MAMIYA - Mamiya M645 Super Body TechBulletin

Comprehensive set of technical bulletins for the Mamiya M645 Super camera body covering multiple significant modifications and improvements implemented from 1987 onwards. These technical documents detail design corrections and enhancements developed to address issues identified during production and field use. The S-button guide bulletin documents a modification that prevents component separation by implementing a unified part design, effective from October 1987. A separate bulletin addresses new spare parts availability, specifically the BC button guide (part number 6200 27561) with assembly instructions using commercially available quick-bond adhesive, supplied from May 1987. The new angel plate bulletin resolves signal pin operational issues through shape modification of the part (6200 17172), introduced in May 1987 production. A detailed bulletin on mirror mechanism improvement corrects the sudden mirror release problem during crank rewinding through the addition of a supplementary spring (6200 13432) and modification of its geometry. The final bulletin covers M-base plate improvement addressing signal lever malfunction by modifying the lever shape (C) beginning March 1987 production, including detailed replacement instructions with edge finishing requirements. These technical bulletins provide essential documentation for M645 Super maintenance technicians and restoration specialists, offering precise part numbers, modification dates, and assembly procedures.