Citizen u680 User manual

この時計は、バンドをのぞくすべての修理が「メーカー修理」となり
ます。修理、点検の際は弊社お問い合わせ窓口へご依頼ください。
All parts of this watch, excluding the band, are to be repaired only
by CITIZEN. Please have all inspections and repairs at a customer
support center.
本表的所有零配件，除表带外，其余所有维修仅限在西铁城
公司进行。请在客户支持中心进行所有的检查和维修。
http://citizen.jp/
Cal.U680
HCR01 Cal. U680
取扱説明書
HCR01
CT065
②
HCR01-2

107
Thank you for your purchase of this Citizen watch.
Before using the watch, read this instruction manual carefully to ensure correct use.
After reading, be sure to store this manual in a safe place should it be needed for
future reference.
Visit the Citizen website (http://www.citizenwatch-global.com/) to view
visual guides for operation of your watch.
Some models may be equipped with external features (calculation scale,
tachymeter, etc.). Visual guides for operation of such external features can
also be found on the website.
To check the movement number
A case number− 4 alphanumeric characters and
6 or more alphanumeric characters−is engraved
on the case back. (Figure on the right)
The first 4 characters of the case number
represent the movement number of the watch.
In the example on the right, “
△△△△ ” is
the movement number.
<Engraving position example>
The engraving position may differ
depending on watch model.

108
Safety precautions (IMPORTAMT)
This manual contains the following instructions that should be strictly followed at all times to
prevent injury to yourself and other persons as well as damage to property.
Safety advisories are categorized and depicted in this manual as follows:
DANGER
WARNING
CAUTION
Can cause serious injury or death
Highly likely to cause death or serious injury
Can or will cause minor or moderate injury or damage
Warning (caution) symbol followed by instructions that should be followed or
precautions that should be observed
Warning (caution) symbol followed by prohibited matters.
Important instructions are categorized and depicted in this manual as
follows:

109
Protective Stickers
Be sure to remove any protective stickers that may be on your watch (case back,
band, clasp, etc.) Otherwise, perspiration or moisture may enter the gaps between the
protective stickers and the parts, which may result in a skin rash and/or corrosion of
the metal parts.
Band adjustment
We recommend seeking the assistance of an experienced watch technician for sizing
of your watch. If adjustment is not done correctly, the bracelet may unexpectedly
become detached leading to loss of your watch or injury.
Consult your nearest authorized Citizen Service Center.

110
■World Time Eco-Drive
Radio Controlled Watch ■
This watch is a radio controlled watch that receives standard time radio
waves broadcast from Japan, the USA, Europe (Germany) and China in
order to correct the time and date.
The radio controlled watch has no effect on the human body or medical equipment.
■Fully charge your watch before use by
exposing it to sufficient light ■
The second hand will move at 2-seconds intervals when the watch is insufficiently
charged. Charge your watch as indicated in “Guide to Charging Time” .
* Charge the watch in direct sunlight for a long time once a month.

111
• The illustrations shown in this manual may differ from the actual watch you have purchased.
Part Names (1)
Charge level indicator/
radio wave reception
indicator
Home time hour hand
Digital display 2
(Displays the home city)
Home time second
hand Mode hand
UTC hour hand UTC minute hand
Home time minute
hand
Button (B)
24-hour hand
Crown
Button (A)
Digital display 1
(Displays world city/
world time)
Crown for turning
the outside scale

112
Note: To assist in the explanation, all parts of the digital display are shown in the illustration.
Part Names (2): Digital Displays
[Digital display 2] [Digital display 1]
World city name
Morning: A
Afternoon: P
Chronograph
measurement mark
Timer measurement mark
Alarm setting mark
Daylight saving time setting
mark
Home city name
Insufficient charge
warning mark
World city time
Hour/minute/second

