Seiko Digital Quartz Cal. 0644A & 0664A Technical Guide
Seiko Digital Quartz Cal. 0644A and 0664A Technical Guide — comprehensive technical reference for authorized service centers and qualified technicians. Provides complete operating specifications, display and button function details, and step-by-step time setting procedures. Includes detailed disassembly and reassembly instructions for both case and movement components, with illustrated cleaning protocols. Features a comprehensive checking and adjustment section with troubleshooting guidance. Essential reference for service and maintenance of these digital quartz models.
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 14
- Size
- 611.1 KB
- Category
- Watchmaking