Seiko 3M62A Installer manual

1
[SPECIFICATIONS]
Cal. No.
Item 3M62A
Movement
(x 1.0)
Additional mechanism • Automatic generating system
• Power reserve indicator
• Energy depletion forewarning function
• Overcharge prevention function
• Electronic circuit reset switch
• Train wheel setting device
• Date calendar
• Instant setting device for date calendar
Driving system Step motor (Load compensated driving pulse type)
Loss/gain Monthly rate at normal temperature range: less than 15 seconds
Regulation system Nil
Measuring gate by quartz tester Use 10-second gate.
Power
supply Automatic generating systemPower generator
PARTS CATALOGUE /TECHNICAL GUIDE
Cal. 3M62A
Movement
size Outside diameter ø24.0 mm
Casing diameter ø23.3 mm
Height 4.2 mm
Time indication 3 hands
Operating voltage range 0.45 V ~ 2.2 V
Duration of charge From full charge to stoppage: Approx. 2 months
Jewels 7 jewels
KINETIC E.S.U. Titanium lithium ion rechargeable battery

2
PARTS CATALOGUE
Disassembling procedures Figs. : 1 →50
Reassembling procedures Figs. : 50 →1
Lubricating: Types of oil Oil quantity
Moebius A Normal quantity
Moebius F
SEIKO Watch Oil S-6
➡Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
Cal. 3M62A
0012 354
• Rechargeable battery clamp screw
(2 pcs.)
• Circuit block cover B screw (2 pcs.)
• Circuit block cover A screw(3 pcs.)
• Oscillating weight bridge screw
(2 pcs.)
• Plus lead terminal screw (1 pc.)
• Setting lever spring screw (1 pc.)
0022 490
• Oscillating weight screw (1 pc.)
1 Hour, minute and
second hands
2 Dial
4 0012 766
Date dial guard screw
5 0808 550
Date dial guard
8 0802 622
Date driving wheel
6 Date dial
9 0271 555
Hour wheel
7 0810 550
Date jumper
3 0491 735
Dial washer
0012 766
• Date dial guard screw (3 pcs.)

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PARTS CATALOGUE Cal. 3M62A
➡Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
12 1002 550
Oscillating weight wheel
13 0012 354
Rechargeable battery clamp screw
16 0012 354
Circuit block cover B screw
15 4216 555
Insulator A for rechargeable battery
17 4457 870
Circuit block cover B
18 4216 556
Insulator B for rechargeable battery
19 3027 49Z
Rechargeable battery unit
20 0012 354
Circuit block cover A screw
21 4457 791
Circuit block cover A
14 4225 501
Rechargeable battery clamp
10 0022 490
Oscillating weight screw
11 0500 550
Oscillating weight
22 0012 354
Oscillating weight bridge screw
23 0198 550
Oscillating weight bridge
24 4000 733
Circuit block
25 1002 551
Intermediate wheel for generating rotor
26 4146 561
Generating rotor
27 4271 516
Rechargeable battery connection (+)

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PARTS CATALOGUE Cal. 3M62A
➡Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
28 0012 354
Plus lead terminal screw
30 0125 550
Train wheel bridge
31 0241 897
Fourth wheel and pinion
32 0701 550
Fifth wheel and pinion
33 0231 880
Third wheel and pinion
34 0261 880
Minute wheel
35 0281 890
Setting wheel
36 4146 560
Step rotor
37 0221 888
Center wheel and pinion
38 4002 560
Coil block
29 4242 550
Plus lead terminal
39 4002 561
Generating coil block
40 4239 561
Generating stator
41 4450 675
Switch lever
42 0012 354
Setting lever spring screw
44 0383 550
Setting lever
45 0384 550
Yoke
46 0391 550
Train wheel setting lever
47 4239 560
Rotor stator
49 0282 555
Clutch wheel
50 0100 550
Main plate
48 Winding stem
43 0388 550
Setting lever spring

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PARTS CATALOGUE Cal. 3M62A
Remarks:
6 Date dial
Part code
0878 699
Color of
background
Black3 o’clock
Position of
crown
3 o’clock
Position of
calendar frame Color of figure
Gold
The type of date dial is determined based on the design of cases.
Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding date
dial.
0878 696 White3 o’clock 3 o’clock Black
48 Winding stem 0351 550
The type of winding stem is determined based on the design of cases.
Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding
winding stem.
TECHNICAL GUIDE Cal. 3M62A
•The explanation here is only for the particular points of Cal. 3M62A.
•For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL
INSTRUCTIONS”.
I. STRUCTURE OF THE CIRCUIT BLOCK
Coil output terminal
Crystal unit
Input terminal (–)
C-MOS-IC
Input terminal (+)
Automatic generating
input terminal

