Power-Up/Reset Sequence - Motorola MSF 5000 Instruction Manual

MSF
5000
Instruction Manual
Chapter
2
Operation
Station Diagnostics
Control Tray Status Display Error Code Indication
A
detected failure is indicated when an error code appears on the Status display.
The first
letter (left-most) defines the error code class.
The
letters
xx define
the
specific error code
within
the error code class.
The
error code classes and
Status
display indications
are:
audio
error
-
A.x.x.
o
digital
error
-
d.x.x.
operational error
-
E.x.x.
oa special
test
mode error
-
0.x.x.
undefined error
-
U.x.x.
The error code
display in hexadecimal
format.
All
non-fatal error codes display for two seconds.
All
fatal error codes
display
for
five
seconds.
If
the error code is greater than or equal to hexadecimal $80, the error is fatal and
the station
will
reset after the error code
displays. When
the station resets, the
Status display momentarily shows
8.8.8..
Do
not confuse this single flash
with
flashing Status display
error code indications. When this
occurs, the
Status
display blinks two or four times, then one, then two or four times again,
etc.
Non-fatal
errors
allow
the station to continue
with
diagnostics and eventually
operate after all of the error codes and firmware version numbers display.
NOME
All
three Status display decimal points are
it when
showing
error codes.
This
differentiates error codes
from other
display
modes.
Power-Up/Reset Sequence
68P81092E06
3/14/94
The following describes the sequence of events upon
a station
power-up/
reset:
©
The SSCB activates
the expansion reset
during
the
SSCB
self-test.
While
the
expansion
reset
is active, TTRC, Secure, and any Expansion Tray boards are
held in
reset.
©
The Control Tray Status display-driving circuitry
is tested.
All
of
the
Status
display digits light
(8.8.8.) as a
lamp
test to determine
if
error codes display.
If
this
test
fails, the entire Status
display
flashes
two
times.
©
The SSCB external and internal
RAM
are tested.
The Status display blanks
for approximately
1.5
seconds
while digital
and software diagnostic tests are
performed.
If
this test fails, the entire Status
display
flashes four times.
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