50kW AM BROADCAST TRANSMITTER XL60

Page 9-1 15 December 1999

SECTION 9 ELECTRICAL SCHEMATICS INTRODUCTION 9.1 This section contains electrical schematics/ logic diagrams for the subject equipment. Block diagrams, simplified electrical schematics and/or logic diagrams may be included. Refer to table 9-1 for an itemized listing. COMPONENT VALUES 9.2 Unless otherwise specified on the logic/ schematic diagram: - Resistor values are shown in ohms. (K = 1 000 and M = 1 000 000). - Capacitor values are shown in microfarads (uF). - Unidentified diodes are part number 1N4938. GRAPHIC SYMBOLS 9.3 The graphic symbols used on electrical schematics are in accordance with American National Standard ANSI Y32.2-1975 - Graphic Symbols for Electrical and Electronic Diagrams. LOGIC SYMBOLS 9.4 The logic symbols used on electrical schematics and logic diagrams are in accordance with American National Standard ANSI Y32-14 - 1975 -Graphic Symbols for Logic Diagrams. REFERENCE DESIGNATIONS 9.5 Reference designations were assigned in accordance with American National Standard ANSI Y32.-16-1975 - Reference Designations for Electrical and Electronic Parts and Equipments. Each electrical symbol has been identified with its basic reference designation. To obtain the full reference designation for a specific part, this basic identifier must be prefixed with the reference designation assigned to all higher assemblies.

UNIQUE SYMBOLOGY 9.6 Nautel utilizes unique symbology on electrical schematics to describe two-state (logic) inputs/outputs which differ from those inputs/ outputs having only one distinct state or multiple states (analog). 9.6.1 TYPE OF INPUTS/OUTPUTS: On electrical schematics, names used to describe two-state (logic) inputs/outputs are prefixed by a '#'. Those inputs/outputs representing a one-state or analog signal will have no prefix. 9.6.2 LOGIC LEVEL/CONVENTION: The '#' prefix identifies an input/output that has two distinct states - 'high' and 'low'. A suffix, '+' or '-', identifies the active (true) state of the input/output. The 'high' (+) will be the more positive of the two levels used to represent the logic states. The 'low' (-) will be the less positive of the two levels used to represent the logic states. Two types of logic, positive and negative, may be represented on a particular schematic. In positive logic, a 'high' represents the active (true) state and a 'low' represents the inactive (false) state. In negative logic, a 'low' represents the active state and a 'high' represents the inactive state. IDENTIFICATION OF SCHEMATIC DIAGRAMS 9.7 Each illustration in this section is identified by a number that is both the figure number and the page number. The numbers are assigned sequentially and are prefixed by the letters 'SD-'. The electrical schematics/logic diagrams included in this section are listed in table 9-1. STRUCTURE OF SCHEMATICS 9.8 The electrical schematics have been structured in a hierarchical format that is based on function and signal flow. Wherever practical, the signal flow is from left to right. Inputs will normally originate on the left-hand side and outputs will be extended to the right-hand side. Exceptions will be indicated by an arrow indicating the direction of signal flow.

50kW AM BROADCAST TRANSMITTER XL60

Page 9-2 15 December 1999

NOTE The physical location of a part/assembly was not necessarily a factor when a schematic was drawn. The full reference designation assigned to a part/ assembly, in conjunction with the family tree in figure 7-1 and the assembly detail drawings in the Mechanical Drawing section (10), will identify its location. 9.8.1 Figure SD-1 identifies the major functional blocks and their detailed interconnection. Figures SD-2 thru SD-16 further expand the functional breakdown of each block and contain cross references that identify which block is the signal source for inputs or the destination for outputs. 9.8.2 When a sub-function is treated as a block in figures SD-2, SD-3, SD-5, SD-6, SD-7 and SD-11, its detailed circuit information will be included in its own schematic drawing(s). These schematics may be included in this section or in an appended service instruction manual(s). LOCATING THE SCHEMATIC DIAGRAM(S) FOR A FUNCTIONAL BLOCK 9.9 The text inside a functional block, provides the key to locating its schematic diagram(s). 9.9.1 WHEN FIGURE NUMBER IDENTIFIED: In some instances the figure number of the schematic will be identified. These schematics will be included in this section. 9.9.2 WHEN REFERENCE DESIGNATION ASSIGNED TO BLOCK: When a functional block has been assigned a reference designation, enter the family tree depicted in figure 7-1 and follow the family tree branches to the block that contains the reference designation. 9.9.2.1 If the family tree's block references a service instruction manual that is keyed to a Nautel nomenclature number, the schematic will be included in the referenced manual. 9.9.2.2 If the family tree's block references a table in the parts list section of this manual, the schematic will be in this section. Enter table 9-1 with the Nautel nomenclature number and/or the description to identify the figure number(s).

9.9.3 TITLE OF BLOCK: When a functional block has not been assigned a reference designation and a figure number has not been referenced, the schematic is included in this section. Enter table 9-1 with the name of the functional block to identify the appropriate figure number(s). LOCATING A PART/ASSEMBLY IDENTIFIED ON A SCHEMATIC 9.10 The full reference designation assigned to a part/assembly is the key to physically locating that part/assembly.

