Seiko Quartz Cal. 8621A/8620A Technical Guide
Technical guide for Seiko Quartz movements Cal. 8621A and Cal. 8620A. Covers specifications, circuit block structure, disassembly and reassembly procedures with detailed illustrations, lubrication instructions, and checking/adjustment procedures including output signal verification, battery voltage and conductivity checks, coil block testing, reset and train wheel settings, accuracy measurement, and current consumption analysis.
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Document Details
- Format
- Pages
- 5
- Size
- 234.0 KB
- Category
- Horlogerie