COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 130
July 21/17
Testing & Fault Isolation
23–70
−
30
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the restrictions on the cover page of this document.
7.
AIRCRAFT INTERFACE
Table 102. Aircraft Interface Troubleshooting Chart
Pin
ID
Signal Type
Signal Function
Failure Mode
Local Effect
End Effect
01
Power O/P
115_VAC_Out_Hot
(Not Used) (AC_ Re-
turn_In_757A)
The signal path
is open
Loss of 115 VAC (No
Power)
Loss of FA5000 function-
ality
01
Power O/P
115_VAC_Out_Hot
(Not Used) (AC_ Re-
turn_In_757A)
The signal path
is shorted
Degraded EMI/De-
graded Performance
Degraded EMI/Degraded
Performance
02
Power I/P
115 VAC Power Input
(Hot)
The signal path
is open
Loss of 115 VAC (No
Power)
Loss of FA5000 function-
ality
02
Power I/P
115 VAC Power Input
(Hot)
The signal path
is shorted
Loss of 115 VAC (No
Power)
Loss of FA5000 function-
ality
03
Power Rtn
AC Or DC Power Re-
turn
The signal path
is open
Loss of AC or DC
Power
Loss of FA5000 function-
ality
03
Power Rtn
AC Or DC Power Re-
turn
The signal path
is shorted
Degraded EMI/De-
graded Performance
Degraded EMI/Degraded
Performance
04
Power I/P
Indicator Power Input
The signal path
is open
Loss of Indicator
Power
Loss of power input to
the CVDR
04
Power I/P
Indicator Power Input
The signal path
is shorted
Loss of Indicator
Power
Loss of power input to
the CVDR
05
Audio O/P
(
−
)
Audio Monitor Output
(Low)
The signal path
is open
No audio (voice) is
present
Unable to monitor audio
05
Audio O/P
(
−
)
Audio Monitor Output
(Low)
The signal path
is shorted
No audio (voice) is
present
Unable to monitor audio
06
Audio O/P
)
Audio Monitor Output
(High)
The signal path
is open
No audio (voice) is
present
Unable to monitor audio
06
Audio O/P
)
Audio Monitor Output
(High)
The signal path
is shorted
No audio (voice) is
present
Unable to monitor audio
07
Discrete/
Ground
Record Enable (B)
The signal path
is open
Record Enable B
Signal not grounded
Audio is not recorded;
partial loss of CVDR
functionality
07
Discrete/
Ground
Record Enable (B)
The signal path
is shorted
No Effect
No Effect
08
Discrete I/P
Record Enable (A)
The signal path
is open
Record Enable A
Signal not grounded
Audio is not recorded
08
Discrete I/P
Record Enable (A)
The signal path
is shorted
Loss of ability to dis-
able recording
The recorder continu-
ously records
09
Power
28 VDC Power Input
(Hot)
The signal path
is open
Loss of Pos 28 VDC
Loss of CVDR functional-
ity
09
Power
28 VDC Power Input
(Hot)
The signal path
is shorted
Loss of Pos 28 VDC
Loss of CVDR functional-
ity
10
Discrete I/P
Stop CVR Recording
The signal path
is open
The CVR stays in re-
cord mode
The CVR stays in record
mode
10
Discrete I/P
Stop CVR Recording
The signal path
is shorted
The recorder stops
recording voice after
10 minutes but keeps
recording data
Stops audio recording
function after 10 minutes
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