© 2011 Harmonic Inc.
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bNSG 9000 & NSG 9000-3G, Rev D
Chapter 4
Maintenance
This chapter contains service information that explains how to replace the following
components of the platform:
Cooling fans unit
power supply
NOTE:
To prevent body injury when servicing this unit in a rack, you must take special precautions to
ensure that the system remains stable.
4.1
Cooling Fans Unit
The NSG 9000 uses four fans to control the temperature of the platform during operation. All
four fans are mounted on the back side of the front panel to allow a quick and easy hot swap
in case of a fan failure.
NOTE:
A failure of a single fan, requires the replacement of the front panel of the platform.
4.1.1
Removing and Replacing the Cooling Fans Unit
The design of the device allows a quick hot swap of the fans. Removing and replacing the fans
does not affect the device operation and should last not more than two minutes. If it exceeds
two minutes, the device may be damaged.
4.1.1.1
Preparation
For removing and replacing the fans, you need the following:
Phillips screwdriver
A new front panel
