Seiko 5D44A Installer manual

PARTS CATALOGUE/TECHNICALGUIDE
Cal. 5D44A
[SPECIFICATIONS]
Cal. No.
Item
Movement
Movement
size
Time indication
Outside diameter
Casing diameter
Height
Driving system
Additional functions
Loss/gain
Ø 28.0 mm
Ø 30.0 mm
6.25 mm
3 hands (Hour, Minute and Second hands)
Step motor 2 pieces
• Direct drive indicator
Power reserve indicator
Real-time power indicator
• Energy depletion forewarning function
• Overcharge prevention function
• Electronic circuit reset function
• Second hand stop function
• Date correction function
Monthly rate: less than 15 seconds
(worn on the wrist at temperature range between 5 to 35 ºC)
Use 10-second gate.
Nil
5D44A
Calendar (Date: date dial, Day: retrogdade day indicator)
Power
supply
Power generator
Operating voltage range
Maximum Continuous operating time
KINETIC E.S.U.
Regulation system
Measuring gate by quartz tester
Automatic generating system + Manual winding power generating system
MT920 Manganese titanium lithium rechargeable battery
1.05V - 2.50V
Approximately 1 month after the watch is fully charged
Number of jewels 12 jewels

BEFORE STARTING REPAIR WORK ON CAL. 5D44A
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SEIKO Kinetic Direct Drive Cal. 5D44 is an embodiment of the SEIKO’s ‘emotional technology’.
The watch features new functions but the knowledge of repairing the existing KINETIC series
will be helpful.
To repair the Cal. 5D44, therefore, you are requested to have the full knowledge of its functions
and strictly observe the repairing and checking instructions provided in this guide so that the
watch will be correctly repaired.
FEATURES
1. DISPLAY AND HOW TO USE
The Cal. 5D44 is a KINETIC watch equipped with two winding functions and two indicator
functions.
l Two winding functions
As in all existing Kinetic calibers, the wearer automatically generates the elctrical energy
by her/his wrist movement. With Kinetic Direct Drive, however, the wearer can also
generate energy by winding the crown.
lTwo indicator functions
Kinetic Direct Drive shows not only the power held in reserve but also the level of power
generation when the wearer hand-winds the crown. The wearer can see and feel, in real
time, the direct transfer of power from his or her winding of the crown to the reserve.
Button (10 h)
Direct drive indicator hand
Second hand
Hour hand Minute hand
Day hand (retrograde day indicator)
Crown

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Crown position Functions by crown operation Functions by button operation
Normal • Electric power generation
by manual winding
Clockwise turn:
charging the watch by
manual winding
Counterclockwise turn:
No function
First click • Calendar setting
Clockwise turn:
day setting
Counterclockwise turn:
date setting
Manual 0 position alignment of the direct drive
indicator hand
The watch automatically corrects the position of the
direct drive indicator hand once every 24 hours. While
correcting its position, the direct drive indicator hand
automatically moves, but it is not a malfunction.
How to manually correct the position of the direct
drive indicator hand
• The position of the direct drive indicator hand can
be also corrected by hand.
1.Pull out the crown to the first click.
2.Press the button located at the 10 o’clock position
for 2 seconds or more.
By doing this, the direct drive indicator hand returns
to the standby position.
3.Press the button at the 10 o’clock position to set the
position of the direct drive indicator hand pointing
exactly to the 0 position.
With each pressing of the button, the direct drive
indicator hand moves up the scale by one increment.
By pressing the button, adjustment can be made
upto the second increment. At the third pressing of
the button, the direct drive indicator hand returns to
the standby position. Repeat the procedures until the
direct drive indicator hand is correctly aligned to the 0
position.

