How To Use The Diver Adjuster ･････････････････････････････････････70; Lumibrite ････････････････････････････････････････････････････････････71; To Preserve The Quality Of Your Watch ･･･････････････････････････72; Trouble Shooting - Seiko PROSPEX 5R66 Instruction Manual

■HOW TO USE THE DIVER ADJUSTER
The Diver Adjuster is a bracelet mechanism to adjust the bracelet length of your Diver' s
Watch. It is very useful when you wear the watch over a wet suit.
1. Lift up the flap approximately 90° until it stands upright. Do not extend the slider at this step.
2. Lightly push back the flap further approximately 20° .
When doing so, take care not to push the flap forcibly as more force is required to do so
than to lift up the flap.
3. Lightly pull the bracelet on the 6 o' clock side of the watch along the curved line of the
bracelet to pull out the slider. When doing so, take care not to pull the bracelet forcibly.
The slider can be pulled out approximately 30 mm. Be careful not to pull it out beyond the
limit mark inscribed on it.
4. While pressing the lock button indicated by the arrow （4） , lift up the clasp to release the
buckle, and put on the watch on your wrist.
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5. Close the clasp first and then, the flap.
6. Hold the bracelet on both the 6 and 12 o' clock sides of the watch with fingers to reduce the
length of the slider until it fits well around your wrist.
Lock button
①
Clasp Bracelet on the
12 o'clock side
②
of your watch
Flap
③
Bracelet on the
6 o'clock side
of your watch
■TO PRESERVE THE QUALITY OF YOUR WATCH
CAUTION
Daily care
・After using the watch in seawater, for instance, after diving, rinse it in fresh
water and wipe thoroughly dry. Do not use chemicals to wash the watch.
・Clean the rotating bezel regularly. If dust gathers under the bezel, the rotation
of the bezel will become difficult.
・Clean the soiled part of the metal band using a soft toothbrush dipped in soapy
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water.
PLACES TO KEEP YOUR WATCH
・If the watch is left in a temperature below −10℃ or above ＋60℃ for a long
time it may function improperly or stop operating.
・Do not leave the watch in a place where it is subjected to strong magnetism or
static electricity.
・Do not leave the watch where there is strong vibration.
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・Do not leave the watch in a dusty place.
・Do not expose the watch to gases or chemicals.
(Ex.: Organic solvents such as benzine and thinner, gasoline, nail polish,
cosmetic spray, detergent, adhesives, mercury, and iodine antiseptic
solution.)
・Do not leave the watch in a hot spring, or do not keep it in a drawer having
insecticides inside.

