ADC Telecommunications Inc. DVLRCSSMR Manuale Utente
ADCP-75-134 • Issue A • April 2002 • Section 5: Maintenance
Page 5-17
©
2002, ADC Telecommunications, Inc.
12. Place
the HU On/Off switch in the ON position (press I).
13. Verify
that the fans run properly following power-up.
14. Notify
the NOC or alarm monitoring system operator that the system is going back online.
5.4
Spectrum Transport Module Fan Replacement Procedure
The
STM is equipped with a rear cooling fan that exhausts heated air from the STM enclosure.
Cool
air enters the STM through vent openings on the side of the enclosure. Replacement of the
fan
requires that the STM be turned off for a short period of time and that the STM be removed
from
the cabinet. Use the following procedure to remove and replace the STM cooling fan.
1. Before
working on the STM or handling a fan, slip on an Electro-Static Discharge (ESD)
wrist
strap and connect the ground wire to an earth ground source. Wear the ESD wrist
strap
while completing each section of the fan installation procedure.
2. Notify
the NOC or alarm monitoring system operator that the system is going offline.
3. Place
the STM On/Off switch in the OFF position (press O).
4. Disconnect
the various power, fiber optic, service, alarm wiring, and coaxial cable
connectors
from the STM front panel as specified in
.
Figure 5-4. Spectrum Transport Module Cable Connections
Warning:
Electronic components can be damaged by static electrical discharge. To prevent
ESD
damage, always wear an ESD wrist strap when working on the HU, STM, or LPA and
when
handling electronic components.
17617-A
Disconnect AC
power connector
Disconnect back-up battery
DC power connector
Disconnect alarm
connector
Disconnect power
monitor cable
connector
Disconnect TX, RX1, and
RX2 coaxial cable
connectors
1
2
3
4
5
6
7
Disconnect optical fiber
connectors. Place a dust
cap over each cable
connector and port adapter.
Disconnect service
connector (if present)