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TECHNICAL GUIDE Cal. 3M62A
1 Hands
Place the movement directly on the riveting plate shown in the illustration with the oscillating weight
down, so that the oscillating weight screw is not damaged. Then, press in the hands.
10 Oscillating weight screw
Tighten the oscillating weight screw firmly,
applying more force than usual.
Oscillating weight screw
II. REMARKS ON DISASSEMBLING AND REASSEMBLING
For disassembling and reassembling, be sure to use the universal movement holder.
19 Rechargeable battery unit
Though they have a close resemblance in shape, the rechargeable battery unit for Cal. 3M6 Series is of
a completely different type from the capacitor unit for Cal. 3M2 Series. They can be discriminated in
the point that the former has a bend on its minus lead terminal while the latter doesn’t as illustrated
below. When repairing the rechargeable battery unit, check the bend on the minus lead terminal to
make sure you are properly using a rechargeable battery unit.
Bend
[ Rechargeable battery unit for Cal. 3M6 Series ] [ Capacitor unit for Cal. 3M2 Series ]
No bend

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TECHNICAL GUIDE Cal. 3M62A
•How to install
Set the guide hole of the minus lead terminal
to the post of the main plate, and push the “A”
portion down vertically so that the
rechargeable battery unit is well seated in
position.
Note: Take utmost care not to short-circuit the
(+)and(–)terminals,asthiswilldeteriorate
the battery unit.
“A” portion
Guide hole Minus lead terminal
Rechargeable battery
connection (+)
23 Oscillating weight bridge
•Lubricating
Lubricate the ball-bearing of the oscillating
weight bridge as shown in the illustration at
right.
24 Circuit block
The circuit block for Cal. 3M6 Series and that for Cal. 3M2 Series have a close resemblance in shape.
They can be discriminated in the point that the circuit block for Cal. 3M6 Series has no diode element
unlike that for Cal. 3M2 Series. When repairing the circuit block, check that it has no diode element to
make sure you are using the proper one.
Having no
diode element Diode
element
[ Circuit block for Cal. 3M6 Series ] [ Circuit block for Cal. 3M2 Series ]
Lubricating: : Moebius A

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TECHNICAL GUIDE Cal. 3M62A
Intermediate wheel for
generating rotor Generating
rotor
25 Intermediate wheel for generating rotor
26 Generating rotor
· Before tightening the oscillating weight bridge
screw, check that the upper pivot of the
generating rotor is inserted properly into the
pivot jewel.
· Lubricatethegeneratingrotorandintermediate
wheel for generating rotor as shown in the
illustration at right.
Note: Be sure to observe the position, type of oil
and quantity of the lubrication specified in
the illustration.
31 Fourth wheel and pinion
32 Fifth wheel and pinion
33 Third wheel and pinion
34 Minute wheel
35 Setting wheel
36 Step rotor
•Setting position and lubricating
Refer to the illustrations below for the setting position and lubrication of the respective wheels.
Fifth wheel
and pinion
Step rotor
Setting wheel
Fourth wheel and pinion
Minute wheel
Third wheel
and pinion Center wheel
and pinion
Step rotor Fifth wheel
and pinion Fourth wheel and pinion Third wheel and pinion
37 Center wheel and pinion
Lubricating: : Moebius A : Moebius F

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TECHNICAL GUIDE Cal. 3M62A
•Lubricating
Refer to the illustration at right.
Note: Be sure to observe the position, type of oil
and quantity of the lubrication specified
in the illustration.
Minute wheel Setting wheel
Lubricating: : Moebius A : SEIKO Watch Oil S-6
44 Setting lever
45 Yoke
46 Train wheel setting lever
•Setting position and lubricating
Refer to the illustration at right.
Train wheel setting lever
Setting lever
Yoke
Set the spring portion of the yoke
as shown.
III. VALUE CHECKING AND ADJUSTMENT
●Coil block resistance
2.4 KΩ~ 3.2 KΩ
●Generating coil block resistance
330 Ω~ 430 Ω

