PUBLICATION TSM 20-311 TECHNICAL MANUAL 20 WATT UHF AMPLIFIER FOR MX20U SERIES TV TRANSMITTER/TRANSLATOR LARCAN INC.
MX Series - 20 Watt UHF AMPLIFIER Section Title Page NOTICES, ETC. ..................................................................................................................3 SAFETY AND HEALTH WARNINGS ............................................................................. 4&5 GENERAL SERVICE INFORMATION 1) Parts Lists Explained..........................................................................................5 2) Interpreting LARCAN Drawing Numbers....................................
MX Series - 20 Watt UHF AMPLIFIER Section Title Page PUB99-38 Heatsink Assembly (Prefix 2): 1. Heatsink Assembly Description............................................................38-1 2. Front End Module.................................................................................38-2 3. IPA1 Module.........................................................................................38-2 4. PA Module............................................................................................
MX Series - 20 Watt UHF AMPLIFIER NOTICES, ETC.: THIS EQUIPMENT USES STATIC-SENSITIVE CMOS INTEGRATED CIRCUITS. Observe proper handling precautions (indicated in Maintenance Sections) at all times when working with this equipment. TOXIC MATERIALS NOTICE... IMPORTANT... Effective thermal management in certain semiconductor devices in this equipment is possible only through the use of Beryllium Oxide ceramic materials.
MX Series - 20 Watt UHF AMPLIFIER TRANSMITTER SAFETY PRECAUTIONS: AC VOLTAGES USED FOR THE OPERATION OF THIS EQUIPMENT ARE DANGEROUS TO HUMAN LIFE! This instruction manual has been written for the general guidance and information of operation, maintenance and service personnel who are aware of, and are familiar with, the hazards of working with high powered electronic circuits.
MX Series - 20 Watt UHF AMPLIFIER TSM 20-311 rev 0: December 1, 1999 5 20 W UHF Amplifier
MX Series - 20 Watt UHF AMPLIFIER HEALTH WARNINGS: 1. Non-metallic coverings of some coaxial cables used in this equipment are FLAMMABLE and may transmit fire when ignited. Other wire coverings are not capable of supporting combustion, but any non-metallic covering when heated sufficiently may emit dense smoke and acid gases which can be highly TOXIC and often CORROSIVE. 2. Be careful when replacing RF power transistors.
MX Series - 20 Watt UHF AMPLIFIER 2. GENERAL SERVICE INFORMATION Interpreting LARCAN Drawing Numbers (continued). Other assemblies may be shown as a number of separate assemblies (Parts 1, 2, 3, 4, or 5), on several sheets of a single drawing. The drawing "parts" all are assembled the same way, but vary in quantity and type of components. For vendor components such as resistors and capacitors, often a generic drawing describing basic specifications, but having many "parts", will be used.
MX Series - 20 Watt UHF AMPLIFIER GENERAL SERVICE INFORMATION 4. List of Assembly Prefixes Prefix 1 Main Amplifier Chassis Assembly Sub-assembly Prefix 2 Heatsink Assembly “ “ 2A1 Front End Module “ “ 2A2 IPA Module “ “ 2A3 PA Module “ “ 5 Metering Board “ “ 7 Directional Coupler Sub-assembly Prefix 3 Power Supply (B+) Sub-assembly Prefix 4 Control Board Sub-assembly Prefix 8 Control Power Supply 5.
MX Series - 20 Watt UHF AMPLIFIER GENERAL DESCRIPTION INTRODUCTION This manual describes the LARCAN 20 watt UHF amplifier which is designed to operate on channels 14 through 69. This solid state 20 W UHF amplifier was designed to operate conservatively at 20W peak sync visual RF power, and 2W average aural carrier RF power, with superb performance, reliability and operating economy.
MX Series - 20 Watt UHF AMPLIFIER GENERAL DESCRIPTION ELECTRICAL AND MECHANICAL SPECIFICATIONS NTSC Power Output: .................................................................................................... Visual 20 W peak, Aural 2W Diplexing: ........................................................................................................................ internal, 10:1 V to A Frequency Range: .................................................................................
MX Series - 20 Watt UHF AMPLIFIER GENERAL DESCRIPTION ABOUT THIS MANUAL It will be observed that this manual consists of a collection of separate publications, each one of which describes its own module or section of the equipment. Parts lists, applicable alignment instructions, and illustrations which generally consist of assembly diagrams and schematics are included in each of these booklets, which are identified by a "PUB" number and revision.
MX Series - 20 Watt UHF AMPLIFIER GENERAL DESCRIPTION Notes: TSM 20-311 rev 0: December 1, 1999 12 20 W UHF Amplifier
