Seiko 4F56A Guide de démarrage rapide

PARTS CATALOGUE /TECHNICAL GUIDE

Cal. 4F56A, 8F56A, 8F58A

[SPECIFICATIONS]

Cal. No.

Item 4F56A 8F58A

Movement

8F56A

(x 1.0)The illustrations refer to Cal. 8F56A.

Movement

size ø18.5 x 17.7 (3H - 9H) x

18.5 (12H - 6H) ø26.4 x 25.6 (3H - 9H) x 25.6 (12H - 6H)

17.1 (3H - 9H) 24.8 (3H - 9H) x 24.8 (12H - 6H)

Time indication 3 hands (hour, minute and second hands) + 24-hour hand

Outside diameter

Casing diameter

Height )

Including the

battery portion

(4.8 4.8

Driving system

Additional mechanism

Loss/gain Annual rate within normal temperature range: less than 20 seconds

Regulation system Logical regulation (Pattern cutting system: 3 steps)

Measuring gate by quartz tester Use 10-second gate.

CR1612

Battery Battery No. BR2412

Voltage 3.0 V

Battery life Approx. 5 years Approx. 8 yearsApprox. 10 years

Jewels 4 jewels

•Step motor (for 24-hour, hour, minute and second hands)

•Ultrasonic motor (for calendar indication)

•Calendar (Leap year indication, month and date)

Perpetual calendar up to February 28, 2100

•Independent adjustment of hour hand

• Train wheel setting device

•Electronic circuit reset switch

•Battery life indicator

Disassembling procedures Figs.: 1 ﬁ49

Reassembling procedures Figs.: 49 ‹1

Lubricating: Types of oil Oil quantity

Moebius A Normal quantity

Moebius V

Moebius F

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

2Dial

124-hour, Hour, Minute and

second hands

3Holding ring for dial

0884 167 (4F56A)

0884 166 (8F56A,8F58A)

Please see the remarks on the following pages.

Ex. : Cal. 8F56A

Cal. 4F56A, 8F56A & 8F58A

( + )

Please see the remarks on the following pages.

0016 704

• Circuit block cover screw (4 pcs.)

•Train wheel bridge screw (2 pcs.)

0016 705

•Ultrasonic motor screw (2 pcs.)

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

8Circuit block

4003 424 (4F56A)

4003 091 (8F56A,8F58A)

9Date driving

contact point spring

4281 115

10 24-hour contact point spring

4281 119

11 Battery connection (–)

4270 415

12 Insulator for battery (B)

4216 116

13 Coil block

4002 115

4Battery

6Circuit block cover screw

0016 704

7Circuit block cover

5Insulator for battery (A)

2Battery

5Insulator for battery (A)

A battery with 5 Insulator for

battery (A) (red) may be installed in

some models. Discard this type of

battery after replacing it with a new

batteryofthelatestmodel,towhich

the insulator for battery (white) is

attached.

Note Pull out the crown to the first click before starting disassembling or reassembling.

It is highly recommended that the exclusive

movement holder (S-680) be used for

disassembly or reassembly. Contact SEIKO

SERVICE CENTER to purchase this tool.

4Battery

For removing or installing the

batteryandinputtingcalendardata,

refer to page 11 to 16.

Ex. : Cal. 8F56A

Cal. 4F56A, 8F56A & 8F58A

( - )

Insulator for battery(B) (white)

15 24-hour clutch wheel

0273 113

14 Date dial guard 0808 127

17 Date dial

0012 354

Date jumper screw ( 4 pcs. )

16 Dial Washer

0491 016

18 Hour wheel

0273 114

19 Intermediate 24-hour driving

wheel and pinion

0817 117

20 Third intermediate wheel for

hour corrector

0168 014

21 Date jumper screw

0012 354

22 Date jumper

0810 116

23 Calender Plate

0195 014

24 Second intermediate wheel for

hour corrector

0168 013

25 Intermediate date driving wheel

and pinion

0817 118

26 Bush for second intermediate wheel

for hour corrector guide

4247 018

27 Ultrasonic rotor

4062 117

29 Date driving wheel

0802 116

28 24-hour wheel

1019 114

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

Please see the remarks on the following pages.

Ex. : Cal. 8F56A

Cal. 4F56A, 8F56A & 8F58A

Note Never remove the 24-hour

wheel and date driving wheel

while working on the date dial

replacement(without

disassembling the train wheel

side), as the date driving

contact point spring and 24-

hour contact point spring may

drop off.

49 Main plate

0100 148 (4F56A)

0100 138 (8F56A,8F58A)

30 Train wheel bridge screw

0016 704

31 Train wheel bridge

0125 254

32 Fourth wheel and pinion

33 Third wheel and pinion

0231 116

34 Fifth wheel and pinion

0701 116

35 Rotor

4146 116

36 Setting wheel

0281 115

37 Yoke guard

0388 116

38 Train wheel setting lever

0391 115

39 Stator

4239 115

40 Minute wheel and pinion

0261 048 (4F56,8F56A)

0261 049 (8F58A)

41 Setting lever

0383 115 (4F56A)

0383 116 (8F56A,8F58A)

43 Setting stem

44 Clutch wheel

0282 117

45 First intermediate wheel for hour

corrector

0168 011

47 Ultrasonic stator unit screw

0016 705

48 Ultrasonic stator unit

4234 115

42 Yoke

0384 116

46 Center wheel and pinion

Ex. : Cal. 8F56A

Cal. 4F56A, 8F56A & 8F58A

Please see the remarks on the following pages.

