____________________________________________________________________
Cirrus Perspective™ Line Maintenance Manual
Page 5-67
190-00920-00
Rev.
E
COM1
PTT
–
COM1
push
‐
to
‐
talk
key
is
stuck.
The
COM1
external
push
‐
to
‐
talk
(PTT)
switch
is
stuck
in
the
enabled
(or
“pressed”)
state.
•
Press
the
push
‐
to
‐
talk
switch(s)
again
to
cycle
its
operation.
•
Check
push
‐
to
‐
talk
switch(s)
and
wiring.
•
Switch
GIA1
and
GIA2,
to
verify
location
of
problem:
−
If
problem
follows
the
unit,
replace
GIA1.
•
Check
GIA1/GMA
347
interconnect.
•
Replace
GMA
347.
COM2
PTT
–
COM2
push
‐
to
‐
talk
key
is
stuck.
The
COM2
external
push
‐
to
‐
talk
(PTT)
switch
is
stuck
in
the
enabled
(or
“pressed”)
state.
•
Press
the
push
‐
to
‐
talk
switch(s)
again
to
cycle
its
operation.
•
Check
push
‐
to
‐
talk
switch(s)
and
wiring.
•
Switch
GIA2
and
GIA1,
to
verify
location
of
problem:
−
If
problem
follows
the
unit,
replace
GIA2.
•
Check
GIA1/GMA
347
interconnect.
•
Replace
GMA
347.
COM1
TEMP
–
COM1
over
temp.
Reducing
transmitter
power.
The
system
has
detected
an
over
temperature
in
COM1.
•
Check
fan,
wiring
and
air
tubing
for
proper
operation
(if
applicable).
•
Replace
cooling
fan
if
unable
to
determine
if
operating
correctly.
•
Replace
GIA1.
COM2
TEMP
–
COM2
over
temp.
Reducing
transmitter
power.
The
system
has
detected
an
over
temperature
in
COM2.
•
Check
fan,
wiring
and
air
tubing
for
proper
operation
(if
applicable).
•
Replace
cooling
fan
if
unable
to
determine
if
operating
correctly.
•
Replace
GIA2.
NOTE
COM
1
and
COM
2
remain
operable
in
an
over
‐
temperature
condition
with
reduced
transmit
power.
Summary of Contents for Cirrus Perspective SR20
Page 2: ......
