Seiko 6N76A Guide de démarrage rapide

PARTS CATALOGUE /TECHNICAL GUIDE

Cal. 6N76A

[SPECIFICATIONS]

Cal. No.

Item

Interval of hands movement

Driving system

Additional function

Loss/gain

Regulation system

Gate time for rate measurement

Power

supply

Battery No.

Battery voltage

Battery life

Number of jewels

1/18

Crown

operation

Normal position

1st click position

2nd click position

Current consumption

Coil resistance

1 second

0 jewel

Stepping motor, 1 piece

 

 

 

4004274 (CIRCUIT BLOCK WITH COIL BLOCK)

2.1 - 2.3 KΩ

Use 10-second gate.



Nil

1.55 V

Approx. 3 years

6N76A

 

small second hand)

 

Free

Date setting(clockwise)

Time setting, hand position adjustment / resetting the circuit

Monthly rate: Less than 20 seconds (worn on the wrist at the tempera-

ture between 5 and 35)

 

   

  

Movement: Less than 0.83 μA

Circuit block: Less than 0.27 μA

SPECIFICATIONS

2/18

Cal. 6N76A



Date calendar. The date frame has been enlarged compared to those from existing calibers, increasing the

legibility and practicality.



●The units digits and the tens digits are displayed in two separate indicator windows.

●Compared to date frame of the existing calibers, it is enlarged by about twice the original.

Cal. 6N76A

Basic calibers 

FEATURES

PARTS LIST Cal. 6N76A

3/18

For parts ❹and ❾

For parts ❺, please refer to page 12.

For parts ❽, please refer to page 7 and 8.

Disassembling procedures Figs. : ①㉞

Reassembling procedures Figs. : ㉞ ①

AO-2

Types of oil

Oil quantity NORMAL QUANTITY

AO-3

①

HANDS

②DIAL

③

INDICATOR

 

❹

INDICATOR

0878***

❺

 

⑥

0595181

⑦



0817181 ❽

0808181

❾

0878***

⑩



 

⑪

0810890

⑫

0273034

⑬

0802175

❺can

be dissassembled and

reassembled only at notch on

the ﬁrst date indicator. Please

refer to page 12.

Cal. 6N76A

PARTS LIST

4/18

Picture after ⓱BAT TERY

CONNECTION (+) is installed.

*1 Oiling position *2 Oiling position

For parts ⓮, please refer to page 8.

For parts ⓱and ⓲, please refer to page 9.

For parts , ⓴and 󱣆, please refer to page 10.

For parts 󱣇, please refer to page 11.

⓮ BAT TERY

⑮WINDING STEM 0351001

⑯BATTERY CONNECTION (+) SCREW

0016121

⓱ BATTERY CONNECTION (+)

4268066

⓲INSULATOR

4216088

⑲ BATTERY CONNECTION (-)

4270385

⓴TRAIN WHEEL BRIDGE

0125297

㉑CIRCUIT BLOCK WITH COIL BLOCK

4004274

㉒FOURTH WHEEL AND PINION

0144151

㉓THIRD WHEEL AND PINION

0231056

㉔ FIFTH WHEEL AND PINION

0701170 ㉕RESET PIN

0033219

㉖STEP ROTOR

4146126

㉗ROTOR STATOR

4239062

㉘FIRST INTERMEDIATE WHEEL

FOR CALENDAR

0962175

󱣆TRAIN WHEEL SETTING LEVER

0391041

󱣇PIN FOR SETTING WHEEL

0033220

㉜MINUTE WHEEL AND PINION

0261291

㉝CLUTCH WHEEL

0282087

㉛SETTING WHEEL

0281041

㉞CENTER WHEEL AND PINION

0221074

PARTS LIST Cal. 6N76A

5/18

●Tools and consumables required for disassembling/reassembling

• MOVEMENT HOLDER

 

• Watch oils

 

AO-3

AO-2

TECHNICAL GUIDE Cal. 6N76A

6/18

●How to ﬁnd the correct parts, if not determined by 4 digit caliber number





⑨      

④     

Parts Code

Position of Date Frame ⑨ ④

 0878123 0878127

12H 0878125 0878178

Please refer to the following table in order to ﬁnd the correct part number of each date indicator

according to the position of date frame.

TECHNICAL GUIDE Cal. 6N76A

7/18



(refer to the picture on the right) in order to



pull out the crown with the stem completely.

REMaRKs oN DisassEMBliNG aND REassEMBliNG thE MoVEMENt

●How to remove the SETTING STEM before dismantling the movement

Crown position: normal (=0) position. A

●How to remove the DATE DIAL GUARD

1) Lightly lift the A portion of the date dial

       

guide pin, and then move it in the clockwise

direction until it gets off the guide pin.

2) Release the B portion of the date dial guard

in the same way as described above, and

then move it in the clockwise direction until

it gets off the guide pin.

3) Check that all three protrusions of the date

dial guard have come off from the main

plate, and then remove the date dial guard.

The date dial guard has three protrusions to be caught under the main plate, and it is also ﬁxed by

two guide pins.

⑧

Protrusion B portion

A portion



Date dial guard

Guide pin

TECHNICAL GUIDE Cal. 6N76A

8/18

●How to install the DATE DIAL GUARD

1) Put the date dial guard on the main plate so

that the A and B portions are over the guide

pins, as shown in the illustrations at right.

2) Move the protrusion D of the date dial

guard in the counterclockwise direction so

that it is caught under the main plate.

3) Slightly move the protrusions C and E in

the counterclockwise direction alternately

to set them under the main plate. Then, set

the A and B portions of the date dial guard

to the guide pins.

4) Check that the date dial guard is fixed

securely to the main plate.

⑧DATE DIAL GUARD

Protrusion D

B PortionProtrusion C

Protrusion E A Portion

●How to install the BATTERY

Insert the battery aslant in the direction shown by the arrow. Check that the battery connection (+)

securely touches the side face of the battery.

Coil block

Main plate

⑰BATTERY CONNECTION (+)

Make sure the side of the battery touches

the Battery Connection (+)

Battery Connection (+)

Battery

Side view

TECHNICAL GUIDE Cal. 6N76A

9/18

●Remarks for installing the BATTERY CONNECTION (+)

Set it so that the hook portions (3 places) catch the main plate (Fig.1&2).

In disassembling and reassembling, take care not to deform the hook portions.



plate.

[Fig.1]

[Fig.2]

Hook portion

Main plate

Hook portion



●Remarks for setting position of the INSULATOR



should be set securely with the three pins as bellow.

⑱INSULATOR

TECHNICAL GUIDE Cal. 6N76A

10/18

●Remarks for setting position of the TRAIN WHEEL BRIDGE

Notes: Since the ﬁfth wheel and pinion and step rotor are made of plastic, take care not to damage

them in disassembling and reassembling.

Third wheel and pinion Minute wheel and pinion

Setting wheel

Clutch wheel

Fourth wheel and pinion

Fifth wheel and pinion

Step rotor

Clutch wheel

Fourth wheel and pinion

Fifth wheel and pinion

Step rotor

Pin for setting wheel

Setting wheel

Third wheel and pinion

Minute wheel and pinion

Reset pin

Center wheel and pinion

●Remarks for setting position of the TRAIN WHEEL SETTING LEVER

Notes:

 

 

㉙

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