COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 175
Apr. 14/16
Testing & Fault Isolation
23–70–04
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
Table 105. FA2100 CVR Fault Code Corrective Actions (Continued)
Fault Code
Failure Mode
Corrective Action
6902
Negative 5 volt power
supply failure.
see previous page
6903
12 volt (VPP) power
supply failure
51d9
An underflow occurred in
the TDM high priority
queue.
1) Remove and replace Acquisition Processor PWA,
PN: 205E3977-XX‐( ).
2) Run autotest & recheck recorder status.
3) If fault codes still present in status report, then
return the recorder to factory for repair.
51d9, 85da,
d9c6, 89d7
TDM Hi
−
Priority
Underflow, TDM AC RX
Overflow, CVR Audio
Packet Timeout, CVR Bad
Indices, Audio Packet
Shutdown Timeout.
1) Remove and replace Audio Compressor PWA,
PN: 205E3977‐( ).
2) Run autotest & recheck recorder status.
3) If fault codes still present in status report, then
return the recorder to factory for repair.
59db
System Error: CVR test
failed. Test tone failed
1) Remove and replace Audio Compressor PWA,
PN: 205E3977‐( ).
2) Run autotest & recheck recorder status.
3) If fault codes still present in status report, then
return the recorder to factory for repair.
85da, 51d9,
0855, 6900
85da: An overflow
occurred in the audio
channelizer receive buffer.
51d9: An underflow
occurred in the TDM high
priority queue.
0855: A CVR flash
memory read
−
after
−
write
error occurred.
6900: 18 volt power
supply failed.
1) Remove and replace Acquisition Processor PWA,
PN: 205E2502‐( ).
2) Run autotest & recheck recorder status.
3) If fault codes still present in status report, then
return the recorder to factory for repair.
85da
An overflow occurred in
the audio channelizer
receive buffer.
1) Remove and replace CSMU, p/n: 253E3977‐( ).
2) Run autotest & recheck recorder status.
3) If fault codes still present in status report, then
return the recorder to factory for repair.
The document reference is online, please check the correspondence between the online documentation and the printed version.
