Seiko 4K22A Movement Parts Catalogue and Technical Guide
Service manual and parts catalogue for the Seiko 4K22A quartz movement, covering the complete moon phase complication. Includes detailed exploded diagrams of all movement components with numbered parts reference (items 1–40), step-by-step disassembly and reassembly instructions, and lubrication schedules for proper maintenance. Documents the 3-hand display configuration with stepper motor drive, moon phase disc and instant moon phase adjustment mechanism, train wheel positioning device, and electronic circuit reset function. Covers circuit block architecture, battery specifications (SR621SW type, 1.55V nominal, approximately 2-year operational life), and test parameters for coil resistance and current draw. Includes technical notes on electronic calibration and value checking procedures essential for workshop repair and adjustment.
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Document Details
- Format
- Pages
- 7
- Size
- 186.8 KB
- Category
- Watchmaking