BELL & HOWELL - bh projector 202 302

Comprehensive service manual for Bell & Howell Filmosound 16mm optical-magnetic projectors, models 202 and 302. This workshop reference provides technicians with complete disassembly and reassembly procedures, repair techniques, and maintenance protocols for these dual-format sound projectors. The manual opens with an extensive troubleshooting guide covering optical sound dropout, magnetic playback and recording failures, level control problems, flutter, noise, and other operational defects. Progressive disassembly sections walk through every major assembly—amplifier, projector gate, drive mechanism, sound drum, magnetic playhead stack, film stabilizers, film transport path, blower assembly, motor governor, and external casing—with exploded diagrams and component callouts for each stage. Repair procedures address critical adjustments including motor speed control, pressure plate tension and alignment, magnetic head gap and azimuth positioning, and sound system calibration. A dedicated section profiles the specialized Bell & Howell service tools required for proper maintenance work. The complete parts catalog cross-references every component by part number with model applicability codes distinguishing 202 and 302 variations. Electrical schematics and wiring diagrams document the amplifier and control circuits in full detail. Includes cleaning and lubrication schedules, final performance testing procedure, and recommended test equipment specifications for service stations. This is an essential reference for anyone performing warranty service, field repair, or restoration work on these projectors.