GTX 327 MAINTENANCE MANUAL
Page 5-1
190-00187-05
Rev. B
SECTION 5
TESTING
5.1
INTRODUCTION
The test procedures in this section are provided to aid the technician in locating faulty assemblies within the unit.
The test procedures can be performed before troubleshooting is started or they can be used as a “return to
service” test after replacement of assemblies has been made. All tests can be performed without accessing the
inside of the unit.
The GTX 327 Transponder contains static sensitive components. Observe
proper anti-static procedures when testing the unit.
WARNING
Hazardous voltages exist on the Main Board and Transmitter Board. Under
normal operating conditions the voltages range up to 60 Vdc. Exercise
extreme caution during unit testing. Death or serious injury could result from
electrical shock.
5.2
GENERAL
Included in this section are the test equipment required, test setup data and testing procedures for units removed
from an aircraft or from storage before use in an aircraft. Perform these tests with the dust covers on. After
failure of a specific test the unit may be returned to the factory for repair or opened for further testing and
troubleshooting. Repair is limited to replacement of field replaceable assemblies listed in Section 1, paragraph
1.5.
After completing all necessary maintenance or service, perform the tests in this section, Section 5, TESTING, to
ensure that all functions are operating properly.
5.3
ADJUSTMENT/MEASUREMENT ACCURACY
Before making any adjustments to the unit, ensure that all test equipment is in calibration and traceable to NIST
(National Institute of Standards and Technology). Some output parameters are factory adjusted to specific levels.
Test levels may not be accurate if the unit has been readjusted in the field.
The document reference is online, please check the correspondence between the online documentation and the printed version.
