COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 234
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70−40
Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
Table 206. CSMU Troubleshooting Chart
Item ID Function Type Failure Mode Local Effect Next Effect End Effect
0001A −
FPGA
Watch Dog Timer;
CSMU Interface;
Rx/Tx; writes to
NVSDRAM; Bad
Block Manage-
ment; Wear Level-
ing; Data Verifica-
tion
Over/Under
Voltage
The FPGA does not
operate properly: It
does not initialize
some command ex-
ecutions
The CVDR
does not oper-
ate properly
The CVDR does not operate
properly: Some data may be
corrupt and may not be re-
corded, stored or copied
Watch Dog Timer;
CSMU Interface;
Rx/Tx; writes to
NVSDRAM; Bad
Block Manage-
ment; Wear Level-
ing; Data Verifica-
tion
Incorrect O/P The FPGA does not
operate properly: It
does not initialize
some command ex-
ecutions
The CVDR
does not oper-
ate properly
The CVDR does not operate
properly: Some data may be
corrupt and may not be re-
corded, stored or copied
Watch Dog Timer;
CSMU Interface;
Rx/Tx; writes to
NVSDRAM; Bad
Block Manage-
ment; Wear Level-
ing; Data Verifica-
tion
Single Event
Upset (SEU)
The FPGA initially
does not operate: It
is in an undeter-
mined condition
The MP PWA
initially does not
operate
The CVDR initially does not
operate: Some data may be
corrupt, lost and/or may not
be recorded, stored or
copied NOTE: The corrup-
ted FPGA is erased and re-
placed
0002A −
SDRAM
Non−Volatile
Memory
Loss of Power All memory is lost:
The SRAM is unable
to execute the sys-
tem’s program
The CSMU fails
to operate
The CVDR fails to operate
Non−Volatile
Memory
Over/Under
Voltage
All memory is lost:
The SRAM is unable
to execute the sys-
tem’s program
The CSMU fails
to operate
The CVDR fails to operate
Non−Volatile
Memory
Electrical In-
terference
Software glitch flips
data bits, causing
data corruption such
as lost, missing or
scrambled data
The CSMU
does not oper-
ate properly:
Some data may
be corrupt and
may not be
copied
The CVDR initially does not
operate: Some data may be
corrupt, lost and/or may not
be recorded, stored or
copied NOTE: The
SDRAM resets and is able
to copy data
0003A −
Flash
Memory
Non−Volatile
Memory
Loss of Power The Flash Memory
fails: unable to store
data and the
SDRAM is unable to
copy data
The CSMU fails
to operate prop-
erly
The CVDR does not operate
properly: Some data may be
corrupt and may not be re-
corded, stored or copied
Rev.04 Page 234
Mar. 21/14
The document reference is online, please check the correspondence between the online documentation and the printed version.
To Next Page
Loading...
Need help?
General
