Hattori Seiko V803A Movement - Parts Catalog & Technical Guide
Complete parts catalog and technical guide for the Hattori Seiko V803A quartz watch movement. This service manual provides detailed specifications for the 3-hand dial configuration, 18.4mm case diameter, and 2.5mm movement height, along with step-motor driving system architecture. Disassembly and reassembly procedures are illustrated across 33 numbered exploded views, supported by a comprehensive parts list with factory reference numbers for accurate component identification and ordering. Lubrication specifications detail the use of Moebius A and SEIKO Watch Oil S6 for proper movement maintenance. Battery information covers compatible types including SR621SW and SR215W cells rated at 1.68V with typical 2-year service life. The guide includes a circuit block structure diagram for understanding electrical architecture, value-checking procedures for coil block resistance (2.3–2.7kΩ tolerance) and current consumption verification (less than 1.2µA under load), plus practical notes on winding stem removal, train wheel setting lever positioning, and train wheel bridge assembly techniques essential for successful service work.
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Document Details
- Format
- Pages
- 3
- Size
- 146.4 KB
- Category
- Watchmaking