Garmin GNC 420 Maintenance Manual page 40

TEST FAILURE
Voice/Ident Audio Output Level
Voice/Ident Audio Frequency
Response
Voice/Ident Audio Distortion
VOR AGC
VOR Audio Sensitivity
Receiver Quieting
Ident/Voice Tone Ratio
Harmonic Distortion
VOR Flag Sensitivity
LOC Flag Sensitivity
VOR/LOC Composite Test
VOR Course Deviation
Sensitivity
Localizer Course Deviation
Sensitivity
TO-FROM Indicator
Centering Accuracy
Course Deviation Accuracy Test
VOR OBS Bearing Accuracy
Selectivity
Spurious Response—VOR/LOC
Page 3-14
Rev. C
Table 3-10. Testing Failures NAV Receiver
TEST PARAGRAPH
5.7.3.1
5.7.3.2
5.7.3.3
5.7.3.4
5.7.3.5
5.7.3.6
5.7.3.7
5.7.3.8
5.7.3.9
5.7.3.10
5.7.3.11
5.7.3.12
5.7.3.13
5.7.3.14
5.7.3.15
5.7.3.16
5.7.3.17
5.7.3.18
5.8.5.19
RECOMMENDED ACTION
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
Replace Nav Receiver Board (see paragraph 4.5.6)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05