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