COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 35
July 21/17
Description and Operation
23–70
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30
Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
Notes for Figure 18:
1.
Recommended minimum wire size is #22; however, wire size #24 is electrically permissible
except for long-run power leads where #18 wire is recommended (pins 2, 3, 9, & 17)
.
Wire
resistance should not exceed 1 ohm for power leads and should not exceed 5 ohms for sig-
nal leads. All wiring should be MIL–W–22759 or MIL–C–27500.
2.
Only one power source is to be wired per aircraft. If 115 Vac, 400 Hz is supplied, connection
is to be made to pin 2 & 3. If 28 Vdc is supplied, connection is to be made to pins 9. Short-
ing pins 1 & 2 is optional.
3.
Recorder ground connection to be within 1 foot of pin 17, heavy gauge wire. Shields to be
grounded at the recorder using short connections. Pin 17 is used as +28 VDC return. Control
unit may be grounded in the cockpit to a chassis ground.
4.
Jumper in aircraft connector. Without this jumper, the unit will not record or erase previously
recorded information, bulk erase will not activate, and test will indicate NO-GO.
5.
Pin 3 is not a DC return and is not grounded in the recorder. (see Note 3)
6.
Twisted shielded cable. Shields to be grounded at the airframe using short connections. Tie
shields to existing single point GND use for Pin 17. (see Note 3)
7.
If the power source has battery back-up, a means for terminating recording after a crash
should be included in the aircraft wiring. Grounding pin 10 terminates recording within 10
minutes.
8.
BITE status output: Ground = no fault, Open = fault or CVR not installed.
9.
Audio input .05 Vrms
−
3 Vrms maximum. (1Vrms nominal).
10.
Per FAA Action Notice A8300.56 dated Jan. 24, 1990, the wiring to Channels 1 and 3 may be
transposed; that is, Channel 1 will be Pilot and Channel 3 will be Third Crew Member or PA
System.
11.
Test Ind/
−
lines (pins 15 & 16) only p12 Vdc, 1ma output to illuminate the
Control Unit Test Lamp. (This is not sufficient to light an external Annunciator lamp.)
12.
In all CVR configurations provides both 150 (1 sec resolution) and 125 (0.1 min. resolution)
for 429 GMT inputs.
13.
S055 microphone installations required double shielding. For S056 installations, double
shielding is not required for new installations, however, it may be left in place for retrofit in-
stallations.
The document reference is online, please check the correspondence between the online documentation and the printed version.