PETRI - Petri 7S Service Manual

Comprehensive service manual for the PETRI 7S rangefinder camera, published by PETRI Camera Company, Inc. This manufacturer-authorized technical repair guide delivers detailed procedures for maintenance, troubleshooting, and restoration of this classic camera. The manual is organized into three primary sections covering the full scope of service operations. The opening section addresses common mechanical issues and fundamental repairs, including the film advance and rewind mechanisms, shutter assembly, aperture control, self-timer, flash synchronization, exposure and countdown counters, and rangefinder operation. The second section presents precise adjustment procedures essential for returning the camera to factory specifications: wind gear pawl calibration, film transport distance modification, escapement fine-tuning for slow speeds, self-timer gear adjustment, shutter speed calibration, MX delay action gear and flywheel settings, flash sync contact alignment, exposure counter indexing, and rangefinder accuracy verification. The third section outlines a systematic final inspection protocol to verify all functions operate correctly. An appendix furnishes a complete table of specialized service tools required for disassembly and adjustment work. This workshop manual serves as an essential reference for camera repair technicians and restoration specialists working with vintage rangefinder equipment, offering authoritative guidance for returning these instruments to proper working condition.