COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Page 18
Nov. 01/98
Description and Operation
23–70–04
In the GACVR, a continuous Bite Status Output or Recorder Fault is indicated on pin
23. A ground at pin 23 represents a no fault, while an open indicates a fault or that
a CVR is not installed. The CVR test indicator wires, pins 15 and 16 (1mA) may be
omitted in installations where ARINC 557 compatibility is not needed.
23
+V
CVR
RELAY
ENERGIZE = OPEN (NO CVR FAULT)
DE-ENGERIZED = GRN (CVR FAULT)
CVR FAULT LIGHT
ANNUNCIATOR
PANEL
REAL TIME
OPEN = FAULT
GND = NO FAULT
Figure 7.
GACVR Fault Circuit for Pin 23
K. Crash Survivable Memory Unit
The Crash Survivable Memory Unit (CSMU) is the environmentally hardened
memory storage assembly of the Model FA2100. Electrical interface to the CSMU is
made by the Acquisition Processor PWA via a single 16-contact connector at con-
nector J1.
L. Crash and Fire Protection
The Crash Survivable Memory Unit (CSMU) construction enables the Model
FA2100CVR to meet or exceed the rigorous crash protection requirements of
EUROCAE ED–56A, ED−112 and TSO-123a.
M. Control Unit, Microphone & Preamplifier Equipment
Refer to Aviation Recorders ED-56A Compliant Control Unit, Preamplifier and Micro-
phone CMM, ATA No. 23-70-05, Part Number 165E1747-00, for more detailed infor-
mation of these ancillary recorder components.
May 01/0
Rev. 06 Page 18
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