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The GTX 327 Transponder contains static sensitive components.
proper anti-static procedures when testing the unit.
Hazardous voltages exist on the main board and transmitter board. Under
normal operating conditions the voltages range up to 60 Vdc.
extreme caution during unit testing. Death or serious injury could result from
electrical shock.
If a spare assembly is available for swap testing, first verify that the unit under
test does not have a faulty condition that would damage the spare assembly.
3.1
TROUBLESHOOTING EQUIPMENT
See Sections 2 and 5 for equipment used in troubleshooting.
3.2
TROUBLESHOOTING THE GTX 327
To effectively troubleshoot a suspected faulty unit, use the information in this section as an aid in troubleshooting
the GTX 327 Transponder to the replaceable assembly level. Proceed with troubleshooting using the following
procedures, circuit board diagrams found at the end of this section and Table 3-3, Testing Failures and
Recommended Actions.
In general, entry into the troubleshooting section occurs after a failure in the testing section. After the faulty
module is isolated and repair is made, the unit should be retested using the functional test procedure in Section 5,
TESTING of this manual to ensure that the repaired area is operating correctly and that other areas have not been
damaged during the repair procedure.
If the unit failed to pass a functional test in an aircraft but passed the bench testing procedure, the fault is
considered to be in the aircraft. Test and troubleshoot the aircraft wiring harness, antenna and antenna cable.
GTX 327 MAINTENANCE MANUAL
190-00187-05
The document reference is online, please check the correspondence between the online documentation and the printed version.
SECTION 3
TROUBLESHOOTING
WARNING
CAUTION
Observe
Exercise
Page 3-1
Rev. B
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