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COMPONENT MAINTENANCE MANUAL

AVIATION PRODUCTS

Model FA5000

Rev. 02 Page 145

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

Function Type Failure

Mode

Local Effect Next Effect End Effect

B019 −

Analog

Area

MIC

Audio

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

E020 −

CAM

and

Pre

Amp

Power

Audio I/P − Power The CAM

and Pre Amp

Power are

open

The power is

note available

to the Cockpit

Area Micro-

phone or the

Preamplifier

Power

Loss of Cockpit

Area Micro-

phone &

Preamplifier

Power

Loss of Cockpit Area Micro-

phone & Preamplifier Power

Audio I/P − Power The CAM

and Pre Amp

Power are

shorted

The output

voltage is not

disrupted and

the system

/FPGA/DAP

softeware is

not alerted

The system

softeware is

unable to dis-

rupt this output

via control pin

from the FPGA

Loss of Cockpit Area Micro-

phone & Preamplifier Power

F021 −

Analog

Audio

Monit-

or O/P

Ch HI

Audio O/P HI The Analog

Audio Monit-

or O/P Ch HI

is open

The high out-

put is not

scaled up by

the output

stage and

does not pass

through the

output trans-

former

The Analog Au-

dio Monitor

Output Chan-

nel HI does not

function

Loss of the Analog Audio Mon-

itor Output Channel HI

Audio O/P HI The Analog

Audio Monit-

or O/P Ch HI

is shorted

The high out-

put is not

scaled up by

the output

stage and

does not pass

through the

output trans-

former

The Analog Au-

dio Monitor

Output Chan-

nel HI does not

function

Loss of the Analog Audio Mon-

itor Output Channel HI

The document reference is online, please check the correspondence between the online documentation and the printed version.

Brand	L3
Model	FA5000
Category	Voice Recorder
Language	English

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