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Assembly Descriptions
A6 Power Supply Description
Standby Supplies
The A6 Power Supply assembly has two standby supplies that should always on if
the AC input voltage requirements are met. These are the +15V STBY and the
+5.1V STBY supplies. These supplies are used to by the instrument to keep certain
circuits alive even when the power is turned off.
Over Current Protection
The A6 Power Supply assembly has built in over current protection that will shut
down the supply if current draw from the instrument is too great. The power
supply will remain on in over current state for a minimum of 1 second. The power
supply shall turn off no later than 5 seconds after the beginning of the over current
state. The power supply shall remain off until the line voltage is removed and then
reconnected or the front panel power switch is cycled. Over current shut down
does not apply to the standby supplies, the fan voltage, and the +32V A supply.
Thermal Protection
The A6 Power Supply assembly will protect itself by shutting down if it overheats.
It will also reset itself with no user interaction after the temperature is reduced by
approximately 10 degrees C.
Chapter 3
101
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Troubleshooting
