BELL & HOWELL - bh projector 245bay baj

Comprehensive service manual for Bell & Howell Design 245BAY and 245BAJ 8mm autoload motion picture projectors. This technical reference provides complete maintenance, repair and adjustment procedures for these professional projection devices. Features detailed introduction explaining auto-threading principles, including film path schematics and illustrated self-threading sequences. Main sections systematically cover disassembly procedures (indexed part removal with specific precautions for each assembly), reassembly and adjustments (complete lubrication table specifying Bell & Howell grease 1956 and oil 1543 for each component). Manual details critical adjustments: take-up and rewind torque values, shuttle tooth protrusion (with specialized gauge procedure), optical axis alignment and picture framing. Final test section includes safety shutter operation verification, optical alignment checks and operational performance testing. Comprehensive troubleshooting guide addresses six major issue categories (inoperative projector, picture flicker, film scratches, soft focus, auto-threading failure, noise) with probable causes and specific remedies for each. Detailed parts catalog featuring numbered exploded views and complete component listings to facilitate parts ordering. Includes wiring diagrams for both BAY (90-110V AC 50/60 cycle) and BAJ (117V AC) models. Essential reference for projection technicians and specialized repair facilities.