50kW AM BROADCAST TRANSMITTER
XL60
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.
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).
COMPONENT VALUES
9.2
Unless otherwise specified on the logic/
schematic diagram:
9.6.1
TYPE OF INPUTS/OUTPUTS: On
electrical schematics, names used to describe twostate (logic) inputs/outputs are prefixed by a '#'.
Those inputs/outputs representing a one-state or
analog signal will have no prefix.
- 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.
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.
Page 9-1
15 December 1999
50kW AM BROADCAST TRANSMITTER
XL60
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.
Page 9-2
15 December 1999
50kW AM BROADCAST TRANSMITTER
XL60
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)
Page 9-3
15 December 1999
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