Singer-General Precision, Inc. Singer Education & Training Products. GPL Division (Part No. G5486-001). Operating and Service Instruction Manual: Precision 990 Television Camera. Table of Contents: Description and Leading Particulars, Installation and Operation, Theory and Maintenance, Electrical Parts List, and GLOSSARY Terms Useful in Television Service Work as defined by EIA (where available). List of Illustrations: Precision 900 Camera (Dimensional Drawing (G5486-000), Video Amplifier Module, Pulse and Deflection Module, Power Supply Module and Video Amplifier Module, Do's and Don't's of Use of Vidicons, How the Resolution Chart Should be Positioned on the Vidicon Target Area, Relationship Between the Top of Sync and Video Black Level, Video Signal When Pedestal Control is Properly Adjusted, Precision 900 Camera (Functional Block Diagram, Video Amplifier Module: Location of Parts and Schematic Diagram, Pulse and Deflection Module: Location of Parts and Schematic Diagram, Power Supply Module: Location of Parts and Schematics, Main Frame Showing Component Locations of Parts, and Main Frame Assembly, Schematic Diagram). List of Tables: Specifications and Features, Location and Function of Operation and Adjustment Controls.