VAL AVIONICS LTD
VAL AVIONICS LTD
VAL AVIONICS LTD
VAL AVIONICS LTD
AWOS 2000
AWOS 2000
AWOS 2000
AWOS 2000 –
–
–
– VHF TRANSMITTER
VHF TRANSMITTER
VHF TRANSMITTER
VHF TRANSMITTER
MAINTENCE AND REPAIR MANUAL
MAINTENCE AND REPAIR MANUAL
MAINTENCE AND REPAIR MANUAL
MAINTENCE AND REPAIR MANUAL
Revision 1
Page 3 of 13
April 2012
1
Introduction
This manual is intended to provide instructions and guidelines for the
maintenance and repair of the VAL AWOS 2000.
WARNING:
This unit contains static sensitive devices. Service personnel must
ensure that proper precautions are taken to prevent damage to this equipment
from electrostatic discharge (ESD). Disassembly and repair should only be
accomplished in an approved ESD workstation, and performed by properly
trained and grounded personnel.
1.1 General Description
The AWOS 2000 is a full-featured VHF transmitter designed for fixed remote
installation. The AWOS 2000 uses a two-stage transmitter. The user interface
consists of DIP-switches to control the active frequency and three adjustments
for controlling power, modulation and frequency. The unit case is constructed
from milled aluminum; the boards are constructed using high quality materials
and use the latest techniques in manufacturing technology.
In order to achieve the desired reliability, size, and power requirements, surface
mounted components are used extensively. Specialized equipment and
procedures are required to repair circuit boards having surface mounted
components. Val Avionics LTD. does not authorize the repair of AWOS 2000
circuit boards. All circuit boards and assemblies from the AWOS 2000 can be
economically replaced if necessary.
The following modules and printed circuit board assemblies are available for
replacement:
Main Board:
Printed circuit board, which contains the microcontroller, power supply circuitry,
and audio components.
Transmitter Board:
Contains the two-stage transmitter.
1.2
Detailed Description
Internally the AWOS 2000 is divided into two printed circuit boards: the main
board and transmitter. The block diagram in Figure 1 below shows the
relationships between the major circuits and modules within the AWOS 2000.
