Cisco Cisco StadiumVision Director Guida All'Installazione
© 2011 Cisco Systems, Inc. All rights reserved
Page 42 of 71
Adapter Cards
Check the connections on the adapter cards. Be sure they are secured to the
chassis and have not been jarred loose or mechanically damaged.
chassis and have not been jarred loose or mechanically damaged.
Corrosion
The oil from a person’s fingers or prolonged exposure to high temperature or
humidity can corrode the gold-plated edge connectors and pin connectors on
adapter cards in the unit. This corrosion on adapter card connectors is a gradual
process that can eventually lead to intermittent failures of electrical circuits.
humidity can corrode the gold-plated edge connectors and pin connectors on
adapter cards in the unit. This corrosion on adapter card connectors is a gradual
process that can eventually lead to intermittent failures of electrical circuits.
To prevent corrosion, you should avoid touching contacts on adapter cards.
Protecting the unit from corrosive elements is especially important in moist and
salty environments, which tend to promote corrosion. Also, as a further deterrent
to corrosion, the unit should not be used in extreme temperatures.
Protecting the unit from corrosive elements is especially important in moist and
salty environments, which tend to promote corrosion. Also, as a further deterrent
to corrosion, the unit should not be used in extreme temperatures.
Cooling
Warning! Blank faceplates and cover panels serve three important functions:
they prevent exposure to hazardous voltages and currents inside the chassis;
they contain electromagnetic interference (EMI) that might disrupt other
equipment; and they direct the flow of cooling air through the chassis. Do not
operate the system unless all cards, faceplates, front covers, and rear covers are
in place. Statement 1029
they prevent exposure to hazardous voltages and currents inside the chassis;
they contain electromagnetic interference (EMI) that might disrupt other
equipment; and they direct the flow of cooling air through the chassis. Do not
operate the system unless all cards, faceplates, front covers, and rear covers are
in place. Statement 1029
Exhaust fans in the power supply and in the chassis cool the power supply and
the unit by drawing air in through various openings in the front of the chassis and
blowing it out the back. However, the fans also draw dust and other particles into
the chassis, causing contaminant buildup, which results in an increase in the
unit’s internal temperature and interferes with the operation of various
components.
the unit by drawing air in through various openings in the front of the chassis and
blowing it out the back. However, the fans also draw dust and other particles into
the chassis, causing contaminant buildup, which results in an increase in the
unit’s internal temperature and interferes with the operation of various
components.
To avoid these conditions, we recommend keeping your work environment clean
to reduce the amount of dust and dirt around the server, thereby reducing the
amount of contaminants drawn into the server by the fans.
to reduce the amount of dust and dirt around the server, thereby reducing the
amount of contaminants drawn into the server by the fans.
Temperature
Temperature extremes can cause a variety of problems, including premature
aging and failure of chips or mechanical failure of devices. Extreme temperature
fluctuations can cause chips to become loose in their sockets and can cause
expansion and contraction of disk drive platters, resulting in read or write data
errors.
aging and failure of chips or mechanical failure of devices. Extreme temperature
fluctuations can cause chips to become loose in their sockets and can cause
expansion and contraction of disk drive platters, resulting in read or write data
errors.
To minimize the negative effects of temperature on server performance, follow
these guidelines:
these guidelines:
Ensure that the unit is operated in an environment no colder than 50°F (10°C)
or hotter than 95°F (35°C).