BRONICA - Bronica etrsi film back repair manual

Comprehensive technical manual for repair and maintenance of the Bronica ETRSI film back system. This workshop guide covers complete disassembly and reassembly of the film loading mechanism for 120 and 220 film formats, with step-by-step procedures and precise technical illustrations for each operation. Key sections address right side cover removal, counter and winding base plate disassembly, extraction of counter gears and release levers, and removal of the right light-tight frame and counter roller assemblies. The manual includes detailed procedures for film start position adjustment, counter mark verification, and critical component alignment essential to proper film back operation. Troubleshooting sections tackle common failures including winding stopper malfunction, inadequate film advance, rear cover operation issues, and light leaks, each supported by diagnostic flowcharts and specific remedial solutions. Repair procedures cover proper lubrication of mechanisms, replacement of worn components, and realignment of sensitive assemblies. Reassembly notes detail essential precautions and critical verifications required to restore normal film back operation. Technical content includes exploded diagrams of major assemblies, detailed parts identification, and specification data for both 120 and 220 film formats.