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•
Some HDILA TV Power Supplies utilized a Power Factor
Circuit (PFC).
•
The High current demand of the Ballast PWB and Circuit
exceeded the ability of the Standard Bridge
Rectifier/Capacitor combination to deliver the power.
•
As the AC would rise, the Capacitors ability to supply power
diminished causing the Ballast Circuit to Pull Power from the
AC supply.
•
The charge/discharge of these circuits happens quickly
causing AC line Current spikes during these Peak Power
Demand periods.
•
As shown in the figure, this causes AC voltage dips and
affects the Rectified B1 Voltage.
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