COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 230
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70
−
40
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the restrictions on the cover page of this document.
Table 205. Main Processor Troubleshooting Chart (Continued)
Item
ID
Function Type
Failure
Mode
Local Effect
Next Effect
End Effect
E020
−
CAM
and
Pre
Amp
Power
Audio I/P
−
Power
The CAM
and Pre Amp
Power are
open
The power is
note available
to the Cockpit
Area Micro-
phone or the
Preamplifier
Power
Loss of Cockpit
Area Micro-
phone &
Preamplifier
Power
Loss of Cockpit Area Micro-
phone & Preamplifier Power
Audio I/P
−
Power
The CAM
and Pre Amp
Power are
shorted
The output
voltage is not
disrupted and
the system
/FPGA/DAP
software is not
alerted
The system
software is un-
able to disrupt
this output via
control pin from
the FPGA
Loss of Cockpit Area Micro-
phone & Preamplifier Power
F021
−
Ana-
log
Audio
Monit-
or O/P
Ch HI
Audio O/P HI
The Analog
Audio Monit-
or O/P Ch HI
is open
The high out-
put is not
scaled up by
the output
stage and
does not pass
through the
output trans-
former
The Analog
Audio Monitor
Output Chan-
nel HI does not
function
Loss of the Analog Audio Mon-
itor Output Channel HI
Audio O/P HI
The Analog
Audio Monit-
or O/P Ch HI
is shorted
The high out-
put is not
scaled up by
the output
stage and
does not pass
through the
output trans-
former
The Analog
Audio Monitor
Output Chan-
nel HI does not
function
Loss of the Analog Audio Mon-
itor Output Channel HI
F022
−
Ana-
log
Audio
Monit-
or O/P
Ch LO
Audio O/P LO
The Analog
Audio Monit-
or O/P Ch
LO is open
The high out-
put is not
scaled up by
the output
stage and
does not pass
through the
output trans-
former
The Analog
Audio Monitor
Output Chan-
nel LO does
not function
Loss of the Analog Audio Mon-
itor Output Channel LO
Audio O/P LO
The Analog
Audio Monit-
or O/P Ch
LO is shor-
ted
The high out-
put is not
scaled up by
the output
stage and
does not pass
through the
output trans-
former
The Analog
Audio Monitor
Output Chan-
nel LO does
not function
Loss of the Analog Audio Mon-
itor Output Channel LO
Rev.04 Page 230
Mar. 21/14
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