Nortel DMS-100 Series Maintenance Manual page 477

Use a slot screwdriver and turn the three 1/4-turn screws at the bottom of the
cover. Hold the cover by the left and right sides, lift up, and pull the cover
towards you. Set the cover out of the way.
9 The dc panel is in the lower left hand corner of the telephony subsystem
(TSS). Perform the following steps to remove and replace the rectifier:
a Power down the RLD by performing the following steps:
i Set the circuit breaker on the dc panel to OFF.
ii Remove ac power from the RLD as follows.
• if the enclosure is an indoor wall-mounted SRME, remove power
at the local ac power panel
• disconnect the battery connector
iii Note that the green Power On LED is not lit.
iv The RLD is now powered down.
b Use a slot screwdriver to loosen the three screws that hold the dc panel
to the TSS.
c Remove the dc panel.
d Remove the four fuses from the dc panel, recording the fuse size and
color to ensure correct installation in the replacement dc panel
e Install a replacement dc panel with one of the same PEC and suffix.
f Install the four fuses that were removed in step 9d
g Use a slot screwdriver to tighten the three screws that hold the dc panel
to the TSS.
h Power up the RLD by performing the following steps:
i Provide ac power to the RLD as follows.
• if the enclosure is an indoor wall-mounted SRME, supply power
at the local ac power panel
• reconnect the battery connector
ii Set the circuit breaker on the dc panel to ON.
iii Reconnect the battery connector
iv Note that the green Power On LED is lit. Make sure no alarm
condition is indicated by the LEDs on the SMC card.
v The RLD is now powered up
10 Replace the SRME cover. Use a slot screwdriver and turn the three 1/4-turn
screws at the bottom of the cover. Go to step 13.
Star Remote System card replacement procedures
DMS-100 Family NA100 Star Remote System XPM15 and up
12-129
NTTR67
in an RLD
(continued)