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[SPECIFICATIONS]
Item
• 3 hands (hour, minute,
and small second hands)
• 24 hour indicator
Interval of hands movements
Driving system
Additional function
Crown operation
Normal position
1st click position
Loss/Gain
Regulation system
Gate time for rate measurement
Current consumption
Coil resistance
Battery No.
Power supply
Battery voltage
Battery life
Number of jewels
Cal. 7T11A
Cal. No.
1 second
Stepping motor, 3 pieces
• STOPWATCH functions
Split Time Measurement
STOPWATCH hand position adjustment
• Battery life indicator (The small second hand moves at two-second
intervals.)
• Second hand stop function
• Electronic circuit reset function
Free
Time setting, hand position adjustment / resetting the circuit
Monthly rate: Less than 15 seconds (worn on the wrist at
temperature range between 5 ºC and 35 ºC)
Nil
Use 10-second gate.
Movement:
Circuit block:
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
SEIKO SR927SW
1.55 V
Approx. 5 years
0 jewel
Movement
• Diameter
Outside: Ø 27.6 mm
• Height:
Measure up to 12 hours in one second increments
Accumulated Elapsed Time Measurement
Less than 1. 10 µA
Less than 0.20 µA
1/18
7T11A
Casing:Ø 27.0 mm
3.3 mm
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Related Manuals for Seiko 7T11A
Summary of Contents for Seiko 7T11A
- Page 1 Cal. 7T11A [SPECIFICATIONS] Cal. No. 7T11A Item Movement • 3 hands (hour, minute, • Diameter and small second hands) Outside: Ø 27.6 mm Casing:Ø 27.0 mm • 24 hour indicator • Height: 3.3 mm Interval of hands movements 1 second...
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Page 2: Specifications
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. -
Page 3: Necessary Procedure After Battery Change
SPECIFICATIONS Cal. 7T11A ● Measurement functions Accumulated elapsed time measurement and split time measurement are available. ● Standard measurement Button Button Button → → START STOP RESET ● Accumulated elapsed time measurement Button Button Button Button Button → → … →... - Page 4 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...
- Page 5 Cal. 7T11A BATTERY CLAMP SCREW 0022 230 BATTERY CLAMP 4225 530 0022 230 BATTERY (SR927SW) BATTERY CLAMP SCREW CIRCUIT BLOCK COVER SCREW 0022 459 0022 459 CIRCUIT BLOCK COVER CIRCUIT BLOCK COVER SCREW 4457 814 [GEAR TRAIN MECHANISM] FRICTIOIN SPRING FOR...
- Page 6 Cal. 7T11A [SETTING MECHANISM/STEPPING MOTORS COIL BLOCK FOR (STATORS AND COIL BLOCKS)] MINUTE COUNTING 4002 711 29 COIL BLOCK 4002 700 COIL BLOCK FOR SECONDS COUNTING 4002 700 ROTOR FOR MINUTE COUNTING 4146 710 ROTOR 4146 710 ROTOR FOR SWITCH LEVER FOR START/...
- Page 7 ● 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.
- Page 8 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) AO-3 AO-2 8/18...
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Page 9: Technical Guide
● Setting mechanism Setting position and lubricating • SWITCH LEVER FOR START/STOP BUTTON SETTING LEVER YOKE TRAIN WHEEL SETTING LEVER TRAIN WHEEL SETTING LEVER YOKE SETTING LEVER SWITCH LEVER FOR START/STOP BUTTON SETTING STEM AO-3 SEIKO Watch Oil S-6 9/18... - Page 10 TECHNICAL GUIDE Cal. 7T11A ● Gear train mechanism After setting the TRAIN WHEEL BRIDGE and as illustrated PIN FOR TRAIN WHEEL BRIDGE lubricate the upper pivots of the following parts: below, • ROTOR, ROTOR FOR SECONDS COUNTING, 31 ROTOR FOR MINUTE...
- Page 11 TECHNICAL GUIDE Cal. 7T11A ● Gear train mechanism Setting position and lubricating 27 HOUR COUNTING MINUTE COUNTING 31 ROTOR FOR 25 MINUTE COUNTING MINUTE COUNTING WHEEL INTERMEDIATE INTERMEDIATE WHEEL 4146 710 0270 582 WHEEL (white plastic) 0950 590 (white plastic)
- Page 12 TECHNICAL GUIDE Cal. 7T11A 47 MAIN PLATE Lubricating 12/18...
- Page 13 BLOCK” below). When measuring the current consumption using the SEIKO Multi-Tester S-860, use the range of 4 µ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S). 2. Repeat the same procedures as 2. and 3. of measuring current consumption for the whole movement above.
- Page 14 TECHNICAL GUIDE Cal. 7T11A [Structure of the CIRCUIT BLOCK] Input terminal (+) Input terminal (-) C-MOS-IC Output terminal Output terminal Crystal unit Output terminal ● Value checking – coil resistance (coil blocks) Check the resistance of each coil block if they are within the range in the following table.
- Page 15 TECHNICAL GUIDE Cal. 7T11A ● Function check Before doing the following function check, follow the instructions on P.3 to correct the hand positions, set the time and operate the stopwatch function. Operation Function Check point Pull out the crown to...
- Page 16 TECHNICAL GUIDE Cal. 7T11A ● Water resistance test Check the water resistance according to the designated specification of the watch. Marking on the case back Water resistance test Applied pressure WATER RESISTANT (WATER RESIST) Air overpressure test 3 BAR WATER RESIST 5 BAR...
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Page 17: Troubleshooting
TECHNICAL GUIDE Cal. 7T11A TROUBLESHOOTING Symptom Possible causes Solutions Measure the bat ter y voltage. Movement The watch stops operat - The battery has been depleted. Replace the battery with a new ing. one. The hour wheel and the pinion of... - Page 18 TECHNICAL GUIDE Cal. 7T11A Symptom Possible causes Solutions O n e o r m o r e S T O P WATCH Measure the coil block resist - STOPWATCH The relevant coil is broken. h a n d s h a v e stopped ance.
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