COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 04 Page 102
Feb. 27/14
Testing & Fault Isolation
23–70
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Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
control circuits; and (3) the Crash Survivable Memory Unit (CSMU), which is used to digi-
tally store and crash protect the cockpit voice communications. When it has been deter-
mined that an assembly is faulty, it should be removed from service, properly packaged,
and returned to L3 Communications, Aviation Recorders for repair or replacement. No
troubleshooting procedure is provided for any of these assemblies. Attempting field repair
on any of these assemblies will void their warranty.
3.
MODEL FA5000CVDR RECORDER IN-SERVICE CHECKOUT
A continuous Built-In-Test (BIT) capability is provided at power up to establish and moni-
tor the mission fitness of the hardware. The built-in-test feature has been designed to
perform a continuous test of all bits within the solid-state memory located in the Crash
Survivable Memory Unit (CSMU). Any faults with the unit are stored in non
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volatile RAM
as a fault history log to aid in troubleshooting.
The Model FA5000CVDR’s built-in-test (BIT) philosophy is in accordance with guidelines
set forth in ARINC Reports 604
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1 and 624. Activating the BIT test is sufficient to deter-
mine the mission readiness of the Model FA5000CVDR Cockpit Voice Recorder System.
This operational test is performed as a pre-flight functional checkout of the Model
FA5000CVDR and is activated using front panel controls on its associated control unit.
Bulk erasure of the Model FA5000CVDR storage medium is accomplished using the
associated control unit red ERASE pushbutton switch. Aircraft wiring interlocks must be
set (that is, landing gear must be down and brakes locked) to allow the CSMU (solid-state
flash memory) to be erased. To erase the information stored in the flash memory, press
the ERASE pushbutton for more than 2 seconds and release. A 400-Hertz tone should
be heard via the headset for less than 10 seconds.
Should a problem be detected with the Model FA5000CVDR and its associated control
unit, remove the units from the aircraft. To determine the fault, place the units on the test
bench for complete testing as listed in the procedures in Paragraph 5.
4.
RECORDER INTERFACE UNIT (RIU)
This section provides instructions for connecting the Recorder Interface Unit to the ROC/7
and FA5000CVDR under test. Refer to Figure 201 for the ROC/7 w/CVDR Automated
Test Station Software (CATS) FA5000CVDR test setup diagram.
CAUTION:Before proceeding, ensure that the power input select switch on the ROC is in
the proper electrical setting: 115 Vac or 230 Vac. If power input select switch is
not in the proper setting, this will cause failure or damage in the units.
A.
READ
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OUT CENTER/7 (ROC/7) Interconnects
CAUTION:Make certain that all power is turned off before attaching cables. Failure to
turn off power before attaching cables will result in immediate and serious
damage to the unit. See Figure 101.
CAUTION:Use only DC input voltage for auto testing.
The document reference is online, please check the correspondence between the online documentation and the printed version.
