Radio Corporation of America (RCA). Broadcast and Television Equipment. Industrial Electronic Products. Instructions: TM-21D Color Monitor, MI-40226-D. Table of Contents: Technical Data, Tube Complement, Recommended Test Equipment, Description, General Decoder Theory, Decoder Circuit Detailed Description, 3 Channel Video Amplifier, Deflection and HV, Power Supply, Convergence, Kinescope Filament Regulator Circuit Description, Installation, Front Panel Controls, Setup, Operation, Kinescope, Alignment, Maintenance, Replacement Parts List. List of Illustrations: TM-21D Color Monitor, Block Diagrams (TM-21D Color Monitor, General Decoder Theory, 3 Channel Video Amplifier Alignment Test Equipment Setup (preferred and alternate methods), 3 Channel Video Amplifier, Decoder, Deflection and HV, Power Supply), Rear Quarter View, TM-21D Color Monitor Top and Side Cover Panels Removed, Functional Diagram (Brightness Pulse), Tube Side (Decoder Chassis, 3 Channel Video Amplifier Chassis, Deflection and HV Chassis, Power Supply Chassis), Simplified Schematic Diagram (Decoder Demodulators), Waveforms (Decoder Demodulators), Control Side (Convergence Chassis), Front Panel Control Section and Convergence Chassis, Positioning Kinescope Accessories, Front Quarter View (Kinescope Section Lowered), Blue Lateral Magnet and Convergence Magnet Locations, Alignment Waveforms (3 Channel Video Amplifier, Decoder, and Deflection and HV), Wire Side (3 Channel Video Amplifier Chassis, Decoder Chassis, Deflection and HV Chassis, Power Supply Chassis, Convergence Chassis), Typical Waveforms (3 Channel Video Amplifier, Decoder, and Deflection and HV), Kinescope Filament Voltage Regulation Waveforms, Schematic Diagrams (3 Channel Video Amplifier, Deflection and HV, Decoder, Power Supply and Convergence) and an Interconnection Diagram.