Trouble locating and clearing procedures (continued) 1-549
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
TOPS MPX Power-on self test
(continued)
TOPS MPX terminal power-on self test
At the TOPS MPX terminal
1
Begin the power-on self test.
2
Observe the upper left hand corner of the screen.
As the system unit and memory are tested, the memory size appears in the
upper left corner of the screen.
Note: If an error occurs, a three to five digit error code number will appear
in the upper left corner of the display.
If
Do
power is already on
Activate
the
POWER
OFF
switch on the front of the con-
troller to turn the TOPS MPX
off. Wait 5 s. Turn the power
on. Go to step 2.
power is off
Activate the POWER ON switch
on the front of the controller to
turn the TOPS MPX on. Go to
step 2.
If
DoThen
no error code appeared and the
system beeped once
The test is complete.
Go to
TOPS MPX terminal system di-
agnostic procedure.
MPX
Initialization
Failure:
Function 3
Indicates
that
no
composite
clock is present on the digital te-
lephony card. Check the digital
telephony card cable and the
time source generator. If cable
and TSG are operational, go to
the common procedure to re-
move and replace a TOPS MPX
terminal
error code 165 appears and the
screen is blank
Go to step 3.