Nortel DMS-100 Series Maintenance Manual page 506

12-158 Star Remote System card replacement procedures
NTTR74
in a STAR
(continued)
FSP front panel shown
in the open position
7
8
297-8353-550 Standard 05.01 March 2001
NTTR75 maintenance
and fuses card
Screws
NTTR74
alarm
card
Screws
Remove the alarm card by performing the following steps:
a Disconnect the two cable connectors on the alarm card and note the
connector numbers.
b Using a Phillips head screwdriver, unscrew the four Phillips head screws
and remove the lock washers and flat washers that secure the NTTR74
alarms card to the NTTR75. Gently pull with a rocking motion until the
pins on the underside of the alarm card are clear of the connector
between the alarm card and the maintenance and fuses card.
c Place the card you have removed in an electrostatic discharge (ESD)
protective container.
d Obtain a replacement card with the same product equipment code
(PEC), including suffix, as the card you just removed.
Install the new alarm card by performing the following steps:
a Carefully install the new alarm card, positioning it to correctly align the
pins to the connector on the maintenance and fuses card where the
alarm card was removed from in step 7a
Connector between
the alarm card and
the maintenance
and fuses card
Connectors
NTTR76 talk battery and
circuit breaker cards