Seiko 6N23A Manuale utente

PARTS LIST / TECHNICAL GUIDE

ANALOGUE QUARTZ Cal. 6N23A

6N23A

Driving system Step motor (Load compensated driving pulse system type)

Additional function

Normal position Free

1st click position Date setting (counter clockwise), Day settimg(clockwise)

2nd click position Time setting, hand position adjustment / resetting the circuit

Loss/Gain Monthly rate : Less than 15 seconds (at normal temperature range)

Regulation system Nil

Current consumption

Gate time for rate measurement

Coil resistance

Battery No.

Power supply Battery voltage 1.55V

Battery life Approximately 3 years

Jewels

0 jewels

1/13

SEIKO SB-AG　SR621SW (Silver oxide battery)

　　　　　　　　　　　　　　　Cal. No.

Item

・Electronic circuit reset switch

・Train wheel setting device

・Day and Date setting

・Battery life indicator

Crown

operation

・Movement: Less than 0.95 μA

・Circuit block: Less than 0.20 μA

Use 10-second gate

*Set the crown at the normal position

4004 317

2.15 - 2.35KΩ

Movement Size

・Outside diameter: φ 18.50 mm

3H - 9H : 16.10

12H - 6H : 18.20

Casing diameter : φ 18.10 mm

3H - 9H : －

12H - 6H : 17.80

・

Height : 3.05 mm

・

3 Hands (Hour, Minute, Second)

Lubricating : Types of oil Oil quantity

AO-3

AO-2

Hour, minute and second hands

Dial

0963 230

Snap for day star

with dial disk

Day star with dial disk

*Refer to the 6 page

for the parts code

0989 011

Intermediate wheel

for day corrector

0808 175

Date dial guard

0962 033

Date dial

　Second intermediate wheel *Refer to the 6 page

for calendar corrector

for the parts code

0802 031

0737 012

Date driving wheel Day-Date corrector wheel

0810 890

Date jumper

*Hour wheel

*Refer to the page 6

2/13

PARTS LIST

Cal. 6N23A

Disassembling procedures Figs.

①

→

㉝

Reassembling procedures Figs.

㉝

→

①

②

③

⑤

⑥

④

* Oiling position

⑨

⑧

⑩

⑫

⑪

⑦

Normal Quantity

Sufficieet Quantity

Lubricating : Types of oil Oil quantity

AO-3

AO-2

Battery

*Refer to the page 7

0351 332

Winding stem

⑮

0016 121

*Battery connection(+)

*Refer to the page 6

and 7

4216 088

Insulator

*Refer to the page 8

⑱

4270 385

Battery connection(-)

0125 407

Train wheel bridge

*Refer to the page 8

3/13

Screw for

Battery

connection (+)

⑯

* Oiling position

⑲

⑰

PARTS LIST

Cal. 6N23A

⑬

⑭

Normal Quantity

Sufficieet Quantity

Lubricating : Types of oil Oil quantity

AO-3

AO-2

4004 317

Circuit block with coil block

㉑*Fourth wheel and pinion

*Refer to the 6 page

㉓

0701 170

for the parts code

Fifth wheel

and pinion ㉒

0231 066

Third wheel and pinion

4146 126

Step rotor

0033 219

Reset pin

㉗

0806 142

Date corrector wheel

㉘

0391 041

4239 062

Train wheel setting lever

Rotor stator *Refer to the page 8

0281 041

㉙

0033 220

Setting wheel

Pin for setting wheel

*Refer to the page 9

Center wheel and pinion

㉛

0261 291

*Refer to the 6 page Minute wheel and pinion

for the parts code

0282 089

Clutch wheel

4/13

Cal. 6N23A

㉕

㉔

⑳

PARTS LIST

㉝

㉜

* Oiling position

㉖

㉚

Normal Quantity

Sufficieet Quantity

Cal. 6N23A

●Tools and consumables required for disassembling/reassembling

・Movement Holder

UNIVERSAL MOVEMENT HOLDER (S-682)

・Waich oils

SEIKO watch oil AO-2 and AO-3

AO-2 AO-3

5/13

PARTS LIST

Remarks：

□Date dial

□Day star with dial disk

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

Please refer to the following table in order to find the correct parts number.

　Standard type Long type

Special type

* All parts code are subject to change without notice.

6/13

Part code

Positing of

crown

Positing of

date frame

Color of figure

Color of

Background

0148 092

English /

Spanish

Parts name

㉝

0273 017

0273 054

0144 102

0144 144

⑯

4268 140

4268 141

⑪

Hour wheel

㉑

Fourth wheel and pinion

0878 172

Center wheel and　pinion

Positing of

crown

Positing of

date frame

Color of figure

Color of

Background

Battery connection(+)

Part code

0221 061

0221 068

English /

Spanish

Sun : Red

Cal. 6N23A

Black

TECHNICAL GUIDE

White

Language

Mon～Sat : Black

White

Black

0150 008

Mon～Sat : White

Black

0150 007

Sun : Red

Hands

How to install

Place the movement directly on an universal movement holder

to install the hands.

Battery

How to install battery

Insert the battery aslant in the direction shown by the arrow.

Check the battery connection (+) securely touches the

side of the battery.

Coil block

Correct

Battery connection (+) Battery Main plate

Battery connection (+)

How to install

Set the hook portions (3 places) with tweezers like (Fig.2), and make sure that the

hooks catch the main plate.

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

Tweezers

Hook portion

Main plate

Hook portion Hook portion

7/13

[ Fig. 1]

[ Fig. 2]

TECHNICAL GUIDE

Cal. 6N23A

①

⑬

⑯

Universal movement holder

REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT

Insulator

Setting position

Notes: In order to insulate the battery connection (+) and the battery connection (-),

the insulator should put at the three pins securely as below.

Insulator

Train wheel bridge

Setting position

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

damage them in disassembling and reassembling.

Minute wheel and pinion Fourth wheel and pinion

Pin for setting wheel

Fifth wheel and pinion

Setting wheel Step rotor

Setting wheel

Step rotor Clutch wheel

Third wheel and pinion Minute wheel and pinion

Reset pin

Clutch wheel

Fourth wheel and pinion

Fifth wheel and pinion

Center wheel and pinion

Train wheel setting lever

Setting position

Notes:

・Set the spring part of the train wheel setting lever to the pin as below.

・Take care not to deform the spring part.

Train wheel setting lever

8/13

㉘

TECHNICAL GUIDE

Cal. 6N23A

⑰

⑲

Third wheel and pinion

REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT

Cal. 6N23A

Pin for setting wheel

Notes:

・In disassembling and reassembling ，take care not to damage the pin, since it is

made of plastic and easily damaged.

・In disassembling，pick the pin up vertically from the main plate with care.

Pin for setting wheel

Center wheel and pinion

Minute wheel and pinion

・In reassembling，push the pin toward the main plate vertically with care.

Pin for setting wheel

Setting wheel

(fixed to Main late)

Center wheel and pinion

Minute wheel and pinion

9/13

㉙

TECHNICAL GUIDE

Tweezers

REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT

TECHNICAL GUIDE Cal. 6N23A

〔STRUCTURE OF THE CIRCUIT BLOCK〕

Notes:

Since the circuit block and coil block are an integrated structure, take care not to cut the coil wire.

while disassembling and reassembling

●Value checking -coil reistance (coil block)

Check the resistance of each coil block if they are within the range in the following table.

CIRCUIT BLOCK (WITH COIL BLOCK) 4004 317 2.15 - 2.35KΩ

10/13

C-MOS-IC

Input terminal(-)

Input terminal(+)

Crystal unit

Coil Block

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