Seiko Cal. 7D48A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 7D48A automatic generating system quartz watch movement. This service manual provides detailed specifications and functional descriptions of the power save and time relay systems, perpetual calendar operation, and step-by-step assembly diagrams with numbered component identification. Exploded views illustrate the internal architecture of key subassemblies including the step motors, piezoelectric motor for calendar advancement, rechargeable battery unit, and calendar mechanism wheels. An essential reference for technicians performing maintenance, repair, or complete movement overhaul on this hybrid mechanical-quartz caliber.
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Document Details
- Format
- Pages
- 8
- Size
- 1.8 MB
- Category
- Watchmaking