1984 Sony Walkman Professional Stereo Cassette-Corder WM-D6C Analog Audio, Compact Cassette, Gyártók, Magnó, Walkman Sony WM-D6C Service Manual https://audiomuzeum.hu/wp-content/uploads/1980/1984%20Sony%20Walkman%20Professional%20WM-D6C/Sony-WM-D6C-Walkman-Pro.mp4