Seiko Quartz Cal. 5C20A, 5C23A Parts Catalogue
Seiko Quartz Cal. 5C20A and 5C23A parts catalogue and workshop guide. Contains detailed exploded-view diagrams with numbered component references for both movement calibres. Technical specifications include 32,768 Hz oscillator frequency, step motor drive architecture, and rotary step switch regulation system. Features hand installation procedures, complete disassembly and reassembly instructions covering the setting mechanism, gear train, and coil block assembly. Includes systematic checking and adjustment protocols: accuracy verification, battery voltage testing, current consumption measurement, and alarm system verification procedures. Battery compatibility listed: SEIKO TR721W, Maxell SR721W (1.55V). Comprehensive indexed parts list with manufacturer part numbers for precise component identification and ordering. Essential reference for technicians servicing these widely-used quartz movements.
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Document Details
- Format
- Pages
- 10
- Size
- 420.9 KB
- Category
- Watchmaking