Nortel DMS 100 Series Maintenance Manual page 264

6-112 RSC-M card replacement procedures
NTRX42
in an RSC-M/MSP
13
At the RCO2 shelf
14
At the front panel of the cabinet
15
16
At the rear panel of the cabinet
17
18
297-8223-550 Standard 04.02 November 2000
(continued)
Repeat steps 9 to 12 until all units powered by the NTRX42 card are in the
inactive state. Place a sign on the active units that bears the words Active
unit-Do not touch . Do not attach this sign with magnets or tape.
Power down the unit(s) and EXT shelves associated with the NTRX42 cards.
To power down these units and shelves, set the ON/OFF switch on the power
converter faceplate to the OFF position. Both the converter FAIL LED and
FRAME FAIL lamp on the MSP will be ON. An audible alarm can sound. To
silence an alarm, type
>SIL
and press the Enter key.
Determine the defective circuit breaker on the MSP. Switch both breakers on
that circuit card to the OFF position. Safety tag the front of the circuit breaker.
An alarm can sound. To silence the alarm, type
>SIL
and press the Enter key.
WARNING
Risk of injury from high energy levels, static electricity damage
Wear a wrist strap that connects to the wrist-strap grounding
point on the left side of the modular supervisory panel (MSP)
to remove cards. The wrist strap protects the equipment from
static electricity damage.
DANGER
Risk of physical damage to cards
Take these precautions when you remove or insert a card:
1. Do not apply direct pressure to the components.
2. Do not force the cards into the slots.
3. Do not insert metallic objects into the black conntectors.
Voltage is present and equipment damage can result.
Wear a wrist strap.
Open the rear door and locate the NTRX42 circuit card. To verify the card
location, check the slot number stamped in the chassis.