Seiko SFJ001P User manual

INSTRUCTION MANUAL FOR WATCH CALIBRE
WARNING
THIS PRODUCT CONTAINS A BUTTON BATTERY
If swallowed or placed inside any part of the body, the battery
can cause severe or fatal injuries within 2 hours or less.
Button batteries are hazardous. Keep batteries out of reach of
children.
If you think the battery may have been swallowed or
placed inside any part of the body, seek immediate medical
attention. Contact the Australian Poisons Information Centre
immediately on 13 11 26 for 24/7 fast, expert advice.
8A50

8A50 NSY8A501-A2303 D-17
8A50
INSTRUCTIONSSOLAR CHRONOGRAPH
https://www.seikowatches.com/
日本語 ..................................................
English ................................................
1
JA
1
EN
Deutsch / Français / Italiano / Español /
Pусский язык / / Português /
䬁Ổᶮ㔈 /䷂橕ᶮ㔈 / 㭛๸⧄ /
そのほかの言語の取扱説明書は、パソコンや
スマートフォンから当社ホームページ内の
「カスタマーサービス」>「取扱説明書」
にアクセスいただき、ご覧ください。
Please refer to the Instruction Manuals
of other languages by accessing
"Customer Service"→ "Instruction"
on our Website from PC or Smartphone.

Thank you very much for choosing a SEIKO watch.
For proper and safe use of your SEIKO watch,
please read carefully the instructions in this
booklet before using it.
Keep this manual handy for easy reference.
* Length adjustment service for metallic bands is available at the retailer from
whom the watch was purchased. If you cannot have your watch repaired by
the retailer from whom the watch was purchased because you received the
watch as a gift, or you moved to a distant place, please contact SEIKO
CUSTOMER SERVICE CENTER. The service may also be available on a
chargeable basis at other retailers, however, some retailers may not undertake
the service.
* If your watch has a protective film for preventing scratches, make sure to peel
it off before using the watch. If the watch is used with the film on it, dirt, sweat,
dust, or moisture may be attached to the film and may cause rust.
EN 1
CONTENTS
1 HOW TO USE
Handling cautions ............................................ 4
Characteristics ................................................ 8
Names of the parts and their functions ............ 9
Crown ............................................................ 10
Toggling between displays ............................ 12
2 HOW TO SET THE TIME
How to set the time ........................................ 14
3 HOW TO USE THE STOPWATCH
Stopwatch function ........................................ 17
The names of the parts and functions of the
stopwatch .................................................. 17
Before using the stopwatch ....................... 18
How to use the stopwatch ............................. 20
4 SOLAR CHARGING FUNCTION
Charging the battery ...................................... 25
How to charge the battery .......................... 25
Guide to charging times ............................. 26
About energy ................................................. 27
EN 2
5 TO PRESERVE THE QUALITY OF YOUR
WATCH
Power Source ................................................ 28
Daily care ...................................................... 30
Performance and type ................................... 31
Lumibrite ....................................................... 32
Water resistant performance ......................... 33
Magnetic resistant performance .................... 34
Band .............................................................. 36
How to use tri-fold type clasp for leather band
(Special clasps) ............................................. 39
How to use an easy adjust type clasp ............ 45
After sales service ......................................... 48
6 TROUBLESHOOTING
Adjusting the preliminary position of the
stopwatch hands ........................................... 50
Troubleshooting ............................................ 54
If the hands fail to move or move abnormally
even after recharging
.................................... 57
Resetting the built-in IC .............................. 57
7 SPECIFICATIONS
Specifications ................................................ 59
EN 3

