Cal. Y661A & Y662A Digital Quartz Technical Data
Technical data document for Seiko calibers Y661A and Y662A digital quartz movements. Provides detailed specifications including display medium (nematic liquid crystal with FEM), casing diameter (17.5 mm), height (4.4 mm), and battery information (MAXELL SR721W, 1.55V). Includes circuit block schematic with component identification, cleaning protocols with parts classification, and checking and adjustment procedures covering battery voltage testing, circuit block diagnostics, current consumption measurement, timekeeping accuracy verification, speaker block operation, switch component functionality, and operational checks. Contains detailed technical diagrams illustrating case construction, battery placement, module assembly, and winding stem mechanism. Essential reference documentation for technicians servicing these digital quartz movements.
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Document Details
- Format
- Pages
- 8
- Size
- 453.6 KB
- Category
- Watchmaking