500 WATT RADIOBEACON TRANSMITTER
ND2000A-02x-xx0
Page 6-1
15 October 2004
SECTION 6
MAINTENANCE
GENERAL
6.1
This section contains scheduled and
corrective maintenance information for the subject
transmitter. Fault symptoms should be analyzed to
determine the corrective action required. Normally a
recalibration will resolve the apparent problem. In
any event, the most practical way to isolate a fault is
to perform a functional test in conjunction with the
calibration procedures. This section also contains
wiring data information for each hard wired assembly.
ELECTRICAL SCHEMATICS/ LOGIC
DIAGRAMS
6.2
An electrical schematic for each electrical
assembly in the ND2000A radio beacon transmitter is
provided.
6.2.1
COMPONENT
VALUES:
Unless
otherwise specified on the schematic:
-
All resistor values are shown in ohms (K = 1000
and M = 1 000 000).
-
All capacitor values are shown in microfarads
(uF).
-
Unidentified diodes are part number 1N4938.
6.2.2
GRAPHIC SYMBOLS:
The graphic
symbols used on the electrical schematics are in
accordance with American National Standard ANSI
Y32.2-1975 - Graphic Symbols for Electrical and
Electronic Diagrams.
6.2.3
LOGIC SYMBOLS:
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.
6.2.4
REFERENCE
DESIGNATIONS:
Reference designations have been 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.
WIRING INFORMATION
6.3
Point to point wiring information is
provided in tables 8-1 through 8-12.
6.3.1
TRANSMITTER CABINET WIRING:
Table 8-1 provides a tabular wiring list for the
transmitter cabinet.
6.3.2
CONTROL/
MONITOR
PANEL
WIRING:
Table 8-2 provides a tabular wiring list for
control/monitor panel A1.
6.3.3
MODULATOR/POWER AMPLIFIER
MODULE WIRING:
Table 8-3 provides a tabular
wiring list for modulator/power amplifier modules A2
and A3.
6.3.4
EXCITER MODULE WIRING:
Table
8-4 provides a tabular wiring list for exciter modules
A4 and A5.
6.3.5 POWER ON/OFF PANEL WIRING:
Table 8-5 provides a tabular wiring list for power on/
off panel A6.
6.3.6
POWER SUPPLY MODULE WIRING:
Table 8-6 provides a tabular wiring list for power
supply modules A7 and A8.
6.3.7
B- VDC TO +24 VDC CONVERTER
WIRING:
Table 8-7 provides a tabular wiring list for
B- VDC to +24 VDC converter A7A2 and A8A2.
6.3.8
HARMONIC FILTER ASSEMBLY
WIRING:
Table 8-8 provides a tabular wiring list for
harmonic filter assembly A9.
6.3.9
FWD/REFL
POWER
PROBE
WIRING:
Table 8-9 provides a tabular wiring list for
fwd/refld power probe A9A1.
