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4
Theory of Operation
PSU Assembly
Purpose
– Provides various DC power supplies
Inputs
– 100 Vac ~240 Vac, 50 Hz ~60 Hz, 150 VA Max [from an external source]
– Control lines [from front panel, via main board]
Outputs
70
Charger
PSU
+ Battery
Battery Option
Keysight N1913B/N1914B EPM Series Power Meters Service Guide
Switching
regulation,
distribution
and filtering
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