Seiko Digital Quartz Cal. F421A Technical Guide
Technical guide for Seiko Digital Quartz Cal. F421A watch movement. Includes specifications, disassembly and reassembly procedures for case and module, lubrication instructions, checking and adjustment procedures for battery voltage, pattern segment checking system, liquid crystal panel and connector conductivity, circuit block testing, current consumption, accuracy, and switch components. Features nematic liquid crystal display with FEM mode, 12-hour time display with date and calendar functions, 32.768 Hz quartz oscillator, and silver peroxide battery (SEIKO TR912SW). Contains detailed exploded views and step-by-step assembly instructions.
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Document Details
- Format
- Pages
- 13
- Size
- 452.6 KB
- Category
- Horlogerie