L3 FA5000 - Page 125

COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 229
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
Audio I/P Audio I/P
Tone Test 1
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
B012
− Ana-
log
Audio
Tone
Test 2
Audio I/P Audio I/P
Tone Test 2
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 2
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
B013
− Ana-
log
Audio
Tone
Test 3
Audio I/P Audio I/P
Tone Test 3
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 3
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 3
Audio I/P Audio I/P
Tone Test 4
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 229
Mar. 21/14
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