Seiko Digital Quartz Cal. A927A A939A Technical Guide
Technical service manual for Seiko digital quartz watches caliber A927A and A939A. Covers specifications, circuit block structure, display functions (time, calendar, stopwatch, alarm with 12/24 hour indication), disassembly and reassembly procedures, lubrication instructions, and comprehensive checking and adjustment procedures including battery voltage, battery conductivity, current consumption, water resistance, liquid crystal panel contact verification, accuracy testing, and functioning checks. Includes detailed circuit diagrams showing segment relationships and C-MOS-LSI output terminal connections.
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Document Details
- Format
- Pages
- 5
- Size
- 307.3 KB
- Category
- Horlogerie