Citizen Eco-Drive ES4 Series User manual

2
* Notice
All repairs performed on this watch are to be performed
at the CITIZEN.
When desiring to have your watch repaired or inspected,
please contact the Citizen Service Center.

3
English
<This radio controlled watch receives standard radio signals broadcast from
Germany>
This is a radio controlled watch; it has the Automatic reception function and On demand
reception function. Every day at 3 a.m. or 4 a.m., the watch automatically receives a
radio signal and adjusts the time (Automatic reception), or the signal can be received and
the time adjusted at any desired time (On demand reception).
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-second intervals when the watch is insufficiently
charged. Charge your watch as indicated in “Guide to Charging Time” (p. 40).
• Charge the watch in direct sunlight for a long
time once a month.

4
[Part Names]
Hour hand
Second hand
Button (B)
Minute hand
Crown
Button (A)
Reception status: OK Receiving: RX
* The illustrations shown in this manual may differ from the actual watch you have purchased.
Reception status: NO
Reception status
Summer time setting

5
• Depending on the particular watch model, some indicate the reception status and
daylight saving setting with the long side of the second hand, while others indicate
with the short side of the second hand.
* Depending on the particular watch model,
some do not have an “S” indication.
Reception status
Long side of the hand
Short side of the hand
Long side of the hand
Short side of the hand
Summer time setting

6
Table of Contents
1. Your Watch .................................................................................................. 8
2. Operating the Crown .................................................................................. 9
3. Before Use ................................................................................................. 10
• Checking the Reference Position ............................................................ 12
4. Functions List ............................................................................................ 14
Radio Signal Reception
5. For Best Reception .................................................................................... 16
6. Poor Reception Areas ................................................................................ 17
7. Receiving the Radio Signals ...................................................................... 18
• Automatic Reception .............................................................................. 18
• On Demand Reception ............................................................................ 18
• Recovery Automatic Reception ............................................................... 19
• Confirming the Reception Status ............................................................ 20
• Reception Area Guidelines ...................................................................... 22
8. Setting the Summer Time ......................................................................... 24

7
Setting the Time Manually
9. Setting the Time ........................................................................................ 26
10. Correcting the Time Difference ................................................................. 28
11. Correcting the Reference Position ............................................................ 30
Eco-Drive
12. Solar Power Function ................................................................................ 32
13. Characteristics of the Eco-Drive Watch ..................................................... 34
• Power Saving Function ........................................................................... 36
• Insufficient Charge Warning Function .................................................... 38
• Overcharging Prevention Function ......................................................... 39
• Guide to Charging Time .......................................................................... 40
• Handling Your Eco-Drive Watch .............................................................. 42
Troubleshooting ............................................................................................. 44
Precautions ..................................................................................................... 48
14. Specifications ........................................................................................... 54

8
1. Your Watch
◎Automatic reception function: Every morning at 3 a.m. and 4 a.m. the watch will
automatically receive a signal and adjust the time.
However, if reception is successful at 3 a.m., automatic reception will not be
performed at 4 a.m.
◎On demand reception function: The radio signals can be received at any time of
the day to adjust the time.
◎Eco-Drive function: This solar powered Eco-Drive watch is equipped with a solar
power function for powering the watch by converting light energy into electric
energy. The watch incorporates a power saving function that reduces the electrical
power consumption when the watch face is not exposed to light.
◎Time zone adjustment function: The watch incorporates a convenient time zone
adjustment function (±27 hours).
A simple method is available for changing to the local time if you are going to an area
in a different time zone.
◎Daylight saving function: Summer time can easily be set.

9
2. Operating the Crown
There are two models available for the crown: normal and screw lock.
<Operating the Screw Lock Crown>
• When the screw lock is
released, the crown pops out
a little and stops in the
normal position.
After finishing the
operation, lock the
crown again.
• Turn the crown to
the left.
<Moving the Hands Continuously>
When the crown is pulled out to the position 1 and
quickly turned to the left or right (more than 2
clicks), the hands will rotate continuously.
To stop the continuous movement of the hands, turn
the crown to the left or right by one click.
* A gentle “click” can be felt by the fingertips.
Using the side of your finger, quickly turn
the crown by two or more clicks.
Turn to
the left

10
3. Before Use
Check the movement of
the second hand
Charge the watch sufficiently
by placing it in direct sunlight
as indicated in “Guide to
Charging Time” (p. 40).
OK: Reception
successful
RX: Receiving
NO: Signal reception
failed
Button (A)
The second hand is
moving at 1-second
intervals.
The second hand is
moving at 2-second
intervals.