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2. CHARACTERISTICS OF MANUAL WINDING FUNCTION OF KINETIC DIRECT DRIVE
1. As for mechanical watches, the amount of power generated increases in proportion to the
number of times the mainspring is wound. As for the KINETIC DIRECT DRIVE watches, however,
the amount of power generated by manual winding varies depending on the speed and length of
strokes in which you wind the crown.
The more efficiently the power is generated, the more the direct drive indicator hand moves.
It is even possible to reach the maximum scale value of power reserve with only one stroke.
2. The size of the crown will also affect the amount of power generated by manual winding.
Even if the crown is turned in exactly the same manner, the amount of power generated will vary
depending on the size or the shape of the crown.
Generally, the smaller the crown is, the more efficiently the watch can generate the power.
Crown position Functions by crown operation Functions by button operation
Second click • Time setting System reset (No power is generated.)
If any improper function occurs, for example, the
direct drive indicator hand stops moving while it is
pointing anywhere other than the standby position,
follow the instruction below to reset the built-in IC.
1.Pull out the crown to the second click.
2.Press the button at the 10 o’clock position for 2
seconds or more.
3. Push the crown back into the normal position.
After pushing the crown back into the normal position,
charge the watch by manual-winding method and
check that the hands start moving. At the same time
the hands start moving, the direct drive indicator hand
will return to point at the 0 position, and the watch will
resume its normal operation.
After the built-in IC is reset, the continuous operating
time is cleared and the direct indicator hand points at
the 0 position. If no power is generated subsequently,
the watch will stop operating within three minutes. In
order to avoid this, charge the watch at least until the
direct drive indicator hand points at the first indication
on the dial. It is also recommended that you correct
the position of direct drive indicator hand manually as
instructed on page 3.

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3. HOW THE DIRECT DRIVE INDICATOR HAND WORKS
1. Power reserve indicator function
• Except when the crown is being turned to charge the watch, the direct indicator hand functions
as a power reserve indicator which shows how long the watch will keep operating within the
range between the minimum 3 hours and the maximum 1 month.
For more details, refer to “ How to read the power reserve indicator” below.
• If the direct drive indicator hand indicates the 0 position, the watch will stop operating within 3
hours. When the watch stops, the direct drive indicator hand moves to the standby position to
show that the watch stops operating due to a power shortage.
• The direct drive indicator hand constantly displays the most up-to-date amount of stored
power. If the amount of stored power is increased by the wearer’s wrist movement or by the
manual crown windings, the direct drive indicator hand displays the increased amount of power
accordingly. On the other hand, if the watch is left unworn and the stored power is decreased
as the watch consumed some power during the time it is left unworn, the direct drive indicator
hand displays the decreased amount of stored power accordingly.
• The maximum amount of power reserve that the watch can store is the amount of power
reserve to keep the watch operating for one month. When more power is generated after the
watch already stores this maximum amount of power, the power generated is not further
accumulated, and the direct drive indicator hand shows the power reserve of one month.
Scale marking 012345678910
Indication on dial 0 D
Power reserve display 0 3h 6h 9h 12h 15h 18h 21h 1 day
Scale marking 11 12 13 14 15 16 17 18 19 20
Indication on dial W
M
Power reserve amount 2 days 3 days 4 days 5 days 6 days 1W 2W 3W
30days
*note 1
How to read the power reserve indicator
*note 1 Even though the continuous operating time reaches one month, the direct drive
indicator hand remains moving to show that the power generating function is
operating.
• The scale marking indicates the minimum continuous operating time.
Scale marking Power reserve
3 3 hours (Not shorter than 3 hours and not longer than 6 hours)
13 4 days (Not shorter than 4 days and not longer than 5 days)
17 2 weeks (Not shorther than 2 weeks and not longer than 3 weeks)
20 *note 1