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TECHNICAL GUIDE Cal. 3M62A
●Current consumption
For the whole movement : Less than 0.60 µA (with 1.55 V supplied from a battery)
For the circuit block alone : Less than 0.20 µA (with 1.55 V supplied from a battery)
1. Make the movement ready for measurement.
How to measure the current consumption for the whole movement
1) Follow the disassembling procedure
illustrated in this manual until you remove
the rechargeable battery unit.
2) Install the rechargeable battery clamp and
then tighten the screws “A” and “B” in the
illustration at right.
3) Install the oscillating weight wheel and
oscillating weight and then tighten the
oscillating weight screw.
As a result, the insulators A and B for
rechargeable battery, circuit block cover B
screw, circuit block cover B and
rechargeable battery unit are removed
from the movement. Screw “A”
Screw “B”
Rechargeable
battery clamp
Circuit board
2. Apply the minus terminal to “a” portion of the
input terminal (–) in the illustration and plus
terminal to the rechargeable battery clamp,
respectively.
“a” portion of the input terminal (–)
Rechargeable battery clamp
Note: When moving the oscillating weight
from side to side, take care lest the
minus terminal of the tester touches the
oscillating weight.
3. For a few seconds after the probes of the tester
are applied to the movement, the IC is in the
quick start mode, and current consumption
cannotbe measured properly. To switch the IC
from the quick start to the normal hand
movement mode, move the oscillating weight
from side to side continuously for more than
three seconds with the tester connected to the
movement. The IC will detect the electricity
generation and will be switched to the normal
hand movement mode.
4. After checking that the IC has been switched to the normal hand movement mode and a stable
measurement can be obtained, read the measurement.
If the measurement value remains high or unstable, repeat step “3” above.

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TECHNICAL GUIDE Cal. 3M62A
Notes:
* Light may increase the current consumption, resulting in an inaccurate measurement. If the current
consumption exceeds the standard value, protect the movement from light with a black cloth or the
like, and make a measurement again.
* When the current consumption for the whole movement exceeds the standard value while the current
consumption for the circuit block alone is within the standard value range, a driving pulse may be
generated to compensate for the heavy load applied on the gear train, etc. In that case, overhaul and
clean the movement parts, and then, measure the current consumption for the whole movement again.
1. Connect the tester to the circuit block as shown in the illustration.
How to measure the current consumption for the circuit block alone
“A” portion
2. With the tester connected to the circuit block, short-circuit “A” portion in the illustration and the input
terminal(–) with conductive tweezers or the like for morethan 3 seconds. The IC will be switched from
the quick start to the normal hand movement mode.
3. Checking that a stable measurement is obtained, read the current consumption.
If the measurement value remains high or unstable, repeat step “2” above.
Note: The current consumption measurement for the circuit block alone is particularly susceptible to
light, and a value higher than the actual measurement may be obtained if the circuit block is
exposed to light. Protect the circuit from light with a black cloth or the like after following step “2”
above, and then, measure the current consumption.
●Checking the automatic generating system
1. Apply the probes of the tester as shown in the
illustration, and measure the voltage of the
rechargeable battery. The obtained voltage is
called the “initial voltage”.

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TECHNICAL GUIDE Cal. 3M62A
2. Close the case back tentatively, and swing the
watch from side to side 200 times at a rate of 2
to 3 swings a second, making an arc of
approximately 20 cm.
[ For your information ]
1. Number of swings and power reserve
· When the watch stops completely, swinging it approximately 400 times at a rate of 2 to 3 times a
second will start the second hand moving at normal one-second intervals instead of two-second
intervals, indicating that approximately one day of power has been reserved.
If the second hand still moves at two-second intervals after 400 swings, swing the watch further until
it moves at one-second intervals.
· While the second hand is moving at one-second intervals, 350 to 400 swings will reserve up to one
day of power.
2. Power reserve indication and duration of charge until the watch stops operating
· Cal. 3M62A is equipped with a power reserve indicator. The current power reserve can be checked
using the second hand at the press of the power reserve indicator button.
Note: Immediately after the watch is charged by swinging it from side to side, the indicator may show
power reserve larger than the actual one. In that case, leave the watch untouched for 10 to 15
minutes, and then, check the power reserve.
3. Within 3 minutes after swinging the watch, measure the voltage of the rechargeable battery in the
same manner as in step “1” above.
4. If the voltage obtained has increased more than 0.04 V from the initial voltage assuming that the initial
voltage is within the range between 0.5 V and 1.0 V, the automatic generating system is operating
normally.
Quick movement of the second hand when the
power reserve indicator function is activated Duration of charge
5 seconds
10 seconds
20 seconds
30 seconds
Between 1 and 7 days
Between 7 days and 1 month
Approx. 1 month
Between 1.5 and 2 months
* Printed on recycled paper. 99-12 Printed in Japan