Seiko 7T11A Technical Manual

Cal.

7T11A

[SPECIFICATIONS]

1/18

Movement

Item

Cal. No.

7T1

1A

0 jewel

Stepping motor, 3 pieces

• Battery life indicator (The sm

all second hand moves at two-second

intervals.)

• Second hand stop function

• Electronic circuit reset function

Monthly rate: Less than 15 seconds (worn on

the wrist at

temperature range

between 5 ºC and 35 ºC)

Use 10-second gate.

SEIKO SR927SW

Nil

1.55 V

Approx. 5 years

• STOPWATCH functions

Measur

e up to 12 hours in one second increments

Accumulated Elapsed Time Measurement

Split Time Measurement
STOPWATCH hand position adjust

ment

1 second

4002700, 2 pieces : 2.10 – 2.70 KΩ

1

. Coil block for

hour, minute, and small second

2. Coil block for stopwatch second

4002711, 1 piece: 1.80 –

2.40 KΩ

1

. Coil block for stopwatch mi

nute

Circuit blo

ck: Less than 0.20 µA

Movement : Less than 1.10 µA

Time setting, hand position adjust

ment / resetting the circuit

Free

Outside: Ø 27.6 mm Casing :Ø 27.0 mm

• Diameter

• Height: 3.3 mm

• 3 hands (h

our, minute,

and small second hands)

•

2

4 hour indicator

Battery No.

Driving system

Addit

ional function

Crown operation

Loss/Gain

Regulat

ion system

Gate

time for rate measurement

Current consumpt

ion

Po

wer supply

Battery life

Number of jewels

Interval of hands movements

Normal position

1st click position

Coil resistance

Battery voltage

SPECIFICATIONS

2/18

Cal. 7T11A has a new structure employing one crown and two buttons, but the basic movement
structure of Cal. 7T1

1A is similar to the previous Cal. 7T Series watches, and the knowledge and

tech

nique you have gained in handling the previous Cal. 7T Series watches will come in handy

when you repair Cal. 7T1

1A.

When repairing, however, you are requested to have full knowled

ge of the features characteristic

of t

hese watches and strictly observe the repairing and checking instructions provided in this

guide so that the watches wi

ll be repaired correctly.

FEATURES

Cal. 7T11A

●

Mea

surement performance

Displays the elapsed time with the 3 designated STOPWATCH hands.

Measures up to 12 hours in one second in

crements.

●

Button operat

ion (Crown position: Normal position)
Button A: START/STOP
Button B: SPLIT/SPLIT RELEASE/RESET

1. STOPWATCH FUNCTION

Button B

Button

A

Crown

Stopwatch second hand

Minute hand

Stopwatch hour and minute hands

Hour hand

Small second hand

24-hour hand

Click position (Time setting

and adjusting the stopwatch

Normal position

hand position)

Cal. 7T11A

This is the multi-display analogue watch featuring a stopwatch function.

The time is indicated by the 24-hour, hour and minute hands, and a small second hand.

The stop watch can measure up to 12 hours.

After 12 hours, it will stop automatically.

SPECIFICATIONS

/18

●

Mea

surement functions

Accumulated elapsed time measurement and split time measurement are available.

Cal. 7T11A

● Standard measurement

Button A

START

→

Button A

STOP

→

Button B

RESET

● Split (intermediate) time measurement

Button A

START

→

Button B

SPLIT

Button B

SPLIT RELEASE

→ → →

Button B

RESET

Button A

STOP

● Accumulated elapsed time measurement

Button A

START

→

Button A

STOP

Button A

STOP

→

Button B

RESET

→

Button A

RESTART

… →

Measurement and release of the split time can be repeated by pr essing button B

.

Restart and stop of the stopwatch can be repeated by pressing b

utton

A

.

● Measurement of two competitors

Button A

START

Button B

RESET

Button B

FINISH TIME OF FIRST

RUNNER

Button A

SECOND RUNNER

FINISH

→ →

Button B

FINISH TIME OF

SECOND RUNNER

→ →

After installing the bat tery, pull out the crown to the second click position. And then follow the
instructions below to correct the hand positions and set

the time.

NECESSARY PROCEDURE AFTER BATTERY CHANGE

Pull out to the click position when the small second hand is at the
60 seconds position. The small second hand stops on the spot.

Turn to set the main time.

* Check that AM/PM is correctly set.

Crown

Crown

Note*

Push back in to the normal position in accordance with a time signal.

