Sony Corporation. TRI EA-3 Editing Control Unit Operating Instructions. The Table of Contents holds the following Sections: General Information, Operating Procedures, and Installation. List of Illustrations: Tape-To-Tape Editing, On Air Switching, Camera-To-Tape Editing, Edit Logic Board, Audio/Servo Board. Handbook includes the following schematics: EA-3 Interconnect Wiring Diagram, P.C.B. Assembly, Servo/Audio Amplifier, Logic- Schematic, P.C.B. Assembly, Logic Board and Mother Board, Editing Control Circuit Section (VEP0657A), and a TRI EA-3/ Panasonic NV-9200/NV-9500 Interface Relay Schematic. This ultimate diagrams are found in the appendix, titled TRI EA-3/ Panasonic NV-9500 and NV-9200 Modification Procedures. This section is further broken down into the following: Panisonic Mod Kit Packing List, Uncasing Procedure, Capstan Motor Modification Procedure, Interface Relay Harness Installation, and the aforementioned diagrams.