Seiko 7T11A Quick start guide

Cal. 7T11A
[SPECIFICATIONS]
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Movement
Item Cal. No. 7T11A
0 jewel
Stepping motor, 3 pieces
•Battery life indicator (The small 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
Measure up to 12 hours in one second increments
Accumulated Elapsed Time Measurement
Split Time Measurement
STOPWATCH hand position adjustment
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 minute
Circuit block: Less than 0.20 µA
Movement: Less than 1.10 µA
Time setting, hand position adjustment / resetting the circuit
Free
Outside: Ø 27.6 mm Casing:Ø 27.0 mm
• Diameter
• Height: 3.3 mm
• 3 hands (hour, minute,
and small second hands)
•24 hour indicator
Battery No.
Driving system
Additional function
Crown operation
Loss/Gain
Regulation system
Gate time for rate measurement
Current consumption
Power supply
Battery life
Number of jewels
Interval of hands movements
Normal position
1st click position
Coil resistance
Battery voltage

SPECIFICATIONS
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Cal. 7T11A has a new structure employing one crown and two buttons, but the basic movement
structure of Cal. 7T11A is similar to the previous Cal. 7T Series watches, and the knowledge and
technique you have gained in handling the previous Cal. 7T Series watches will come in handy
when you repair Cal. 7T11A.
When repairing, however, you are requested to have full knowledge of the features characteristic
of these watches and strictly observe the repairing and checking instructions provided in this
guide so that the watches will be repaired correctly.
FEATURES
Cal. 7T11A
●Measurement performance
Displays the elapsed time with the 3 designated STOPWATCH hands.
Measures up to 12 hours in one second increments.
●Button operation (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
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●Measurement 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 battery, 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]
1PIN FOR 24HOUR WHEEL
PLATE
224 HOUR WHEEL PLATE
324 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
BATTERY 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
FOURTH WHEEL
MINUTE WHEEL
MINUTE COUNTING
INTERMEDIATE WHEEL
MINUTE COUNTING WHEEL
HOUR COUNTING
INTERMEDIATE WHEEL
PIN FOR TRAIN WHEEL BRIDGE
SMALL SECONDS WHEEL
THIRD WHEEL
FIFTH WHEEL
SECONDS COUNTING
1ST INTERMIDIATE WHEEL
SECONDS COUNTING
2ND INTERMIDIATE 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
ROTOR FOR
MINUTE COUNTING
ROTOR FOR
SECONDS COUNTING SWITCH LEVER FOR START/
STOP BUTTON
SETTING LEVER
YOKE
SETTING WHEEL
SETTING STEM
ROTOR
CLUTCH WHEEL
SPACER FOR CENTER WHEEL
CENTER WHEEL
TRAIN WHEEL SETTING
LEVER
ROTOR STATOR
ROTOR STATOR FOR
SECONDS COUNTING
ROTOR 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)]
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Cal. 7T11A
7/18
●How to find the correct parts, if not determined by 4 digit caliber number
Following parts are determined based on the design of watches, such as hands height, dial color,
and design of cases. Please refer to the SEIKO WATCH PARTS CATALOGUE in order to choose
corresponding parts.
* HOLDING RING FOR DIAL (0866788)
38
SETTING STEM (0351583)
●
How to discriminate resembled parts
Refer to the illustrations below to see the difference between those two types of pins.
1 PIN FOR 24HOUR WHEEL PLATE
0027973
18 PIN FOR TRAIN WHEEL BRIDGE
0027974
CAL. 7T62A
CAL. 7T11A, CAL.7T92A
CAL. 7T94A
No hole
Hole
Hole
CIRCUIT BLOCK
The circuit block (4000 564) for Cal.7T11A is also used for Cal.7T92A.
*The holes for discrimination are intended to discriminate
among the circuit blocks for Cal. 7T11A, 7T62A, 7T92A
and Cal.7T94.
*After Cal. 7T11A was launched, in order to commonize the
circuit block to Cal.7T92A, the shape of the circuit block was
changed. The old circuit block (4000 518) for Cal.7T92A is
usable only for Cal.7T92A. The new circuit block (4000 564)
is usable for both Cal.7T11A and Cal.7T92A.
13 (4000 564)

Cal. 7T11A
●Tools and consumables required for disassembling/reassembling
•Movement holder
UNIVERSAL MOVEMENT HOLDER
(S-682)
• Watch oils
SEIKO watch grease (S-6) and watch oils (AO-3 and AO-2)
S-6 AO-2
AO-3
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TECHNICAL GUIDE Cal. 7T11A
REMARKS ON DISASSEMBLING AND REASSEMBLING
THE MOVEMENT
●How to remove the SETTING STEM before dismantling the movement
●Setting mechanism
•Setting position and lubricating
34 SWITCH LEVER FOR START/STOP BUTTON
35 SETTING LEVER
36 YOKE
42 TRAIN WHEEL SETTING LEVER
TRAIN WHEEL SETTING LEVER
YOKE
SETTING LEVER
SWITCH LEVER FOR START/STOP BUTTON
AO-3
SEIKO Watch Oil S-6
38 SETTING STEM
Crown position:
Click position
Push the SETTING LEVER gently (refer to the picture on the
right) in order to disengage it from the SETTING STEM. Then
pull out the crown with the stem completely.
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Cal. 7T11A
TECHNICAL GUIDE
15 TRAIN WHEEL BRIDGE and 18 PIN FOR TRAIN WHEEL BRIDGE
●Gear train mechanism
After setting the as illustrated
below, lubricate the upper pivots of the following parts:
•32 ROTOR, 33 ROTOR FOR SECONDS COUNTING,
COUNTING (as illustrated below)
•24 MINUTE WHEEL, 16 SECONDS COUNTING WHEEL
Upper pivot of the ROTOR
Upper pivot of the MINUTE WHEEL Other portions
WHEEL (as illustrated below)
31 ROTOR FOR MINUTE
and 19 SMALL SECONDS
16 SECONDS COUNTING WHEEL
41
CENTER WHEEL
10/18