L3 FA5000 - Page 123

COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 227
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 Ch
1 is shorted
No Audio to
Ch 1
Ch 1 is unable
to record audio
Ch 1 is unable to record audio
B010
− Ana-
log
Audio
Input 2
Audio I/P Audio I/P Ch
2 is open
No Audio to
Ch 2
Ch 2 is unable
to record audio
Ch 2 is unable to record audio
Audio I/P Audio I/P Ch
1 is shorted
No Audio to
Ch 2
Ch 2 is unable
to record audio
Ch 2 is unable to record audio
B011 −
Ana-
log
Audio
Input 3
Audio I/P Audio I/P Ch
3 is open
No Audio to
Ch 3
Ch 3 is unable
to record audio
Ch 3 is unable to record audio
Audio I/P Audio I/P Ch
3 is shorted
No Audio to
Ch 3
Ch 3 is unable
to record audio
Ch 3 is unable to record audio
B012
− Ana-
log
Audio
Input 4
Audio I/P Audio I/P Ch
4 is open
No Audio to
Ch 4
Ch 4 is unable
to record audio
Ch 4 is unable to record audio
Audio I/P Audio I/P Ch
4 is shorted
No Audio to
Ch 4
Ch 4 is unable
to record audio
Ch 4 is unable to record audio
B013
− Ana-
log
Audio
Tone
Test 0
Audio I/P Audio I/P
Tone Test 0
is open
Audio CODEC
is unable to re-
ceive/record
audio tone test
from the DSP
No audio tone
test is per-
formed
No Effect
Audio I/P Audio I/P
Tone Test 0
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
B014
− Ana-
log
Audio
Tone
Test 1
Audio I/P Audio I/P
Tone Test 1
is open
Audio CODEC
is unable to re-
ceive/record
audio tone test
from the DSP
No audio tone
test is per-
formed
No Effect
Rev.04 Page 227
Mar. 21/14
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