Crown

Note*

Pressing Button A for longer than 2 seconds here will allow you to resume the procedure again

Button A

Press Button A for longer than 2 seconds to ready for “0” position adjustment.

Button A

Press Button A for longer than 2 seconds.
The STOPWATCH second hand turns a full circle.

Button A

Press Button A for longer than 2 seconds.

The STOPWATCH hour and minute hand turns a full circle.

Button B

Press Button B to set the STOPWATCH second hand to

the “0”

position.

Button B

Press Button B repeatedly to reset the STOPWATCH

second hand to the “0”

if button B is kept pressed.

position. (12:00) It moves quickly

3

Cal. 7T11A

→

→

Disassembling procedures Figs.:

Reassembling procedures Figs.:

Remarks on removing the Setting stem

To remove the SETTING STEM when taking out
the movement from the case or while disassemb

-ling the parts during repair work, be sure to pull
out the crown to the first click, and then, remove
the SETTING STEM while pushing the setting
lever

. Refer to page 9 for further details.

0027 973

4283 501

1002 501

0817 503

0271 583

0271 588

[24 HOUR INDICATOR
MECHANISM]

1

PIN FOR 24HOUR WHEEL
PLATE

2

24 HOUR WHEEL PLATE

3

24 HOUR WHEEL

4

5

6

INTERMEDIATE WHEEL
FOR 24H WHEEL

HOUR WHEEL

HOUR COUNTING WHEEL

Lubricating of some parts is shown in “REMARKS ON DISASSEMBLING AND REASSEMBLING.”

4/18

Cal. 7T11A

0022 230

4225 530

0022 459

4457 814

0396 580

4000 564

4270 710

0125 577

0888 582

0241 583

0261 580

0950 590

0270 582

0261 582

0027 974

0240 580

0231 580

0701 580

0885 594

0885 595

0022 230

0022 459

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

BA

TTERY CLAMP SCREW

BATTERY CLAMP

BATTERY (SR927SW)

CIRCUIT BLOCK COVER SCREW

CIRCUIT BLOCK COVER

FRICTIOIN SPRING FOR
SECONDS COUNTING

CIRCUIT

BLOCK

BATTERY CONNECTION (-)

TRAIN WHEEL BRIDGE

SECONDS COUNTING WHEEL

FOUR

TH WHEEL

MINUTE WHEEL

MINUTE COUNTING
INTERMEDIA

TE WHEEL

MINUTE COUNTING WHEEL

HOUR COUNTING
INTERMEDIA

TE WHEEL

PIN FOR TRAIN WHEEL BRIDGE

SMALL SECONDS WHEEL

THIRD WHEEL

FIFTH WHEEL

SECONDS COUNTING
1ST

INTERMIDIATE WHEEL

SECONDS COUNTING
2ND INTERMIDIA

TE WHEEL

Lubricating of some parts is shown in “REMARKS ON DISASSEMBLING AND REASSEMBLING.”

BATTERY CLAMP SCREW

CIRCUIT BLOCK COVER
SCREW

[GEAR TRAIN MECHANISM]

5/18

Cal. 7T11A

4002 711

4002 700

4002 700

4146 710

4146 710

4450 703

0383 592

0384 582

0281 580

0351 583

4283 581

0221 583

0391 591

4146 710

0282 586

4239 710

4239 711

4239 712

4450 701

0100 588

28

29

COIL BLOCK

COIL BLOCK FOR
MINUTE COUNTING

COIL

BLOCK FOR

SECONDS COUNTING

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

ROT

OR FOR

MINUTE COUNTING

ROT

OR FOR

SECONDS COUNTING

SWITCH LEVER FOR ST

ART/

STOP BUTTON

SETTING LEVER

YOKE

SETTING WHEEL

SETTING STEM

ROT

OR

CLUTCH WHEEL

SP

ACER FOR CENTER WHEEL

CENTER WHEEL

TRAIN WHEEL

SETTING

LEVER

ROT

OR STATOR

ROTOR STATOR FOR
SECONDS COUNTING

ROT

OR STATOR FOR

MINUTE COUNTING

SWITCH LEVER FOR
RESET

BUTTON

MAIN PLATE

Lubricating of some parts is shown in “REMARKS ON DISASSEMBLING AND REASSEMBLING.”

[SETTING MECHANISM/STEPPING MOTORS
(STATORS AND COIL BLOCKS)]

6/18