Table of Contents
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PARTS CATALOGUE / TECHNICAL GUIDE
Cal. No.
Item
• 3 hands (hour, minute, and
small second hand)
• 24-hour indicator
• Date indicator
Interval of hands movement
Driving system
Additional function
Normal position
Crown
operation
1st click position
2nd 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. 6T63A
• Diameter
Outside: Ø 30.8 mm
• Height: 5.1 mm
1 second
Stepping motor, 2 pieces
• Stopwatch function
60-minute stopwatch in one second increments.
• Second hand stop function
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)
Nil
Use 10-second gate.
Movement: Less than 2.70 μA
Circuit block: Less than 0.70 μA
4002054 (COIL BLOCK A)
1.45 - 1.65 KΩ
4002055 (COIL BLOCK B)
1.65 - 1.85 KΩ
SEIKO SR936SW
1.55 V
Approx. 3 years
0 jewel
1/19
6T63A
Casing: Ø 29.0 mm
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Related Manuals for Seiko 6T63A
Summary of Contents for Seiko 6T63A
- Page 1 PARTS CATALOGUE / TECHNICAL GUIDE Cal. 6T63A [SPECIFICATIONS] Cal. No. 6T63A Item • 3 hands (hour, minute, and • Diameter small second hand) Outside: Ø 30.8 mm Casing: Ø 29.0 mm • 24-hour indicator • Date indicator • Height: 5.1 mm...
- Page 2 Cal. 6T63A SPECIFICATIONS Cal. 6T63A has a new structure employing one crown and two buttons. The construction of chronograph mechanism is based on Cal. 8R28 mechanical chronograph watch by using the one-piece 3 pointed reset hammer. While other Swiss-made watches are using separate hammers which require an assembly and adjustment of the hammers, the one-piece hammer design realizes maximum durability and stability of the component and easier maintenance.
- Page 3 Cal. 6T63A SPECIFICATIONS ● Measurement functions Accumulated elapsed time measurement and split time measurement are available. Standard measurement Button A Button A Button B → → START STOP RESET A ccumulated elapsed time measurement Button A Button A Button A...
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Page 4: Parts List
PARTS LIST Cal. 6T63A Type of oil Oil quantity mark AO-3 Disassembling procedures Figs. : SMALL QUANTITY AO-2 NORMAL QUANTITY Reassembling procedures Figs. : LIBERAL QUANTITY DATE INDICATOR MAINTAINING PLATE SCREW 0012354 DATE INDICATOR MAINTAINING PLATE 0808052 DATE DIAL 0878***... - Page 5 PARTS LIST Cal. 6T63A HOUR WHEEL 0273*** SWITCH LEVER HOLDER SCREW 012354 SWITCH LEVER HOLDER 0837005 SWITCH LEVER A 4450017 SWITCH LEVER B 4450018 DATE CORRECTOR SETTING TRANSMISSION WHEEL C 0962891 DATE CORRECTOR SETTING TRANSMISSION WHEEL B 0962013 For parts , please refer to the page 10.
- Page 6 PARTS LIST Cal. 6T63A 15 SWITCH SPRING SCREW 0016121 15 SWITCH SPRING SCREW 0016121 SWITCH SPRING 4250*** 17 SECOND COUNTING WHEEL FRICTION SPRING 0353018 18 CHRONOGRAPH BRIDGE 0190007 HAMMER OPERATING LEVER B 0587006 CHRONOGRAPH HAMMER COUPLING LEVER 0585013** 0581007 SECOND...
- Page 7 PARTS LIST Cal. 6T63A 27 LOWER PLATE FOR CHRONOGRAPH BRIDGE SCREW LOWER PLATE FOR 0016121 CHRONOGRAPH BRIDGE 0186002 29 CIRCUIT BLOCK SPACER 4408149 30 CIRCUIT BLOCK 4004253 32 TRAIN WHEEL BRIDGE 0125316 31 BATTERY CONNECTION (-) 4270336 33 MINUTE COUNTER...
- Page 8 PARTS LIST Cal. 6T63A 44 THIRD WHEEL AND PINION 0231043 43 RESET LEVER 4455006 45 FOURTH WHEEL AND PINION 0144002 50 TRAIN WHEEL SETTING LEVER 46 MINUTE WHEEL 0391028 AND PINION 0261026 51 COIL BLOCK SCREW 0012354 47 SETTING WHEEL...
- Page 9 PARTS LIST Cal. 6T63A ● Tools and consumables required for disassembling/reassembling • Movement holder UNIVERSAL MOVEMENT HOLDER (S-682) • Watch oils SEIKO watch oil AO-3 (or Moebius A) and AO-2 (or Moebius F) AO-3 AO-2 9/19...
- Page 10 ● 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 11 TECHNICAL GUIDE Cal. 6T63A REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT ● How to remove the SETTING STEM before dismantling the movement Crown position: normal (=0) position. Push the "A" on the SETTING LEVER gently(refer to the picture on the right) in order to disengage it from the SETTING STEM.
- Page 12 TECHNICAL GUIDE Cal. 6T63A ● Remarks for the lubrication Oil quantity mark Type of oil Hammer AO-3 SMALL QUANTITY AO-2 NORMAL QUANTITY LIBERAL QUANTITY There must be oil within the range of the arrow. Lower plate for chronograph bridge Note *1: Oiling should be done on the pointed spot of marked place.
- Page 13 TECHNICAL GUIDE Cal. 6T63A ● Remarks for setting position of the spring of chronograph function Lower plate for Train wheel stop lever chronograph bridge Hammer operating Hammer lever A Hammer operating Chronograph coupling lever B lever Setting position ● Remarks for setting position of the SWITCH LEVER A and B...
- Page 14 * When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40 μ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S). 2. Connect the AC component to the positive terminal for 2 seconds until a short circuit occurs to reset the integrated circuit.
- Page 15 TECHNICAL GUIDE Cal. 6T63A [Structure of the CIRCUIT BLOCK] C=MOS=IC Input terminal (-) Input terminal (+) Output terminal(CG) Crystal unit Output terminal(hand moving) ● Value checking – coil resistance (coil blocks) Check the resistance of each coil block if they are within the range in the following table.
- Page 16 TECHNICAL GUIDE Cal. 6T63A ● Function check Operation Function Checkpoint Pull out the crown to the 2nd c lic k M a k e s u r e t h a t i t Setting mechanism and push it back...
- Page 17 TECHNICAL GUIDE Cal. 6T63A ● Water resistance test Check the water resistance according to the designated specification of the watch. Marking on the case back Test method Applied pressure WATER RESISTANT (WATER RESIST) 3 BAR Air leak test WATER RESIST 5BAR...
- Page 18 TECHNICAL GUIDE Cal. 6T63A TROUBLESHOOTING Symptom Possible causes Solutions Measure the bat ter y voltage. Movement The watch stops operating. The battery has been depleted. Replace the battery with a new one. The hour wheel and the pinion of Check the relevant par ts, and...
- Page 19 TECHNICAL GUIDE Cal. 6T63A Symptom Possible causes Solutions Measure the coil block resistance. STOPWATCH O n e o r m o r e S T O P - The relevant coil is broken. Replace the coil with a new one if W A T C H h a n d s h a v e necessary.