COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 137
July 21/17
Testing & Fault Isolation
23–70−30
Use or disclosure of information on this sheet is subject to
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
The document reference is online, please check the correspondence between the online documentation and the printed version.
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