Handling cautions
bWARNING
Please note that there is a risk of serious consequences such as severe injury if the following
safety regulations are not strictly observed.
Immediately stop wearing the watch in following cases:
○ If the watch body or band becomes edged by corrosion etc.
○ If the pins protrude from the band.
* Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE
CENTER.
Keep the watch and accessories out of the reach of babies and children.
Care should be taken to prevent a baby or a child accidentally swallowing the accessories.
If a baby or child swallows the battery or accessories, immediately consult a doctor, as it will be
harmful to the health of the baby or child.
Do not remove the secondary battery from the watch.
* About the secondary battery → Power Source → P.28
Replacement of the secondary battery requires professional knowledge and skill. Please ask the retailer
from whom the watch was purchased for replacement of the secondary battery.
Installation of an ordinary silver oxide battery can generate heat that can cause bursting and ignition.
EN 4
1
HOW TO USE
bCAUTION
Please note that there is a risk of minor injury or material damage if the following safety
regulations are not strictly observed.
Avoid the following places for wearing or keeping the watch:
○Places where volatile agents (cosmetics such as polish remover, bug repellent, thinners etc.) are
vaporizing
○ Places where the temperature drops below
5°C or rises above 35°C for a long time
○ Places affected by strong magnetism or static
electricity
○ Places affected by strong vibrations
○ Places of high humidity
○ Dusty places
If you observe any allergic symptoms or skin irritation
Stop wearing the watch immediately and consult a specialist such as a dermatologist or an allergist.
Other cautions
○ For adjusting the length of the metallic band, specialized knowledge and expertise are necessary.
Therefore, in such a case, contact the retailer from whom the watch was purchased. If you attempt
to adjust the metallic band, injury may occur to your hand or fingers, or parts of the band may be
lost.
○ Do not disassemble or tamper with the watch.
○ Please follow local government directions when disposing of the watch body and secondary
battery.
○ Keep the watch out of the reach of babies and children. Extra care should be taken to avoid risks
of any injury or allergic rash or itching that may be caused when you touch the watch.
○ If your watch is of the fob or pendant type, the strap or chain attached to the watch may damage
your clothes, or injure the hand, neck, or other parts of your body.
EN 5
1
HOW TO USE
bWARNING
Do not use the watch in scuba diving or saturation diving.
The various tightened inspections under simulated harsh environment, which are
usually required for watches designed for scuba diving or saturation diving, have
not been conducted on the water resistant watch with the BAR (barometric
pressure) display. For diving, use watches specifically designed for diving.
bCAUTION
Do not pour running water directly from faucet.
The water pressure of tap water from a faucet is high enough to degrade the water
resistant performance of a water resistant watch for everyday life.
EN 6
1
HOW TO USE
bCAUTION
Please note that there is a risk of minor injury or material damage if the following safety
regulations are not strictly observed.
Do not turn or pull out the crown when the watch is wet.
Water may get inside of the watch.
* If the inner surface of the glass is clouded with condensation or water droplets appear
inside of the watch for a long time, the water resistant performance of the watch is
deteriorated. Immediately consult the retailer from whom the watch was purchased or
SEIKO CUSTOMER SERVICE CENTER.
Do not leave moisture, sweat and dirt on the watch for a long time.
Be aware of a risk that a water resistant watch may lessen its water resistant
performance because of deterioration of the adhesive on the glass or gasket, or
the development of rust on stainless steel.
Do not wear the watch while taking a bath or a sauna.
Steam, soap or some components of a hot spring may accelerate the
deterioration of water resistant performance of the watch.
EN 7
1
HOW TO USE

Characteristics
This solar watch is equipped with a stopwatch function.
• This watch is equipped with a full range of stopwatch functions, capable of measuring in increments of
1/100 of a second.
• A solar cell under the dial converts any form of light into “electrical energy” to operate the watch.
* “Chronograph” means a watch with a stopwatch function.
■ Stopwatch function..................
→ P.17
The stopwatch can carry out measurements for up to 60 minutes in
increments of 1/100 of a second.
Measurement will terminate automatically after 60 minutes.
■ Solar Charging Function..........
→ P.25
The watch charges by converting light that shines on the solar panel
on the dial into electrical energy. After the battery is fully charged,
the watch will operate for about six months even if the dial is not
exposed to light.
EN 8
1
HOW TO USE
Names of the parts and their functions
1Stopwatch seconds hand
2Button B
Measuring split time/resetting the stopwatch
3Stopwatch 1/10-second hand
4Button A
Toggling between displays
5Hour hand/minute hand (stopwatch
hands)
6Button C
Starting/stopping the stopwatch
7Stopwatch 1/100-second hand
8Crown
• Normal position: Stopwatch
• First click position: Setting the time, setting
the stopwatch hands to preliminary position,
and performing a system reset
* The position and design of the display may vary depending on the model.
4
5
8
6
7
1
3
2
EN 9
1
HOW TO USE
Crown
There are two types of crowns, a normal crown and a screw down crown.
Please check the type of the crown of your watch.
While
pressing the
crown in, turn it
in the direction
indicated by
the arrow.
The
crown
turns.
The crown
does not
turn.
Normal crown
Pull out the crown and operate it.
Screw down crown
Unlock the crown before
operating it.
After operating the crown,
lock it.
Unscrew
Rotate while
pressing
the crown in.
* By locking the crown by screw, a screw down crown can prevent malfunction and increase water resistance.
* Be careful not to screw the crown in by force as it may damage the slots of the crown.
EN 10
1
HOW TO USE
EN 11
1
HOW TO USE

