COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 228
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70−40
Use or disclosure of information on this sheet is subject to
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
Audio I/P Audio I/P
Tone Test 4
is shorted
Audio CODEC
receives/re-
cords either no
audio tone test
or a continu-
ous tone test
from the DSP
No audio tone
test or a con-
tinuous tone
test is per-
formed
No Effect
B018
− Ana-
log
Area
MIC
Audio
HI
Audio I/P HI Analog Area
MIC I/P HI is
open
Inputs Channel
4 and the Area
Microphone
Channel HI
both get pro-
cessed at the
same time
The system is
unable to con-
vert the Area
Microphone in-
terface signal
to differential
format in order
to be compat-
ible with Chan-
nel 4 Audio Mi-
crophone HI in-
put
Loss of Channel 4 Audio Mi-
crophone HI
Audio I/P HI Analog Area
MIC I/P HI is
shorted
Inputs Channel
4 and the Area
Microphone
Channel HI do
not get pro-
cessed at all
The system
does not to
convert the
Area Micro-
phone inter-
face signal to
differential
format in order
to be compat-
ible with Chan-
nel 4 Audio Mi-
crophone HI in-
put
Loss of Channel 4 Audio Mi-
crophone HI
B019
− Ana-
log
Area
MIC
Audio
LO
Audio I/P LO Analog Area
MIC I/P LO is
open
Inputs Channel
4 and the Area
Microphone
Channel LO
both get pro-
cessed at the
same time
The system is
unable to con-
vert the Area
Microphone in-
terface signal
to differential
format in order
to be compat-
ible with Chan-
nel 4 Audio Mi-
crophone LO
input
Loss of Channel 4 Audio Mi-
crophone LO
Audio I/P LO Analog Area
MIC I/P LO is
shorted
Inputs Channel
4 and the Area
Microphone
Channel LO do
not get pro-
cessed at all
No Effect No Effect
Rev.04 Page 228
Mar. 21/14
The document reference is online, please check the correspondence between the online documentation and the printed version.
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