Nortel DMS-100 Series Replacement Procedures page 562

1-530 XPM card replacement procedures
NT2X70
in an SMU
(continued)
At the SME frame:
10
11
12
13
14
15
16
297-8021-547 Standard 14.02 May 2001
unit_no
is the number of the inactive SMU unit (0 or 1)
Put on a wrist strap.
Power down the unit by setting the ON/OFF switch on the power converter
faceplate to the OFF position. The converter Fail light emitting diode (LED)
is on and the Frame Fail lamp on the frame supervisory panel (FSP) is on.
An audible alarm may sound.
If an alarm does sound, silence it by typing
>SIL
and pressing the Enter key.
Go to the common replacing a card procedure in this document, then return
to step 13 of this procedure.
Power up the inactive SMU unit as follows:
a Ensure the power converter card (NT2X70) is inserted. A major audible
alarm may sound. This alarm is silenced when power is restored to the
converter.
b Set the Power switch to the On position.
If FSP is equipped with
fuses
circuit breakers
Press and hold the Reset button for 1 s. Both the converter Fail LED and
Frame fail lamp on the frame supervisory panel (FSP) will be On. Go to step
16.
If you are resetting a NT2X70AA or NT2X70AD card, press the Reset button
while setting the circuit breaker to the On position. If you are resetting a
NT2X70AE card, press the Reset button on the Power switch while setting the
circuit breaker to the On position. The converter Fail LED is on, and the
Frame Fail lamp on the frame supervisory panel is on.
Go to step 16.
Use the following information to determine where to go in this procedure.
If you entered this procedure
from
alarm clearing procedures
other
Do
step 14
step 15
Do
step 20
step 17