Continuous Station Diagnostics - Motorola MSF 5000 Instruction Manual

MSF
5000
Instruction Manual
Chapter2
Operation
Station Diagnostics
Most audio diagnostic
tests are implemented
using closed-circuit
stimulus-response techniques.
A
test
signal is generated on-board and is routed
to
the circuit-under-test. The output of
the
circuit-under-test is then monitored using
the
analog-to-digital converter on
the
MC68HC11
processor or certain
logic
inputs.
All
audio errors are non-fatal.
A
faulty audio circuit does not shut
down
the station, as other station functions
may
be operational. Consequently, graceful
degradation of station performance is
achieved
in
the event of a
marginal or defective audio circuit.
All
audio diagnostic errors are reported
via
the
Control Tray Status display in
the
format of
A.x.x., where
xx is
a
hexadecimal error
code.
If an audio test should fail,
the error code
displays for two
seconds.
During
this brief time,
the service person
may.
freeze the test configuration
by
setting the front panel
Acc Dis/Reset
switch
to
Acc Dis.
The
tests are
suspended
until two
seconds after
Reset is
selected.
Freezing
the audio diagnostic routine after an error is necessary to
set
up
the
proper gating required to find the problem circuit, which may
be
difficult to do
under normal operating conditions.
All
EEPOTs
are
fully
exercised during audio
tests.
They
are
returned to their
.
original settings
as
indicated by
the code
plug.
As
a result,
if
the code
plug values
'
are
not accurate (i.e., the code
plug was recently replaced or tlie station was
reset
during
code
plug
re-programming),
the
EEPOTs
are
not be returned to their
original positions, and station realignment may
be necessary.
Continuous Station Diagnostics
68P81092E06
3/14/94
The continuous
class
of diagnostics always monitors
the status
of
the station. One
part of the continuous diagnostics monitors the software program controlling the
station.
If abnormal operation is encountered, an error code
displays in
the
Control Tray Status display. Refer
to
Appendix
B
-
Error Codes for additional
information.
The
other part of continuous diagnostics operates
by
reading
the
eight reverse
wildcard (RW)
bits on the station
MUXbus.
These bits are on addresses
12
and
13.
If any of
these bits are
active,
a
corresponding number of alarm tones generate.
The alarm
tones can be routed to the
wireline
and/or over the air, and are
always
heard
in
the local speaker.
Alarm
tone beeps generate
every
ten seconds, and
if
more than one alarm is
active, the beep messages are sent one after the other (separated
by two
seconds).
There
are
eight pre-defined alarms provided as standard
in
the station.
2-21
NOE