Nortel DMS-100 Series Maintenance Manual page 514

12-166 Star Remote System card replacement procedures
NTTR75
in a STAR
(continued)
13
14
15
16
17
18
297-8353-550 Standard 05.01 March 2001
d Place the card you have removed in an electrostatic discharge (ESD)
protective container.
e Disconnect the four cable connectors on the left half of the NTTR75
maintenance and fuses card and note the connector numbers. Then,
disconnect the two talk battery cables on the right end of the card noting
the connector labels.
f Using a Phillips head screwdriver, unscrew the six Phillips head screws
and remove the lock washers and flat washers that secure the NTTR75
maintenance and fuses card to the back of the FSP front panel.
g Carefully remove the maintenance and fuses card.
h Place the card you have removed in an electrostatic discharge (ESD)
protective container.
i Make sure the replacement card has the same product equipment code
(PEC), including suffix, as the card you just removed.
Install the new maintenance and fuses card by performing the following steps:
a Install the new maintenance and fuses card, positioning it to correctly
connect the cable connectors that were disconnected in step 12e.
b Install the six Phillips head screws, lock washers, and flat washers in the
NTTR75 maintenance and fuses card to secure it to the back of the FSP
front panel. Tighten the screws after all six screws are installed.
c Connect the four cable connectors and the two talk battery cables on the
NTTR75 maintenance and fuses card that were disconnected in step
12e.
d Carefully install the alarms card, positioning it to correctly align the pins
to the connector on the maintenance and fuses card that was
disconnected in step 12b
e Gently press the card in place on the connector.
f Install the four Phillips head screws, lock washers, and flat washers in the
NTTR74 alarms card to secure it to the NTTR75. Tighten the screws after
all four screws are installed.
g Reconnect the two cable connectors that were disconnected in step 12a.
Close the FSP front panel. Secure the FSP front panel by tightening the two
screws that were loosened in step 9.
Connect the power from the PDC to the Hub.
Install the fuses in the FSP front panel that were removed in step 8. Use the
figure titled "FSP front panel" to aid in correct fuse placement.
Restore power to the STARs ringing generators, power converters, line
drawers, and UMP cards by setting the circuit breakers to the On position that
were listed in the table and turned Off in step 7.
Observe the fuses on the FSP front panel. Determine if there are blown
fuses.
If
there are no blown fuses
Do
step 19