Nortel DMS-100 Series Maintenance Manual page 452

12-104 Star Remote System card replacement procedures
NTTR46
in an RLD
(continued)
9
10
11
297-8353-550 Standard 05.01 March 2001
DANGER
Static electricity damage
Before removing the rectifier, put on a wrist strap and
connect it to the wrist strap grounding point in the top right
corner of the TSS. This protects the equipment against
damage caused by static electricity.
The rectifier is in the lower right corner of the telephony subsystem (TSS).
Perform the following steps to remove and replace the rectifier:
a To remove power from the rectifier, disconnect the gray power cord.
Disconnect the dc output connector.
b Use a Phillips screwdriver to remove the five screws that hold the rectifier
in its holding bracket.
c Remove the rectifier.
d Install a replacement rectifier with one of the same PEC and suffix.
e Use a Phillips screwdriver to install and tighten the screws to the rectifier
holding bracket.
f Connect the dc output connector that was disconnected in step a.a
g To supply power to the rectifier, connect the ac supply cable that was
disconnected in step a.a
h Go to step 13.
Unlock and open the cabinet door. The door alarm generates a Major alarm
at the MAP terminal. Silence the alarm. Use a flat blade screwdriver to
unscrew the two large knurled screws at the left side of the inside TSS cover.
DANGER
Static electricity damage
Before removing the rectifier, put on a wrist strap and
connect it to the wrist strap grounding point in the top left
corner of the TSS. This protects the equipment against
damage caused by static electricity.
The rectifier is at the bottom center of the telephony subsystem (TSS) cover.
Perform the following steps to remove and replace the rectifier.
a Remove power from the rectifier by setting the Rectifier breaker on the ac
panel to the OFF position. Disconnect the rectifier output connector.
Disconnect the power cord from the rectifier. Use a 7mm nutdriver to
loosen the nut that secures the ground strap. Remove the ground strap.
b Open the TSS cover.