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

0221 122 0241 167 0273 114

24461 034

0221 122 0241 167 0273 114

4F56A

8F56A

4461 026

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

Circuit

block cover Center wheel and

pinion Fourth wheel and

pinion Hour wheel

Circuit

block cover Center wheel and

pinion Fourth wheel and

pinion Hour wheel

Remarks

●Back plate

For some models which use the back plate, refer

to the illustration at the right to mount it.

●Case ring

The type of case ring is determined based on the

case design.

Check the case number and refer to “SEIKO

CasingPartsCatalogue”tochoosetheappropriate

case ring.

7Circuit block cover

32 Fourth wheel and pinion

46 Center wheel and pinion

18 Hour wheel

•Discrimination of the hand installation height

Cal. 4F and 8F Series watches have numerals printed on

movement to indicate the hand installation height. When

repairing, refer to the table below.

Align the indicator to the

setting stem.

Numeral for discrimination

Numeral for

discrimination

Numeral for

discrimination

0221 124 0241 167 0273 114

8F58A

4461 035

Circuit

block cover Center wheel and

pinion Fourth wheel and

pinion Hour wheel

17 Date dial

Cal. No. Part code Position of crown and

calendar frame Color of figure Color of

background

4F56A

8F56A

8F58A

0878 320

0878 356

3 o'clock

Black

White

PARTS CATALOGUE Cal. 4F56A, 8F56A, 8F58A

The type of date dial is determined based on the case design.

* Not all the types of date dial are shown in the table above.

Checkthe casenumber andrefer to“SEIKO CasingParts Catalogue”to choosethe appropriatedate dial.

43 Setting stem 0351 196

The type of setting stem is determined based on the case design.

Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose the appropriate setting

stem.

Numeral for

discrimination

TECHNICAL GUIDE Cal. 4F56A, 8F56A, 8F58A

• The explanation here is only for the particular points of Cal. 4F56A, 8F56A and 8F58A.

• For repairing, checking or measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL

INSTRUCTIONS”.

I. STRUCTURE OF THE CIRCUIT BLOCK

[ Cal. 4F56A ]

[ Cal. 8F56A, 8F58A ]

“ø” terminal

(for resetting the date dial)

“M” terminal (for month setting) “Y” terminal (for year setting)

“D” terminal

(for date setting)

AC terminal

Coil block output terminal

Input terminal (+)

C-MOS-IC

Input terminal (–)

Crystal unit

“ø” terminal

(for resetting

the date dial)

“M” terminal (for month setting)

“D” terminal

(for date setting)

AC terminal

“Y” terminal

(for year setting)

Coil block output terminal

Input terminal (+)

C-MOS-IC

Input terminal (–)

Crystal unit

II. REMARKS ON DISASSEMBLING AND REASSEMBLING

TECHNICAL GUIDE Cal. 4F56A, 8F56A, 8F58A

It is highly recommended that the exclusive movement holder (S-680) be used to disassemble or

reassemble the watch.

Use of other movement holders may make unreliable the screw pins (the gold part) of the main plate.

Be careful not to press the main plate too hard when screwing or unscrewing the pins.

To prevent deformation of the main plate, never use the movement holder which is designed to hold

the movement with only two side guides.

◆How to use the exclusive movement holder

Setting stem guide

A portion

129 B portion

30 49

[ Cal. 8F Series]

Disassembling/reassembling procedures :

Setting stem guide

A portion

Disassembling/reassembling procedures : 129 B portion

30 49

[ Cal. 4F Series ]

Disassembling/reassembling procedures :

Hooking portion Battery

1 24-hour, hour, minute and second hands

Always set the hands with the battery installed.

Set the movement to the A portion of the exclusive movement holder.

If any other movement holder is used, be certain to place the movement on a secure, flat plate. Pay special

attention not to damage the hooking portion.

1. Set 4 Battery. (Refer to page 12.)

2. Set 3 Holding ring for dial.

3. Set 2 Dial.

4. Go to "Necessary procedure after a battery change".

*Refer to page 12 for details.

5. Input the calendar data.

*Refer to page 13 to 16 for details.

To set the hands more accurately,

1) Turn the crown clockwise until the date changes.

2) Give the crown four counterclockwise turns until the previous date appears.

3) Slowly turn the crown clockwise until the date changes again.

4) Set the hands to point at the 12 o’clock position.

Installation of the hands

Turn the crown clockwise until the date changes, then set the hands to point at the 12 o’clock position.

◆How to set the hands

TECHNICAL GUIDE Cal. 4F56A, 8F56A, 8F58A

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