11
Check the
reception status
by pressing lower
right button (A).
The second
hand indicates
a reception
status of OK
The second
hand indicates
a reception
status of NO
The second hand is moving at 1-second intervals.
Refer to “On Demand
Reception” (p. 18) to
perform the radio wave
reception.
Your watch is
correctly receiving
the standard time
radio wave.
It is ready to use.

12
[Checking the Reference Position]
Before using the watch, check 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.

13
◎Check that the reference position aligns
correctly in the 12:00:00 position.
1. With the crown in the normal position, press
the upper right button (B) continuously for
about 5 seconds.
2. Release the upper right button (B) when the
second hand begins to move.
The hands will move rapidly, stopping at the
reference position recorded in the watch
memory.
Correct reference position
12:00:00
◎The hands are aligned with the 12:00:00
position.
Reference position is incorrect
◎The hands are not aligned with the 12:00:00 position.
Pull out the crown and correct the reference position. (p. 30)
Button (B)
Crown
Check the
reference
position
Reference position
is correct Press the upper right button (B), or leave the
watch for 2 minutes, and the hands will return to
their normal movement.

14
Function
On demand reception
(p. 18)
Confirm reception status
(p. 20)
Time difference setting
(p. 28)
Summer time setting (p. 24)
Setting the time manually
(p. 26)
Button or crown operation
Press lower right button (A) for more than
2 seconds and release when the second
hand stops in the RX position.
Press lower right button (A) once.
Press the upper right button (B) once, turn
the crown to set the time difference, and
press the upper right button (B) once more
to complete the operation.
Press the lower right button (A) once, then
within 10 seconds press the upper right
button (B).
Pull out the crown to position 1.
4. Functions List
Button (B)
Crown
Button (A)

15
Hand movement
• The second hand will stop at RX and reception will begin.
• The second hand will stop at OK or NO.
• The second hand will stop at the 12:00 position. (If a time difference setting has been made, it will
stop at the position appropriate for the time difference.)
• The second hand at the 12:00 position indicates time difference of ±0 hours. Turn the crown to set
the time difference. One step of the second hand indicates a one hour time difference.
• The second hand will stop at the reception status confirmation position (OK or NO).
• If the upper right button (B) is pressed, the second hand will indicate summer time setting, “0” (off)
or “+1” (on).
• Turn the crown to the right to select “0” (off), or to the left to select “+1” (on).
• Press button (A) or (B) to complete the operation. If the watch is left, the hands will return to their
normal movement after 10 seconds.
Second hand, minute hand, hour hand:
• Turn the crown to the right to rotate the second hand clockwise once and move the minute hand
ahead by 1 minute.
• Turn the crown to the left to rotate the second hand counterclockwise once and move the minute
hand back by 1 minute.
Turn the crown quickly to move the hour and minute hands continuously.

16
Radio Signal Reception
5. For Best Reception
There are three kinds of reception: automatic
reception, on demand reception, and recovery
automatic reception.
When the radio signal has been properly received,
your watch will automatically adjust the time.
When reception is complete, each of the hands will
move either clockwise or counterclockwise to the received time.
Remove the watch from your wrist and place on a stable surface near a window where the radio
signal can be easily received, pointing the 9:00 position in the direction of the radio signal
transmitter.
Do not move the watch during reception.
• Reception may be difficult due to the surroundings or metal shielding.
When inside a building, place the watch as close to a window as possible for good reception.
• Radio signal reception may be difficult during the hours around sunrise and sunset.
Avoid attempting to receive radio signals during these times.

17
6. Poor Reception Areas
It may be difficult to properly receive the radio signals under certain environmental
conditions or in areas susceptible to radio noise.
●Inside reinforced concrete buildings
Between tall buildings or
mountains, or underground
●Near cellular
phones that are
in use
●Inside vehicles, including
cars, trains and aero
planes
●Near TVs, refrigerators,
computers, fax machines and other
electrical equipment or office
appliances
●Extremely hot or cold locations ●Near high-tension electrical
lines, railway overhead wires
or communication facilities

18
7. Receiving the Radio Signals
Automatic Reception
◎Place the watch in a stable location near a window where the radio signal can be
easily received with the 9:00 position pointing towards the transmitter. The watch
will receive the radio signals at 3 a.m. every day. If a signal cannot be received at 3
a.m., it will try again automatically at 4 a.m.
On Demand Reception (Manual Reception)
Signals can be received at any time.
Use this function when automatic reception is impossible due to changes in the reception
environment.
(Depending on the weather or noise conditions, reception can take up to 15 minutes.)
1. Remove the watch from your wrist and place on a stable surface near a window where
the radio signal can be easily received, pointing the 9:00 position in the direction of
the radio signal transmitter.