■TROUBLE SHOOTING

Trouble
The watch stops operating.
Even though you wear the watch every day,
the power reserve indicator does not move up.
The watch temporarily gains or loses time
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The inner surface of the glass is clouded.
The watch stops even though the power
reserve indicator is not showing "0" .
Right after starting the watch, it seems that the second
hand moves quicker than usual when setting the time.
The date changes at 12 o ' clock noon.
Limit mark
⑤
on the slider
Flap
Slider
Clasp
⑥
⑥
④
Lock button
Possible cause
The power supplied by the mainspring has been
consumed.
The watch is worn on your wrist only for a short period of
time, or the amount of arm movement is small.
The watch has been left or worn in extremely high or low
temperatures.
The watch is left close to an object with a strong magnetic
field.
You drop the watch, hit it against a hard surface, or wear it while
playing active sports. The watch is exposed to strong vibrations.
Moisture has entered the watch because the gasket has deteriorated.
The watch has been left under a temperature below 0℃.
When starting the watch, it takes a little time before the
adjustment function starts working （this is not a malfunction） .
AM/PM is not properly set.
■LUMIBRITE
（IF YOUR WATCH HAS LUMIBRITE）
LumiBrite is a luminous paint is completely harmless to that human beings and natural
environment, containing no noxious materials such as radioactive substance.
LumiBrite is a newly-developed luminous paint that absorbs the light energy of the
sunlight and lighting apparatus 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 5 to 8 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 the watch.
When you make a dive in the dark water, LumiBrite may not emit light unless it absorbs
and stores light sufficiently.
Before diving , therefore, be sure to expose the watch to light under the condition
specified above so that it fully absorbs and stores light energy. Otherwise, use the watch
together with an underwater flashlight.
＜Reference data on the luminance＞
y Sunlight
〔Fine weather〕 ：100,000 lux
z Indoor（Window side during daytime）
〔Fine weather〕 ：more than 3,000 lux
〔Rainy weather〕 ：less than 1,000lux
{ Lighting apparatus （ 40-watt daylight fluorescent light）
〔Distance to the watch：1m〕 ：1,000 lux
〔Distance to the watch：3m〕 ：500 lux （ average room luminance）
〔Distance to the watch：4m〕 ：250 lux
CAUTION
RASH AND ALLERGY
・Adjust the bracelet and band so that there will be a little clearance between the
bracelet or band and your wrist to avoid accumulation of perspiration.
・If you are constitutionally predisposed to rash, the band may cause you to
debelop a rash or an itch depending on your physical condition.
・The possible cause of the rash are as follows:
1. Allegy to metals or leathers
2. Rust, dust or perspiration on the watch or band
・If you develop any skin reactions, take off the watch and consult a doctor
immediately.
PRECAUTIONS ON WEARING YOUR WATCH
・In case you tumble and fall or bump into others with the watch worn on your
wrist, you may be injured by the reason of the fact that you wear the watch.
・When you make contact with children, especially with infants, they may get
injured or debelop arush caused by allergy.
・Do not drop the watch or hit it against a hard surface and not wear the watch
while playing active sprots. the watch may gains/loses time.
PERIODIC CHECK
・Checking and overhaul of the watch (cal. 5R66) will be performed by SEIKO.
When you take the watch to the retailer from whom it was purchased, request
that the watch will be checked and overhauled by SEIKO.
・We suggest that you have your watch checked by SEIKO every 3 or 4 years
for oil condition or damage due to water or sweat. After checking the watch,
adjustment and repair may be required.
・When replacing the parts, please specify " SEIKO GENUINE PARTS."
・Be sure to have the gasket and push-pin replaced with new ones when
checking the watch.
※Depending on the environment where a diver' s watch is used, its inner parts or
movement as well as its case or band may be affected. We recommend that you have
your watch overhauled regularly at every period indicated above.
Solution
Refer to "■HOW TO USE （HOW TO WIND THE MAINSPRING） " to wind the mainspring and reset the time. While you are wearing
the watch or when you take it off, check the remaining power shown by the power reserve indicator and wind the mainspring if necessary.
Wear the watch for an extended period of time, or when taking off the watch, turn the crown to wind the
mainspring if the remaining power shown by the power reserve indicator is not sufficient for the next use.
Return the watch to a normal temperature so that it works accurately as usual, and then reset the time. The watch has been
adjusted so that it works accurately when it is worn on your wrist under a normal temperature range between 5℃ and 35℃.
Prevent the watch from making close contact with magnetic objects so that the watch works accurately as usual, and then reset the
time. If the watch does not work accurately again after the above procedure, contact the retailer from whom the watch was purchased.
Reset the time. If the watch does not work accurately as usual after resetting the time, contact the
retailer from whom the watch was purchased.
Contact the retailer from whom the watch was purchased.
If the watch is left under a temperature below 0℃, it may stop if the power reserve indicator is
showing less than one-sixth. In such a case, turn the crown to wind the mainspring.
It takes several seconds before the adjustment function starts working. Set the time after the
second hand moves for approximately 30 seconds to set the time correctly.
Advance the hands for 12 hours to reset the time and date.
※Contact the retailer from whom the watch was purchased for any other troubles.
〔Cloudy weather〕 ：10,000 lux
〔Cloudy weather〕 ：1,000 to 3,000 lux
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