Toggling between displays
The operation shown in the illustration below toggles between “time display” and “stopwatch
display.”
Toggling between the displays changes the function of the hands.
<Time display> <Stopwatch display>
Hour hand
Minute hand
Stopwatch minute hand
(The hour hand and the minute hand
overlap and move in tandem)
Button A Button A
Press and release
button A
Press and release
button A
EN 12
1
HOW TO USE
* When toggling between “time display” and “stopwatch display,” the hour, minute, and stopwatch hands move.
* Pressing Button A even during stopwatch operation will toggle to “time display.”
Stopwatch measurement continues even during time display. However, split time measurements will be released.
* If the stopwatch remains in the reset state for 10 minutes, the display automatically returns to “time display.”
* The timings for 0 hours and 0 minutes and 12 hours and 0 minutes have the same hand positions during the
stopwatch display’s reset state, even in time display mode.
If it is difficult to identify the display mode by the hand positions, press Button C. If the stopwatch hand moves, the
watch is in stopwatch display mode.
EN 13
1
HOW TO USE
How to set the time
1Press Button A to toggle between displays and make sure that the watch is
working.
When the stopwatch seconds hands (1/100-second, 1/10-second, second) point to the 6 o’clock
position, the energy level is low. Expose the dial to light to charge the watch.
“Charging the battery” → P.25
“Guide to charging times” → P.26
2Press Button A to switch to time display.
“Toggling between displays” → P.12
3Pull out the crown.
The hour and minute hands move to the position of the
minute following the current time.
Ex. : When the current time is “10:08:42”, the hour
and minute hands move to the “10:09:00”
position.
* For models with screw down crown, please unlock the
crown before operating it.
EN 14
2
HOW TO SET THE TIME
5Push the crown back in to the normal position in accordance with a time signal.
The watch starts to operate.
* The telephone time signal service is helpful for setting the seconds hand exactly.
* For models with screw down crown, please be sure to lock the crown after operating it.
4Turn the crown to set the time.
Turn the crown clockwise to advance the time by
1 minute.
Turn the crown counterclockwise to set back the time
by 1 minute.
Turn the crown continuously to quickly turn the hands.
EN 15
2
HOW TO SET THE TIME

EN 16
2
HOW TO SET THE TIME
Stopwatch function
The stopwatch can measure up to 60 minutes in 1/100-second increments. After measuring
60 minutes, the stopwatch hands will automatically stop at the 0 minute 0 second position.
■ The names of the parts and functions of the stopwatch
Toggle to the “stopwatch display”. “Toggling between displays” → P.12
1Stopwatch seconds hand
moves in one-second increments
2Button B
Split/Reset
3Stopwatch 1/10-second hand
moves in 1/10-second increments
4Stopwatch minute hand
moves in one-minute increments
• The hour and minute hands move while
overlapped.
5Button C
Start/Stop
6Stopwatch 1/100-second hand
moves in 1/100-second increments
4
5
6
1
3
2
EN 17
3
HOW TO USE THE STOPWATCH
■ Before using the stopwatch
Before using the stopwatch, reset it and check that the stopwatch hands (1/100-second,
1/10-second, second, minute) are stopped at “0 seconds and 0 minutes”.
* When the stopwatch hands (1/100-second, 1/10-second, second) point to the 6 o’clock position, the energy is
depleted, and the stopwatch will not operate. Charge the stopwatch before use.
“About energy” → P.27
•How to reset the stopwatch
* The stopwatch can be operated when the crown is at the normal position.
Button B Button C
Current status
The stopwatch has
stopped.
The stopwatch is
operating.
Press Button C to make the
stopwatch hands move
EN 18
3
HOW TO USE THE STOPWATCH
Press Button C, and then
press Button B
Checking the position of the stopwatch hands after
resetting the stopwatch
The stopwatch hands have
stopped at the “0 seconds
and 0 minutes” position
The stopwatch is
reset.
The stopwatch hands have
stopped at a position other
than the “0 seconds and 0
minutes” position
Adjusting the
preliminary position of
the stopwatch hands
→ P.50
EN 19
3
HOW TO USE THE STOPWATCH

How to use the stopwatch
* The 1/100-second and 1/10-second hands move for 1 minute after starting, and remain at the 12 o’clock position
thereafter.
When the buttons are operated to stop the stopwatch or to measure a split time, the stopwatch seconds hand
displays the measured time from the restart.
If the stopwatch is restarted or a split time measurement is released, the hands move again for 1 minute.
* Pressing Button A even during stopwatch operation will toggle to “time display.”
Stopwatch measurement continues even during time display. However, split time measurements will be released.
* If the energy is depleted while the stopwatch is operating, the measurement may be reset.
* When the stopwatch hands (1/100-second, 1/10-second, second) point to the 6 o’clock position, the energy is
depleted, and the stopwatch will not operate. Charge the stopwatch before use.
“About energy” → P.27
EN 20
3
HOW TO USE THE STOPWATCH
•Standard measurement Ex. 5,000 meters running
C C B
Start Stop Reset
Start the measurement Goal Reset the stopwatch to
0minute 0 second.
Measurement example:
20 minutes and
41.82 seconds
Button C Button C Button B
EN 21
3
HOW TO USE THE STOPWATCH
•Accumulated elapsed time measurement Ex. Measuring the time for a soccer match
C C C C B
Start Stop Start Stop Reset
Start match. Stop match. Start again. The match ends. Reset the stopwatch
to 0 minute
0second.
Button C Button C Button C Button C Button B
•Restart and stop of the stopwatch can be repeated.
EN 22
3
HOW TO USE THE STOPWATCH
•Split time (intermediate elapsed time) measurement Ex. 5,000 meters running
* “Split time” is the time that has elapsed from the start of an activity to any given stage.
C B B C B
Start Split Split release Stop Reset
Start The runner passed
the P point.
The intermediate elapsed time is displayed.
(The measured time from
the start is displayed)
Goal Reset the stopwatch
to 0 minute
0second.
Button C Button B Button B Button C Button B
•Split and split release can be repeated as
many times as necessary during a
stopwatch measurement.
Example of the
intermediate
elapsed time
Start P point Goal
EN 23
3
HOW TO USE THE STOPWATCH

