CONTAX - Contax 139 Repair Manual

Complete repair manual for the Contax 139 Quartz camera, updated in accordance with Yashica Inc. memorandum dated August 7, 1980. This technical document provides comprehensive procedures for disassembly, inspection, and repair of the camera body and all electronic components. The manual covers complete exterior disassembly including removal of upper and lower covers, release of optical and mechanical elements. It details access to the front system and exposure system with reinforcement plates and critical assemblies. A major section covers mirror box removal and adjustment procedures, including precise instructions for magnet adjustment and optical element positioning. The document provides detailed instructions for shutter curtain removal, base plate battery replacement, and winding spool system assembly. Electrical procedures address complete amplifier replacement, S-LED positioning, and critical electronic circuit adjustments. The manual presents detailed electrical schematics, voltage control tables, timing diagrams, and a comprehensive list of electrical failure causes with corresponding troubleshooting solutions. Designed for experienced technicians and repair specialists, this guide provides all technical information required to fully restore this camera to original specifications. Includes precise component identification, part numbers, adjustment tolerances, and systematic diagnostic procedures for addressing malfunction across mechanical and electronic systems.