____________________________________________________________________
Cirrus Perspective™ Line Maintenance Manual
Page 5-97
190-00920-00
Rev.
E
Servo
Faults
and
Troubleshooting
A
status
message
is
logged
to
the
corresponding
servo
control
or
maintenance
log
whenever
a
servo
fault
occurs.
This
information
is
also
accompanied
by
a
time
and
date
stamp.
An
“RTC
DATE”
entry
is
made
every
time
a
servo
is
powered
on,
and
is
normally
not
useful
for
troubleshooting.
The
following
is
a
listing
of
possible
faults
that
could
be
reported
in
a
GSA
fault
log.
Faults
can
occur
in
the
monitor
board
processor
or
the
control
board
processor,
both
of
which
are
contained
in
the
GSA.
Monitor
Processor
The
monitor
processor
contains
the
logs
that
are
found
in
the
following
processors:
2
–
Pitch
Servo
4
–
Roll
Servo
6
–
Yaw
Servo
8
–
Pitch
Trim
Servo
There
are
two
main
groupings
of
faults
that
can
occur
in
the
monitor
processor:
The
first
grouping
of
faults
can
occur
during
the
GSA
unit
pre
‐
flight
test
(PFT).
If
there
is
a
fault
during
PFT,
the
unit
will
not
be
able
to
transition
to
normal
mode
and
the
only
way
to
clear
this
state
is
to
cycle
unit
power.
The
second
grouping
of
faults
can
occur
during
normal
mode.
These
faults
generally
cause
a
disconnect
of
power
to
the
GSA
and
report
that
a
fault
has
occurred
to
the
GIA.
The
notes
column
indicates
any
actions
that
can
be
taken
to
troubleshoot
the
problem
in
the
aircraft
by
the
technician.
Any
faults
that
are
not
listed
here
indicate
an
internal
problem
requiring
replacement
of
the
servo.
If
the
items
in
the
notes
column
check
out
ok,
replace
the
servo.
PFT
Faults
MONITOR
PFT
STEP
NOTES
"INTERNAL
COMM
FAIL"
This
can
be
a
result
of
a
failure
on
the
other
internal
servo
board,
check
faults
on
the
other
processor
"UNSW
POWER
INV"
Check
unit
power
"MON
SOL
PWR
ON
FAIL"
Check
unit
power
and
AP
Disconnect
power
"CTL
SOL
PWR
ON
FAIL"
Check
unit
power
and
AP
Disconnect
power
"SOL
PWR
FAIL"
Check
unit
power
and
AP
Disconnect
power
"CERT
DATA
UNINSTALLED"
Upload
the
certification
gain
file
to
the
monitor
board
"STRAP
CODE
MISMATCH"
Check
the
connector
strap
inputs
to
the
unit
Summary of Contents for Cirrus Perspective SR20
Page 2: ......
