Sony Service Manual for AV-3400 Videocorder and AC-3400 Power Supply/ Battery Charger. Illustrated black and white photographs and three color diagrams. 8 1/2 in. by 11 in. 108 pages in orange binder. Includes General Description, Disassembly, Power Supply Alignment, Servo System Alignment, Video System Alignment, Audio System Alignment, Mechanical System Maintenance, Circuit Description, Tape Transport Description, Block Diagram, Schematics and Exploded View, October 1970 Complete Spare Parts List for AV-3400. Hand written note by Ralph Hocking on 10 pin cable pin outs.