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Seiko H851 Manual

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●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. Furthermore, the digital display may go out due to liquid leaking.
• The power transmission gear of the movement of this watch constantly receives force. To ensure that
this mechanism works properly all the time, washing parts, changing oil, adjusting accuracy, checking
functions and replacing consumable parts on a regular basis are important. The first overhaul after the
purchase of your watch is particularly important for preserving long-time use of your watch. 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.
bCAUTION
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 once every 3 or 4 years.
EN 56
6
TO PRESERVE THE QUALITY OF YOUR
WATCH
●Internal watch light (LED)
The watch uses a technique to uniformly diffuse light from a light emitting diode (LED) with a light guide
plate.
* If the battery is nearing the end of life and voltage decreases, illumination (brightness) will decrease.
●Liquid crystal panel
After the liquid crystal panel in this watch has been used for seven years, the contrast will decrease and
the numbers will be hard to read. Please get it replaced at the retailer from whom the watch was purchased.
They will replace it for a fee.
EN 57
6
TO PRESERVE THE QUALITY OF YOUR
WATCH
Troubleshooting
Troubles Possible causes Solutions Referen
ce
The watch stops
operating. The power is completely depleted or
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.
Sufficiently charge the battery until
the seconds hand moves every
second.
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. 37
The seconds hand
is moving at two-
second intervals.
Even if the watch
is charged until
“BATT 10” after it
stops, the
seconds hand
does not move in
one-second
intervals.
Or it does not
work.
The internal watch system is
unstable.
See “How to reset the system”
→ (P. 61) and follow the procedure. P. 61
EN 58
7
TROUBLESHOOTING
Troubles Possible causes Solutions Referen
ce
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.
-
The buttons do
not work
(Nothing happens
when they are
pressed)
The power is low.
Sufficiently charge the battery until
the seconds hand moves every
second.
P. 37
EN 59
7
TROUBLESHOOTING
… 16


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