Servicing Vintage Record Changers Theory, How They Work, Maintnance, Troubleshooting, and Servicing of Automatic Record Changers Looking for Record Changer Service Manuals? How They Work - Philco's Record Changer Handbook Published in 1952, this 16 page Record Changer Handbook covers: Composition of Records Cutting Records Sound Reproduction Pickups and Recording Mechanisms Switches Operation Cycle Record-Player Motors Turntable Speed Reduction Motor Failures Wow and Rumble Philco's Servicing Record Changers Published in 1958, this 23 page Record Changer Service Guide covers general service of Philcos "M" series Record Changers but aplies to other makes in general also. It includes: Changer adjustments Service Lubrication Parts Replacement Operating Cycles Tonearm Adjustments Needle Pressure Troubleshooting 45 R.P.M. Adaptor Spindles Looking for Record Changer Service Manuals?