The preventive maintenance system for audiovisual equipment presented in this handbook is designed by specialists so that it can be used by nonspecialists in school sites. The report offers specific advice on saftey factors and also lists major problems that should not be handled by nonspecialists. Other aspects of a preventive maintenance system discussed are recordkeeping and tools and supplies. Troubleshooting procedures are grouped across equipment types where symptoms and recommendations are generalizable (most frequently among types of projectors). In addition, procedures specific to videotape recorders, audiotape recorder/players, and turntable record players are described. Preventive maintenance checklists are given for overhead and opaque projectors, 35mm filmstrip projectors, 8mm and 16mm motion picture projectors, record players, audiotape recorders and players, and videotape recorders and players. The checklists have been designed so that they may be used as record-keeping forms. The checklists integrate weekly, monthly, and quarterly functions in a logical progression. Hours of use are indicated as an alternative to calendar scheduling for maintenance. (MLF)