Seiko 6T63A User Manual

PARTS CATALOGUE / TECHNICAL GUIDE
Cal. 6T63A
[SPECIFICATIONS]
Cal. No.
Item
Interval of hands movement
Driving system
Additional function
Loss/gain
Regulation system
Gate time for rate measurement
Power
supply
Battery No.
Battery voltage
Battery life
Number of jewels
1/19
Crown
operation
Normal position
1st click position
2nd click position
Current consumption
Coil resistance
1 second
0 jewel
Stepping motor, 2 pieces
• Stopwatch function
60-minute stopwatch in one second increments.
• Second hand stop function
4002054 (COIL BLOCK A)
1.45 - 1.65 K
Ω
Use 10-second gate.
SEIKO SR936SW
Nil
1.55 V
Approx. 3 years
6T63A
• 3 hands (hour, minute, and
small second hand)
• 24-hour indicator
• Date indicator
4002055 (COIL BLOCK B)
1.65 - 1.85 K
Ω
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)
• Diameter
Outside: Ø 30.8 mm Casing: Ø 29.0 mm
• Height: 5.1 mm
Movement: Less than 2.70 μA
Circuit block: Less than 0.70 μA

Seiko 6T63A Specifications

General

Movement Type	Quartz
Caliber	6T63
Water Resistance	100 meters
Case Material	Stainless Steel
Crystal	Hardlex
Dial Color	Black
Display	Analog
Battery Life	Approximately 3 years
Accuracy	±15 seconds per month
Functions	Date
Strap Material	Stainless Steel

Summary

Battery Replacement Procedure

Hand Setting After Battery Change

Steps for resetting hands after battery replacement.

Movement Disassembly and Reassembly Remarks

Setting Stem Removal Procedure

Battery Removal and Installation

Explains how to remove and install the battery.

Chronograph Function Setting Procedures

Switch Lever Setting Instructions

Inspection and Measurement Procedures

Measure Movement Current Consumption

Details measuring current for the entire movement.

Measure Circuit Block Current Consumption

Details measuring current for the circuit block only.

Coil Resistance Verification

Coil Block Resistance Values

Water Resistance Testing Standards

Water Resistance Test Specifications

Troubleshooting: Movement Issues

Watch Stops Operating Troubleshooting

Addresses causes and solutions for a non-operating watch.

Troubleshooting Current Consumption

Solves problems with high current consumption.

Troubleshooting: Stopwatch and Exterior

Stopwatch and Button Problem Solving

Solves abnormal stopwatch hand movement and button issues.

Exterior Part Problem Solving