COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 144
July 21/17
Testing & Fault Isolation
23–70−30
Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
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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