be depleted of all power and stop.
During the insufficient charge warning state
The time, date and day of week are indicated correctly.
• The indication in the [TME] mode is displayed in the other modes and functions in
them are not available.
Charging time by environment
Below are the approximate charging times when exposing to light continuously.
Please use this table as a reference only.
Illuminance
Environment
To work for one
(lx)
Outdoors
100,000
(sunny)
Outdoors
10,000
(cloudy)
20cm (7-
7/8 inches)
away from a
3,000
fluorescent
lamp (30W)
Interior lighting
500
• Exposing to direct sunlight is recommended to charge your watch. A fluorescent
lamp or interior lighting does not have sufficient illumination to charge the
rechargeable cell efficiently.
After charged fully, the watch runs without additional charging
In standard use with a smartphone
About 9 months
(the connection function is available for
about 100 days.)
• See the list on page for details of "Standard use with a smartphone".
16
Cautions when connected with a smartphone
• Long-time connection with a smartphone and reception of many notification in
a day consume much amount of power. Be sure to keep your watch sufficiently
charged when always connecting the watch with your smartphone.
• We recommend disconnecting your smartphone (page 5) when connection is
not needed.
• Take also care that your smartphone is charged enough.
24
18 6
12
M
M
Charging time (approx.)
To start working
normally when the
day
cell is discharged
12 minutes 9.5 hours
30 minutes 25 hours
1.5 hours 70 hours
8 hours −
Using with no smartphones
About 1.5 years
Power save function
The second hand stops automatically to save power when the watch has been kept in
a dark place for a certain period of time and it cannot generate power.
• The watch works normally even while saving power.
• The power save function does not operate under the following conditions:
- The crown is in position
- The mode is [CHR] or [ALM].
- The second hand indicates notification.
Canceling the power save function
The power save status ends and the hands return to normal indication as the watch
is operated or the dial is exposed to light and power generation starts.
• Power save status is also canceled as receiving time info or notification.

Adjusting the time and calendar manually

You can set the time and calendar of the [TME] mode manually.
• The local time is also corrected automatically following its setting.
1
Change the mode to [TME] (page 2) and pull the crown out to position
The second hand points the registration information currently chosen.
2
Press and hold the lower right button
S
The second hand stops at 0 second and the minute hand slightly moves.
60
3
Press and release the lower right button
indication to be corrected.
30
• Each time you press button
Hour and minute → date → year/month → day of week → (back to the top)
• The hands and indications slightly move when selected to show they become
adjustable.
4
Rotate the crown to adjust the hand/indication.
• The hour, minute and 24-hour hands move synchronously.
• Check AM/PM referring to the 24-hour hand.
• Date indication changes to the next as the function hand rotates 5 times.
• When you rotate the crown quickly a few times, the hands and date indication
will move continuously. To stop the rapid movement, rotate the crown in either
direction.
5
Repeat steps 3 and 4.
6
Push the crown in to position
finish the procedure.
Month and year indications
Set the year and month with the position of the second hand.
"Month" corresponds to one of
To become fully the 12 zones shown in the figure
charged when the
below.
cell is discharged
Each number means month.
30 hours
10
70 hours
9
−
8
7
−
2020
2021
2022
2023
Ex.: Position of the second hand when setting February 2021
You can find that the years since leap year of 2021 is "1" from the table and the
second hand must be set to the 1st minute marker of February zone.
CITIZEN CONNECTED Eco-Drive W770 Riiiver Instruction manual
or .
1 2
for 2 seconds or more.
A
A
, the target changes as follows:
A
in accordance with a reliable time source to
0
"Year" corresponds to the years
since leap year and is indicated
with markers in the zone of each
month.
12
11
1
2
S
24 60
18 6
12 30
3
M
S
24 60
M
4
18 6
5
6
30
12
M
Years since
Year
leap year
M
2032 0 (Leap year) Hour marker
2024 2028
2025 2029 2033 1
2026 2030 2034 2
2027 2031 2035 3
S
24 60
18 6
12 30
M
M
.
2
repeatedly to change the hand/
Years since leap year:
0 (Leap year)
Years since leap year: 1
Years since leap year: 2
Years since leap year: 3
0
1
2
3
Second hand position
1st min. marker
2nd min. marker
3rd min. marker
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