Cal Y785A Digital Quartz Watch Technical Guide and Parts List
Complete technical guide and parts list for the Seiko Cal Y785A digital quartz watch movement. This service manual covers full specifications, operational temperature range (-30°C to +50°C), and detailed display functions including time, stopwatch, alarm, and time-setting procedures. Comprehensive movement diagrams show both front and rear views for workshop reference. Step-by-step disassembly, reassembly, and lubrication procedures are explained for maintenance and repair work. The movement features a nematic liquid crystal display with FEM technology for reliable low-temperature operation. Battery options include Maxell CR2016, Matsushita BR2016, or Sanyo CR2016 cells (3.0V nominal, ~5 year lifespan under normal conditions). Accuracy specification: less than 20 seconds monthly rate loss within normal operating temperature range. Case dimensions: ⌀28.1 mm × 4.9 mm. Complete parts list included for ordering and identifying all service components.
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Document Details
- Format
- Pages
- 5
- Size
- 255.5 KB
- Category
- Watchmaking