•Measurement of two competitors
C B C B B
Start (Split) (Stop)
(Split release)
Reset
Start First runner finishes.
Displays finishing time
of first runner
Second runner
finishes.
(Still displaying finishing
time of first runner)
Check time of
second runner.
Displays finishing time
of second runner
Reset the
stopwatch to
0minute 0 second.
Button C Button B Button C Button B Button B
Ex. Measurement of two
competitors
Start First runner finishes. Second runner finishes.
EN 24
3
HOW TO USE THE STOPWATCH
Charging the battery
■ How to charge the battery
Expose the dial to light to charge the watch.
To ensure optimal performance of the watch, make
sure that the watch is kept sufficiently charged at all
times.
Under the following situations, the energy of the watch is
likely to be depleted, resulting in stoppage of the watch:
• The watch is concealed under a sleeve.
•
The watch is used or stored under conditions where
it cannot be exposed to light for a long time.
* Be careful to make sure that the watch does not get hot when it is charging. (The operating temperature range is
-10°C to +60°C.)
* When you first start using the watch or starting it after it stopped due to a lack of charge, charge the watch sufficiently
using the table on P.26 as a guide.
EN 25
4
SOLAR CHARGING FUNCTION
■ Guide to charging times
Charge the watch using the times below as a guide.
Illuminance
lx (LUX) Light source Condition (Example)
Time required
for fully
charging the
watch
Time required
for the
stopwatch
function to be
available
Time required
for charging the
watch to last for
1 day
700 Fluorescent
light General offices - 200 hours 4.5 hours
3,000 Fluorescent
light 30 W 20 cm 260 hours 50 hours 70 minutes
10,000 Fluorescent
light 30 W 5 cm 80 hours 15 hours 20 minutes
10,000 Sunlight Cloudy day 80 hours 15 hours 20 minutes
100,000 Sunlight
Sunny day (Under
direct sunlight on a
summer day)
8 hours 2 hours 6 minutes
The “Time required for the stopwatch function to be available” figure is an estimate of the amount of time
required to expose the stopped watch to light and charge the watch until the stopwatch function is available.
Although the function can be used without charging the watch for this amount of time, the stopwatch function
may quickly become unusable. Charge the watch using these times as a guide.
* The required charging time slightly varies depending on the model of the watch.
EN 26
4
SOLAR CHARGING FUNCTION
About energy
• When the stopwatch hands point to the 6 o’clock position, the stopwatch will not operate. (This is not a
malfunction.)
• If the energy is depleted while the stopwatch is operating, the measurement may be reset.
When the energy level is low, the stopwatch
seconds hands (1/100-second, 1/10-second,
second) point to the 6 o’clock position.
If energy is completely depleted after that, all
hands move to the 12 o’clock position and the
watch stops.
When the stopwatch seconds hands
(1/100-second, 1/10-second, second) point to the
6 o’clock position, sufficiently charge the battery.
How to charge the battery → P.25
Guide to charging times → P.26
EN 27
4
SOLAR CHARGING FUNCTION

Power Source
The battery used in this watch is a special secondary battery, which is different from ordinary
batteries.
Unlike an ordinary silver oxide battery, the secondary battery does not require periodic
replacement.
The capacity or charging efficiency may gradually lower due to long-term use or operating
environment.
In addition, long-term use may shorten the charge duration due to wear, contamination, lubricant
deterioration of mechanical parts, etc. Request repair when the performance lowers.
bWARNING
■ Notes on replacing the secondary battery
• Do not remove the secondary battery from the watch.
Replacement of the secondary battery requires professional knowledge and skill.
Please ask the retailer from whom the watch was purchased for replacement of the
secondary battery.
• Installation of an ordinary silver oxide battery can generate heat that can cause
bursting and ignition.
EN 28
5
TO PRESERVE THE QUALITY OF YOUR WATCH
* Overcharge prevention function
When the secondary battery is fully charged, the overcharge prevention function is automatically
activated to avoid further charging.
There is no need to worry about damage caused by overcharging no matter how much the
secondary battery is charged in excess of the “time required for fully charging the watch.”
* For the required time to fully charge the battery, see “Guide to charging times” → P.26.
bWARNING
■ Notes on charging the watch
•When charging the watch, do not place the watch in close proximity to an intense light
source such as lighting equipment for photography, spotlights or incandescent lights,
as the watch may be excessively heated resulting in damage to its internal parts.
•When charging the watch by exposure to direct sunlight, avoid places that easily reach
high temperatures, such as a car dashboard.
• Always keep the watch temperature under 60°C.
EN 29
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Daily care
●The watch requires good daily care
• Do not wash the watch when its crown is in the extended position.
• Wipe away moisture, sweat or dirt with a soft cloth.
• After soaking the watch in seawater, be sure to wash the watch in clean pure water and wipe it dry
carefully.
Do not pour running water directly from a faucet onto the watch. Put some water into a bowl first, and
then soak the watch in the water to wash it.
* If your watch is rated as “Non-water resistant” or “water resistant for daily use,” please do not wash the watch.
“Performance and type” → P.31
“Water resistant performance” → P.33
●Turn the crown from time to time
• In order to prevent corrosion of the crown, turn the crown from time to time.
• The same practice should be applied to a screw down crown.
“Crown” → P.10
●Press the button once in a while
• Press the button once in a while to prevent corrosion of the button.
EN 30
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Performance and type
The case back shows the caliber and performance of your watch
8A50-0000
8
A
5
0
-
0
0
0
0
0
0
0
0
0
0
M
A
D
E
I
N
J
A
P
A
N
W
A
T
E
R
R
E
S
I
S
T
A
N
T
1
0
B
A
R
S
T
A
I
N
L
E
S
S
S
T
E
E
L
Water resistant
performance
Case Number
Magnetic resistant
performance
•Water resistant performance
Please refer to P.33.
•Case Number
The number to identify the type of your watch.
•Magnetic resistant performance
Please refer to P.34 and P.35.
* The above illustration is provided as an example, therefore it may not be exactly the same as your watch.
EN 31
5
TO PRESERVE THE QUALITY OF YOUR WATCH

