SPT - Copal SVE

Comprehensive service manual for the Copal SVE shutter mechanism as fitted to the Yashica Lynx 14E camera. Published by the Society of Photo-Technologists in May/June 1972, this workshop reference delivers the technical depth technicians need to service, troubleshoot, and maintain this precision shutter to factory specifications. The manual begins with pre-disassembly test documentation showing shutter speed accuracy across the complete range—1 second through 1/500th second—alongside flash synchronization performance in both X and M modes, with all measurements expressed as percentage deviations from 100% accuracy. The core sections walk through complete disassembly procedures with step-by-step guidance on removing filter ring assemblies, shutter speed indicator rings, exposure resistor band assemblies, speed cam mechanisms, and internal components that require access for service. Each procedure is supported by annotated photographs showing the shutter front assembly, retaining rings, shutter front plate, and diaphragm indicator ring configurations in detail. Beyond disassembly, the manual covers mechanical assembly procedures, lubrication points and specifications, internal mechanism identification, and comprehensive reassembly techniques. The result is both a troubleshooting guide and maintenance manual that allows technicians to restore Copal SVE shutters to original performance standards.