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 workshop manual provides comprehensive procedures for disassembly, inspection, and repair of the camera body and all electronic components. Coverage includes complete exterior disassembly with detailed removal of upper and lower covers and release of optical and mechanical elements. The guide details systematic access to the front optical system and exposure metering system, including reinforcement plate positioning and critical mechanical assemblies. A substantial section covers mirror box removal and precise adjustment procedures, with explicit instructions for magnet adjustment and optical element centering. The manual addresses shutter curtain removal, base plate battery replacement procedures, and winding spool system reassembly. Electrical repair sections cover complete amplifier replacement, S-LED positioning and alignment, and critical electronic circuit calibrations. Detailed electrical schematics, voltage control reference tables, timing diagrams, and comprehensive troubleshooting charts document electrical failure causes and corresponding diagnostic solutions. Component identification remains precise throughout, with original part numbers, adjustment tolerances, and systematic diagnostic procedures for resolving mechanical and electronic malfunctions. This service manual delivers the technical depth required for thorough restoration of this model to original factory specifications.