Lumibrite
If your watch has Lumibrite
Lumibrite is a luminous paint that absorbs the light energy of sunlight and lighting apparatuses in a short
time and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux for
approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, that, as Lumibrite
emits the light it stores, the luminance level of the light decreases gradually over time. The duration of the
emitted light may also differ slightly depending on such factors as the brightness of the place where the
watch is exposed to light and the distance from the light source to the watch.
* In general, when coming from a place that is bright to a place that is dark, it takes human eyes some time to adapt
to the darkness making it difficult to see objects initially. (Dark adaptation)
* Lumibrite is luminous paint that stores and emits light, which is harmless to human beings and the environment,
containing no toxic materials such as radioactive substances.
<Brightness levels>
Condition Illumination
Sunlight Fine weather 100,000 lux
Cloudy weather 10,000 lux
Indoor (Window-side during
daytime)
Fine weather More than 3,000 lux
Cloudy weather 1,000 to 3,000 lux
Rainy weather Less than 1,000 lux
Lighting apparatus (40-watt daylight
fluorescent light)
Distance to the watch: 1 m 1,000 lux
Distance to the watch: 3 m 500 lux (Average room luminance)
Distance to the watch: 4 m 250 lux
EN 32
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Water resistant performance
Refer the table below for the description of water resistant performance of your watch before using.
(Please look at P.31.)
Indication on the
case back
Water resistant
performance Conditions of Use
No indication Non-water resistance Avoid drops of water or sweat
WATER
RESISTANT
Water resistance for
everyday life
The watch withstands
accidental contact with
water in everyday life.
bWARNING
Please do not use it for
swimming.
WATER
RESISTANT
5 BAR
Water resistance for
everyday life at 5-BAR
water resistant
The watch is suitable for sports such as swimming.
WATER
RESISTANT
10（20）BAR
Water resistance for
everyday life at 10 (20)-BAR
water resistant
The watch is suitable for diving not using an air cylinder.
EN 33
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Magnetic resistant performance
Affected by nearby magnetism,
a watch may temporarily gain or lose time or stop operating.
bDANGER
Indication on the case back Condition of use
No indication Keep the watch more than 10 cm away from magnetic products.
Keep the watch more than 5 cm away from magnetic products.
(JIS level-1 standard)
Keep the watch more than 1 cm away from magnetic products.
(JIS level-2 standard)
If the watch becomes magnetized and its accuracy deteriorates to an extent exceeding the specified rate
under normal use, the watch needs to be demagnetized. In this case, you will be charged for
demagnetization and accuracy readjustment even if it happens within the guarantee period.
The reason why a watch is affected by magnetism
The built-in motor is provided with a magnet, which may be influenced by a strong external magnetic field.
EN 34
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Examples of common magnetic products that may affect watches
Smartphone, cellular phone, tablet terminal
(Speaker, magnet of cover)
AC adapter Bag
(With magnet
buckle)
AC-powered
shaver
Magnetic
cooking device
Portable radio
(Speaker)
Magnetic
necklace
Magnetic health
pillow
EN 35
5
TO PRESERVE THE QUALITY OF YOUR WATCH

