Seiko Quartz Cal. 7320A 7321A Technical Guide
Seiko Quartz Cal. 7320A 7321A Technical Guide — comprehensive service manual for these two automatic quartz movements. Covers movement specifications, circuit block architecture, and step-by-step disassembly and reassembly of the hand-setting mechanism and clutch wheel regulation system. Includes practical procedures for verifying and adjusting output signal characteristics, battery voltage and conductivity checks, coil block performance, rotor and train wheel calibration, timekeeping accuracy adjustment, and current consumption measurement. Features detailed exploded diagrams and full component identification to support troubleshooting and maintenance work on these Seiko calibers.
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Document Details
- Format
- Pages
- 5
- Size
- 204.3 KB
- Category
- Watchmaking