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*note 1 When the watch is charged by any other method than manual winding, such as using KINETIC
ENERGY SUPPLIER, the direct drive indicator hand may move in slightly slower motion.
*note 2 The direct drive indicator hand will stop at the maximum scale value pointing at the ‘M+1’ position.
If the crown is turned after the direct drive indicator hand stops at the ‘M+1’ position, the watch
continues to accumulate power reserve, but the real-time power indicator function stops. If you
want to display the amount of generated power, stop turning the crown, and after the direct drive
indicator hand returns to the power reserve display, start turning the crown again.
When the electric power is generated without interruption, for example when an electric charger
is used, the direct drive indicator hand will stop and remain pointing at the ‘M+1’ position.
*note 3 After the direct drive indicator hand displays the accumulated amount of generated power, it
returns to the power reserve display.
(Caution)
To enjoy the real-time power indicator function, power generation by manual winding is
recommended as it enables you to check the power generating status.
2. Real-time power indicator function
How to read the real-time power indicator
Scale marking 0 1 2 3 4 5 6 7 8 9 10
Indication on dial 0 D
Amount of generated power
h=hour(s) min=minute(s)
Standby
position 020 min 40 min 1h 1h
20 min
1h
40 min 2h 2h 20 min
2h
40 min
Scale marking 11 12 13 14 15 16 17 18 19 20
Indication on dial W
M
Amount of generated power
h=hour(s) min=minute(s) 3h 3h
20 min
3h
40 min 4h 4h 20 min
4h
40 min 5h 5h 20 min
5h
40 min 6h
<Display and movement flow of the direct drive indicator hand while charging the watch>
Power reserve
display
Power generation status and generated power display
Power reserve display
Initial status In-progress
A. While turning the crown B. When temporarily
stopping turning the
crown
After
approximately 4
seconds since
stopping turning
the crown
After
approximately
1 second since
starting to turn
the crown
A B
✽The direct drive indicator hand points at
a scale marking between 0 and ”M+1”
according to power generation status.
✽The point where the indicator
hand starts moving goes up as
generated power increases.

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Case 1: The watch has been stopped temporarily.
The watch in this condition falls in the range shown by ‘1. The watch instantly starts moving’ in the
diagram below.
• The watch starts operating within a few seconds after you start turning the crown, and
automatically correct the position of the direct drive indicator hand to the 0 position (0
indication on the dial).
• After the direct drive indicator hand returns to the 0 position, if no further power is generated
subsequently, the watch will stop operating within three minutes.
• To prevent the watch from stopping during the subsequent procedures such as time setting
and date setting, charge the watch at least until the direct drive indicator hand points at the first
indication on the dial (3 hours of power reserve).
Case 2: The watch has been left unworn and stopped for a long time. (3 to 5 years or even more)
The watch in this condition falls in the range shown by ‘2. 2-second interval movement = The direct
drive indicator hand does not move’ in the diagram below.
When the voltage of the secondary battery is reduced to an extremely low level after the watch is
left unworn for a long time, the watch moves in 2-second intervals after you start turning the crown
until the voltage is increased to a reasonable level.
Charge the watch by manual winding method until the direct drive indicator hand returns to the 0
position from the standby position.
• If power generation is stopped while the watch is moving in 2-second intervals and before the
direct drive indicator hand returns to the 0 position, the watch will stop operating within one
minute.
• Estimated time required for manual winding to reactivate the watch in this condition:
approximately 5 to 6 minutes
4. HOW TO REACTIVATE THE WATCH AFTER IT STOPPED
Charge the stopped
watch manually by
turning the crown.
Th e watc h star t s op er at ing
normally within a few seconds.
The watch starts operating in
2-second intervals.
Case 1:
The watch has been stopped temporarily.
Case 2:
The watch has been left unworn for a
long time.
To reactivate the stopped watch, see the condition of the watch by following the steps below.
voltage and reactivation process diagram
amount of power reserve
a
a
a
a

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Set the crown to the 5J position.
• Make sure that the watch is correc tly
positioned as it may affect the amount of
power generated.
• The amount of power generated may vary
depending the models of the watch.
• In some cases, the direct drive indicator
hand does not move.
• If the direct drive indicator indicates a
fully-charged status, the KINETIC ENERGY
SUPPLIER will continue to charge the
watch.
5. HOW TO CHARGE THE WATCH WITH KINETIC ENERGY SUPPLIER YT-02A
5J