Seiko Quartz Cal. 1E20A & 1E50A Technical Guide
Technical guide for Seiko quartz movements Cal. 1E20A and 1E50A. Provides complete specifications including movement size (Ø9.5 mm / Ø12.8 mm), height (2.7 mm), battery type (Maxell SR5125W, 1.55V), and 5 jewels. Includes detailed circuit block structure schematics, disassembly and reassembly procedures with lubrication points, and parts identification through numbered diagrams. Comprehensive checking and adjustment section covers output signal verification, battery voltage testing, coil block function, reset condition confirmation, frequency accuracy, and current consumption measurement.
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Document Details
- Format
- Pages
- 5
- Size
- 214.4 KB
- Category
- Watchmaking