Band
The band touches the skin directly and becomes dirty with sweat or dust. Therefore, lack of care
may accelerate deterioration of the band or cause skin irritation or stain on the sleeve edge.
The watch requires a lot of attention for long usage.
●Metallic band
•Moisture, sweat or soil will cause rust even on a stainless steel band if they are left for a long time.
•Lack of care may result in a rash or cause a yellowish or gold stain on the lower sleeve edge of shirts.
• Wipe off moisture, sweat or soil with a soft cloth as soon as possible.
• To clean the soil around the joint gaps of the band, wipe it out in water and then brush it off with a soft
toothbrush.
(Protect the watch body from water splashes by wrapping it up in plastic wrap etc.)
Clean it off with a soft cloth.
• Because some titan bands use pins made of stainless steel, which has outstanding strength, rust may
form in the stainless steel parts.
• If rust advances, pins may poke out or drop out, and the watch case may fall off the band, or the clasp
may not open.
• If a pin is poking out, personal injury may result. In such a case, refrain from using the watch and request
repair.
EN 36
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●Leather band
•A leather band is susceptible to discoloration and deterioration from moisture, sweat and direct sunlight.
• Wipe off moisture and sweat as soon as possible by gently blotting them up with a dry cloth.
• Do not expose the watch to direct sunlight for a long time.
• Please take care when wearing a watch with light-colored band, as dirt is likely to show up.
•
Refrain from wearing a leather band watch other than Aqua Free bands while bathing, swimming, and
when working with water even if the watch itself is water resistant enforced for daily use (10-BAR/20-BAR
water resistant).
●Fabric band (Nylon/Polyester)
• Natural skin oil and dirt easily adhere to the band because it has a braided structure.
• Beware of fraying, damage, etc., caused by catching this product on other things.
• Note that the band may become discolored due to friction when wet with sweat or rain and that its color
may transfer to other clothing.
• Beware of static electricity caused by friction with clothing material.
• If natural skin oil or dirt adheres to the band, gently wipe it off immediately with a dry cloth, etc.
• When drying the band, dry it in an airy place out of direct sunlight.
• The texture of the band may change if it is washed in water for a long time.
• Note that the band may discolor if it is left in direct sunlight.
EN 37
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●Silicone band
• As for material characteristics, the band is easily dirtied, and may be stained and discolored.
Wipe off dirt with a wet cloth or cleaning tissue.
• Unlike bands of other materials, cracks may result in the band being cut. Take care not to damage the
band with an edged tool.
Notes on skin
irritation and
allergy
Skin irritation caused by a band may result from various factors such as allergy to
metals or leathers, or skin reactions against friction on dust or the band itself.
Notes on the
length of the band
Adjust the band to allow a little clearance with your wrist to ensure proper
airflow.
When wearing the watch, leave enough room to insert a finger between
the band and your wrist.
EN 38
5
TO PRESERVE THE QUALITY OF YOUR WATCH
How to use tri-fold type clasp for leather band (Special clasps)
There are 3 types of special clasps as described below;
If the clasp of the watch you purchased is one of them, please refer to the indications.
AA Type → P.40
BB Type → P.41
CC Type → P.42
EN 39
5
TO PRESERVE THE QUALITY OF YOUR WATCH

AA Type
1Lift up the clasp to release the buckle.
Fixed loop
Movable loop
Buckle
Flap
2Open the flap.
3
Remove the pin from the adjustment hole. Slide the
band left and right, and reinsert the pin into the
adjustment hole at an appropriate length.
Pin
Adjustment hole
4Fasten the flap.
* Do not push the flap in too hard.
* When fastening the clasp, insert the tip of the band
into the movable loop and fixed loop, and then,
securely tighten the clasp.
EN 40
5
TO PRESERVE THE QUALITY OF YOUR WATCH
BB Type
1While pressing the push buttons on both sides
of the flap, lift to open the clasp.
Push button
2Remove the pin from the adjustment hole.
Slide the band left and right, and insert the pin
into the adjustment hole at an appropriate
length. Push the buckle and fasten the clasp.
Buckle
Pin
Adjustment hole
EN 41
5
TO PRESERVE THE QUALITY OF YOUR WATCH
CC Type
●How to wear or take off the watch
1While pressing the push buttons on both sides
of the flap, pull the band out of the movable
loop and fixed loop. Then open the clasp.
Fixed loop
Movable loop
Buckle
Flap
Push button
2Place the tip of the band into the movable loop
and fixed loop, and fasten the clasp by
pressing the frame of the buckle.
EN 42
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●How to adjust the length of the band
1While pressing the push buttons on both sides
of the flap, pull the band out of the movable
loop and fixed loop. Then open the clasp.
Fixed loop
Movable loop
Buckle
Flap
Push button
2Press the push buttons again to unfasten the
flap.
EN 43
5
TO PRESERVE THE QUALITY OF YOUR WATCH

