COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 144
July 21/17
Testing & Fault Isolation
23–70
−
30
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Table 104 Main Processor Troubleshooting Chart (Continued)
Item
ID
Function Type
Failure
Mode
Local Effect
Next Effect
End Effect
B013
−
Analog
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 continuous
tone test from
the DSP
No audio tone
test or a con-
tinuous tone
test is per-
formed
No Effect
B014
−
Analog
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
Audio I/P
Audio I/P
Tone Test 4
is shorted
Audio CODEC
receives/re-
cords either no
audio tone test
or a continuous
tone test from
the DSP
No audio tone
test or a con-
tinuous tone
test is per-
formed
No Effect
B018
−
Analog
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 interface
signal to differ-
ential format in
order to be
compatible with
Channel 4 Au-
dio Microphone
HI input
Loss of Channel 4 Audio Mi-
crophone HI
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