113
Part Names (3): Radio Wave Reception Display
NO: Signal reception failed RX: Reception in progress H, M, L: Reception level/
reception status
Modes where reception is
possible: CAL, TME and
RX-S
JPN: JJY (Japan)
USA: WWVB (USA)
EUR: DCF77 (Germany)
CHN: BPC (China)

114
Table of Contents
1. Your Watch .............................................................................................. 117
2. Before Use.............................................................................................. 120
 •CheckingtheReferencePosition ...................................................... 122
3. Basic Watch Operations ....................................................................... 124
Radio Signal Reception
4. Radio Signal Reception......................................................................... 126
5. Poor Reception Areas ........................................................................... 130
6. Display during Reception ..................................................................... 131
7. Confirming Reception Status ............................................................... 132
8. Reception Area Guidelines ................................................................... 134
9. World City Display ................................................................................. 138

115
Operations in Each Mode
10. Changing Mode...................................................................................... 142
11. Using Home Time and World Time....................................................... 144
12. Using Daylight Saving Time ................................................................. 146
13. Setting the Time (TME).......................................................................... 147
14. Setting the Calendar (CAL)................................................................... 151
15. Using the Timer (TMR) .......................................................................... 154
16. Using the Chronograph (CHR) ............................................................. 158
17. Using the World Time Setting (WT-S) .................................................. 160
18. Using the World Time Alarm (AL-1 and 2)........................................... 164
19. Using the Receive Setting (RX-S) ........................................................ 166
20. LED Lights.............................................................................................. 170
21. Resetting Your Watch............................................................................ 170
22. Adjusting the Reference Position ........................................................ 172
Solar Power
23. Solar Power Function............................................................................ 176

116
24. Characteristics of the Eco-Drive Watch .............................................. 178
A. Power Saving Function .................................................................... 180
B. Insufficient Charge Warning Function ............................................ 182
C. Overcharging Prevention Function................................................. 183
D. Guide to Charging Time ................................................................... 184
E. Charge Level Display........................................................................ 186
F. Handling Your Solar Powered Watch............................................... 188
Troubleshooting
Radio Signal Reception Function ........................................................ 190
Eco-Drive................................................................................................ 194
Precautionary Items and Usage Limitation............................................... 196
25. Specifications ........................................................................................ 204
Warranty and After-Sales Service.............................................................. 208
To Customers with Reception Problems................................................... 210
Customer Support Center............................................................................ 211

117
■ 1. Your Watch
<Radio Signal Reception Function>
This watch is a radio controlled watch, which receives the standard time radio waves that are
broadcast from radio wave transmitters in four regions, Japan, the USA, Europe (Germany) and
China, and uses these waves to automatically correct the time and date.
P. 126
◎Automatic reception: The watch will automatically receive the radio wave up to three
times a day, at 2 a.m., 3 a.m. and 4 a.m., and adjust the time and date accordingly.
The 4 a.m. automatic reception can be changed to any time of the day.
◎On demand reception function: The radio wave can be received at any time of the day
to adjust the time and date.
<World Time Function>
◎ UTC (Coordinated Universal Time), the time and date of 43 cities (or regions) from around
the world and one city (any can be set) can be displayed and easily called up. It is
convenient when traveling overseas on business or vacation.
Daylight saving time can also be set. P. 144

118
<Solar Power Function>
This is a multi-functional Eco-Drive watch, which is equipped with a solar power
function for powering the watch by converting light energy into electric energy.
◎Charge level display function: This function displays the charge level in four
grades, to give an approximate indication of how much the rechargeable cell is
charged. P. 186
◎Power saving function: The watch is equipped with two power saving functions.
If the watch face is not exposed to light for 30 minutes or longer, all the LCD display
sections turn off (Power saving 1). If the watch face is then not exposed to light for
one week or longer, some of the watch’s functions are stopped in order to minimize
the watch’s power consumption (Power saving 2). P. 180

119
The watch integrates three functions, a JIS Type 1 magnetic resistance watch* function, shock
detection function, and Automatic hand correction function, in order to prevent hand misalignment
caused by external factors such as impacts or magnetism.
* JIS: Japanese Industrial Standards
A JIS Type-1 antimagnetic watch (able to withstand a direct-current field of 4,800 A/m)
maintains its time functionality as close as 5 cm away from devices that generate a magnetic
field during normal use.