3Pull the pin out of an adjustment hole of the
band. Slide the band to adjust its length and
find an appropriate hole. Place the pin into the
hole.
Pin
Adjustment hole
Pin
Adjustment hole
4Fasten the flap.
EN 44
5
TO PRESERVE THE QUALITY OF YOUR WATCH
How to use an easy adjust type clasp
Some bands are provided with an easy adjust type clasp for fine adjustment of the band’s length.
If the clasp of the watch you purchased is as follows, please refer to the following instructions.
* The band can be lengthened by up to about 5 mm.
This is useful if the band feels too tight or is uncomfortable for some reason.
EN 45
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●How to wear the band (Opening and closing the clasp)
Push button Buckle
1. Lightly press the push buttons to open the
clasp.
* Note that pressing the push buttons too
firmly (deeply) actuates the adjuster, which
lengthens the band.
2. Fasten the clasp by pressing the frame of
the buckle.
EN 46
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●How to adjust the length of the band
1. You can lengthen the band by up to about 5 mm
(2 stages) by firmly pressing the push buttons
from both sides to actuate the adjuster.
2. Fasten the clasp by pressing the frame of the
buckle.
* Even while the clasp is closed, you can still retract
the length of band extended by the adjuster.
* The above illustrations are provided as examples. Some details may differ depending on the model.
EN 47
5
TO PRESERVE THE QUALITY OF YOUR WATCH

After sales service
●Notes on guarantee and repair
• Contact the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE CENTER
for repair or overhaul.
• Within the guarantee period, present the certificate of guarantee to receive repair services.
• Guarantee coverage is provided in the certificate of guarantee.
Read carefully and retain it.
• For repair services after the guarantee period has expired, if the functions of the watch can be restored
by repair work, we will undertake repair services upon request and payment.
●Replacement with functional parts
• Please keep in mind that if original parts are not available, they may be replaced with substitutes whose
outward appearance may differ from the originals.
EN 48
5
TO PRESERVE THE QUALITY OF YOUR WATCH
●Inspection and adjustment by disassembly and cleaning (Overhaul)
• Periodic inspection and adjustment by disassembly and cleaning (overhaul) is recommended
approximately once every 3 to 4 years in order to maintain optimal performance of the watch for a long
time. According to use conditions, the oil retaining condition of your watch mechanical parts may
deteriorate, abrasion of the parts may occur due to contamination of oil, which may ultimately lead the
watch itself to stop.
As the parts such as gasket may deteriorate, water-resistant performance may be impaired due to
intrusion of perspiration and moisture.
Please contact the retailer from whom the watch was purchased for inspection and adjustment by
disassembly and cleaning (overhaul). For replacement of parts, please specify “SEIKO GENUINE
PARTS.” When asking for inspection and adjustment by disassembly and cleaning (overhaul), make
sure that the gasket and push pin are also replaced with new ones.
• When your watch is inspected and adjusted by disassembly and cleaning (overhauled), the movement
of your watch may be replaced.
EN 49
5
TO PRESERVE THE QUALITY OF YOUR WATCH
Adjusting the preliminary position of the stopwatch hands
If the stopwatch hands (1/100-second, 1/10-second, second, minute) do not stop at 0 minute
0 seconds and 0 minutes even after the stopwatch is reset, or if the hour and minute hands do
not display the correct time, the preliminary positions may be misaligned.
Adjusting the hands to the preliminary position will ensure that stopwatch measurements are
correct.
The preliminary position may be misaligned due to the following reasons.
• In the case of a strong impact: Misalignment may occur when dropping or hitting the watch.
• In the case of a magnetic influence: Misalignment may occur when bringing the watch close to an object
which generates magnetism.
“Examples of common magnetic products that may affect watches” → P.35
1Press Button A to toggle between displays and make sure that the watch is
working.
When the stopwatch seconds hands (1/100-second, 1/10-second, second) point to the 6 o’clock
position, the energy level is low. Expose the dial to light to charge the watch.
“Charging the battery” → P.25
“Guide to charging times” → P.26
2Press Button A to switch to stopwatch display.
“Toggling between displays” → P.12
EN 50
6
TROUBLESHOOTING
Press and
hold Button
A for
2seconds
3Pull out the crown.
* For models with screw down crown, please unlock the
crown before operating it.
4Press Button A (for 2 seconds) until the
seconds hand moves.
All hands point to the current preliminary position.
The hour hand then moves slightly.
EN 51
6
TROUBLESHOOTING