NOTE Full reference designations contain the assembly hierarchical coding. When the end item is divided into units (cabinets) the first coding is a unit number (1, 2, 3, etc). When the end item is divided into assemblies, the first coding is an assembly number (A1, A2, A3, etc). If a unit or an assembly is divided into sub-assemblies, assembly codings that identify assembly relationship (1A1, A2A1, A2A1A1, etc) are added. 9.10.1 Enter the family tree depicted in figure 7-1 with the full reference designation and follow the family tree branches to the appropriate block, noting the name and Nautel nomenclature number of all higher assemblies in the path. NOTE Drawings in the mechanical drawing section (10) depict the assembly detail of the transmitter and any of its modules/ assemblies that are not the subject of their own service instruction manual. If the block in the family tree references a manual that is keyed to a Nautel nomenclature number, the assembly detail for that assembly will be included in the referenced service instruction manual. 9.10.2 Enter table 10-1 with the name and Nautel nomenclature number of each family tree block in the path, starting at the highest assembly (normally figure MD-1) and determine the figure number(s) for that assembly. Refer to the referenced figure and locate the next lower level assembly. Repeat this procedure until the location of the required part/assembly has been identified.

50kW AM BROADCAST TRANSMITTER XL60

Page 9-3 15 December 1999

Table 9-1 List of Electrical Schematics Figure SD-1 Electrical Schematic - XL60 - 50kW AM Broadcast Transmitter

Figure SD-2 Electrical Schematic - 50kW Control/Monitor Functions

Figure SD-3 Electrical Schematic - 50kW Exciter Stage

Figure SD-4 Electrical Schematic - 50kW Rf Drive Stage

Figure SD-5 Electrical Schematic - 50kW Rf Power Stage

Figure SD-6 Electrical Schematic - 50kW Rf Power Block

Figure SD-7A Electrical Schematic - 50kW Ac/Dc Power Stage (Sheet 1 of 2)

Figure SD-7B Electrical Schematic - 50kW Ac/Dc Power Stage (Sheet 2 of 2)

Figure SD-8 Electrical Schematic - Remote Interface Pwb (NAPI25A)

Figure SD-9 Electrical Schematic - Exciter Interface Pwb (NAPI22E)

Figure SD-10 Electrical Schematic - Distribution Pwb (NAPI38D)

Figure SD-11 Electrical Schematic - Dc Power Supply (NASL02B)

Figure SD-12 Electrical Schematic - +48V Voltage Regulator Pwb (NAPS13)

Figure SD-13 Electrical Schematic - Rf Drive Dc Power Supply (NAPS08F)

Figure SD-14 Electrical Schematic - Power Supply Control Pwb (NAPS14E)

Figure SD-15 Electrical Schematic - Rf Combiner/Output Filter (NAF85/NAF86 with NAFP78B)

Figure SD-16 Electrical Schematic - Rf Power Module Interface Pwb (NAPI42C)

Figure SD-17 Electrical Schematic - Surge Arrestor Assembly (NAX202/03)

Figure SD-1 Electrical Schematic – XL60 - 50kW AM Broadcast Transmitter Page SD-1 15 December 1999

Figure SD-2 Electrical Schematic - 50kW Control/Monitor Functions Page SD-2 15 December 1999

Figure SD-3 Electrical Schematic - 50kW Exciter Stage Page SD-3 15 December 1999

Figure SD-4 Electrical Schematic - 50kW RF Drive Stage Page SD-4 29 September 2000

Figure SD-5 Electrical Schematic - 50kW RF Power Stage Page SD-5 29 September 2000

Figure SD-6 Electrical Schematic - 50kW RF Power Block Page SD-6 29 September 2000

Figure SD-7A Electrical Schematic - 50kW AC/DC Power Stage (Sheet 1 of 2) Page SD-7A 29 September 2000

Figure SD-7B Electrical Schematic - 50kW AC/DC Power Stage (Sheet 2 of 2) Page SD-7B 01 June 2003

Figure SD-8 Electrical Schematic - Remote Interface PWB (NAPI25A) Page SD-8 15 December 1999

Figure SD-9 Electrical Schematic - Exciter Interface PWB (NAPI22E) Page SD-9 15 February 2001

Figure SD-10 Electrical Schematic - Distribution PWB (NAPI38D) Page SD-10 15 February 2001

Figure SD-11 Electrical Schematic - DC Power Supply (NASL02B) Page SD-11 15 December 1999

Figure SD-12 Electrical Schematic - +48V Voltage Regulator PWB (NAPS13) Page SD-12 15 December 1999

Figure SD-13 Electrical Schematic - RF Drive DC Power Supply (NAPS08F) Page SD-13 15 January 1998

Figure SD-14 Electrical Schematic - Power Supply Control PWB (NAPS14F) Page SD-14 24 November 2004

Figure SD-15 Electrical Schematic - RF Combiner/Output Filter (NAF85F/NAF86C with NAFP78C) Page SD-15 24 November 2004

Figure SD-16 Electrical Schematic - RF Power Module Interface PWB (NAPI42C) Page SD-16 26 November 2002

Figure SD-17 - Electrical Schematic - Surge Arrestor Assembly (NAX202/03) Page SD-17 29 September 2000