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Section 4 — Maintenance
WARNING
Remove all rings and other jewelry when you are working on equipment that
is powered up. Hazardous currents are present in the power supplies, on the
backplane, and on circuit modules. Failure to follow this precaution could
result in severe shock and other injury.
Only qualified service personnel should work on the control panel and
switcher power supply assemblies. Failure to observe this precaution could
result in severe shock or expensive damage to your equipment.
Model 2200 Power Supply Configurations
The standard power supply configuration for the Model 2200 is a single
supply chassis for the Signal Processor Frame and single supply for the
Control Panel. These power supplies are separately connected to AC
source power.
The Control Panel and Signal Processing Frame can each, optionally, be
configured with a second (redundant) power supply.
The redundant supply for the Signal Processing Frame is identical to the
standard supply. It is installed, in the rack below, and in tandem with the
first. They are configured to share the current load, and the failure of a
single supply should not cause a switcher failure.
When the Control Panel is configured with redundant power supplies,
both supplies are installed inside the main control panel tub.
Frame Power Supply Assemblies
Each Signal Processor Power Supply assembly for a Model 2200 Switcher
consists of a rack-mounted frame (assembly number 098901-XX)
containing a Multi-Output Power Supply unit and a high-current +5 Volt
Power Supply unit. The assembly number of the power supply frame is
noted on the back of the frame. Grass Valley assembles and tests the power
supplies; however, the individual power units in the power supplies are
manufactured by other suppliers.
There are two suppliers of the individual power supply units—Pioneer
Magnetics and Todd Products Corporation. Differences between the units
and important notes about them will be presented here for ease of
installation.