5Set all hands to the 12 o’clock standard position.
Check that each hand is aligned with the 12 o’clock position in the order shown below, and correct the
hand positions if they are misaligned.
1Turn the crown to set the hand to the 12 o’clock position
2Press Button A to advance to the next hand position adjustment
* The selected hand moves slightly or completes a full rotation to indicate that it is ready to be aligned.
Repeat 1and 2and set all hands to the 12 o’clock position.
AAA
AA
Aligning the minute handAligning the hour hand
Adjusting the stopwatch
seconds hand position
Adjusting the stopwatch
1/10-second hand position
Adjusting the stopwatch
1/100-second hand position
Press
Button A
Press
Button A
Press
Button A
Press
Button A
Press
Button A
EN 52
6
TROUBLESHOOTING
6Push the crown back in to the normal position.
The watch returns to stopwatch display.
EN 53
6
TROUBLESHOOTING
Troubleshooting
Troubles Possible causes Solutions
Reference
The watch stops
operating.
The energy is depleted.
If you wear the watch every day and
this occurs, the most likely cause is
the watch is hidden by your sleeves
or other clothing when you wear it
and it is not sufficiently exposed to
light. Sufficiently charge the battery.
When you wear the watch, try to make
sure that the watch is not hidden by
your sleeves or other clothing.
Additionally, when you take the watch
off, try to place it in a bright place.
P.25
The stopwatch
seconds hands
(1/100-second,
1/10-second,
second) point to
the 6 o’clock
position.
The energy is low.
If you wear the watch every day and
this occurs, the most likely cause is
the watch is hidden by your sleeves
or other clothing when you wear it
and it is not sufficiently exposed to
light.
The hands move
slowly when
toggling between
modes.
EN 54
6
TROUBLESHOOTING
Troubles Possible causes Solutions
Reference
Stopwatch hands
do not point to the
12 o’clock
position or do not
move after
charging a
stopped watch.
The internal watch system is
unstable.
See “Resetting the built-in IC” and
follow the procedure. P.57
The light is too weak.
More time is required to fully charge
the watch.
The time taken to charge will differ
depending on the light intensity. For
details on charging times, see
“Guide to charging times”. If the
hands still fail to resume operation,
follow the procedure of “Resetting
the built-in IC”.
P.26
P.57
The watch
temporarily gains/
loses time.
The watch has been left in extremely
high or low temperatures for a long
time.
If the watch returns to room
temperature, the accuracy will return
to its original state.
If it does not return to its original
state, contact the retailer from whom
the watch was purchased.
-
The watch has been left close to an
object with a strong magnetic field.
Correct this condition by moving and
keeping the watch away from the
magnetic source, and reset the time.
If this action does not correct the
condition, contact the retailer from
whom the watch was purchased.
-
You drop the watch, hit it against a
hard surface, or wear it while playing
active sports.
The watch is exposed to strong
vibrations.
If accuracy does not return after
setting the time, consult the retailer
from whom the watch was purchased.
-
EN 55
6
TROUBLESHOOTING

Troubles Possible causes Solutions
Reference
Any of the
stopwatch hands
do not return to
the 0 minute
0second position
when the
stopwatch is
reset.
The preliminary position of the
hands is out of alignment.
This happens when the stopwatch
hands are out of the preliminary
position as a result of external
influence or system reset.
Set the preliminary hand position. P.50
The buttons do
not work.
(The stopwatch
function is
unavailable or the
time/preliminary
position cannot be
adjusted)
The power is low.
Sufficiently charge the battery until
the stopwatch function is available
or the time/preliminary position can
be adjusted.
P.25
Blur in the display
persists.
A small amount of water has got
inside the watch due to deterioration
of the gasket, etc.
Consult the retailer from whom the
watch was purchased. -
* Contact the retailer from whom the watch was purchased for any other troubles.
EN 56
6
TROUBLESHOOTING
If the hands fail to move or move abnormally even after recharging
If the watch does not work, the stopwatch hands do not point to the 12 o’clock position even if
the battery is sufficiently charged, or the watch operates irregularly, performing the following
operations will return the watch to normal.
■ Resetting the built-in IC
A
BC
Press at the
same time for
2seconds
1Pull out the crown.
* For models with screw down crown, please unlock the
crown before operating it.
2Press buttons A, B, and C at the same
time for 2 seconds.
EN 57
6
TROUBLESHOOTING
3Set the stopwatch hands (1/100-second, 1/10-second, second, minute) to the
preliminary position.
Carry out the operation in Procedure 5 of “Adjusting the preliminary position of the stopwatch hands”
→ P.52.
4Push the crown back in to the normal position.
The watch starts to operate.
At this time, the time display shows 12 hours and 0 minutes.
When the stopwatch seconds hands (1/100-second, 1/10-second, second) point to the 6 o’clock
position, the energy level is low. Expose the dial to light to charge the watch.
“Charging the battery” → P.25
“Guide to charging times” → P.26
5Set the time.
Carry out the operation in Procedure 3 of “How to set the time” → P.14.
Once the stopwatch hands, preliminary position, and time are set, the operation is complete.
EN 58
6
TROUBLESHOOTING
Specifications
Cal. 8A50
1. Features Main time with two hands (hour and minute hands), stopwatch hands
(1/100-second, 1/10-second, second, and minute hands)
2. Frequency of crystal
oscillator 32,768 Hz (Hz= Hertz, cycles per second)
3. Loss/gain (Monthly rate) Monthly average loss/gain ± 15 seconds
Only if worn on the wrist in a temperature range of 5°C to 35°C
4. Operational temperature
range -10 °C ~ +60 °C
5. Driving system Step Motor, 5 pieces
6. Power source Secondary battery, 1 piece
7. Duration Approx. 6 months (if the stopwatch is used for 1 hour per day.)
8. IC (Integrated Circuit) Oscillator, frequency divider and driving circuit C-MOSIC, 1 piece
* The specifications are subject to change without prior notice due to product improvements.
EN 59
7
SPECIFICATIONS