COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 137
July 21/17
Testing & Fault Isolation
23–70
−
30
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the restrictions on the cover page of this document.
Table 103 Aircraft Interface Troubleshooting Chart (Continued)
Pin
ID
Signal Type
Signal Function
Failure Mode
Local Effect
End Effect
50
Data Link B
(
−
)
Data Link V1 OMS 429
Output (B)
The signal path
is open
Loss of ability to re-
cord Data Link in-
formation and OMS
signal data
Unable to record ARINC
429 (B) Data Link V1 and
OMS signal data
50
Data Link B
(
−
)
Data Link V1 OMS 429
Output (B)
The signal path
is shorted
Loss of ability to re-
cord Data Link in-
formation and OMS
signal data
Unable to record ARINC
429 (B) Data Link V1 and
OMS signal data
51
Data Link A
(
)
)
Data Link V1 OMS 429
Output (A)
The signal path
is open
Loss of ability to re-
cord Data Link in-
formation and OMS
signal data
Unable to record ARINC
429 (A) Data Link V1 and
OMS signal data
51
Data Link A
(
)
)
Data Link V1 OMS 429
Output (A)
The signal path
is shorted
Loss of ability to re-
cord Data Link in-
formation and OMS
signal data
Unable to record ARINC
429 (A) Data Link V1 and
OMS signal data
52
Power
Area Mic Input Bias
The signal path
is open
Loss of bias to Area
Microphone
Loss of audio from Area
Microphone
52
Power
Area Mic Input Bias
The signal path
is shorted
Loss of bias to Area
Microphone
Loss of audio from Area
Microphone
53
Differential
Audio (
−
)
Area Mic Input Low
The signal path
is open
Audio from the Area
Mic Input Low Signal
is disrupted
Fails to record
−
no audio
is recorded
53
Differential
Audio (
−
)
Area Mic Input Low
The signal path
is shorted
Audio from the Area
Mic Input Low Signal
is degraded due to
interference
Degraded EMI
54
Differential
Audio (
)
)
Area Mic Input High
The signal path
is open
Audio from the Area
Mic Input Hi Signal is
disrupted
Fails to record
−
no audio
is recorded
54
Differential
Audio (
)
)
Area Mic Input High
The signal path
is shorted
Audio from the Area
Mic Input Hi Signal is
disrupted
Fails to record
−
no audio
is recorded
55
Discrete
Voice Erase A
The signal path
is open
Loss of ability to
erase recorded audio
The recorder does not
erase recorded audio
55
Discrete
Voice Erase A
The signal path
is shorted
Loss of ability to
erase recorded audio
The recorder does not
erase recorded audio
56
Discrete
Data Link Valid
The signal path
is open
Data Link Valid signal
data may or not be
valid
Unable to determine if
the Data Link Valid signal
data is not valid or valid
56
Discrete
Data Link Valid
The signal path
is shorted
Data Link Valid signal
data may or not be
valid
Unable to determine if
the Data Link Valid signal
data is not valid or valid
57
Differential
Analog
Voice Erase C Supply
The signal path
is open
Loss of ability to
erase recorded audio
The recorder does not
erase recorded audio
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