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 2 of 13
April 2012
Table of Contents
1
Introduction ............................................................................................................................. 3
1.1
General Description ......................................................................................................... 3
1.2
Detailed Description..................................................................................................... 3
1.2.1
Main Board Assembly .............................................................................................. 4
1.2.1.1
Microcontroller ........................................................................................................ 4
1.2.1.2
Power Supply Circuits .............................................................................................. 5
1.2.1.3
Modulation Control.................................................................................................. 5
1.2.1.4
RF TX Generator ....................................................................................................... 6
1.2.2
Transmitter Board.................................................................................................... 7
2
Troubleshooting....................................................................................................................... 8
2.1
Troubleshooting Equipment Required............................................................................. 8
2.2
Initial Troubleshooting Operations .................................................................................. 8
2.3
Power Supply Check......................................................................................................... 8
3
Disassembly Instructions ......................................................................................................... 9
3.1
Removal of the Covers ..................................................................................................... 9
3.2
Board and Module Disassembly ...................................................................................... 9
3.2.1
Main Board Removal........................................................................................................ 9
3.2.4
Transmitter Board Removal ............................................................................................. 9
3.3
Reassembling the Unit ...................................................................................................10
4
Service and Testing ................................................................................................................10
4.1
Initial Alignment / Return to Service..............................................................................10
4.1.1
Test Equipment Required ......................................................................................10
4.1.2
Setup ......................................................................................................................10
5
Appendix ................................................................................................................................13
5.1
Table of Parts .................................................................................................................13
5.2
Specifications .................................................................................................................13
