Nortel DMS 100 Series Maintenance Manual page 265

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b
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d
19 Jumper connectors and cables can be present. Disconnect and tag these
jumper connectors and cables. Separate the jumper connectors and cables
for use on the replacement unit.
At the front panel of the cabinet
20 Remove the NTRX42 circuit card.
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b
c
d
DMS-100 Family Remote Switching Center Multi-Access Maintenance Manual XPM11 and up
Note the wire color and the location to facilitate connection again.
Safety tag the front of the circuit breaker to indicate maintenance activity.
Use the connector removal tool to disconnect the power connectors to the
circuit card manually. Work from the bottom of the MSP shelf to the top
of the MSP shelf. Manually disconnect and tag the smaller black power
connectors located below the larger blue power connector. Manually
disconnect and tag the large blue power connector. Disconnect and tag
the smaller black power connectors located above the large blue power
connector. Make sure you disconnect the black connectors before you
remove the circuit card.
The connectors have voltage present, but the connectors are insulated.
Secure the connectors to the power-connector bundle with a line-tie until
you connect the connectors again.
Disengage the captive screw that has a spring and is at the top of the
circuit card.
Grasp the top and bottom of unit. Carefully pull the circuit card toward
you until the circuit card clears the shelf.
Replace the circuit card. Make sure the replacement circuit card has the
same PEC and PEC suffix as the circuit card that you replace.
Tighten the spring-loaded captive screw at the top of the circuit card.
RSC-M card replacement procedures
in an RSC-M/MSP
6-113
NTRX42
(continued)