Cheetah 64NEX Digital Video Router
Publication 81-9059-0685-0, Rev. A
March 2011
Proprietary Information of PESA
6-1
Chapter 6 O
PERATIONAL
D
ESCRIPTIONS AND
C
ARD
/M
ODULE
I
NSTALLATIONS
This section documents the operational descriptions of the various components of the Cheetah
Series Switchers. Typically, this section is accessed for more concise component information and
how each component is used in the Cheetah Series systems.
Additionally, this section will describe the installation of the various components of the Cheetah
Series Switchers. Even though the unit is shipped with all of the components preinstalled, this
section is typically accessed for basic component information and for their replacement (removal
and installation) sequences.
6.1
C
HEETAH
S
ERIES
P
OWER
S
UPPLIES
6.1.1
Cheetah Series Power Supply Information
Cheetah Series Power Supplies contain electrical shock hazards and should
only be serviced by qualified service personnel with experience in servicing
off-line switching regulators.
There are no user serviceable parts contained in the Cheetah Series Power
Supplies. All service performed on the Power Supplies should be performed
by the PESA Service Department.
High Leakage Current at 240VAC. The Cheetah Series Power Supply
leakage current exceeds 7.0mA when used at 240 VAC because of leakage
through emission filter capacitors.
The Cheetah Power Supply is responsible for providing a regulated ±28VDC @22A to the
switching frame. The Cheetah Power Supply is designed to operate automatically with input AC
line voltage ranges from 95-240 VAC and with AC line frequencies of 50/60 Hz. All Cheetah
power supplies have built-in, over-current protection circuitry. When two supplies are used, each
supply is electrically connected to a common/dedicated buss within the chassis.
Additionally, each power supply contains dual internal fan controller systems that are isolated
from the main DC power output buss connections. Depending on the chassis, there are
dependent power supply installation configurations to satisfy the fan operations. In a two-supply
system, one supply module becomes the master and the other becomes the slave.
In the event of a Cheetah Power Supply failure, return the malfunctioning unit to the PESA
Service Department for replacement. The power supplies contain lethal voltages when operating
and should be serviced only by the PESA Service Department. Please call the PESA Service
Department for a RMA number before returning any units for replacement. The Service
Department’s phone number is listed on the front page of this manual.
Summary of Contents for 64NEX
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