120
■2. Before Use
[Insufficient charging]
Charge level
indicator
[Fully charged]
Check the movement of
the second hand.
The second hand is
moving at 2-second
intervals or is stopped.
The second hand is
moving at 1-second
intervals.
Charge the watch
sufficiently by placing it in
direct sunlight as indicated
in “Guide to Charging
Time”.
NO: Signal
reception failed
RX: Reception
in progress Reception level/
reception status
H: High
M: Middle
L: Low
Crown
Button (A)
Mode hand

121
Check the
reception status.
• Pull out the crown to
position 1.
• Turn the crown to
align the mode hand
with TME.
• Return the crown to
the normal position.
• Press the lower right
button (A) at the 4:00
position.
The second
hand indicates
a reception
status of H, M
or L
The second
hand indicates
a reception
status of NO
Refer to “On Demand
Reception” to perform the
radio wave reception.
Before Use
Your watch is
correctly receiving
the standard time
radio wave.
It is ready to use.
If you are unable to
receive radio waves,
please inquire to the
Citizen Consumer Help
Desk at 0120-78-4807.

[Checking the Reference Position]
Before using the watch, confirm that the hands are aligned with
“0”, similar to when setting weighing scales
◎The reference position may become misaligned when
the watch is exposed to strong magnetism, static
electricity or impacts. Even if radio waves are received,
the correct time will not be indicated unless the watch
hands are aligned to the correct reference position.
Check that the hands are properly aligned with “0”.
Examples of magnetic products that can affect
the watch.
• Health products (for example, medical necklaces and waist
bands that have magnetic fields)
• Refrigerators (magnetic part of the door)
• Electromagnetic cookers
• Bags (with magnet fasteners)
• Mobile phones (speaker part)
Keep the watch away from items similar to those above.
122

123
1. Pull the crown out to position 1 and turn to align
the mode hand with CHR (chronograph mode).
2. Pull out the crown to position 2.
• The hands will move rapidly, stopping at the
reference position recorded in the watch memory.
Correct reference positions
Charge level indicator: CHN
UTC hour and minute hands: 12:00
Hour, minute and second hands: 12:00:00
24-hour hand: 12:00
3. If the reference position is correct, the check is
now complete. Press the crown back into its
normal position.
• If a position is incorrect, refer to “Adjusting the
Reference Position” (P.172) and adjust it to the
correct position.
Hour, minute and
second hands
UTC hour and
minute hands
24-hour
hand
Charge level
indicator
Mode hand

124
■3. Basic Watch Operations
* The watch receives the radio wave from the radio wave transmitter located in the
home city’s region.
1.
Check the
charge
level.
2.
Set the home city.
If the city in which you are
situated is displayed in
digital display 2,
(1) Pull out the crown to
position 1 and turn to align
the mode hand with TME.
(2) With the crown pulled out to
position 1, press button (A)
or (B) to call up the home
city in digital display 1.
(3) Press button (A) and button
(B) at the same time to
display the home city in
digital display 2.
Home time
hour hand
Home time
minute hand
Digital display 1
Button (A)
Button (B)
Home time second hand
Home city
(Digital display 2)
Crown

125
3.
Set the home time.
If the home time is correct,
(1) Set the time manually
(2) Set the time by receiving the
radio wave
Caution:
If the home city is set to a city
that is outside the reception area,
the radio wave cannot be
received.
Set the time manually.
4.
Set digital display 1.
The world time or date can be
displayed on digital display 1.
Also, the mode can be switched in
order to use the alarm, timer or
chronograph.