4-9
Servicing Frame Power Supplies
Servicing Frame Power Supplies
Field repair of Model 4000 power supply internal power units is not supported or
recommended. Failed power supply units should be replaced.
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
Frame power supply assemblies. Failure to observe this precaution could
result in severe shock or potentially expensive damage to your equipment.
Model 4000 Power Supply Configurations
The standard power supply configuration for the Model 4000 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 4000 Switcher consists
of a rack-mounted frame (assembly number 098901-XX) containing a Multi-
Output Power Supply unit and a high-c5 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.
Summary of Contents for Grass Valley 4000
Page 3: ...iii Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
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Page 34: ...1 20 Section 1 System Overview ...
Page 138: ...2 104 Section 2 Installation ...
Page 196: ...3 58 Section 3 Functional Description ...
Page 286: ...Index 6 Index ...