Seiko Quartz Cal. 3421A & 3423A Technical Guide
Technical guide for Seiko Quartz Cal. 3421A and Cal. 3423A movements. This reference manual provides detailed specifications covering movement size, casing diameter, height, regulation system, battery information, and jewel count. The circuit block architecture section illustrates the structural layout of both front and back circuit block configurations. Procedures for checking and adjustment include output signal verification, hand setting condition checks, battery voltage and conductivity testing, coil block resistance measurement, reset and second hand setting conditions, gear train mechanism alignment, setting and calendar mechanism operation, accuracy verification, current consumption analysis, water resistance assessment, and appearance and functioning checks. An essential technical reference for watchmakers servicing these Seiko quartz calibers.
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Document Details
- Format
- Pages
- 5
- Size
- 209.5 KB
- Category
- Watchmaking