This manual pertains to the Bell & Howell 1623 projector, a piece of audio-visual equipment designed for 16mm film projection. Known for its robust engineering, this model offers reliable performance for its intended use. Key features include manual threading for film loading, an optical sound system, and an electric motor driving projection at a standard 24 frames per second. The projector is compatible with interchangeable lenses and utilizes a Tungsten-Halogen lamp, operating on AC mains power with voltage options of 110-120V or 220-240V at 50/60 Hz.

The purpose of this user manual, presented in French and comprising 10 printed pages, is to provide comprehensive guidance for the operation and maintenance of the Bell & Howell 1623 projector. It covers essential procedures such as proper cleaning techniques for lenses and general dusting, as well as recommendations for periodic lubrication of moving parts. This documentation serves as a vital resource for owners and technicians to ensure the continued optimal performance and longevity of the film projection equipment.